DERR-2025-000987

December 30, 2024

Mr. Greg Stuart
GT Medical Holding, LLC
579 South Moss Hill Drive
Bountiful, Utah 84010

Subject: Excavation & Fill Soil Analytical Sampling Results
VCP #100 – Utah County Parcel ID 386730002
NOORDA College of Osteopathic Medicine
2162 South 180 East
Provo, Utah County, Utah 84606
CMT Project No. 17813

Mr. Stuart:

CMT Technical Services, Inc. (CMT) has conducted sampling of excavated material from the area north of the
Voluntary Cleanup Program (VCP) boundary at the Noorda College of Osteopathic Medicine (NOORDA COM) Site
(the Site), located at 2162 South 180 East in Provo, Utah County, Utah (Utah County Parcel ID 386730002). This
soil sampling was conducted at the request of John Powell with Civil Solutions Group, Inc. and the Utah
Department of Environmental Quality (UDEQ) to determine the excavated soil’s levels of actionable
polychlorinated biphenyl (PCB) contaminants for use as fill for two ponds on the Site.

The Site is participating in the UDEQ’s VCP and is identified as VCP #100. Construction activities are strictly
managed by the Remedial Action Plan (RAP) to minimize the health and environmental impacts of the buried
landfill debris below the Site.

SAMPLING STRATEGY
On November 13, 2024, Civil Solutions commenced excavation of an area to the north of the VCP boundary on
Utah County Parcel ID 386730002. The excavation was to a depth of no more than approximately four feet below
ground surface (bgs) and was intended not to exceed the thickness of the surface cap above any landfill trash. The
excavated soil was stockpiled along the southern edge of the excavation. The total area proposed to be excavated
was approximately 3 acres. The approximate locations of the excavation and fill areas are shown in Figure 1 on
the next page.

On November 18, 2024, an environmental professional from CMT arrived onsite to inspect the excavations. The
excavated area was approximately 1.5 acres at the time of sampling. Groundwater was not encountered. Landfill
debris was also not encountered in the excavation areas. As the excavation areas were entirely outside of the VCP
boundary, there are no guidelines in the RAP for the number and separation of soil samples. The UDEQ required
only that collected samples be analyzed for PCBs. CMT decided to collect one sample per quarter-acre of land
already excavated or proposed to be excavated, totaling 12 soil samples.

The sampling locations were selected along the length and breadth of the excavated area in the north and spaced
approximately 70-feet apart, and were randomly scattered across the intended excavation area in the south. Soil
Excavation and Fill Soil Evaluation CMT Techincal Services
CMT Project 17813: NOORDA College of Osteopathic Medicine December 30, 2024

2

samples were collected from just below the surface of the excavated surface. CMT collected each of the samples
by hand into laboratory-provided glass containers, labeled each container, and placed them into an insulated
container with ice for preservation. The samples were labeled as NC24-ExFill-##', for NOORDA COM 2024,
Excavation for Fill, then a number identifying the order collected. The approximate locations of the soil grab
samples for the northern excavation area are shown in Figure 2 below. The cooler was then hand-delivered to
Chemtech-Ford Laboratories of Sandy, Utah under chain-of-custody (COC) protocols (Appendix B).

FIGURE 1 – SITE MAP

FIGURE 2 – EXCAVATION & SAMPLING LOCATION MAP
E. 1860 South (University Way)
S.

1
8
0

E
a
s
t

S.

E
as
t
Ba
y

B
l
v
d

Pond Fill
Areas
N
Excavation Area Approximate
VCP #100
Boundary
N
-01 -02 -03 -04
-05 -06
-07
-12
-11
-10 -08
Fill Area
S.

1
8
0

E
a
s
t

Approximate
VCP #100
Boundary NC24-ExFill
-09
Excavation and Fill Soil Evaluation CMT Techincal Services
CMT Project 17813: NOORDA College of Osteopathic Medicine December 30, 2024

3

ANALYTICAL RESULTS
The submitted samples were analyzed for PCBs by EPA Method 8082. A Level III data package was requested.

Soil types encountered included: Sandy Silt, Silty Sand, Silty Sand with gravel, and poorly graded fine Sand. All
samples were collected from soil that also contained coarse rounded to subrounded gravel, pebbles, and cobbles.
Soil colors sampled included: very dark gray, dark gray, very dark grayish brown, dark grayish brown, and brown.
A Photo Log detailing this sampling event is included in Appendix A – Supporting Documentation.

Soil analytical results for PCBs were evaluated against the EPA Regional Screening Levels (RSLs) for Residential
and Industrial Soils (R/I), with a Carcinogenic Screening Level of target cancer risk (TCR) of 0.000001 (1E-06) and
a target hazard quotient (THQ) of 0.1. Copies of EPA RSLs are provided in Appendix A – Supporting
Documentation.

Soil sample laboratory analytical results are provided in Table 1. The soil sampling result tables provide the
results from each sample as well as the applicable NOORDA RAP Action Level, or EPA RSL 1 for residential and
industrial soil. All results are listed in milligrams per kilogram (mg/kg), as specified in the laboratory reports.
Results with “ND <” are Non-Detect concentrations below the specified laboratory reporting limit (LRL), and
results in bold are detections above the LRL. Any results highlighted in light pink are concentrations exceeding
the requisite EPA RSL for the associated COC. The complete detailed laboratory analytical documentation
(including COC forms and lab reports) is provided in Appendix B – Analytical Data.

PCBs
Samples collected at the site were analyzed for eight PCBs as shown in Table 1. The VCP Action Level for PCBs
in soil is 10 mg/kg. Concentrations of all PCBs were not detected above LRLs in all soil samples except PCB-1248
in sample NC24-ExFill-06, which was detected at 0.2 mg/kg. This concentration does not exceed the EPA RSL
for residential soil of 0.23 mg/kg and is also less than the VCP Action Level of 10 mg/kg.

TABLE 1– SOIL SAMPLE ANALYTICAL RESULTS FOR PCBs
SAMPLE # PCB-1016
(mg/kg, dry)
PCB-1221
(mg/kg, dry)
PCB-1232
(mg/kg, dry)
PCB-1242
(mg/kg, dry)
PCB-1248
(mg/kg, dry)
PCB-1254
(mg/kg, dry)
PCB-1260
(mg/kg, dry)
PCB-1268
(mg/kg, dry)
NC24-ExFill-01 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-02 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-03 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-04 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-05 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-06 ND <0.2 ND <0.2 ND <0.2 ND <0.2 0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-07 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-08 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-09 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-10 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-11 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
NC24-ExFill-12 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2 ND <0.2
EPA RSLs R/I 0.41 5.1 0.20 0.83 0.17 0.72 0.23 0.95 0.23 0.94 0.12 0.97 0.24 0.99 NE NE

1 U.S. EPA RSL Summary and Resident Soil Table (TR=1E-06, THQ=0.1) November 2024: https://www.epa.gov/risk/regional-screening-levels-rsls-generic-tables/
Excavation and Fill Soil Evaluation CMT Techincal Services
CMT Project 17813: NOORDA College of Osteopathic Medicine December 30, 2024

4

PCB = polychlorinated biphenyl
mg/kg = milligrams per kilogram
ND <### = Not Detected (result lower than given laboratory reporting limit).
EPA RSLs R/I = Environmental Protection Agency (EPA) Regional Screening Levels (RSLs) for Residential (R) and Industrial/Commercial (I) Soils – May 2024.
NE = regulatory limit is Not Established.
CONCLUSION
Based on a review of the field and laboratory analytical data from the excavation soil sampling, the following is
summarized: PCB-1248 was detected in one (1) sample, NC24-ExFill-06, at 0.2 mg/kg. The concentration does
not exceed the EPA RSL for residential soil of 0.23 mg/kg and is also less than the VCP Action Level of 10 mg/kg.

Based on the results of this sampling event, the soil and materials excavated from the northern excavation area
in Utah County Parcel 386730002 tested below the EPA RSL and VCP RAP action levels for all analytes. Excavated
soil from the northern excavation area may be disposed of or reused as fill.

CLOSURE
CMT appreciates the opportunity to be of service to you on this project. If we can be of further assistance or if
you have any questions regarding this project, please do not hesitate to contact us at [phone].

Sincerely,
CMT Technical Services, Inc.

Michael Sauerwein, P.G. Krystal Walker
Environmental Specialist/Geologist Environmental Engineer

Andrew Harris, P.E.
Geotechnical Division Manager

Figure 1: Site Map
Figure 2: Excavation & Sampling Location Map

Table 1: Soil Analytical Results for PCBs

Attachments
Appendix A: Supporting Documentation
Appendix B: Analytical Data

SUPPORTING
DOCUMENTATION APPENDIX A

PHOTO 1 | View of the Excavated area on November 18, 2024 from the south edge of the excavated area,
looking north.

PHOTO 2 | View of the Excavated area and NC24-ExFill-01 sampling location, from the south edge of the
excavated area, looking northwest.

PHOTO 3 | View of the Excavated area and NC24-ExFill-02 sampling location, from the south edge of the
excavated area, looking north-northwest.

PHOTO 4 | View of the Excavated area and NC24-ExFill-03 sampling location, from the south edge of the
excavated area, looking north.

PHOTO 5 | View of south edge of excavated area, looking northwest.

PHOTO 6 | View of stockpile of excavated cap material to be used as fill, looking northeast.

PHOTO 7 | View of NC24-ExFill-07 test pit and sampling location.

PHOTO 8 | View of NC24-ExFill-08 test pit and sampling location, looking west.

PHOTO 9 | View of NC24-ExFill-09 excavation and sampling location, looking south.

PHOTO 10 | View of NC24-ExFill-10 test pit and sampling location.

PHOTO 11 | View of NC24-ExFill-11 test pit and sampling location.

PHOTO 12 | View of NC24-ExFill-12 test pit and sampling location.

United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
3.00E-04 O 1 0.1 Acephate 30560-19-1 1.9E+01 n 2.5E+02 n 6.0E+00 n 1.3E-03 n
2.20E-06 I 9.00E-03 I V 1 1.07E+05 Acetaldehyde 75-07-0 1.1E+01 c**4.9E+01 c**1.3E+00 c**5.6E+00 c**2.6E+00 c**5.2E-04 c**
2.00E-02 I 1 0.1 Acetochlor 34256-82-1 1.3E+03 n 1.6E+04 n 3.5E+02 n 2.8E-01 n
9.00E-01 I V 1 1.14E+05 Acetone 67-64-1 7.0E+04 n 1.1E+06 nms 1.8E+04 n 3.7E+00 n
2.00E-03 X 1 0.1 Acetone Cyanohydrin 75-86-5 2.8E+06 nm 1.2E+07 nm 2.1E+00 n 8.8E+00 n
6.00E-02 I V 1 1.28E+05 Acetonitrile 75-05-8 8.1E+02 n 3.4E+03 n 6.3E+01 n 2.6E+02 n 1.3E+02 n 2.6E-02 n
1.00E-01 I V 1 2.52E+03 Acetophenone 98-86-2 7.8E+03 ns 1.2E+05 nms 1.9E+03 n 5.8E-01 n
3.80E+00 C 1.30E-03 C 1 0.1 Acetylaminofluorene, 2-53-96-3 1.4E-01 c 6.0E-01 c 2.2E-03 c 9.4E-03 c 1.6E-02 c 7.5E-05 c
5.00E-04 I 2.00E-05 I V 1 2.27E+04 Acrolein 107-02-8 1.4E-01 n 6.0E-01 n 2.1E-02 n 8.8E-02 n 4.2E-02 n 8.4E-06 n
5.00E-01 I 1.00E-04 I 2.00E-03 I 6.00E-03 I M 1 0.1 Acrylamide 79-06-1 2.4E-01 c 4.6E+00 c 1.0E-02 c 1.2E-01 c 5.0E-02 c 1.1E-05 c
5.00E-01 I 2.00E-04 P V 1 1.09E+05 Acrylic Acid 79-10-7 2.0E+01 n 8.3E+01 n 2.1E-01 n 8.8E-01 n 4.2E-01 n 8.5E-05 n
5.40E-01 I 6.80E-05 I 9.00E-05 T 2.00E-03 I V 1 1.13E+04 Acrylonitrile 107-13-1 2.5E-01 c*1.1E+00 c*4.1E-02 c*1.8E-01 c*5.2E-02 c*1.1E-05 c*
6.00E-03 P 1 0.1 Adiponitrile 111-69-3 8.5E+06 nm 3.6E+07 nm 6.3E+00 n 2.6E+01 n
5.60E-02 C 1.00E-02 I 1 0.1 Alachlor 15972-60-8 9.7E+00 c*4.1E+01 c 1.1E+00 c 2.0E+00 8.7E-04 c 1.6E-03
1.00E-03 I 1 0.1 Aldicarb 116-06-3 6.3E+01 n 8.2E+02 n 2.0E+01 n 3.0E+00 4.9E-03 n 7.5E-04
1.00E-03 I 1 0.1 Aldicarb Sulfone 1646-88-4 6.3E+01 n 8.2E+02 n 2.0E+01 n 2.0E+00 4.4E-03 n 4.4E-04
1 0.1 Aldicarb sulfoxide 1646-87-3 4.0E+00 8.8E-04
1.70E+01 I 4.90E-03 I 3.00E-05 I V 1 Aldrin 309-00-2 3.9E-02 c*1.8E-01 c 5.7E-04 c 2.5E-03 c 9.2E-04 c 1.5E-04 c
4.00E-03 P 1.00E-04 X V 1 1.11E+05 Allyl Alcohol 107-18-6 3.5E+00 n 1.5E+01 n 1.0E-01 n 4.4E-01 n 2.1E-01 n 4.2E-05 n
2.10E-02 C 6.00E-06 C 1.00E-03 I V 1 1.42E+03 Allyl Chloride 107-05-1 7.2E-01 c**3.2E+00 c**4.7E-01 c**2.0E+00 c**7.3E-01 c**2.3E-04 c**
1.00E+00 P 5.00E-03 P 1 Aluminum 7429-90-5 7.7E+04 n 1.1E+06 nm 5.2E+00 n 2.2E+01 n 2.0E+04 n 3.0E+04 n
4.00E-04 I 1 Aluminum Phosphide 20859-73-8 3.1E+01 n 4.7E+02 n 8.0E+00 n
9.00E-03 I 1 0.1 Ametryn 834-12-8 5.7E+02 n 7.4E+03 n 1.5E+02 n 1.6E-01 n
2.10E+01 C 6.00E-03 C 1 0.1 Aminobiphenyl, 4-92-67-1 2.6E-02 c 1.1E-01 c 4.7E-04 c 2.0E-03 c 3.0E-03 c 1.5E-05 c
8.00E-02 P 1 0.1 Aminophenol, m-591-27-5 5.1E+03 n 6.6E+04 n 1.6E+03 n 6.1E-01 n
4.00E-03 X 1 0.1 Aminophenol, o-95-55-6 2.5E+02 n 3.3E+03 n 7.9E+01 n 3.0E-02 n
2.00E-02 P 1 0.1 Aminophenol, p-123-30-8 1.3E+03 n 1.6E+04 n 4.0E+02 n 1.5E-01 n
2.50E-03 I 1 0.1 Amitraz 33089-61-1 1.6E+02 n 2.1E+03 n 8.2E+00 n 4.2E+00 n
5.00E-01 I V 1 Ammonia 7664-41-7 5.2E+02 n 2.2E+03 n
2.00E-03 X 1 0.1 Ammonium Picrate 131-74-8 1.3E+02 n 1.6E+03 n 4.0E+01 n 1.9E-01 n
2.00E-01 I 1 Ammonium Sulfamate 7773-06-0 1.6E+04 n 2.3E+05 nm 4.0E+03 n
3.00E-03 X V 1 1.37E+04 Amyl Alcohol, tert-75-85-4 8.2E+01 n 3.4E+02 n 3.1E+00 n 1.3E+01 n 6.3E+00 n 1.3E-03 n
5.70E-03 I 1.60E-06 C 7.00E-03 P 1.00E-03 I 1 0.1 Aniline 62-53-3 9.5E+01 c**4.0E+02 c*1.0E+00 n 4.4E+00 n 1.3E+01 c*4.6E-03 c*
4.00E-02 P 2.00E-03 X 1 0.1 Anthraquinone, 9,10-84-65-1 1.4E+01 c**5.7E+01 c*1.4E+00 c*1.4E-02 c*
4.00E-04 I 3.00E-04 A 0.15 Antimony (metallic)7440-36-0 3.1E+01 n 4.7E+02 n 3.1E-01 n 1.3E+00 n 7.8E+00 n 6.0E+00 3.5E-01 n 2.7E-01
5.00E-04 H 0.15 Antimony Pentoxide 1314-60-9 3.9E+01 n 5.8E+02 n 9.7E+00 n
4.00E-04 H 0.15 Antimony Tetroxide 1332-81-6 3.1E+01 n 4.7E+02 n 7.8E+00 n
2.00E-04 I 0.15 Antimony Trioxide 1309-64-4 2.8E+05 nm 1.2E+06 nm 2.1E-01 n 8.8E-01 n
1.50E+00 I 4.30E-03 I 3.00E-04 I 1.50E-05 C 1 0.03 Arsenic, Inorganic 7440-38-2 6.8E-01 c*G 3.0E+00 cG 6.5E-04 c*2.9E-03 c*5.2E-02 c 1.0E+01 1.5E-03 c 2.9E-01
3.50E-06 C 5.00E-05 I 1 Arsine 7784-42-1 2.7E-01 n 4.1E+00 n 5.2E-02 n 2.2E-01 n 7.0E-02 n
1 Asbestos (units in fibers)1332-21-4 7.0E+06(G)
3.60E-01 O 1 0.1 Asulam 3337-71-1 2.3E+04 n 3.0E+05 nm 7.2E+03 n 1.8E+00 n
2.30E-01 C 3.00E-03 A 1 0.1 Atrazine 1912-24-9 2.4E+00 c*1.0E+01 c 3.0E-01 c 3.0E+00 2.0E-04 c 1.9E-03
8.80E-01 C 2.50E-04 C 1 0.1 Auramine 492-80-8 6.2E-01 c 2.6E+00 c 1.1E-02 c 4.9E-02 c 7.8E-02 c 7.1E-04 c
4.00E-04 I 1 0.1 Avermectin B1 65195-55-3 2.5E+01 n 3.3E+02 n 8.0E+00 n 1.4E+01 n
3.00E-03 A 1.00E-02 A 1 0.1 Azinphos-methyl 86-50-0 1.9E+02 n 2.5E+03 n 1.0E+01 n 4.4E+01 n 5.6E+01 n 1.7E-02 n
1.10E-01 I 3.10E-05 I V 1 Azobenzene 103-33-3 5.6E+00 c 2.6E+01 c 9.1E-02 c 4.0E-01 c 1.2E-01 c 9.3E-04 c
1.00E+00 P 7.00E-06 P 1 0.1 Azodicarbonamide 123-77-3 8.6E+03 n 4.0E+04 n 7.3E-03 n 3.1E-02 n 2.0E+04 n 6.8E+00 n
2.00E-01 I 5.00E-04 H 0.07 Barium 7440-39-3 1.5E+04 n 2.2E+05 nm 5.2E-01 n 2.2E+00 n 3.8E+03 n 2.0E+03 1.6E+02 n 8.2E+01
5.00E-03 O V 1 Benfluralin 1861-40-1 3.9E+02 n 5.8E+03 n 2.8E+01 n 9.4E-01 n
5.00E-02 I 1 0.1 Benomyl 17804-35-2 3.2E+03 n 4.1E+04 n 9.7E+02 n 8.5E-01 n
2.00E-01 I 1 0.1 Bensulfuron-methyl 83055-99-6 1.3E+04 n 1.6E+05 nm 3.9E+03 n 1.0E+00 n
3.00E-02 I 1 0.1 Bentazon 25057-89-0 1.9E+03 n 2.5E+04 n 5.7E+02 n 1.2E-01 n
4.00E-03 P 1.00E-01 I V 1 1.16E+03 Benzaldehyde 100-52-7 1.7E+02 c*8.2E+02 c 1.9E+01 c 4.1E-03 c
5.50E-02 I 7.80E-06 I 4.00E-03 I 3.00E-02 I V 1 1.82E+03 Benzene 71-43-2 1.2E+00 c*5.1E+00 c*3.6E-01 c*1.6E+00 c*4.6E-01 c*5.0E+00 2.3E-04 c*2.6E-03
4.00E-03 C V 1 1.82E+02 Benzene, Trimethyl 25551-13-7 5.1E+01 n 2.2E+02 ns 4.2E+00 n 1.8E+01 n 8.3E+00 n 1.2E-02 n
1.00E-01 X 3.00E-04 X 1 0.1 Benzenediamine-2-methyl sulfate, 1,4-6369-59-1 5.4E+00 c**2.3E+01 c*7.8E-01 c**2.2E-04 c**
1.00E-03 P V 1 1.26E+03 Benzenethiol 108-98-5 7.8E+01 n 1.2E+03 n 1.7E+01 n 1.1E-02 n
2.30E+02 I 6.70E-02 I 3.00E-03 I M 1 0.1 Benzidine 92-87-5 5.3E-04 c 1.0E-02 c 1.5E-05 c 1.8E-04 c 1.1E-04 c 2.8E-07 c
4.00E+00 I 1 0.1 Benzoic Acid 65-85-0 2.5E+05 nm 3.3E+06 nm 7.5E+04 n 1.5E+01 n
1.30E+01 I V 1 3.24E+02 Benzotrichloride 98-07-7 5.3E-02 c 2.5E-01 c 3.0E-03 c 6.6E-06 c
1.00E-01 P 1 0.1 Benzyl Alcohol 100-51-6 6.3E+03 n 8.2E+04 n 2.0E+03 n 4.8E-01 n
1.70E-01 I 4.90E-05 C 2.00E-03 P 1.00E-03 P V 1 1.46E+03 Benzyl Chloride 100-44-7 1.1E+00 c*4.8E+00 c*5.7E-02 c*2.5E-01 c*8.9E-02 c*9.8E-05 c*
2.40E-03 I 2.00E-03 I 2.00E-05 I 0.007 Beryllium and compounds 7440-41-7 1.6E+02 n 2.3E+03 n 1.2E-03 c*5.1E-03 c*2.5E+01 n 4.0E+00 1.9E+01 n 3.2E+00
9.00E-03 P 1 0.1 Bifenox 42576-02-3 5.7E+02 n 7.4E+03 n 1.0E+02 n 7.6E-01 n
1.50E-02 I 1 0.1 Biphenthrin 82657-04-3 9.5E+02 n 1.2E+04 n 3.0E+02 n 1.4E+03 n
8.00E-03 I 5.00E-01 I 4.00E-04 X V 1 Biphenyl, 1,1'-92-52-4 4.7E+01 n 2.0E+02 n 4.2E-01 n 1.8E+00 n 8.3E-01 n 8.7E-03 n
4.00E-02 I V 1 1.02E+03 Bis(2-chloro-1-methylethyl) ether 108-60-1 3.1E+03 ns 4.7E+04 ns 7.1E+02 n 2.6E-01 n
3.00E-03 P 1 0.1 Bis(2-chloroethoxy)methane 111-91-1 1.9E+02 n 2.5E+03 n 5.9E+01 n 1.3E-02 n
1.10E+00 I 3.30E-04 I V 1 5.05E+03 Bis(2-chloroethyl)ether 111-44-4 2.3E-01 c 1.0E+00 c 8.5E-03 c 3.7E-02 c 1.4E-02 c 3.6E-06 c
2.20E+02 I 6.20E-02 I V 1 4.22E+03 Bis(chloromethyl)ether 542-88-1 8.3E-05 c 3.6E-04 c 4.5E-05 c 2.0E-04 c 7.2E-05 c 1.7E-08 c
5.00E-02 I 1 0.1 Bisphenol A 80-05-7 3.2E+03 n 4.1E+04 n 7.7E+02 n 5.8E+01 n
2.00E-01 I 2.00E-02 H 1 Boron And Borates Only 7440-42-8 1.6E+04 n 2.3E+05 nm 2.1E+01 n 8.8E+01 n 4.0E+03 n 1.3E+01 n
2.00E+00 P 2.00E-02 P V 1 Boron Trichloride 10294-34-5 1.6E+05 nm 2.3E+06 nm 2.1E+01 n 8.8E+01 n 4.2E+01 n
4.00E-02 C 1.30E-02 C V 1 Boron Trifluoride 7637-07-2 3.1E+03 n 4.7E+04 n 1.4E+01 n 5.7E+01 n 2.6E+01 n
7.00E-01 I 1.40E-04 C 4.00E-03 I 1 Bromate 15541-45-4 9.9E-01 c 4.7E+00 c 2.0E-02 c 8.8E-02 c 1.1E-01 c 1.0E+01 8.5E-04 c 7.7E-02
1.00E-04 X 6.00E-05 X V 1 2.38E+03 Bromo-2-chloroethane, 1-107-04-0 3.5E-01 n 1.5E+00 n 6.3E-02 n 2.6E-01 n 1.2E-01 n 3.3E-05 n
3.00E-04 X V 1 8.96E+02 Bromo-3-fluorobenzene, 1-1073-06-9 2.3E+01 n 3.5E+02 n 4.9E+00 n 4.7E-03 n
3.00E-04 X V 1 3.23E+02 Bromo-4-fluorobenzene, 1-460-00-4 2.3E+01 n 3.5E+02 ns 4.6E+00 n 4.4E-03 n
1.70E-03 C 1 0.1 Bromoacetic acid 79-08-3 1.1E+02 n 1.4E+03 n 3.4E+01 n 6.0E+01(G)6.9E-03 n 1.2E-02
8.00E-03 I 6.00E-02 I V 1 6.79E+02 Bromobenzene 108-86-1 2.9E+02 n 1.8E+03 ns 6.3E+01 n 2.6E+02 n 6.2E+01 n 4.2E-02 n
4.00E-02 X V 1 4.04E+03 Bromochloromethane 74-97-5 1.5E+02 n 6.3E+02 n 4.2E+01 n 1.8E+02 n 8.3E+01 n 2.1E-02 n
6.20E-02 I 3.70E-05 C 8.00E-03 P V 1 9.32E+02 Bromodichloromethane 75-27-4 2.9E-01 c 1.3E+00 c 7.6E-02 c 3.3E-01 c 1.3E-01 c 8.0E+01(G)3.6E-05 c 2.2E-02
7.90E-03 I 1.10E-06 I 2.00E-02 I V 1 9.15E+02 Bromoform 75-25-2 1.9E+01 c*8.6E+01 c 2.6E+00 c 1.1E+01 c 3.3E+00 c 8.0E+01(G)8.7E-04 c 2.1E-02
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
Page 1 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
1.40E-03 I 5.00E-03 I V 1 3.59E+03 Bromomethane 74-83-9 6.8E+00 n 3.0E+01 n 5.2E+00 n 2.2E+01 n 7.5E+00 n 1.9E-03 n
5.00E-03 H V 1 Bromophos 2104-96-3 3.9E+02 n 5.8E+03 n 3.5E+01 n 1.5E-01 n
3.70E-06 C 1.00E-01 A V 1 9.66E+02 Bromopropane, 1-106-94-5 1.6E+00 c 7.1E+00 c 7.6E-01 c 3.3E+00 c 1.5E+00 c 4.6E-04 c
1.03E-01 O 1.50E-02 O 1 0.1 Bromoxynil 1689-84-5 5.3E+00 c 2.2E+01 c 6.1E-01 c 5.2E-04 c
1.03E-01 O 1.50E-02 O V 1 Bromoxynil Octanoate 1689-99-2 6.7E+00 c 3.2E+01 c 2.4E-01 c 2.1E-03 c
6.00E-01 C 3.00E-05 I 2.00E-03 I V 1 6.67E+02 Butadiene, 1,3-106-99-0 7.6E-02 c*3.3E-01 c*9.4E-02 c*4.1E-01 c*7.1E-02 c*3.9E-05 c*
1.00E-01 I V 1 7.64E+03 Butanol, N-71-36-3 7.8E+03 ns 1.2E+05 nms 2.0E+03 n 4.1E-01 n
5.00E-04 I 4.00E-01 I 5.00E+00 I V 1 Butyl Alcohol, t-75-65-0 1.4E+03 c*6.5E+03 c*5.2E+03 n 2.2E+04 n 1.5E+02 c*3.2E-02 c*
2.00E+00 P 3.00E+01 P V 1 2.13E+04 Butyl alcohol, sec-78-92-2 1.3E+05 nms 1.5E+06 nms 3.1E+04 n 1.3E+05 n 2.4E+04 n 5.0E+00 n
5.00E-02 I V 1 Butylate 2008-41-5 3.9E+03 n 5.8E+04 n 4.6E+02 n 4.5E-01 n
2.00E-04 C 5.70E-08 C 1 0.1 Butylated hydroxyanisole 25013-16-5 2.7E+03 c 1.1E+04 c 4.9E+01 c 2.2E+02 c 1.5E+02 c 2.9E-01 c
3.60E-03 P 3.00E-01 P 1 0.1 Butylated hydroxytoluene 128-37-0 1.5E+02 c 6.4E+02 c 3.4E+00 c 1.0E-01 c
5.00E-02 P V 1 1.08E+02 Butylbenzene, n-104-51-8 3.9E+03 ns 5.8E+04 ns 1.0E+03 n 3.2E+00 n
1.00E-01 X V 1 1.45E+02 Butylbenzene, sec-135-98-8 7.8E+03 ns 1.2E+05 nms 2.0E+03 n 5.9E+00 n
1.00E-01 X V 1 1.83E+02 Butylbenzene, tert-98-06-6 7.8E+03 ns 1.2E+05 nms 6.9E+02 n 1.6E+00 n
2.00E-02 A 1 0.1 Cacodylic Acid 75-60-5 1.3E+03 n 1.6E+04 n 4.0E+02 n 1.1E-01 n
1.80E-03 I 1.00E-04 A 1.00E-05 A 0.025 0.001 Cadmium (Diet)7440-43-9 7.1E+00 n 1.0E+02 n 1.6E-03 c**6.8E-03 c**
1.80E-03 I 1.00E-04 A 1.00E-05 A 0.05 0.001 Cadmium (Water)7440-43-9 1.6E-03 c**6.8E-03 c**1.8E+00 n 5.0E+00 1.4E-01 n 3.8E-01
5.00E-01 I 2.20E-03 C 1 0.1 Caprolactam 105-60-2 3.1E+04 n 4.0E+05 nm 2.3E+00 n 9.6E+00 n 9.9E+03 n 2.5E+00 n
1.50E-01 C 4.30E-05 C 2.00E-03 I 1 0.1 Captafol 2425-06-1 3.6E+00 c*1.5E+01 c 6.5E-02 c 2.9E-01 c 4.0E-01 c*7.1E-04 c*
2.30E-03 C 6.60E-07 C 1.30E-01 I 1 0.1 Captan 133-06-2 2.4E+02 c*1.0E+03 c 4.3E+00 c 1.9E+01 c 3.1E+01 c*2.2E-02 c*
1.00E-01 I 1 0.1 Carbaryl 63-25-2 6.3E+03 n 8.2E+04 n 1.8E+03 n 1.7E+00 n
5.00E-03 I 1 0.1 Carbofuran 1563-66-2 3.2E+02 n 4.1E+03 n 9.4E+01 n 4.0E+01 3.7E-02 n 1.6E-02
1.00E-01 I 7.00E-01 I V 1 7.38E+02 Carbon Disulfide 75-15-0 7.7E+02 ns 3.5E+03 ns 7.3E+02 n 3.1E+03 n 8.1E+02 n 2.4E-01 n
7.00E-02 I 6.00E-06 I 4.00E-03 I 1.00E-01 I V 1 4.58E+02 Carbon Tetrachloride 56-23-5 6.5E-01 c 2.9E+00 c 4.7E-01 c 2.0E+00 c 4.6E-01 c 5.0E+00 1.8E-04 c 1.9E-03
1.00E-01 P V 1 5.89E+03 Carbonyl Sulfide 463-58-1 6.7E+01 n 2.8E+02 n 1.0E+02 n 4.4E+02 n 2.1E+02 n 5.1E-01 n
1.00E-02 I 1 0.1 Carbosulfan 55285-14-8 6.3E+02 n 8.2E+03 n 5.1E+01 n 1.2E+00 n
1.00E-01 I 1 0.1 Carboxin 5234-68-4 6.3E+03 n 8.2E+04 n 1.9E+03 n 1.0E+00 n
9.00E-04 I 1 Ceric oxide 1306-38-3 1.3E+06 nm 5.4E+06 nm 9.4E-01 n 3.9E+00 n
1.00E-01 I V 1 Chloral Hydrate 302-17-0 7.8E+03 n 1.2E+05 nm 2.0E+03 n 4.0E-01 n
1.50E-02 I 1 0.1 Chloramben 133-90-4 9.5E+02 n 1.2E+04 n 2.9E+02 n 7.0E-02 n
1 0.1 Chloramines, Organic E701235 4.0E+03(G)
4.03E-01 H 1 0.1 Chloranil 118-75-2 1.3E+00 c 5.7E+00 c 1.8E-01 c 1.5E-04 c
5.00E-04 G V 1 0.04 Chlordane (alpha)5103-71-9 3.6E+01 n 5.0E+02 n 3.6E+00 n 4.9E-01 n
5.00E-04 G V 1 0.04 Chlordane (gamma)5103-74-2 3.6E+01 n 5.0E+02 n 1.0E+01 n 1.4E+00 n
3.50E-01 I 1.00E-04 I 5.00E-04 I 7.00E-04 I V 1 0.04 Chlordane (technical mixture)12789-03-6 1.7E+00 c*7.7E+00 c*2.8E-02 c*1.2E-01 c*2.0E-02 c*2.0E+00 2.7E-03 c*2.7E-01
1.00E+01 I 4.60E-03 C 3.00E-04 I 1 0.1 Chlordecone (Kepone)143-50-0 5.4E-02 c 2.3E-01 c 6.1E-04 c 2.7E-03 c 3.5E-03 c 1.2E-04 c
7.00E-04 A 1 0.1 Chlorfenvinphos 470-90-6 4.4E+01 n 5.7E+02 n 1.1E+01 n 3.1E-02 n
9.00E-02 O 1 0.1 Chlorimuron, Ethyl-90982-32-4 5.7E+03 n 7.4E+04 n 1.8E+03 n 6.0E-01 n
1.00E-01 I 1.45E-04 A V 1 2.78E+03 Chlorine 7782-50-5 1.8E-01 n 7.8E-01 n 1.5E-01 n 6.4E-01 n 3.0E-01 n 4.0E+03(G)1.5E-04 n 2.0E+00
3.00E-02 I 2.00E-04 I V 1 Chlorine Dioxide 10049-04-4 2.3E+03 n 3.4E+04 n 2.1E-01 n 8.8E-01 n 4.2E-01 n 8.0E+02(G)
3.00E-02 I 1 Chlorite (Sodium Salt)7758-19-2 2.3E+03 n 3.5E+04 n 6.0E+02 n 1.0E+03
5.00E+01 I V 1 1.15E+03 Chloro-1,1-difluoroethane, 1-75-68-3 5.4E+04 ns 2.3E+05 nms 5.2E+04 n 2.2E+05 n 1.0E+05 n 5.2E+01 n
3.00E-04 I 2.00E-02 H 2.00E-02 I V 1 7.86E+02 Chloro-1,3-butadiene, 2- (Chloroprene)126-99-8 1.0E-02 c 4.4E-02 c 9.4E-03 c 4.1E-02 c 1.9E-02 c 9.8E-06 c
4.60E-01 H 1 0.1 Chloro-2-methylaniline HCl, 4-3165-93-3 1.2E+00 c 5.0E+00 c 1.7E-01 c 1.5E-04 c
1.00E-01 P 7.70E-05 C 3.00E-03 X 1 0.1 Chloro-2-methylaniline, 4-95-69-2 5.4E+00 c*2.3E+01 c 3.6E-02 c 1.6E-01 c 7.0E-01 c*4.0E-04 c*
2.70E-01 X V 1 1.18E+04 Chloroacetaldehyde, 2-107-20-0 2.6E+00 c 1.2E+01 c 2.9E-01 c 5.8E-05 c
3.50E-03 C 1 0.1 Chloroacetic Acid 79-11-8 2.2E+02 n 2.9E+03 n 7.0E+01 n 6.0E+01(G)1.4E-02 n 1.2E-02
3.00E-05 I 1 0.1 Chloroacetophenone, 2-532-27-4 4.3E+04 n 1.8E+05 nm 3.1E-02 n 1.3E-01 n
2.00E-01 P 5.00E-04 P 1 0.1 Chloroaniline, p-106-47-8 2.7E+00 c*1.1E+01 c*3.7E-01 c*1.6E-04 c*
2.00E-02 I 5.00E-02 P V 1 7.61E+02 Chlorobenzene 108-90-7 2.8E+02 n 1.3E+03 ns 5.2E+01 n 2.2E+02 n 7.8E+01 n 1.0E+02 5.3E-02 n 6.8E-02
1.00E-01 X 1 0.1 Chlorobenzene sulfonic acid, p-98-66-8 6.3E+03 n 8.2E+04 n 2.0E+03 n 4.7E-01 n
1.10E-01 C 3.10E-05 C 2.00E-02 I 1 0.1 Chlorobenzilate 510-15-6 4.9E+00 c 2.1E+01 c 9.1E-02 c 4.0E-01 c 3.1E-01 c 1.0E-03 c
3.00E-02 X 1 0.1 Chlorobenzoic Acid, p-74-11-3 1.9E+03 n 2.5E+04 n 5.1E+02 n 1.3E-01 n
8.60E-06 C 3.00E-03 P 3.00E-01 P V 1 2.90E+02 Chlorobenzotrifluoride, 4-98-56-6 2.2E+00 c*9.6E+00 c 3.3E-01 c 1.4E+00 c 6.5E-01 c*2.3E-03 c*
4.00E-02 P V 1 7.28E+02 Chlorobutane, 1-109-69-3 3.1E+03 ns 4.7E+04 ns 6.4E+02 n 2.6E-01 n
5.00E+01 I V 1 1.68E+03 Chlorodifluoromethane 75-45-6 4.9E+04 ns 2.1E+05 nms 5.2E+04 n 2.2E+05 n 1.0E+05 n 4.3E+01 n
2.00E-02 P V 1 1.11E+05 Chloroethanol, 2-107-07-3 1.6E+03 n 2.3E+04 n 4.0E+02 n 8.1E-02 n
3.10E-02 C 2.30E-05 I 1.00E-02 I 1.95E-03 T V 1 2.54E+03 Chloroform 67-66-3 3.2E-01 c*1.4E+00 c*1.2E-01 c*5.3E-01 c*2.2E-01 c*8.0E+01(G)6.1E-05 c*2.2E-02
9.00E-02 I V 1 1.32E+03 Chloromethane 74-87-3 1.1E+02 n 4.6E+02 n 9.4E+01 n 3.9E+02 n 1.9E+02 n 4.9E-02 n
2.40E+00 C 6.90E-04 C V 1 9.32E+03 Chloromethyl Methyl Ether 107-30-2 2.0E-02 c 8.9E-02 c 4.1E-03 c 1.8E-02 c 6.5E-03 c 1.4E-06 c
3.00E-01 P 3.00E-03 P 1.00E-05 X 1 0.1 Chloronitrobenzene, o-88-73-3 1.8E+00 c 7.7E+00 c 1.0E-02 n 4.4E-02 n 2.4E-01 c 2.2E-04 c
6.00E-02 P 7.00E-04 P 2.00E-03 P 1 0.1 Chloronitrobenzene, p-100-00-5 9.0E+00 c**3.8E+01 c*2.1E+00 n 8.8E+00 n 1.2E+00 c*1.1E-03 c*
5.00E-03 I V 1 2.74E+04 Chlorophenol, 2-95-57-8 3.9E+02 n 5.8E+03 n 9.1E+01 n 8.9E-02 n
4.00E-04 C V 1 6.17E+02 Chloropicrin 76-06-2 2.0E+00 n 8.2E+00 n 4.2E-01 n 1.8E+00 n 8.3E-01 n 2.5E-04 n
1.70E-02 C 1.50E-02 I 1 0.1 Chlorothalonil 1897-45-6 3.2E+01 c*1.4E+02 c*4.0E+00 c*9.0E-03 c*
2.00E-02 I V 1 9.07E+02 Chlorotoluene, o-95-49-8 1.6E+03 ns 2.3E+04 ns 2.4E+02 n 2.3E-01 n
2.00E-02 X V 1 2.53E+02 Chlorotoluene, p-106-43-4 1.6E+03 ns 2.3E+04 ns 2.5E+02 n 2.4E-01 n
2.40E+02 C 6.90E-02 C 1 0.1 Chlorozotocin 54749-90-5 2.3E-03 c 9.6E-03 c 4.1E-05 c 1.8E-04 c 3.2E-04 c 7.1E-08 c
5.00E-03 O 1 0.1 Chlorpropham 101-21-3 3.2E+02 n 4.1E+03 n 7.1E+01 n 6.4E-02 n
1.00E-03 A 1 0.1 Chlorpyrifos 2921-88-2 6.3E+01 n 8.2E+02 n 8.4E+00 n 1.2E-01 n
1.00E-02 H 1 0.1 Chlorpyrifos Methyl 5598-13-0 6.3E+02 n 8.2E+03 n 1.2E+02 n 5.4E-01 n
5.00E-02 O 1 0.1 Chlorsulfuron 64902-72-3 3.2E+03 n 4.1E+04 n 9.9E+02 n 8.3E-01 n
1.00E-02 I 1 0.1 Chlorthal-dimethyl 1861-32-1 6.3E+02 n 8.2E+03 n 1.2E+02 n 1.5E-01 n
8.00E-04 H 1 0.1 Chlorthiophos 60238-56-4 5.1E+01 n 6.6E+02 n 2.8E+00 n 7.3E-02 n
6.00E-05 C 0.013 Chromium(III) (Soluble Compounds)16065-83-1 8.5E+04 n 3.6E+05 nm 6.3E-02 n 2.6E-01 n
1.50E+00 I 0.013 Chromium(III), Insoluble Salts 16065-83-1 1.2E+05 nm 1.8E+06 nm 2.2E+04 n 4.0E+07 n
5.00E-01 C 8.40E-02 G 3.00E-03 I 1.00E-04 I M 0.025 Chromium(VI)18540-29-9 3.0E-01 c 6.3E+00 c 1.2E-05 c 1.5E-04 c 3.5E-02 c 6.7E-04 c
0.013 Chromium, Total 7440-47-3 1.0E+02 1.8E+05
1.30E-02 I 1 0.1 Clofentezine 74115-24-5 8.2E+02 n 1.1E+04 n 2.3E+02 n 1.4E+01 n
9.00E-03 P 3.00E-04 P 6.00E-06 P 1 Cobalt 7440-48-4 2.3E+01 n 3.5E+02 n 3.1E-04 c*1.4E-03 c*6.0E+00 n 2.7E-01 n
6.20E-04 I V M 1 Coke Oven Emissions E649830 1.6E-03 c 2.0E-02 c
4.00E-02 H 1 Copper 7440-50-8 3.1E+03 n 4.7E+04 n 8.0E+02 n 1.3E+03 2.8E+01 n 4.6E+01
5.00E-02 I 6.00E-01 C 1 0.1 Cresol, m-108-39-4 3.2E+03 n 4.1E+04 n 6.3E+02 n 2.6E+03 n 9.3E+02 n 7.4E-01 n
Page 2 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
5.00E-02 I 6.00E-01 C 1 0.1 Cresol, o-95-48-7 3.2E+03 n 4.1E+04 n 6.3E+02 n 2.6E+03 n 9.3E+02 n 7.5E-01 n
2.00E-02 P 6.00E-01 C 1 0.1 Cresol, p-106-44-5 1.3E+03 n 1.6E+04 n 6.3E+02 n 2.6E+03 n 3.7E+02 n 3.0E-01 n
1.00E-01 A 1 0.1 Cresol, p-chloro-m-59-50-7 6.3E+03 n 8.2E+04 n 1.4E+03 n 1.7E+00 n
1.00E-01 A 6.00E-01 C 1 0.1 Cresols 1319-77-3 6.3E+03 n 8.2E+04 n 6.3E+02 n 2.6E+03 n 1.5E+03 n 1.3E+00 n
1.90E+00 H 1.00E-03 P V 1 1.66E+04 Crotonaldehyde, trans-123-73-9 3.7E-01 c 1.7E+00 c 4.0E-02 c 8.2E-06 c
1.00E-01 I 4.00E-01 I V 1 2.68E+02 Cumene 98-82-8 1.9E+03 ns 9.9E+03 ns 4.2E+02 n 1.8E+03 n 4.5E+02 n 7.4E-01 n
2.20E-01 C 6.30E-05 C 1 0.1 Cupferron 135-20-6 2.5E+00 c 1.0E+01 c 4.5E-02 c 1.9E-01 c 3.5E-01 c 6.1E-04 c
8.40E-01 H 2.00E-03 H 1 0.1 Cyanazine 21725-46-2 6.5E-01 c 2.7E+00 c 8.8E-02 c 4.1E-05 c
Cyanides
1.00E-03 I 9.00E-03 C 1 ~Calcium Cyanide 592-01-8 7.8E+01 n 1.2E+03 n 9.4E+00 n 3.9E+01 n 2.0E+01 n
5.00E-03 I 1 ~Copper Cyanide 544-92-3 3.9E+02 n 5.8E+03 n 1.0E+02 n
6.00E-04 I 8.00E-04 G V 1 9.54E+05 ~Cyanide (CN-)57-12-5 2.3E+01 n 1.5E+02 n 8.3E-01 n 3.5E+00 n 1.5E+00 n 2.0E+02 1.5E-02 n 2.0E+00
1.00E-03 I V 1 ~Cyanogen 460-19-5 7.8E+01 n 1.2E+03 n 2.0E+01 n
9.00E-02 I V 1 ~Cyanogen Bromide 506-68-3 7.0E+03 n 1.1E+05 nm 1.8E+03 n
5.00E-02 I V 1 ~Cyanogen Chloride 506-77-4 3.9E+03 n 5.8E+04 n 1.0E+03 n
6.00E-04 I 8.00E-04 I V 1 1.00E+07 ~Hydrogen Cyanide 74-90-8 2.3E+01 n 1.5E+02 n 8.3E-01 n 3.5E+00 n 1.5E+00 n 1.5E-02 n
2.00E-03 I 9.00E-03 C 1 ~Potassium Cyanide 151-50-8 1.6E+02 n 2.3E+03 n 9.4E+00 n 3.9E+01 n 4.0E+01 n
5.00E-03 I 0.04 ~Potassium Silver Cyanide 506-61-6 3.9E+02 n 5.8E+03 n 8.2E+01 n
1.00E-01 I 0.04 ~Silver Cyanide 506-64-9 7.8E+03 n 1.2E+05 nm 1.8E+03 n
1.00E-03 I 9.00E-03 C 1 ~Sodium Cyanide 143-33-9 7.8E+01 n 1.2E+03 n 9.4E+00 n 3.9E+01 n 2.0E+01 n 2.0E+02
2.00E-04 P 1 ~Thiocyanates E1790665 1.6E+01 n 2.3E+02 n 4.0E+00 n
2.00E-04 X V 1 ~Thiocyanic Acid 463-56-9 1.6E+01 n 2.3E+02 n 4.0E+00 n
5.00E-02 I 1 ~Zinc Cyanide 557-21-1 3.9E+03 n 5.8E+04 n 1.0E+03 n
6.00E+00 I V 1 1.17E+02 Cyclohexane 110-82-7 6.5E+03 ns 2.7E+04 ns 6.3E+03 n 2.6E+04 n 1.3E+04 n 1.3E+01 n
2.00E-02 X 2.00E-02 X 1 0.1 Cyclohexane, 1,2,3,4,5-pentabromo-6-chloro-87-84-3 2.7E+01 c*1.1E+02 c 2.8E+00 c 1.6E-02 c
5.00E+00 I 7.00E-01 P V 1 5.11E+03 Cyclohexanone 108-94-1 2.8E+04 ns 1.3E+05 nms 7.3E+02 n 3.1E+03 n 1.4E+03 n 3.4E-01 n
5.00E-03 P 1.00E+00 X V 1 2.83E+02 Cyclohexene 110-83-8 3.1E+02 ns 3.1E+03 ns 1.0E+03 n 4.4E+03 n 7.0E+01 n 4.6E-02 n
2.00E-01 I V 1 2.93E+05 Cyclohexylamine 108-91-8 1.6E+04 n 2.3E+05 nm 3.8E+03 n 1.0E+00 n
2.50E-02 I 1 0.1 Cyfluthrin 68359-37-5 1.6E+03 n 2.1E+04 n 1.2E+02 n 3.1E+01 n
5.00E-01 O 1 0.1 Cyromazine 66215-27-8 3.2E+04 n 4.1E+05 nm 9.9E+03 n 2.5E+00 n
3.00E-02 I 1 0.1 Dalapon 75-99-0 1.9E+03 n 2.5E+04 n 6.0E+02 n 2.0E+02 1.2E-01 n 4.1E-02
1.80E-02 C 5.10E-06 C 1.50E-01 I 1 0.1 Daminozide 1596-84-5 3.0E+01 c 1.3E+02 c 5.5E-01 c 2.4E+00 c 4.3E+00 c 9.5E-04 c
7.00E-04 I 7.00E-03 I 1 0.1 Decabromodiphenyl ether, 2,2',3,3',4,4',5,5',6,6'- (BDE-209)1163-19-5 4.4E+02 n 3.3E+03 c**1.1E+02 c**6.2E+01 c**
4.00E-05 I 1 0.1 Demeton 8065-48-3 2.5E+00 n 3.3E+01 n 4.2E-01 n
1.20E-03 I 6.00E-01 I 1 0.1 Di(2-ethylhexyl)adipate 103-23-1 4.5E+02 c*1.9E+03 c 6.5E+01 c 4.0E+02 4.7E+00 c 2.9E+01
6.10E-02 H 1 0.1 Diallate 2303-16-4 8.9E+00 c 3.8E+01 c 5.4E-01 c 8.0E-04 c
7.00E-04 A 1 0.1 Diazinon 333-41-5 4.4E+01 n 5.7E+02 n 1.0E+01 n 6.5E-02 n
8.00E-01 P 6.00E-03 P 2.00E-04 P 2.00E-04 I V M 1 9.79E+02 Dibromo-3-chloropropane, 1,2-96-12-8 5.3E-03 c 6.4E-02 c 1.7E-04 c 2.0E-03 c 3.3E-04 c 2.0E-01 1.4E-07 c 8.6E-05
2.50E-01 C 3.00E-04 C 1 0.1 Dibromoacetic acid 631-64-1 2.2E+00 c**9.2E+00 c*3.1E-01 c*6.0E+01(G)6.3E-05 c*1.2E-02
4.00E-04 X V 1 1.59E+02 Dibromobenzene, 1,3-108-36-1 3.1E+01 n 4.7E+02 ns 5.3E+00 n 5.1E-03 n
1.00E-02 I V 1 Dibromobenzene, 1,4-106-37-6 7.8E+02 n 1.2E+04 n 1.3E+02 n 1.2E-01 n
8.40E-02 I 2.00E-02 I V 1 8.02E+02 Dibromochloromethane 124-48-1 8.3E+00 c 3.9E+01 c 8.7E-01 c 8.0E+01(G)2.3E-04 c 2.1E-02
2.00E+00 I 6.00E-04 I 9.00E-03 I 9.00E-03 I V 1 1.34E+03 Dibromoethane, 1,2-106-93-4 3.6E-02 c 1.6E-01 c 4.7E-03 c 2.0E-02 c 7.5E-03 c 5.0E-02 2.1E-06 c 1.4E-05
4.00E-03 X V 1 2.82E+03 Dibromomethane (Methylene Bromide)74-95-3 2.4E+01 n 9.9E+01 n 4.2E+00 n 1.8E+01 n 8.3E+00 n 2.1E-03 n
3.00E-04 P 1 0.1 Dibutyltin Compounds E1790661 1.9E+01 n 2.5E+02 n 6.0E+00 n
3.00E-02 I 1 0.1 Dicamba 1918-00-9 1.9E+03 n 2.5E+04 n 5.7E+02 n 1.5E-01 n
1 0.1 Dichloramine 3400-09-7 4.0E+03(G)
4.20E-03 P V 1 5.54E+02 Dichloro-2-butene, 1,4-764-41-0 2.1E-03 c 9.4E-03 c 6.7E-04 c 2.9E-03 c 1.3E-03 c 6.6E-07 c
4.20E-03 P V 1 5.19E+02 Dichloro-2-butene, cis-1,4-1476-11-5 7.4E-03 c 3.2E-02 c 6.7E-04 c 2.9E-03 c 1.3E-03 c 6.2E-07 c
4.20E-03 P V 1 7.60E+02 Dichloro-2-butene, trans-1,4-110-57-6 7.4E-03 c 3.2E-02 c 6.7E-04 c 2.9E-03 c 1.3E-03 c 6.2E-07 c
5.00E-02 I 4.00E-03 I 1 0.1 Dichloroacetic Acid 79-43-6 1.1E+01 c*4.6E+01 c*1.5E+00 c*6.0E+01(G)3.1E-04 c*1.2E-02
9.00E-02 I 2.00E-01 H V 1 3.76E+02 Dichlorobenzene, 1,2-95-50-1 1.8E+03 ns 9.3E+03 ns 2.1E+02 n 8.8E+02 n 3.0E+02 n 6.0E+02 3.0E-01 n 5.8E-01
5.40E-03 C 1.10E-05 C 7.00E-02 A 8.00E-01 I V 1 Dichlorobenzene, 1,4-106-46-7 2.6E+00 c 1.1E+01 c 2.6E-01 c 1.1E+00 c 4.8E-01 c 7.5E+01 4.6E-04 c 7.2E-02
4.50E-01 I 3.40E-04 C 1 0.1 Dichlorobenzidine, 3,3'-91-94-1 1.2E+00 c 5.1E+00 c 8.3E-03 c 3.6E-02 c 1.3E-01 c 8.2E-04 c
9.00E-03 X 1 0.1 Dichlorobenzophenone, 4,4'-90-98-2 5.7E+02 n 7.4E+03 n 7.8E+01 n 4.7E-01 n
2.00E-01 I 1.00E-01 X V 1 8.45E+02 Dichlorodifluoromethane 75-71-8 8.7E+01 n 3.7E+02 n 1.0E+02 n 4.4E+02 n 2.0E+02 n 3.0E-01 n
2.40E-01 I 6.90E-05 C 5.00E-04 A 1 0.1 Dichlorodiphenyldichloroethane, p,p'- (DDD)72-54-8 2.3E+00 c*9.6E+00 c*4.1E-02 c 1.8E-01 c 3.2E-02 c*7.5E-03 c*
3.40E-01 I 9.70E-05 C 5.00E-04 A V 1 Dichlorodiphenyldichloroethylene, p,p'- (DDE)72-55-9 2.0E+00 c*9.3E+00 c*2.9E-02 c 1.3E-01 c 4.6E-02 c 1.1E-02 c
3.40E-01 I 9.70E-05 I 5.00E-04 I 1 0.03 Dichlorodiphenyltrichloroethane, p,p'- (DDT)50-29-3 1.9E+00 c*8.5E+00 c*2.9E-02 c 1.3E-01 c 2.3E-01 c*7.7E-02 c*
5.70E-03 C 1.60E-06 C 2.00E-01 P V 1 1.69E+03 Dichloroethane, 1,1-75-34-3 3.6E+00 c 1.6E+01 c 1.8E+00 c 7.7E+00 c 2.8E+00 c 7.8E-04 c
9.10E-02 I 2.60E-05 I 6.00E-03 X 7.00E-03 P V 1 2.98E+03 Dichloroethane, 1,2-107-06-2 4.6E-01 c*2.0E+00 c*1.1E-01 c*4.7E-01 c*1.7E-01 c*5.0E+00 4.8E-05 c*1.4E-03
5.00E-02 I 2.00E-01 I V 1 1.19E+03 Dichloroethylene, 1,1-75-35-4 2.3E+02 n 1.0E+03 n 2.1E+02 n 8.8E+02 n 2.8E+02 n 7.0E+00 1.0E-01 n 2.5E-03
2.00E-03 I 4.00E-02 X V 1 2.37E+03 Dichloroethylene, cis-1,2-156-59-2 6.3E+01 n 3.7E+02 n 4.2E+01 n 1.8E+02 n 2.5E+01 n 7.0E+01 7.4E-03 n 2.1E-02
2.00E-02 I 4.00E-02 X V 1 1.85E+03 Dichloroethylene, trans-1,2-156-60-5 7.0E+01 n 3.0E+02 n 4.2E+01 n 1.8E+02 n 6.8E+01 n 1.0E+02 2.1E-02 n 3.1E-02
3.00E-03 I 1 0.1 Dichlorophenol, 2,4-120-83-2 1.9E+02 n 2.5E+03 n 4.6E+01 n 2.3E-02 n
1.00E-02 I 1 0.05 Dichlorophenoxy Acetic Acid, 2,4-94-75-7 7.0E+02 n 9.6E+03 n 1.7E+02 n 7.0E+01 4.5E-02 n 1.8E-02
3.70E-02 P 3.70E-06 P 4.00E-02 P 4.00E-03 I V 1 1.36E+03 Dichloropropane, 1,2-78-87-5 2.5E+00 c**1.1E+01 c**7.6E-01 c**3.3E+00 c**8.5E-01 c**5.0E+00 2.8E-04 c**1.7E-03
2.00E-02 P V 1 1.49E+03 Dichloropropane, 1,3-142-28-9 1.6E+03 ns 2.3E+04 ns 3.7E+02 n 1.3E-01 n
3.00E-03 I 1 0.1 Dichloropropanol, 2,3-616-23-9 1.9E+02 n 2.5E+03 n 5.9E+01 n 1.3E-02 n
1.00E-01 I 4.00E-06 I 3.00E-02 I 2.00E-02 I V 1 1.57E+03 Dichloropropene, 1,3-542-75-6 1.8E+00 c*8.2E+00 c*7.0E-01 c*3.1E+00 c*4.7E-01 c*1.7E-04 c*
2.90E-01 I 8.30E-05 C 5.00E-04 I 5.00E-04 I 1 0.1 Dichlorvos 62-73-7 1.9E+00 c*7.9E+00 c*3.4E-02 c*1.5E-01 c*2.6E-01 c*8.1E-05 c*
3.00E-05 O 1 0.1 Dicrotophos 141-66-2 1.9E+00 n 2.5E+01 n 6.0E-01 n 1.4E-04 n
8.00E-02 P 3.00E-04 X V 1 2.56E+02 Dicyclopentadiene 77-73-6 1.3E+00 n 5.4E+00 n 3.1E-01 n 1.3E+00 n 6.3E-01 n 2.2E-03 n
1.60E+01 I 4.60E-03 I 5.00E-05 I 1 0.1 Dieldrin 60-57-1 3.4E-02 c*1.4E-01 c 6.1E-04 c 2.7E-03 c 1.8E-03 c 7.1E-05 c
3.00E-04 C 5.00E-03 I 1 0.1 Diesel Engine Exhaust E17136615 9.4E-03 c 4.1E-02 c
2.00E-03 P 2.00E-04 P 1 0.1 Diethanolamine 111-42-2 1.3E+02 n 1.6E+03 n 2.1E-01 n 8.8E-01 n 4.0E+01 n 8.1E-03 n
3.00E-02 P 1.00E-04 P 1 0.1 Diethylene Glycol Monobutyl Ether 112-34-5 1.9E+03 n 2.4E+04 n 1.0E-01 n 4.4E-01 n 6.0E+02 n 1.3E-01 n
6.00E-02 P 3.00E-04 P 1 0.1 Diethylene Glycol Monoethyl Ether 111-90-0 3.8E+03 n 4.8E+04 n 3.1E-01 n 1.3E+00 n 1.2E+03 n 2.4E-01 n
1.00E-03 P V 1 1.12E+05 Diethylformamide 617-84-5 7.8E+01 n 1.2E+03 n 2.0E+01 n 4.1E-03 n
3.50E+02 C 1.00E-01 C 1 0.1 Diethylstilbestrol 56-53-1 1.6E-03 c 6.6E-03 c 2.8E-05 c 1.2E-04 c 5.1E-05 c 2.8E-05 c
8.30E-02 O 1 0.1 Difenzoquat 43222-48-6 5.2E+03 n 6.8E+04 n 1.7E+03 n 2.6E+02 n
2.00E-02 I 1 0.1 Diflubenzuron 35367-38-5 1.3E+03 n 1.6E+04 n 2.9E+02 n 3.3E-01 n
4.00E+01 I V 1 1.43E+03 Difluoroethane, 1,1-75-37-6 4.8E+04 ns 2.0E+05 nms 4.2E+04 n 1.8E+05 n 8.3E+04 n 2.8E+01 n
3.00E+01 X V 1 6.91E+02 Difluoropropane, 2,2-420-45-1 2.4E+04 ns 1.0E+05 ns 3.1E+04 n 1.3E+05 n 6.3E+04 n 1.4E+02 n
Page 3 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
4.40E-02 C 1.30E-05 C V 1 Dihydrosafrole 94-58-6 9.9E+00 c 4.5E+01 c 2.2E-01 c 9.4E-01 c 3.0E-01 c 1.9E-04 c
7.00E-01 P V 1 2.26E+03 Diisopropyl Ether 108-20-3 2.2E+03 n 9.4E+03 ns 7.3E+02 n 3.1E+03 n 1.5E+03 n 3.7E-01 n
8.00E-02 I V 1 5.30E+02 Diisopropyl Methylphosphonate 1445-75-6 6.3E+03 ns 9.3E+04 ns 1.6E+03 n 4.5E-01 n
2.18E-02 O 1 0.1 Dimethipin 55290-64-7 1.4E+03 n 1.8E+04 n 4.4E+02 n 9.6E-02 n
2.20E-03 O 1 0.1 Dimethoate 60-51-5 1.4E+02 n 1.8E+03 n 4.4E+01 n 9.9E-03 n
1.60E+00 P 1 0.1 Dimethoxybenzidine, 3,3'-119-90-4 3.4E-01 c 1.4E+00 c 4.7E-02 c 5.8E-05 c
1.70E-03 P 6.00E-02 P 1 0.1 Dimethyl methylphosphonate 756-79-6 3.2E+02 c*1.4E+03 c*4.6E+01 c*9.6E-03 c*
4.60E+00 C 1.30E-03 C 1 0.1 Dimethylamino azobenzene [p-]60-11-7 1.2E-01 c 5.0E-01 c 2.2E-03 c 9.4E-03 c 5.0E-03 c 2.1E-05 c
5.80E-01 H 1 0.1 Dimethylaniline HCl, 2,4-21436-96-4 9.4E-01 c 4.0E+00 c 1.3E-01 c 1.2E-04 c
2.00E-01 P 2.00E-03 X 1 0.1 Dimethylaniline, 2,4-95-68-1 2.7E+00 c*1.1E+01 c 3.7E-01 c 2.1E-04 c
2.70E-02 P 2.00E-03 I V 1 8.30E+02 Dimethylaniline, N,N-121-69-7 2.6E+01 c**1.2E+02 c*2.5E+00 c*9.0E-04 c*
1.10E+01 P 1 0.1 Dimethylbenzidine, 3,3'-119-93-7 4.9E-02 c 2.1E-01 c 6.5E-03 c 4.3E-05 c
1.00E-01 P 3.00E-02 I V 1 1.06E+05 Dimethylformamide 68-12-2 2.6E+03 n 1.5E+04 n 3.1E+01 n 1.3E+02 n 6.1E+01 n 1.2E-02 n
1.00E-04 X 2.00E-06 X V 1 1.72E+05 Dimethylhydrazine, 1,1-57-14-7 5.7E-02 n 2.4E-01 n 2.1E-03 n 8.8E-03 n 4.2E-03 n 9.3E-07 n
5.50E+02 C 1.60E-01 C V 1 1.89E+05 Dimethylhydrazine, 1,2-540-73-8 8.8E-04 c 4.1E-03 c 1.8E-05 c 7.7E-05 c 2.8E-05 c 6.5E-09 c
2.00E-02 I 1 0.1 Dimethylphenol, 2,4-105-67-9 1.3E+03 n 1.6E+04 n 3.6E+02 n 4.2E-01 n
6.00E-04 I 1 0.1 Dimethylphenol, 2,6-576-26-1 3.8E+01 n 4.9E+02 n 1.1E+01 n 1.3E-02 n
1.00E-03 I 1 0.1 Dimethylphenol, 3,4-95-65-8 6.3E+01 n 8.2E+02 n 1.8E+01 n 2.1E-02 n
4.50E-02 C 1.30E-05 C V 1 4.73E+02 Dimethylvinylchloride 513-37-1 1.1E+00 c 4.8E+00 c 2.2E-01 c 9.4E-01 c 3.3E-01 c 1.1E-04 c
8.00E-05 X 1 0.1 Dinitro-o-cresol, 4,6-534-52-1 5.1E+00 n 6.6E+01 n 1.5E+00 n 2.6E-03 n
2.00E-03 I 1 0.1 Dinitro-o-cyclohexyl Phenol, 4,6-131-89-5 1.3E+02 n 1.6E+03 n 2.3E+01 n 7.7E-01 n
4.00E-04 X 2.00E-03 X 1 0.1 Dinitroaniline, 3,5-618-87-1 2.5E+01 n 3.3E+02 n 2.1E+00 n 8.8E+00 n 7.7E+00 n 4.1E-03 n
1.00E-04 P 1 0.1 Dinitrobenzene, 1,2-528-29-0 6.3E+00 n 8.2E+01 n 1.9E+00 n 1.8E-03 n
1.00E-04 I 1 0.1 Dinitrobenzene, 1,3-99-65-0 6.3E+00 n 8.2E+01 n 2.0E+00 n 1.8E-03 n
1.00E-04 P 1 0.1 Dinitrobenzene, 1,4-100-25-4 6.3E+00 n 8.2E+01 n 2.0E+00 n 1.8E-03 n
2.00E-03 I 1 0.1 Dinitrophenol, 2,4-51-28-5 1.3E+02 n 1.6E+03 n 3.9E+01 n 4.4E-02 n
6.80E-01 I 1 0.1 Dinitrotoluene Mixture, 2,4/2,6-E1615210 8.0E-01 c 3.4E+00 c 1.1E-01 c 1.5E-04 c
3.10E-01 C 8.90E-05 C 2.00E-03 I 1 0.102 Dinitrotoluene, 2,4-121-14-2 1.7E+00 c*7.4E+00 c 3.2E-02 c 1.4E-01 c 2.4E-01 c 3.2E-04 c
1.50E+00 P 3.00E-04 X 1 0.099 Dinitrotoluene, 2,6-606-20-2 3.6E-01 c*1.5E+00 c 4.9E-02 c 6.7E-05 c
1.00E-04 X 1 0.006 Dinitrotoluene, 2-Amino-4,6-35572-78-2 7.7E+00 n 1.1E+02 n 1.9E+00 n 1.5E-03 n
1.00E-04 X 1 0.009 Dinitrotoluene, 4-Amino-2,6-19406-51-0 7.7E+00 n 1.1E+02 n 1.9E+00 n 1.5E-03 n
4.50E-01 X 9.00E-04 X 1 0.1 Dinitrotoluene, Technical grade 25321-14-6 1.2E+00 c*5.1E+00 c 1.0E-01 c 1.4E-04 c
1.00E-03 I 1 0.1 Dinoseb 88-85-7 6.3E+01 n 8.2E+02 n 1.5E+01 n 7.0E+00 1.3E-01 n 6.2E-02
1.00E-01 I 5.00E-06 I 3.00E-02 I 3.00E-02 I V 1 1.16E+05 Dioxane, 1,4-123-91-1 5.3E+00 c 2.4E+01 c 5.6E-01 c*2.5E+00 c*4.6E-01 c 9.4E-05 c
Dioxins
6.20E+03 I 1.30E+00 I 1 0.03 ~Hexachlorodibenzo-p-dioxin, Mixture 34465-46-8 1.0E-04 c 4.7E-04 c 2.2E-06 c 9.4E-06 c 1.3E-05 c 1.7E-05 c
1.30E+05 C 3.80E+01 C 7.00E-10 I 4.00E-08 C V 1 0.03 ~TCDD, 2,3,7,8-1746-01-6 4.8E-06 c*2.2E-05 c*7.4E-08 c 3.2E-07 c 1.2E-07 c 3.0E-05 5.9E-08 c 1.5E-05
3.00E-02 I 1 0.1 Diphenamid 957-51-7 1.9E+03 n 2.5E+04 n 5.3E+02 n 5.2E+00 n
4.00E-04 X V 1 Diphenyl Ether 101-84-8 3.4E+01 n 1.4E+02 n 4.2E-01 n 1.8E+00 n 8.3E-01 n 3.4E-03 n
8.00E-04 X 1 0.1 Diphenyl Sulfone 127-63-9 5.1E+01 n 6.6E+02 n 1.5E+01 n 3.6E-02 n
1.00E-01 O 1 0.1 Diphenylamine 122-39-4 6.3E+03 n 8.2E+04 n 1.3E+03 n 2.3E+00 n
8.00E-01 I 2.20E-04 I 1 0.1 Diphenylhydrazine, 1,2-122-66-7 6.8E-01 c 2.9E+00 c 1.3E-02 c 5.6E-02 c 7.8E-02 c 2.5E-04 c
2.20E-03 I 1 0.1 Diquat 2764-72-9 1.4E+02 n 1.8E+03 n 4.0E+01 n 2.0E+01 3.3E-01 n 1.7E-01
7.40E+00 C 2.10E-03 C 1 0.1 Direct Black 38 1937-37-7 7.3E-02 c 3.1E-01 c 1.3E-03 c 5.8E-03 c 1.1E-02 c 5.1E+00 c
7.40E+00 C 2.10E-03 C 1 0.1 Direct Blue 6 2602-46-2 7.3E-02 c 3.1E-01 c 1.3E-03 c 5.8E-03 c 1.1E-02 c 1.7E+01 c
6.70E+00 C 1.90E-03 C 1 0.1 Direct Brown 95 16071-86-6 8.1E-02 c 3.4E-01 c 1.5E-03 c 6.5E-03 c 1.2E-02 c 1.6E-01 c
4.00E-05 I 1 0.1 Disulfoton 298-04-4 2.5E+00 n 3.3E+01 n 5.0E-01 n 9.4E-04 n
1.00E-02 I V 1 Dithiane, 1,4-505-29-3 7.8E+02 n 1.2E+04 n 2.0E+02 n 9.7E-02 n
2.00E-03 I 1 0.1 Diuron 330-54-1 1.3E+02 n 1.6E+03 n 3.6E+01 n 1.5E-02 n
2.00E-02 O 1 0.1 Dodine 2439-10-3 1.3E+03 n 1.6E+04 n 4.0E+02 n 2.1E+00 n
5.00E-02 O V 1 EPTC 759-94-4 3.9E+03 n 5.8E+04 n 7.5E+02 n 4.0E-01 n
6.00E-03 I V 1 Endosulfan 115-29-7 4.7E+02 n 7.0E+03 n 1.0E+02 n 1.4E+00 n
6.00E-03 P 1 0.1 Endosulfan Sulfate 1031-07-8 3.8E+02 n 4.9E+03 n 1.1E+02 n 2.1E+00 n
2.00E-02 I 1 0.1 Endothall 145-73-3 1.3E+03 n 1.6E+04 n 3.8E+02 n 1.0E+02 9.1E-02 n 2.4E-02
3.00E-04 I 1 0.1 Endrin 72-20-8 1.9E+01 n 2.5E+02 n 2.3E+00 n 2.0E+00 9.2E-02 n 8.1E-02
9.90E-03 I 1.20E-06 I 6.00E-03 P 1.00E-03 I V 1 1.05E+04 Epichlorohydrin 106-89-8 1.9E+01 n 8.2E+01 n 1.0E+00 n 4.4E+00 n 2.0E+00 n 4.5E-04 n
2.00E-02 I V 1 1.53E+04 Epoxybutane, 1,2-106-88-7 1.6E+02 n 6.7E+02 n 2.1E+01 n 8.8E+01 n 4.2E+01 n 9.2E-03 n
4.00E-02 P 1 0.1 Ethanol, 2-(2-methoxyethoxy)-111-77-3 2.5E+03 n 3.3E+04 n 8.0E+02 n 1.6E-01 n
5.00E-03 I 1 0.1 Ethephon 16672-87-0 3.2E+02 n 4.1E+03 n 1.0E+02 n 2.1E-02 n
5.00E-04 I 1 0.1 Ethion 563-12-2 3.2E+01 n 4.1E+02 n 4.3E+00 n 8.5E-03 n
1.00E-01 P 6.00E-02 P V 1 2.38E+04 Ethoxyethanol Acetate, 2-111-15-9 2.6E+03 n 1.4E+04 n 6.3E+01 n 2.6E+02 n 1.2E+02 n 2.5E-02 n
9.00E-02 P 4.00E-02 P V 1 1.06E+05 Ethoxyethanol, 2-110-80-5 2.6E+03 n 1.5E+04 n 4.2E+01 n 1.8E+02 n 8.0E+01 n 1.6E-02 n
7.00E-01 P 7.00E-02 P V 1 1.08E+04 Ethyl Acetate 141-78-6 6.2E+02 n 2.6E+03 n 7.3E+01 n 3.1E+02 n 1.4E+02 n 3.1E-02 n
5.00E-03 P 8.00E-03 P V 1 2.50E+03 Ethyl Acrylate 140-88-5 4.7E+01 n 2.1E+02 n 8.3E+00 n 3.5E+01 n 1.4E+01 n 3.2E-03 n
4.00E+00 P V 1 2.12E+03 Ethyl Chloride (Chloroethane)75-00-3 5.4E+03 ns 2.3E+04 ns 4.2E+03 n 1.8E+04 n 8.3E+03 n 2.4E+00 n
2.00E-01 I V 1 1.01E+04 Ethyl Ether 60-29-7 1.6E+04 ns 2.3E+05 nms 3.9E+03 n 8.8E-01 n
3.00E-01 P V 1 1.10E+03 Ethyl Methacrylate 97-63-2 1.8E+03 ns 7.6E+03 ns 3.1E+02 n 1.3E+03 n 6.3E+02 n 1.5E-01 n
8.00E-08 I 1.00E+00 I 4.00E+01 I V 1 2.87E+03 Ethyl Tertiary Butyl Ether (ETBE)637-92-3 1.3E+02 c 5.6E+02 c 3.5E+01 c 1.5E+02 c 7.0E+01 c 1.7E-02 c
1.00E-05 I 1 0.1 Ethyl-p-nitrophenyl Phosphonate 2104-64-5 6.3E-01 n 8.2E+00 n 8.9E-02 n 2.8E-03 n
1.10E-02 C 2.50E-06 C 5.00E-02 P 1.00E+00 I V 1 4.80E+02 Ethylbenzene 100-41-4 5.8E+00 c 2.5E+01 c 1.1E+00 c 4.9E+00 c 1.5E+00 c 7.0E+02 1.7E-03 c 7.8E-01
7.00E-02 P 1 0.1 Ethylene Cyanohydrin 109-78-4 4.4E+03 n 5.7E+04 n 1.4E+03 n 2.8E-01 n
9.00E-02 P V 1 1.89E+05 Ethylene Diamine 107-15-3 7.0E+03 n 1.1E+05 nm 1.8E+03 n 4.1E-01 n
8.00E-01 A 4.00E-01 C 1 0.1 Ethylene Glycol 107-21-1 5.1E+04 n 6.6E+05 nm 4.2E+02 n 1.8E+03 n 1.6E+04 n 3.2E+00 n
1.00E-01 I 1.60E+00 I 1 0.1 Ethylene Glycol Monobutyl Ether 111-76-2 6.3E+03 n 8.2E+04 n 1.7E+03 n 7.0E+03 n 2.0E+03 n 4.1E-01 n
3.10E-01 C 3.00E-03 I 3.00E-02 C V M 1 1.21E+05 Ethylene Oxide 75-21-8 2.0E-03 c 2.5E-02 c 3.4E-04 c 4.1E-03 c 6.7E-04 c 1.4E-07 c
4.50E-02 C 1.30E-05 C 8.00E-05 I 1 0.1 Ethylene Thiourea 96-45-7 5.1E+00 n 5.1E+01 c**2.2E-01 c 9.4E-01 c 1.6E+00 n 3.6E-04 n
6.50E+01 C 1.90E-02 C V 1 1.54E+05 Ethyleneimine 151-56-4 2.7E-03 c 1.2E-02 c 1.5E-04 c 6.5E-04 c 2.4E-04 c 5.2E-08 c
3.00E+00 I 1 0.1 Ethylphthalyl Ethyl Glycolate 84-72-0 1.9E+05 nm 2.5E+06 nm 5.8E+04 n 1.3E+02 n
2.50E-04 I 1 0.1 Fenamiphos 22224-92-6 1.6E+01 n 2.1E+02 n 4.4E+00 n 4.3E-03 n
2.50E-02 I 1 0.1 Fenpropathrin 39515-41-8 1.6E+03 n 2.1E+04 n 6.4E+01 n 2.9E+00 n
2.50E-02 I 1 0.1 Fenvalerate 51630-58-1 1.6E+03 n 2.1E+04 n 5.0E+02 n 3.2E+02 n
1.30E-02 I 1 0.1 Fluometuron 2164-17-2 8.2E+02 n 1.1E+04 n 2.4E+02 n 1.9E-01 n
4.00E-02 C 1.30E-02 C 1 Fluoride 16984-48-8 3.1E+03 n 4.7E+04 n 1.4E+01 n 5.7E+01 n 8.0E+02 n 4.0E+03 1.2E+02 n 6.0E+02
6.00E-02 I 1.30E-02 C 1 Fluorine (Soluble Fluoride)7782-41-4 4.7E+03 n 7.0E+04 n 1.4E+01 n 5.7E+01 n 1.2E+03 n 4.0E+03 1.8E+02 n 6.0E+02
Page 4 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
8.00E-02 I 1 0.1 Fluridone 59756-60-4 5.1E+03 n 6.6E+04 n 1.4E+03 n 1.6E+02 n
4.00E-02 O 1 0.1 Flurprimidol 56425-91-3 2.5E+03 n 3.3E+04 n 6.9E+02 n 3.1E+00 n
2.00E-03 O 1 0.1 Flusilazole 85509-19-9 1.3E+02 n 1.6E+03 n 3.1E+01 n 5.1E+00 n
5.00E-01 O 1 0.1 Flutolanil 66332-96-5 3.2E+04 n 4.1E+05 nm 7.9E+03 n 4.2E+01 n
1.00E-02 I 1 0.1 Fluvalinate 69409-94-5 6.3E+02 n 8.2E+03 n 2.0E+02 n 2.9E+02 n
9.00E-02 O 1 0.1 Folpet 133-07-3 5.7E+03 n 7.4E+04 n 1.6E+03 n 3.9E-01 n
1.00E-02 O 1 0.1 Fomesafen 72178-02-0 6.3E+02 n 8.2E+03 n 1.9E+02 n 6.3E-01 n
2.00E-03 I 1 0.1 Fonofos 944-22-9 1.3E+02 n 1.6E+03 n 2.4E+01 n 4.7E-02 n
2.10E-02 C 1.30E-05 I 2.00E-01 I 9.82E-03 A V 1 4.24E+04 Formaldehyde 50-00-0 1.1E+01 c*5.0E+01 c*2.2E-01 c*9.4E-01 c*3.9E-01 c*7.8E-05 c*
9.00E-01 P 3.00E-04 X V 1 1.06E+05 Formic Acid 64-18-6 2.9E+01 n 1.2E+02 n 3.1E-01 n 1.3E+00 n 6.3E-01 n 1.3E-04 n
2.50E+00 O 1 0.1 Fosetyl-AL 39148-24-8 1.6E+05 nm 2.1E+06 nm 5.0E+04 n 6.6E+02 n
Furans
1.00E-03 X V 1 ~Dibenzofuran 132-64-9 7.8E+01 n 1.2E+03 n 7.9E+00 n 1.5E-01 n
1.00E-03 I V 1 6.22E+03 ~Furan 110-00-9 7.8E+01 n 1.2E+03 n 1.9E+01 n 7.3E-03 n
9.00E-01 I 2.00E+00 I V 1 1.65E+05 ~Tetrahydrofuran 109-99-9 1.8E+04 n 9.5E+04 n 2.1E+03 n 8.8E+03 n 3.4E+03 n 7.5E-01 n
3.80E+00 H 1 0.1 Furazolidone 67-45-8 1.4E-01 c 6.0E-01 c 2.0E-02 c 3.9E-05 c
3.00E-03 I 5.00E-02 H V 1 1.01E+04 Furfural 98-01-1 2.1E+02 n 2.6E+03 n 5.2E+01 n 2.2E+02 n 3.8E+01 n 8.1E-03 n
1.50E+00 C 4.30E-04 C 1 0.1 Furium 531-82-8 3.6E-01 c 1.5E+00 c 6.5E-03 c 2.9E-02 c 5.1E-02 c 6.8E-05 c
3.00E-02 I 8.60E-06 C 1 0.1 Furmecyclox 60568-05-0 1.8E+01 c 7.7E+01 c 3.3E-01 c 1.4E+00 c 1.1E+00 c 1.2E-03 c
6.00E-03 O 1 0.1 Glufosinate, Ammonium 77182-82-2 3.8E+02 n 4.9E+03 n 1.2E+02 n 2.6E-02 n
1.00E-01 A 8.00E-05 C 1 0.1 Glutaraldehyde 111-30-8 6.0E+03 n 7.0E+04 n 8.3E-02 n 3.5E-01 n 2.0E+03 n 4.0E-01 n
4.00E-04 I 1.00E-03 X V 1 1.06E+05 Glycidaldehyde 765-34-4 2.3E+01 n 2.1E+02 n 1.0E+00 n 4.4E+00 n 1.7E+00 n 3.3E-04 n
1.00E-01 I 1 0.1 Glyphosate 1071-83-6 6.3E+03 n 8.2E+04 n 2.0E+03 n 7.0E+02 8.8E+00 n 3.1E+00
1.00E-02 X V 1 Guanidine 113-00-8 7.8E+02 n 1.2E+04 n 2.0E+02 n 4.5E-02 n
2.00E-02 P 1 0.1 Guanidine Chloride 50-01-1 1.3E+03 n 1.6E+04 n 4.0E+02 n
3.00E-02 X 1 0.1 Guanidine Nitrate 506-93-4 1.9E+03 n 2.5E+04 n 6.0E+02 n 1.5E-01 n
5.00E-05 I 1 0.1 Haloxyfop, Methyl 69806-40-2 3.2E+00 n 4.1E+01 n 7.6E-01 n 8.4E-03 n
4.50E+00 I 1.30E-03 I 1.00E-04 A V 1 Heptachlor 76-44-8 1.3E-01 c*6.3E-01 c 2.2E-03 c 9.4E-03 c 1.4E-03 c 4.0E-01 1.2E-04 c 3.3E-02
9.10E+00 I 2.60E-03 I 1.30E-05 I V 1 Heptachlor Epoxide 1024-57-3 7.0E-02 c*3.3E-01 c*1.1E-03 c 4.7E-03 c 1.4E-03 c*2.0E-01 2.8E-05 c*4.1E-03
3.00E-03 X V 1 2.09E+02 Heptanal, n-111-71-7 2.4E+01 n 1.0E+02 n 3.1E+00 n 1.3E+01 n 6.3E+00 n 1.4E-03 n
3.00E-04 X 4.00E-01 P V 1 5.79E+01 Heptane, N-142-82-5 2.2E+01 n 2.9E+02 ns 4.2E+02 n 1.8E+03 n 6.0E+00 n 4.8E-02 n
2.00E-03 I V 1 Hexabromobenzene 87-82-1 1.6E+02 n 2.3E+03 n 4.0E+01 n 2.3E-01 n
2.00E-04 I 1 0.1 Hexabromodiphenyl ether, 2,2',4,4',5,5'- (BDE-153)68631-49-2 1.3E+01 n 1.6E+02 n 4.0E+00 n
1.60E+00 I 4.60E-04 I 1.00E-05 P V 1 Hexachlorobenzene 118-74-1 2.1E-01 c**9.6E-01 c*6.1E-03 c 2.7E-02 c 9.8E-03 c*1.0E+00 1.2E-04 c*1.3E-02
7.80E-02 I 2.20E-05 I 1.00E-03 P V 1 1.68E+01 Hexachlorobutadiene 87-68-3 1.2E+00 c*5.3E+00 c 1.3E-01 c 5.6E-01 c 1.4E-01 c*2.7E-04 c*
6.30E+00 I 1.80E-03 I 9.00E-04 A 1 0.1 Hexachlorocyclohexane, Alpha-319-84-6 8.6E-02 c 3.6E-01 c 1.6E-03 c 6.8E-03 c 7.2E-03 c 4.2E-05 c
1.80E+00 I 5.30E-04 I 1 0.1 Hexachlorocyclohexane, Beta-319-85-7 3.0E-01 c 1.3E+00 c 5.3E-03 c 2.3E-02 c 2.5E-02 c 1.5E-04 c
1.10E+00 C 3.10E-04 C 3.00E-04 I 1 0.04 Hexachlorocyclohexane, Gamma- (Lindane)58-89-9 5.7E-01 c*2.5E+00 c 9.1E-03 c 4.0E-02 c 4.2E-02 c*2.0E-01 2.4E-04 c*1.2E-03
1.80E+00 I 5.10E-04 I 1 0.1 Hexachlorocyclohexane, Technical 608-73-1 3.0E-01 c 1.3E+00 c 5.5E-03 c 2.4E-02 c 2.5E-02 c 1.5E-04 c
6.00E-03 I 2.00E-04 I V 1 1.57E+01 Hexachlorocyclopentadiene 77-47-4 1.8E+00 n 7.5E+00 n 2.1E-01 n 8.8E-01 n 4.1E-01 n 5.0E+01 1.3E-03 n 1.6E-01
4.00E-02 I 1.10E-05 C 7.00E-04 I 3.00E-02 I V 1 Hexachloroethane 67-72-1 1.8E+00 c*8.0E+00 c*2.6E-01 c 1.1E+00 c 3.3E-01 c*2.0E-04 c*
3.00E-04 I 1 0.1 Hexachlorophene 70-30-4 1.9E+01 n 2.5E+02 n 6.0E+00 n 8.0E+00 n
8.00E-02 I 4.00E-03 I 1 0.015 Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)121-82-4 8.3E+00 c*3.8E+01 c 9.7E-01 c*3.7E-04 c*
1.00E-05 I V 1 3.39E+03 Hexamethylene Diisocyanate, 1,6-822-06-0 3.1E+00 n 1.3E+01 n 1.0E-02 n 4.4E-02 n 2.1E-02 n 2.1E-04 n
4.00E-04 C 1 0.1 Hexamethylene diisocyanate biuret 4035-89-6 5.7E+05 nm 2.4E+06 nm 4.2E-01 n 1.8E+00 n
4.00E-04 C 1 0.1 Hexamethylene diisocyanate isocyanurate 3779-63-3 5.7E+05 nm 2.4E+06 nm 4.2E-01 n 1.8E+00 n
4.00E-04 P 1 0.1 Hexamethylphosphoramide 680-31-9 2.5E+01 n 3.3E+02 n 8.0E+00 n 1.8E-03 n
2.00E-07 X 6.00E-01 P V 1 1.41E+02 Hexane, Commercial E5241997 1.2E+01 c*5.1E+01 c*1.4E+01 c*6.1E+01 c*2.8E+01 c*2.0E-01 c*
7.00E-01 I V 1 1.41E+02 Hexane, N-110-54-3 6.1E+02 ns 2.5E+03 ns 7.3E+02 n 3.1E+03 n 1.5E+03 n 1.0E+01 n
2.00E+00 P 1 0.1 Hexanedioic Acid 124-04-9 1.3E+05 nm 1.6E+06 nm 4.0E+04 n 9.9E+00 n
9.50E-03 P 7.00E-02 P 4.00E-04 P V 1 2.74E+02 Hexanol, 1-,2-ethyl- (2-Ethyl-1-hexanol)104-76-7 1.5E+01 n 6.3E+01 n 4.2E-01 n 1.8E+00 n 8.3E-01 n 2.3E-04 n
5.00E-03 I 3.00E-02 I V 1 3.28E+03 Hexanone, 2-591-78-6 2.0E+02 n 1.3E+03 n 3.1E+01 n 1.3E+02 n 3.8E+01 n 8.8E-03 n
3.30E-02 I 1 0.1 Hexazinone 51235-04-2 2.1E+03 n 2.7E+04 n 6.4E+02 n 3.0E-01 n
2.50E-02 I 1 0.1 Hexythiazox 78587-05-0 1.6E+03 n 2.1E+04 n 1.1E+02 n 5.0E-01 n
1.70E-02 O 1 0.1 Hydramethylnon 67485-29-4 1.1E+03 n 1.4E+04 n 3.4E+02 n 1.2E+05 n
3.00E+00 I 4.90E-03 I 3.00E-05 P V 1 1.12E+05 Hydrazine 302-01-2 3.2E-02 c*1.4E-01 c*5.7E-04 c*2.5E-03 c*1.1E-03 c*2.2E-07 c*
3.00E+00 I 4.90E-03 I 1 Hydrazine Sulfate 10034-93-2 2.3E-01 c 1.1E+00 c 5.7E-04 c 2.5E-03 c 2.6E-02 c
2.00E-02 I V 1 Hydrogen Chloride 7647-01-0 2.8E+07 nm 1.2E+08 nm 2.1E+01 n 8.8E+01 n 4.2E+01 n
4.00E-02 C 1.40E-02 C V 1 Hydrogen Fluoride 7664-39-3 3.1E+03 n 4.7E+04 n 1.5E+01 n 6.1E+01 n 2.8E+01 n
2.00E-03 I V 1 Hydrogen Sulfide 7783-06-4 2.8E+06 nm 1.2E+07 nm 2.1E+00 n 8.8E+00 n 4.2E+00 n
6.00E-02 P 4.00E-02 P 1 0.1 Hydroquinone 123-31-9 9.0E+00 c 3.8E+01 c 1.3E+00 c 8.7E-04 c
6.11E-02 O 1.08E-01 O 1 0.1 Imazalil 35554-44-0 8.9E+00 c 3.8E+01 c 9.0E-01 c 1.5E-02 c
2.50E-01 I 1 0.1 Imazaquin 81335-37-7 1.6E+04 n 2.1E+05 nm 4.9E+03 n 2.4E+01 n
2.50E+00 O 1 0.1 Imazethapyr 81335-77-5 1.6E+05 nm 2.1E+06 nm 4.7E+04 n 4.1E+01 n
1.00E-02 A 1 Iodine 7553-56-2 7.8E+02 n 1.2E+04 n 2.0E+02 n 1.2E+01 n
4.00E-02 I 1 0.1 Iprodione 36734-19-7 2.5E+03 n 3.3E+04 n 7.4E+02 n 2.2E-01 n
7.00E-01 P 1 Iron 7439-89-6 5.5E+04 n 8.2E+05 nm 1.4E+04 n 3.5E+02 n
3.00E-01 I 4.00E-01 X V 1 1.00E+04 Isobutyl Alcohol 78-83-1 7.8E+03 n 4.3E+04 ns 4.2E+02 n 1.8E+03 n 7.3E+02 n 1.5E-01 n
9.50E-04 I 2.00E-01 I 2.00E+00 C 1 0.1 Isophorone 78-59-1 5.7E+02 c*2.4E+03 c*2.1E+03 n 8.8E+03 n 7.8E+01 c*2.6E-02 c*
1.50E-02 I V 1 Isopropalin 33820-53-0 1.2E+03 n 1.8E+04 n 4.0E+01 n 9.2E-01 n
2.00E+00 P 2.00E-01 P V 1 1.09E+05 Isopropanol 67-63-0 5.6E+03 n 2.4E+04 n 2.1E+02 n 8.8E+02 n 4.1E+02 n 8.4E-02 n
1.00E-01 I 1 0.1 Isopropyl Methyl Phosphonic Acid 1832-54-8 6.3E+03 n 8.2E+04 n 2.0E+03 n 4.3E-01 n
5.00E-02 I 1 0.1 Isoxaben 82558-50-7 3.2E+03 n 4.1E+04 n 7.3E+02 n 2.0E+00 n
3.00E-01 A V 1 Jet propulsion fuel 7 (JP-7)E1737665 4.3E+08 nm 1.8E+09 nm 3.1E+02 n 1.3E+03 n 6.3E+02 n
8.00E-03 O 1 0.1 Lactofen 77501-63-4 5.1E+02 n 6.6E+03 n 1.0E+02 n 4.6E+00 n
2.00E-04 X 1 0.1 Lactonitrile 78-97-7 1.3E+01 n 1.6E+02 n 4.0E+00 n 8.1E-04 n
5.00E-05 P 1 Lanthanum 7439-91-0 3.9E+00 n 5.8E+01 n 1.0E+00 n
2.08E-05 P 1 0.1 Lanthanum Acetate Hydrate 100587-90-4 1.3E+00 n 1.7E+01 n 4.2E-01 n
1.87E-05 P 1 Lanthanum Chloride Heptahydrate 10025-84-0 1.5E+00 n 2.2E+01 n 3.7E-01 n
2.83E-05 P 1 Lanthanum Chloride, Anhydrous 10099-58-8 2.2E+00 n 3.3E+01 n 5.7E-01 n
1.60E-05 P 1 Lanthanum Nitrate Hexahydrate 10277-43-7 1.3E+00 n 1.9E+01 n 3.2E-01 n
Lead Compounds
8.50E-03 C 1.20E-05 C 1 ~Lead Phosphate 7446-27-7 8.2E+01 c 3.8E+02 c 2.3E-01 c 1.0E+00 c 9.1E+00 c
2.10E-01 C 8.00E-05 C 1 0.1 ~Lead acetate 301-04-2 2.6E+00 c 1.1E+01 c 3.5E-02 c 1.5E-01 c 3.7E-01 c 7.5E-05 c
Page 5 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
1 ~Lead and Compounds 7439-92-1 2.0E+02 G 8.0E+02 G 1.5E-01 G 1.5E+01 G 1.5E+01 1.4E+01
1 ~Lead and Compounds (with other sources of lead present, see Guidance)7439-92-1 1.0E+02 G
3.80E-02 C 1.10E-05 C 1 0.1 ~Lead subacetate 1335-32-6 1.4E+01 c 6.0E+01 c 2.6E-01 c 1.1E+00 c 2.1E+00 c 4.5E-04 c
1.00E-07 I V 1 2.43E+00 ~Tetraethyl Lead 78-00-2 7.8E-03 n 1.2E-01 n 1.3E-03 n 4.7E-06 n
5.00E-06 P V 1 3.83E+02 Lewisite 541-25-3 3.9E-01 n 5.8E+00 n 9.0E-02 n 3.8E-05 n
7.70E-03 O 1 0.1 Linuron 330-55-2 4.9E+02 n 6.3E+03 n 1.3E+02 n 1.1E-01 n
2.00E-03 P 1 Lithium 7439-93-2 1.6E+02 n 2.3E+03 n 4.0E+01 n 1.2E+01 n
5.00E-04 I 1 0.1 MCPA 94-74-6 3.2E+01 n 4.1E+02 n 7.5E+00 n 2.0E-03 n
4.40E-02 O 1 0.1 MCPB 94-81-5 2.8E+03 n 3.6E+04 n 6.5E+02 n 2.6E-01 n
1.00E-03 I 1 0.1 MCPP 93-65-2 6.3E+01 n 8.2E+02 n 1.6E+01 n 4.7E-03 n
2.00E-02 I 1 0.1 Malathion 121-75-5 1.3E+03 n 1.6E+04 n 3.9E+02 n 1.0E-01 n
1.00E-01 I 7.00E-04 C 1 0.1 Maleic Anhydride 108-31-6 6.3E+03 n 8.0E+04 n 7.3E-01 n 3.1E+00 n 1.9E+03 n 3.8E-01 n
5.00E-01 I 1 0.1 Maleic Hydrazide 123-33-1 3.2E+04 n 4.1E+05 nm 1.0E+04 n 2.1E+00 n
1.00E-04 P 1 0.1 Malononitrile 109-77-3 6.3E+00 n 8.2E+01 n 2.0E+00 n 4.1E-04 n
3.00E-02 H 1 0.1 Mancozeb 8018-01-7 1.9E+03 n 2.5E+04 n 5.4E+02 n 7.6E-01 n
5.00E-03 I 1 0.1 Maneb 12427-38-2 3.2E+02 n 4.1E+03 n 9.8E+01 n 1.4E-01 n
1.40E-01 I 5.00E-05 I 1 Manganese (Diet)7439-96-5 5.2E-02 n 2.2E-01 n
2.40E-02 G 5.00E-05 I 0.04 Manganese (Non-diet)7439-96-5 1.8E+03 n 2.6E+04 n 5.2E-02 n 2.2E-01 n 4.3E+02 n 2.8E+01 n
9.00E-05 H 1 0.1 Mephosfolan 950-10-7 5.7E+00 n 7.4E+01 n 1.8E+00 n 2.6E-03 n
3.00E-02 I 1 0.1 Mepiquat Chloride 24307-26-4 1.9E+03 n 2.5E+04 n 6.0E+02 n 2.0E-01 n
1.10E-02 P 4.00E-03 P 1 0.1 Mercaptobenzothiazole, 2-149-30-4 4.9E+01 c**2.1E+02 c*6.3E+00 c*1.8E-02 c*
Mercury Compounds
3.00E-04 I 3.00E-04 G 0.07 ~Mercuric Chloride (and other Mercury salts)7487-94-7 2.3E+01 n 3.5E+02 n 3.1E-01 n 1.3E+00 n 5.7E+00 n 2.0E+00
3.00E-04 I V 1 3.13E+00 ~Mercury (elemental)7439-97-6 1.1E+01 ns 4.6E+01 ns 3.1E-01 n 1.3E+00 n 6.3E-01 n 2.0E+00 3.3E-02 n 1.0E-01
1.00E-04 I 1 ~Methyl Mercury 22967-92-6 7.8E+00 n 1.2E+02 n 2.0E+00 n 1.4E+01 n
8.00E-05 I 1 0.1 ~Phenylmercuric Acetate 62-38-4 5.1E+00 n 6.6E+01 n 1.6E+00 n 5.0E-04 n
3.00E-05 I V 1 Merphos 150-50-5 2.3E+00 n 3.5E+01 n 6.0E-01 n 5.9E-02 n
6.00E-02 I 1 0.1 Metalaxyl 57837-19-1 3.8E+03 n 4.9E+04 n 1.2E+03 n 3.3E-01 n
1.00E-04 I 3.00E-02 P V 1 4.58E+03 Methacrylonitrile 126-98-7 7.5E+00 n 1.0E+02 n 3.1E+01 n 1.3E+02 n 1.9E+00 n 4.3E-04 n
5.00E-05 I 1 0.1 Methamidophos 10265-92-6 3.2E+00 n 4.1E+01 n 1.0E+00 n 2.1E-04 n
2.00E+00 I 2.00E+01 I V 1 1.06E+05 Methanol 67-56-1 1.2E+05 nms 1.2E+06 nms 2.1E+04 n 8.8E+04 n 2.0E+04 n 4.1E+00 n
1.50E-03 O 1 0.1 Methidathion 950-37-8 9.5E+01 n 1.2E+03 n 2.9E+01 n 7.1E-03 n
2.50E-02 I 1 0.1 Methomyl 16752-77-5 1.6E+03 n 2.1E+04 n 5.0E+02 n 1.1E-01 n
4.90E-02 C 1 0.1 Methoxy-5-nitroaniline, 2-99-59-2 1.1E+01 c 4.7E+01 c 1.5E+00 c 5.3E-04 c
5.00E-03 I 1 0.1 Methoxychlor 72-43-5 3.2E+02 n 4.1E+03 n 3.7E+01 n 4.0E+01 2.0E+00 n 2.2E+00
8.00E-03 P 1.00E-03 P V 1 1.15E+05 Methoxyethanol Acetate, 2-110-49-6 1.1E+02 n 5.1E+02 n 1.0E+00 n 4.4E+00 n 2.1E+00 n 4.2E-04 n
5.00E-03 P 7.00E-03 P V 1 1.06E+05 Methoxyethanol, 2-109-86-4 2.6E+02 n 2.0E+03 n 7.3E+00 n 3.1E+01 n 1.3E+01 n 2.6E-03 n
1.00E+00 X V 1 2.90E+04 Methyl Acetate 79-20-9 7.8E+04 ns 1.2E+06 nms 2.0E+04 n 4.1E+00 n
2.00E-02 P V 1 6.75E+03 Methyl Acrylate 96-33-3 1.5E+02 n 6.1E+02 n 2.1E+01 n 8.8E+01 n 4.2E+01 n 8.9E-03 n
6.00E-01 I 5.00E+00 I V 1 2.84E+04 Methyl Ethyl Ketone (2-Butanone)78-93-3 2.7E+04 n 1.9E+05 nms 5.2E+03 n 2.2E+04 n 5.6E+03 n 1.2E+00 n
1.00E-03 X 1.00E-03 P 2.00E-05 X V 1 1.80E+05 Methyl Hydrazine 60-34-4 1.4E-01 c**6.2E-01 c**2.8E-03 c**1.2E-02 c**5.6E-03 c**1.3E-06 c**
3.00E+00 I V 1 3.36E+03 Methyl Isobutyl Ketone (4-methyl-2-pentanone)108-10-1 3.3E+04 ns 1.4E+05 nms 3.1E+03 n 1.3E+04 n 6.3E+03 n 1.4E+00 n
1.00E-03 C V 1 1.01E+04 Methyl Isocyanate 624-83-9 4.6E+00 n 1.9E+01 n 1.0E+00 n 4.4E+00 n 2.1E+00 n 5.9E-04 n
1.40E+00 I 7.00E-01 I V 1 2.36E+03 Methyl Methacrylate 80-62-6 4.4E+03 ns 1.9E+04 ns 7.3E+02 n 3.1E+03 n 1.4E+03 n 3.0E-01 n
2.50E-04 I 1 0.1 Methyl Parathion 298-00-0 1.6E+01 n 2.1E+02 n 4.5E+00 n 7.4E-03 n
6.00E-02 X 1 0.1 Methyl Phosphonic Acid 993-13-5 3.8E+03 n 4.9E+04 n 1.2E+03 n 2.4E-01 n
6.00E-03 H 4.00E-02 H V 1 3.93E+02 Methyl Styrene (Mixed Isomers)25013-15-4 3.2E+02 n 2.6E+03 ns 4.2E+01 n 1.8E+02 n 2.3E+01 n 3.8E-02 n
9.90E-02 C 2.80E-05 C 1 0.1 Methyl methanesulfonate 66-27-3 5.5E+00 c 2.3E+01 c 1.0E-01 c 4.4E-01 c 7.9E-01 c 1.6E-04 c
1.80E-03 C 2.60E-07 C 3.00E+00 I V 1 8.87E+03 Methyl tert-Butyl Ether (MTBE)1634-04-4 4.7E+01 c 2.1E+02 c 1.1E+01 c 4.7E+01 c 1.4E+01 c 3.2E-03 c
3.00E-04 X 1 0.1 Methyl-1,4-benzenediamine dihydrochloride, 2-615-45-2 1.9E+01 n 2.5E+02 n 6.0E+00 n 3.6E-03 n
3.00E+00 X V 1 2.45E+03 Methyl-2-Pentanol, 4-108-11-2 5.4E+04 ns 2.3E+05 nms 3.1E+03 n 1.3E+04 n 6.3E+03 n 1.4E+00 n
9.00E-03 P 2.00E-02 X 1 0.1 Methyl-5-Nitroaniline, 2-99-55-8 6.0E+01 c*2.6E+02 c*8.2E+00 c*4.6E-03 c*
8.30E+00 C 2.40E-03 C 1 0.1 Methyl-N-nitro-N-nitrosoguanidine, N-70-25-7 6.5E-02 c 2.8E-01 c 1.2E-03 c 5.1E-03 c 9.4E-03 c 3.2E-06 c
1.30E-01 C 3.70E-05 C 1 0.1 Methylaniline Hydrochloride, 2-636-21-5 4.2E+00 c 1.8E+01 c 7.6E-02 c 3.3E-01 c 6.0E-01 c 2.6E-04 c
1.00E-02 A 1 0.1 Methylarsonic acid 124-58-3 6.3E+02 n 8.2E+03 n 2.0E+02 n 5.8E-02 n
2.00E-04 X 1 0.1 Methylbenzene,1-4-diamine monohydrochloride, 2-74612-12-7 1.3E+01 n 1.6E+02 n 4.0E+00 n
1.00E-01 X 3.00E-04 X 1 0.1 Methylbenzene-1,4-diamine sulfate, 2-615-50-9 5.4E+00 c**2.3E+01 c*7.8E-01 c**
2.20E+01 C 6.30E-03 C M 1 0.1 Methylcholanthrene, 3-56-49-5 5.5E-03 c 1.0E-01 c 1.6E-04 c 1.9E-03 c 1.1E-03 c 2.2E-03 c
9.50E-02 X V 1 6.76E+01 Methylcyclohexane 108-87-2 9.8E+01 ns 4.1E+02 ns 9.9E+01 n 4.2E+02 n 2.0E+02 n 4.4E-01 n
2.00E-03 I 1.00E-08 I 6.00E-03 I 6.00E-01 I V M 1 3.32E+03 Methylene Chloride 75-09-2 5.7E+01 c**1.0E+03 c**1.0E+02 c**1.2E+03 c**1.1E+01 c**5.0E+00 2.9E-03 c**1.3E-03
1.00E-01 P 4.30E-04 C 2.00E-03 P M 1 0.1 Methylene-bis(2-chloroaniline), 4,4'-101-14-4 1.2E+00 c 2.3E+01 c*2.4E-03 c 2.9E-02 c 1.6E-01 c 1.8E-03 c
4.60E-02 I 1.30E-05 C 1 0.1 Methylene-bis(N,N-dimethyl) Aniline, 4,4'-101-61-1 1.2E+01 c 5.0E+01 c 2.2E-01 c 9.4E-01 c 7.0E-01 c 3.9E-03 c
1.60E+00 C 4.60E-04 C 2.00E-02 C 1 0.1 Methylenebisbenzenamine, 4,4'-101-77-9 3.4E-01 c 1.4E+00 c 6.1E-03 c 2.7E-02 c 4.7E-02 c 2.1E-04 c
6.00E-04 I 1 0.1 Methylenediphenyl Diisocyanate 101-68-8 8.5E+05 nm 3.6E+06 nm 6.3E-01 n 2.6E+00 n
7.00E-02 H V 1 5.00E+02 Methylstyrene, Alpha-98-83-9 5.5E+03 ns 8.2E+04 ns 7.8E+02 n 1.2E+00 n
1.50E-01 I 1 0.1 Metolachlor 51218-45-2 9.5E+03 n 1.2E+05 nm 2.7E+03 n 3.2E+00 n
2.50E-02 I 1 0.1 Metribuzin 21087-64-9 1.6E+03 n 2.1E+04 n 4.9E+02 n 1.5E-01 n
2.50E-01 I 1 0.1 Metsulfuron-methyl 74223-64-6 1.6E+04 n 2.1E+05 nm 4.9E+03 n 1.9E+00 n
4.50E-06 X 1.00E-02 X 1.00E-01 P V 1 6.86E+00 Midrange Aliphatic Hydrocarbon Streams E1790669 6.5E-01 c 2.8E+00 c 6.2E-01 c 2.7E+00 c 1.2E+00 c*1.8E-02 c*
3.00E+00 P V 1 3.42E-01 Mineral oils 8012-95-1 2.3E+05 nms 3.5E+06 nms 6.0E+04 n 2.4E+03 n
1.80E+01 C 5.10E-03 C 2.00E-04 I V 1 Mirex 2385-85-5 3.6E-02 c 1.7E-01 c 5.5E-04 c 2.4E-03 c 8.8E-04 c 6.3E-04 c
2.00E-03 I 1 0.1 Molinate 2212-67-1 1.3E+02 n 1.6E+03 n 3.0E+01 n 1.7E-02 n
5.00E-03 I 2.00E-03 A 1 Molybdenum 7439-98-7 3.9E+02 n 5.8E+03 n 2.1E+00 n 8.8E+00 n 1.0E+02 n 2.0E+00 n
1.00E-01 I 1 Monochloramine 10599-90-3 7.8E+03 n 1.2E+05 nm 2.0E+03 n 4.0E+03(G)
2.00E-03 P 1 0.1 Monomethylaniline 100-61-8 1.3E+02 n 1.6E+03 n 3.8E+01 n 1.4E-02 n
2.50E-02 I 1 0.1 Myclobutanil 88671-89-0 1.6E+03 n 2.1E+04 n 4.5E+02 n 5.6E+00 n
3.00E-04 X 1 0.1 N,N'-Diphenyl-1,4-benzenediamine 74-31-7 1.9E+01 n 2.5E+02 n 3.6E+00 n 3.7E-01 n
2.00E-03 I V 1 Naled 300-76-5 1.6E+02 n 2.3E+03 n 4.0E+01 n 1.8E-02 n
3.00E-02 X 1.00E-01 P V 1 Naphtha, High Flash Aromatic (HFAN)64742-95-6 2.3E+03 n 3.5E+04 n 1.0E+02 n 4.4E+02 n 1.5E+02 n
1.80E+00 C 0.00E+00 C 1 0.1 Naphthylamine, 2-91-59-8 3.0E-01 c 1.3E+00 c 3.9E-02 c 2.0E-04 c
1.20E-01 O 1 0.1 Napropamide 15299-99-7 7.6E+03 n 9.8E+04 n 2.0E+03 n 1.3E+01 n
2.60E-04 C 1.10E-02 C 1.40E-05 C 1 0.1 Nickel Acetate 373-02-4 6.7E+02 n 8.1E+03 n 1.1E-02 c**4.7E-02 c**2.2E+02 n 4.5E-02 n
2.60E-04 C 1.10E-02 C 1.40E-05 C 1 0.1 Nickel Carbonate 3333-67-3 6.7E+02 n 8.1E+03 n 1.1E-02 c**4.7E-02 c**2.2E+02 n
2.60E-04 C 1.10E-02 C 1.40E-05 C V 1 Nickel Carbonyl 13463-39-3 8.2E+02 n 1.1E+04 n 1.1E-02 c**4.7E-02 c**2.2E-02 c**
Page 6 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
2.60E-04 C 1.10E-02 C 1.40E-05 C 0.04 Nickel Hydroxide 12054-48-7 8.2E+02 n 1.1E+04 n 1.1E-02 c**4.7E-02 c**2.0E+02 n
2.60E-04 C 1.10E-02 C 2.00E-05 C 0.04 Nickel Oxide 1313-99-1 8.4E+02 n 1.2E+04 n 1.1E-02 c**4.7E-02 c**2.0E+02 n
2.40E-04 I 1.10E-02 C 1.40E-05 C 0.04 Nickel Refinery Dust E715532 8.2E+02 n 1.1E+04 n 1.2E-02 c**5.1E-02 c**2.2E+02 n 3.2E+01 n
2.60E-04 C 2.00E-02 I 1.00E-05 T 0.04 Nickel Soluble Salts 7440-02-0 1.4E+03 n 1.7E+04 n 1.0E-02 n 4.4E-02 n 3.9E+02 n 2.6E+01 n
1.70E+00 C 4.80E-04 I 1.10E-02 C 1.40E-05 C 0.04 Nickel Subsulfide 12035-72-2 4.1E-01 c 1.9E+00 c 5.8E-03 c**2.6E-02 c**4.5E-02 c
9.10E-01 C 2.60E-04 C 1.10E-02 C 1.40E-05 C 1 0.1 Nickelocene 1271-28-9 6.0E-01 c 2.5E+00 c 1.1E-02 c**4.7E-02 c**8.6E-02 c
1.60E+00 I 1 Nitrate (measured as nitrogen)14797-55-8 1.3E+05 nm 1.9E+06 nm 3.2E+04 n 1.0E+04
1 Nitrate + Nitrite (measured as nitrogen)E701177 1.0E+04
1.00E-01 I 1 Nitrite (measured as nitrogen)14797-65-0 7.8E+03 n 1.2E+05 nm 2.0E+03 n 1.0E+03
1.00E-02 X 5.00E-05 X 1 0.1 Nitroaniline, 2-88-74-4 6.3E+02 n 8.0E+03 n 5.2E-02 n 2.2E-01 n 1.9E+02 n 8.0E-02 n
2.00E-02 P 4.00E-03 P 6.00E-03 P 1 0.1 Nitroaniline, 4-100-01-6 2.7E+01 c**1.1E+02 c*6.3E+00 n 2.6E+01 n 3.8E+00 c*1.6E-03 c*
4.00E-05 I 2.00E-03 I 9.00E-03 I V 1 3.05E+03 Nitrobenzene 98-95-3 5.1E+00 c*2.2E+01 c*7.0E-02 c 3.1E-01 c 1.4E-01 c*9.2E-05 c*
3.00E+03 P 1 0.1 Nitrocellulose 9004-70-0 1.9E+08 nm 2.5E+09 nm 6.0E+07 n 1.3E+04 n
7.00E-02 H 1 0.1 Nitrofurantoin 67-20-9 4.4E+03 n 5.7E+04 n 1.4E+03 n 6.1E-01 n
1.30E+00 C 3.70E-04 C 1 0.1 Nitrofurazone 59-87-0 4.2E-01 c 1.8E+00 c 7.6E-03 c 3.3E-02 c 6.0E-02 c 5.4E-05 c
1.70E-02 P 1.00E-04 P 1 0.1 Nitroglycerin 55-63-0 6.3E+00 n 8.2E+01 n 2.0E+00 n 8.5E-04 n
1.00E-01 I 1 0.1 Nitroguanidine 556-88-7 6.3E+03 n 8.2E+04 n 2.0E+03 n 4.8E-01 n
8.80E-06 P 5.00E-03 P V 1 1.80E+04 Nitromethane 75-52-5 5.4E+00 c*2.4E+01 c*3.2E-01 c*1.4E+00 c*6.4E-01 c*1.4E-04 c*
5.80E-04 X 2.00E-02 I V 1 4.86E+03 Nitropropane, 2-79-46-9 6.4E-02 c 2.8E-01 c 4.8E-03 c 2.1E-02 c 9.7E-03 c 2.5E-06 c
2.70E+01 C 7.70E-03 C M 1 0.1 Nitroso-N-ethylurea, N-759-73-9 4.5E-03 c 8.5E-02 c 1.3E-04 c 1.6E-03 c 9.2E-04 c 2.2E-07 c
1.20E+02 C 3.40E-02 C M 1 0.1 Nitroso-N-methylurea, N-684-93-5 1.0E-03 c 1.9E-02 c 3.0E-05 c 3.6E-04 c 2.1E-04 c 4.6E-08 c
5.40E+00 I 1.60E-03 I V 1 Nitrosodibutylamine, N-924-16-3 9.9E-02 c 4.6E-01 c 1.8E-03 c 7.7E-03 c 2.7E-03 c 5.5E-06 c
2.80E+00 I 8.00E-04 C 1 0.1 Nitrosodiethanolamine, N-1116-54-7 1.9E-01 c 8.2E-01 c 3.5E-03 c 1.5E-02 c 2.8E-02 c 5.6E-06 c
1.50E+02 I 4.30E-02 I M 1 0.1 Nitrosodiethylamine, N-55-18-5 8.1E-04 c 1.5E-02 c 2.4E-05 c 2.9E-04 c 1.7E-04 c 6.1E-08 c
5.10E+01 I 1.40E-02 I 8.00E-06 P 4.00E-05 X V M 1 2.37E+05 Nitrosodimethylamine, N-62-75-9 2.0E-03 c 3.4E-02 c 7.2E-05 c 8.8E-04 c 1.1E-04 c 2.7E-08 c
4.90E-03 I 2.60E-06 C 1 0.1 Nitrosodiphenylamine, N-86-30-6 1.1E+02 c 4.7E+02 c 1.1E+00 c 4.7E+00 c 1.2E+01 c 6.7E-02 c
7.00E+00 I 2.00E-03 C 1 0.1 Nitrosodipropylamine, N-621-64-7 7.8E-02 c 3.3E-01 c 1.4E-03 c 6.1E-03 c 1.1E-02 c 8.1E-06 c
2.20E+01 I 6.30E-03 C V 1 1.08E+05 Nitrosomethylethylamine, N-10595-95-6 2.0E-02 c 9.1E-02 c 4.5E-04 c 1.9E-03 c 7.1E-04 c 2.0E-07 c
6.70E+00 C 1.90E-03 C 1 0.1 Nitrosomorpholine [N-]59-89-2 8.1E-02 c 3.4E-01 c 1.5E-03 c 6.5E-03 c 1.2E-02 c 2.8E-06 c
9.40E+00 C 2.70E-03 C 1 0.1 Nitrosopiperidine [N-]100-75-4 5.8E-02 c 2.4E-01 c 1.0E-03 c 4.5E-03 c 8.2E-03 c 4.4E-06 c
2.10E+00 I 6.10E-04 I 1 0.1 Nitrosopyrrolidine, N-930-55-2 2.6E-01 c 1.1E+00 c 4.6E-03 c 2.0E-02 c 3.7E-02 c 1.4E-05 c
1.00E-04 X 1 0.1 Nitrotoluene, m-99-08-1 6.3E+00 n 8.2E+01 n 1.7E+00 n 1.6E-03 n
2.20E-01 P 9.00E-04 P V 1 1.51E+03 Nitrotoluene, o-88-72-2 3.2E+00 c*1.5E+01 c*3.1E-01 c*3.0E-04 c*
1.60E-02 P 4.00E-03 P 1 0.1 Nitrotoluene, p-99-99-0 3.4E+01 c**1.4E+02 c*4.3E+00 c*4.0E-03 c*
3.00E-04 X 2.00E-02 P V 1 6.86E+00 Nonane, n-111-84-2 1.1E+01 ns 7.2E+01 ns 2.1E+01 n 8.8E+01 n 5.3E+00 n 7.5E-02 n
1.50E-03 O 1 0.1 Norflurazon 27314-13-2 9.5E+01 n 1.2E+03 n 2.9E+01 n 1.9E-01 n
3.00E-03 I 1 0.1 Octabromodiphenyl Ether 32536-52-0 1.9E+02 n 2.5E+03 n 6.0E+01 n 1.2E+01 n
5.00E-02 I 1 0.006 Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX)2691-41-0 3.9E+03 n 5.7E+04 n 1.0E+03 n 1.3E+00 n
2.00E-03 H 1 0.1 Octamethylpyrophosphoramide 152-16-9 1.3E+02 n 1.6E+03 n 4.0E+01 n 9.6E-03 n
7.79E-03 O 1.90E-01 O 1 0.1 Oryzalin 19044-88-3 7.0E+01 c 2.9E+02 c 7.9E+00 c 1.5E-02 c
5.00E-03 I 1 0.1 Oxadiazon 19666-30-9 3.2E+02 n 4.1E+03 n 4.7E+01 n 4.8E-01 n
2.50E-02 I 1 0.1 Oxamyl 23135-22-0 1.6E+03 n 2.1E+04 n 5.0E+02 n 2.0E+02 1.1E-01 n 4.4E-02
7.32E-02 O 4.00E-02 O 1 0.1 Oxyfluorfen 42874-03-3 7.4E+00 c 3.1E+01 c 5.4E-01 c 4.3E-02 c
1.30E-02 I 1 0.1 Paclobutrazol 76738-62-0 8.2E+02 n 1.1E+04 n 2.3E+02 n 4.6E-01 n
4.50E-03 I 1 0.1 Paraquat Dichloride 1910-42-5 2.8E+02 n 3.7E+03 n 9.0E+01 n 1.2E+00 n
6.00E-03 H 1 0.1 Parathion 56-38-2 3.8E+02 n 4.9E+03 n 8.6E+01 n 4.3E-01 n
5.00E-02 H V 1 Pebulate 1114-71-2 3.9E+03 n 5.8E+04 n 5.6E+02 n 4.5E-01 n
3.00E-01 O 1 0.1 Pendimethalin 40487-42-1 1.9E+04 n 2.5E+05 nm 1.4E+03 n 1.6E+01 n
2.00E-03 I V 1 3.12E-01 Pentabromodiphenyl Ether 32534-81-9 1.6E+02 ns 2.3E+03 ns 4.0E+01 n 1.7E+00 n
1.00E-04 I 1 0.1 Pentabromodiphenyl ether, 2,2',4,4',5- (BDE-99)60348-60-9 6.3E+00 n 8.2E+01 n 2.0E+00 n 8.7E-02 n
8.00E-04 I V 1 Pentachlorobenzene 608-93-5 6.3E+01 n 9.3E+02 n 3.2E+00 n 2.4E-02 n
9.00E-02 P V 1 4.57E+02 Pentachloroethane 76-01-7 7.7E+00 c 3.6E+01 c 6.5E-01 c 3.1E-04 c
2.60E-01 H 3.00E-03 I V 1 Pentachloronitrobenzene 82-68-8 2.7E+00 c*1.3E+01 c 1.2E-01 c 1.5E-03 c
4.00E-01 I 5.10E-06 C 5.00E-03 I 1 0.25 Pentachlorophenol 87-86-5 1.0E+00 c 4.0E+00 c 5.5E-01 c 2.4E+00 c 4.1E-02 c 1.0E+00 5.7E-05 c 1.4E-03
4.30E-03 X 9.00E-03 P 1 0.1 Pentaerythritol tetranitrate (PETN)78-11-5 1.3E+02 c**5.3E+02 c*1.7E+01 c**2.6E-02 c**
1.00E-04 X 1 0.1 Pentamethylphosphoramide (PMPA)10159-46-3 6.3E+00 n 8.2E+01 n 2.0E+00 n 4.1E-04 n
1.00E+00 P V 1 3.88E+02 Pentane, n-109-66-0 8.1E+02 ns 3.4E+03 ns 1.0E+03 n 4.4E+03 n 2.1E+03 n 1.0E+01 n
Per- and Polyfluoroalkyl Substances (PFAS)
3.00E-06 D 1 0.1 ~Ammonium perfluoro-2-methyl-3-oxahexanoate 62037-80-3 1.9E-01 n 2.5E+00 n 2.1E-02 n 2.2E-05 n
1.00E-03 I V 1 2.68E+02 ~Ammonium perfluorobutanoate 10495-86-0 7.8E+01 n 1.2E+03 ns 1.9E+01 n 6.8E-03 n
5.00E-04 I 1 0.1 ~Ammonium perfluorohexanoate 21615-47-4 3.2E+01 n 4.1E+02 n 7.2E+00 n 1.7E-03 n
2.93E+04 D 3.00E-08 D 1 0.1 ~Ammonium perfluorooctanoate 3825-26-1 1.9E-05 c 7.8E-05 c 2.7E-06 c 4.0E-08 c
3.00E-04 R V 1 ~Bis(trifluoromethylsulfonyl)amine (TFSI)82113-65-3 2.3E+01 n 3.5E+02 n 5.9E+00 n 1.9E-03 n
3.00E-06 D V 1 1.92E+06 ~Hexafluoropropylene oxide dimer acid (HFPO-DA)13252-13-6 2.3E-01 n 3.5E+00 n 1.5E-02 n 1.0E-02(G)1.5E-05 n 1.0E-05
3.00E-04 R V 1 ~Lithium bis[(trifluoromethyl)sulfonyl]azanide 90076-65-6 2.3E+01 n 3.5E+02 n 6.0E+00 n 1.9E-03 n
3.00E-04 P 1 0.1 ~Perfluorobutanesulfonate 45187-15-3 1.9E+01 n 2.5E+02 n 6.0E+00 n 3.0E-03 n
3.00E-04 P 1 0.1 ~Perfluorobutanesulfonic acid (PFBS)375-73-5 1.9E+01 n 2.5E+02 n 6.0E+00 n (G)3.0E-03 n
1.00E-03 I V 1 2.56E+03 ~Perfluorobutanoate 45048-62-2 7.8E+01 n 1.2E+03 n 1.8E+01 n 6.3E-03 n
1.00E-03 I V 1 2.57E+03 ~Perfluorobutanoic acid (PFBA)375-22-4 7.8E+01 n 1.2E+03 n 1.8E+01 n 6.5E-03 n
5.00E-05 N 1 0.1 ~Perfluorododecanoic acid (PFDoDA)307-55-1 3.2E+00 n 4.1E+01 n 1.0E+00 n 1.7E-01 n
2.00E-05 A 1 0.1 ~Perfluorohexanesulfonate 108427-53-8 1.3E+00 n 1.6E+01 n 3.9E-01 n 1.7E-04 n
2.00E-05 A 1 0.1 ~Perfluorohexanesulfonic acid (PFHxS)355-46-4 1.3E+00 n 1.6E+01 n 3.9E-01 n 1.0E-02(G)1.7E-04 n 4.2E-06
5.00E-04 I 1 0.1 ~Perfluorohexanoate 92612-52-7 3.2E+01 n 4.1E+02 n 6.1E+00 n 1.5E-03 n
5.00E-04 I 1 0.1 ~Perfluorohexanoic acid (PFHxA)307-24-4 3.2E+01 n 4.1E+02 n 9.9E+00 n 2.4E-03 n
3.00E-06 A 1 0.1 ~Perfluorononanoate 72007-68-2 1.9E-01 n 2.5E+00 n 5.9E-02 n 2.5E-04 n
3.00E-06 A 1 0.1 ~Perfluorononanoic acid (PFNA)375-95-1 1.9E-01 n 2.5E+00 n 5.9E-02 n 1.0E-02(G)2.5E-04 n 4.2E-05
4.00E-02 N 1 0.1 ~Perfluorooctadecanoic acid (PFODA)16517-11-6 2.5E+03 n 3.3E+04 n 8.0E+02 n 2.2E+02 n
3.95E+01 D 1.00E-07 D 1 0.1 ~Perfluorooctanesulfonate 45298-90-6 6.3E-03 n 5.8E-02 c**2.0E-03 c**1.5E-05 c**
3.95E+01 D 1.00E-07 D 1 0.1 ~Perfluorooctanesulfonic acid (PFOS)1763-23-1 6.3E-03 n 5.8E-02 c**2.0E-03 c**4.0E-03 1.5E-05 c**3.0E-05
2.93E+04 D 3.00E-08 D 1 0.1 ~Perfluorooctanoate 45285-51-6 1.9E-05 c 7.8E-05 c 2.7E-06 c 4.0E-08 c
2.93E+04 D 3.00E-08 D 1 0.1 ~Perfluorooctanoic acid (PFOA)335-67-1 1.9E-05 c 7.8E-05 c 2.7E-06 c 4.0E-03 4.0E-08 c 6.1E-05
5.00E-04 R V 1 1.36E+04 ~Perfluoropropanoic acid (PFPrA)422-64-0 3.9E+01 n 5.8E+02 n 9.8E+00 n 2.1E-03 n
1.00E-03 N 1 0.1 ~Perfluorotetradecanoic acid (PFTetDA)376-06-7 6.3E+01 n 8.2E+02 n 2.0E+01 n 9.4E+00 n
3.00E-04 N 1 0.1 ~Perfluoroundecanoic acid (PFUDA)2058-94-8 1.9E+01 n 2.5E+02 n 6.0E+00 n 4.5E-02 n
Page 7 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
2.00E-03 I V 1 9.61E+04 ~Potassium heptafluorobutanoate 2966-54-3 1.6E+02 n 2.3E+03 n 3.8E+01 n 1.3E-02 n
3.00E-04 P 1 0.1 ~Potassium perfluorobutanesulfonate 29420-49-3 1.9E+01 n 2.5E+02 n 6.0E+00 n 3.0E-03 n
3.95E+01 D 1.00E-07 D 1 0.1 ~Potassium perfluorooctanesulfonate 2795-39-3 6.3E-03 n 5.8E-02 c**2.0E-03 c**1.5E-05 c**
1.00E-03 I V 1 8.99E+04 ~Sodium perfluorobutanoate 2218-54-4 7.8E+01 n 1.2E+03 n 1.8E+01 n 6.4E-03 n
5.00E-04 I 1 0.1 ~Sodium perfluorohexanoate 2923-26-4 3.2E+01 n 4.1E+02 n 1.0E+01 n 2.4E-03 n
Perchlorates
7.00E-04 I 1 ~Ammonium Perchlorate 7790-98-9 5.5E+01 n 8.2E+02 n 1.4E+01 n
7.00E-04 I 1 ~Lithium Perchlorate 7791-03-9 5.5E+01 n 8.2E+02 n 1.4E+01 n
7.00E-04 I 1 ~Perchlorate and Perchlorate Salts 14797-73-0 5.5E+01 n 8.2E+02 n 1.4E+01 n 1.5E+01(G)
7.00E-04 I 1 ~Potassium Perchlorate 7778-74-7 5.5E+01 n 8.2E+02 n 1.4E+01 n
7.00E-04 I 1 ~Sodium Perchlorate 7601-89-0 5.5E+01 n 8.2E+02 n 1.4E+01 n
5.00E-02 I 1 0.1 Permethrin 52645-53-1 3.2E+03 n 4.1E+04 n 1.0E+03 n 2.4E+02 n
2.20E-03 C 6.30E-07 C 1 0.1 Phenacetin 62-44-2 2.5E+02 c 1.0E+03 c 4.5E+00 c 1.9E+01 c 3.4E+01 c 9.7E-03 c
2.40E-01 O 1 0.1 Phenmedipham 13684-63-4 1.5E+04 n 2.0E+05 nm 3.8E+03 n 2.1E+01 n
3.00E-01 I 2.00E-01 C 1 0.1 Phenol 108-95-2 1.9E+04 n 2.5E+05 nm 2.1E+02 n 8.8E+02 n 5.8E+03 n 3.3E+00 n
4.00E-03 I 1 0.1 Phenol, 2-(1-methylethoxy)-, methylcarbamate 114-26-1 2.5E+02 n 3.3E+03 n 7.8E+01 n 2.5E-02 n
5.00E-04 X 1 0.1 Phenothiazine 92-84-2 3.2E+01 n 4.1E+02 n 4.3E+00 n 1.4E-02 n
2.00E-04 X V 1 1.29E+02 Phenyl Isothiocyanate 103-72-0 1.6E+01 n 2.3E+02 ns 2.6E+00 n 1.7E-03 n
6.00E-03 I 1 0.1 Phenylenediamine, m-108-45-2 3.8E+02 n 4.9E+03 n 1.2E+02 n 3.2E-02 n
1.20E-01 P 4.00E-03 P 1 0.1 Phenylenediamine, o-95-54-5 4.5E+00 c*1.9E+01 c 6.5E-01 c 1.7E-04 c
1.00E-03 X 1 0.1 Phenylenediamine, p-106-50-3 6.3E+01 n 8.2E+02 n 2.0E+01 n 5.4E-03 n
1.94E-03 H 1 0.1 Phenylphenol, 2-90-43-7 2.8E+02 c 1.2E+03 c 3.0E+01 c 4.1E-01 c
2.00E-04 H 1 0.1 Phorate 298-02-2 1.3E+01 n 1.6E+02 n 3.0E+00 n 3.4E-03 n
3.00E-04 I V 1 1.61E+03 Phosgene 75-44-5 3.1E-01 n 1.3E+00 n 3.1E-01 n 1.3E+00 n 6.3E-01 n 1.6E-04 n
2.00E-02 I 1 0.1 Phosmet 732-11-6 1.3E+03 n 1.6E+04 n 3.7E+02 n 8.2E-02 n
Phosphates, Inorganic
2.93E+00 X 1 ~Aluminum metaphosphate 13776-88-0 2.3E+05 nm 3.4E+06 nm 5.9E+04 n
3.00E-01 X 1 ~Aluminum salts of inorganic phosphates E524680405 2.3E+04 n 3.5E+05 nm 6.0E+03 n
1.00E+00 P 1 ~Dipotassium phosphate 7758-11-4 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Disodium phosphate 7558-79-4 7.8E+04 n 1.2E+06 nm 2.0E+04 n
3.54E+00 X 1 ~Monoaluminum phosphate 13530-50-2 2.8E+05 nm 4.1E+06 nm 7.1E+04 n
1.00E+00 P 1 ~Monopotassium phosphate 7778-77-0 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Monosodium phosphate 7558-80-7 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.36E+00 X 1 0.1 ~Phosphoric acid, aluminum salt (1:1) [aluminum phosphate]7784-30-7 8.6E+04 n 1.1E+06 nm 2.7E+04 n
4.26E+00 X 1 ~Phosphoric acid, aluminum sodium salt (1:X:X) [sodium aluminum phosphate acidic (acidic SALP)]7785-88-8 3.3E+05 nm 5.0E+06 nm 8.5E+04 n
1.00E+00 P 1 ~Polyphosphoric acid 8017-16-1 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Potassium salts of inorganic phosphates E524680403 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Potassium tripolyphosphate 13845-36-8 7.8E+04 n 1.2E+06 nm 2.0E+04 n
4.99E+00 X 1 ~Sodium aluminum phosphate (anhydrous)10279-59-1 3.9E+05 nm 5.8E+06 nm 1.0E+05 n
3.52E+00 X 1 ~Sodium aluminum phosphate (tetrahydrate)10305-76-7 2.8E+05 nm 4.1E+06 nm 7.0E+04 n
1.00E+00 P 1 ~Sodium hexametaphosphate 10124-56-8 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Sodium polyphosphate 68915-31-1 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Sodium pyrophosphate 7758-16-9 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Sodium salts of inorganic phosphates E524680404 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Sodium trimetaphosphate 7785-84-4 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Sodium tripolyphosphate 7758-29-4 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Tetrapotassium phosphate 7320-34-5 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Tetrasodium pyrophosphate 7722-88-5 7.8E+04 n 1.2E+06 nm 2.0E+04 n
3.25E+00 X 1 ~Trialuminum sodium tetra decahydrogenoctaorthophosphate (dihydrate)15136-87-5 2.5E+05 nm 3.8E+06 nm 6.5E+04 n
3.13E+00 X 1 0.1 ~Triphosphoric acid, aluminum salt (1:1) [aluminum triphosphate]13939-25-8 2.0E+05 nm 2.6E+06 nm 6.2E+04 n
1.00E+00 P 1 ~Tripotassium phosphate 7778-53-2 7.8E+04 n 1.2E+06 nm 2.0E+04 n
1.00E+00 P 1 ~Trisodium phosphate 7601-54-9 7.8E+04 n 1.2E+06 nm 2.0E+04 n
3.00E-04 I 3.00E-04 I V 1 Phosphine 7803-51-2 2.3E+01 n 3.5E+02 n 3.1E-01 n 1.3E+00 n 5.7E-01 n
1.00E+00 P 1.00E-02 I 1 Phosphoric Acid 7664-38-2 7.8E+04 n 1.1E+06 nm 1.0E+01 n 4.4E+01 n 2.0E+04 n
2.00E-05 I V 1 Phosphorus, White 7723-14-0 1.6E+00 n 2.3E+01 n 4.0E-01 n 1.5E-03 n
Phthalates
1.40E-02 I 2.40E-06 C 2.00E-02 I 1 0.1 ~Bis(2-ethylhexyl)phthalate 117-81-7 3.9E+01 c*1.6E+02 c 1.2E+00 c 5.1E+00 c 5.6E+00 c*6.0E+00 1.3E+00 c*1.4E+00
1.90E-03 P 2.00E-01 I 1 0.1 ~Butyl Benzyl Phthalate 85-68-7 2.9E+02 c*1.2E+03 c 1.6E+01 c 2.4E-01 c
1.00E+00 I 1 0.1 ~Butylphthalyl Butylglycolate 85-70-1 6.3E+04 n 8.2E+05 nm 1.3E+04 n 3.1E+02 n
1.00E-01 I 1 0.1 ~Dibutyl Phthalate 84-74-2 6.3E+03 n 8.2E+04 n 9.0E+02 n 2.3E+00 n
8.00E-01 I 1 0.1 ~Diethyl Phthalate 84-66-2 5.1E+04 n 6.6E+05 nm 1.5E+04 n 6.1E+00 n
1.00E-01 I V 1 ~Dimethylterephthalate 120-61-6 7.8E+03 n 1.2E+05 nm 1.9E+03 n 4.9E-01 n
1.00E-02 P 1 0.1 ~Octyl Phthalate, di-N-117-84-0 6.3E+02 n 8.2E+03 n 2.0E+02 n 5.7E+01 n
5.00E-01 X 1 0.1 ~Phthalic Acid, p-100-21-0 3.2E+04 n 4.1E+05 nm 9.4E+03 n 3.4E+00 n
2.00E+00 I 2.00E-02 C 1 0.1 ~Phthalic Anhydride 85-44-9 1.3E+05 nm 1.6E+06 nm 2.1E+01 n 8.8E+01 n 3.9E+04 n 8.5E+00 n
7.00E-02 I 1 0.1 Picloram 1918-02-1 4.4E+03 n 5.7E+04 n 1.4E+03 n 5.0E+02 3.8E-01 n 1.4E-01
1.00E-04 X 1 0.1 Picramic Acid (2-Amino-4,6-dinitrophenol)96-91-3 6.3E+00 n 8.2E+01 n 2.0E+00 n 1.3E-03 n
2.00E-03 X 1 0.1 Picric Acid (2,4,6-Trinitrophenol)88-89-1 1.3E+02 n 1.6E+03 n 4.0E+01 n 1.9E-01 n
7.30E-04 O 1 0.1 Pirimiphos, Methyl 29232-93-7 4.6E+01 n 6.0E+02 n 8.9E+00 n 8.4E-03 n
3.00E+01 C 8.60E-03 C 7.00E-06 H 1 0.1 Polybrominated Biphenyls 36355-01-8 1.8E-02 c*7.7E-02 c*3.3E-04 c 1.4E-03 c 2.6E-03 c*
Polychlorinated Biphenyls (PCBs)
7.00E-02 G 2.00E-05 G 7.00E-05 I V 1 0.14 ~Aroclor 1016 12674-11-2 4.1E+00 n 2.7E+01 c**1.4E-01 c 6.1E-01 c 2.2E-01 c**2.1E-02 c**
2.00E+00 G 5.71E-04 G V 1 0.14 ~Aroclor 1221 11104-28-2 2.0E-01 c 8.3E-01 c 4.9E-03 c 2.1E-02 c 4.7E-03 c 8.0E-05 c
2.00E+00 G 5.71E-04 G V 1 0.14 ~Aroclor 1232 11141-16-5 1.7E-01 c 7.2E-01 c 4.9E-03 c 2.1E-02 c 4.7E-03 c 8.0E-05 c
2.00E+00 G 5.71E-04 G V 1 0.14 ~Aroclor 1242 53469-21-9 2.3E-01 c 9.5E-01 c 4.9E-03 c 2.1E-02 c 7.8E-03 c 1.2E-03 c
2.00E+00 G 5.71E-04 G V 1 0.14 ~Aroclor 1248 12672-29-6 2.3E-01 c 9.4E-01 c 4.9E-03 c 2.1E-02 c 7.8E-03 c 1.2E-03 c
2.00E+00 G 5.71E-04 G 2.00E-05 I V 1 0.14 ~Aroclor 1254 11097-69-1 2.4E-01 c**9.7E-01 c*4.9E-03 c 2.1E-02 c 7.8E-03 c*2.0E-03 c*
2.00E+00 G 5.71E-04 G V 1 0.14 ~Aroclor 1260 11096-82-5 2.4E-01 c 9.9E-01 c 4.9E-03 c 2.1E-02 c 7.8E-03 c 5.5E-03 c
6.00E-04 X V 1 0.14 ~Aroclor 5460 11126-42-4 3.5E+01 n 4.4E+02 n 1.2E+01 n 2.0E+00 n
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189)39635-31-9 1.3E-01 c*5.2E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 2.8E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167)52663-72-6 1.2E-01 c*5.1E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.7E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157)69782-90-7 1.2E-01 c*5.0E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.7E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156)38380-08-4 1.2E-01 c*5.0E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.7E-03 c
3.90E+03 W 1.14E+00 W 2.33E-08 W 1.33E-06 W V 1 0.14 ~Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169)32774-16-6 1.2E-04 c*5.1E-04 c*2.5E-06 c 1.1E-05 c 4.0E-06 c 1.7E-06 c
Page 8 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123)65510-44-3 1.2E-01 c*4.9E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.0E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118)31508-00-6 1.2E-01 c*4.9E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.0E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105)32598-14-4 1.2E-01 c*4.9E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.0E-03 c
3.90E+00 W 1.14E-03 W 2.33E-05 W 1.33E-03 W V 1 0.14 ~Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114)74472-37-0 1.2E-01 c*5.0E-01 c*2.5E-03 c 1.1E-02 c 4.0E-03 c 1.0E-03 c
1.30E+04 W 3.80E+00 W 7.00E-09 W 4.00E-07 W V 1 0.14 ~Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126)57465-28-8 3.6E-05 c*1.5E-04 c*7.4E-07 c 3.2E-06 c 1.2E-06 c 3.0E-07 c
2.00E+00 I 5.71E-04 I V 1 0.14 ~Polychlorinated Biphenyls (high risk)1336-36-3 2.3E-01 c 9.4E-01 c 4.9E-03 c 2.1E-02 c 5.0E-01
4.00E-01 I 1.00E-04 I V 1 0.14 ~Polychlorinated Biphenyls (low risk)1336-36-3 2.8E-02 c 1.2E-01 c 4.4E-02 c 5.0E-01 6.8E-03 c 7.8E-02
7.00E-02 I 2.00E-05 I V 1 0.14 ~Polychlorinated Biphenyls (lowest risk)1336-36-3 1.4E-01 c 6.1E-01 c 5.0E-01
1.30E+01 W 3.80E-03 W 7.00E-06 W 4.00E-04 W 1 0.14 ~Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77)32598-13-3 3.8E-02 c*1.6E-01 c*7.4E-04 c 3.2E-03 c 6.0E-03 c*9.4E-04 c*
3.90E+01 W 1.14E-02 W 2.33E-06 W 1.33E-04 W V 1 0.14 ~Tetrachlorobiphenyl, 3,4,4',5- (PCB 81)70362-50-4 1.2E-02 c*4.8E-02 c*2.5E-04 c 1.1E-03 c 4.0E-04 c 6.2E-05 c
6.00E-04 I 1 0.1 Polymeric Methylene Diphenyl Diisocyanate (PMDI)9016-87-9 8.5E+05 nm 3.6E+06 nm 6.3E-01 n 2.6E+00 n
Polynuclear Aromatic Hydrocarbons (PAHs)
6.00E-02 I V 1 0.13 ~Acenaphthene 83-32-9 3.6E+03 n 4.5E+04 n 5.3E+02 n 5.5E+00 n
3.00E-01 I V 1 0.13 ~Anthracene 120-12-7 1.8E+04 n 2.3E+05 nm 1.8E+03 n 5.8E+01 n
1.00E-01 E 6.00E-05 E V M 1 0.13 ~Benz[a]anthracene 56-55-3 1.1E+00 c 2.1E+01 c 1.7E-02 c 2.0E-01 c 3.0E-02 c 1.1E-02 c
1.00E+00 I 6.00E-04 I 3.00E-04 I 2.00E-06 I M 1 0.13 ~Benzo[a]pyrene 50-32-8 1.1E-01 c 2.1E+00 c 1.7E-03 c**8.8E-03 n 2.5E-02 c 2.0E-01 2.9E-02 c 2.4E-01
1.00E-01 E 6.00E-05 E M 1 0.13 ~Benzo[b]fluoranthene 205-99-2 1.1E+00 c 2.1E+01 c 1.7E-02 c 2.0E-01 c 2.5E-01 c 3.0E-01 c
9.00E-05 X 2.00E-06 X 1 0.1 ~Benzo[e]pyrene 192-97-2 5.7E+00 n 7.3E+01 n 2.1E-03 n 8.8E-03 n 1.8E+00 n 2.2E+00 n
1.20E+00 C 1.10E-04 C 1 0.13 ~Benzo[j]fluoranthene 205-82-3 4.2E-01 c 1.8E+00 c 2.6E-02 c 1.1E-01 c 6.5E-02 c 7.8E-02 c
1.00E-02 E 6.00E-06 E M 1 0.13 ~Benzo[k]fluoranthene 207-08-9 1.1E+01 c 2.1E+02 c 1.7E-01 c 2.0E+00 c 2.5E+00 c 2.9E+00 c
8.00E-02 I V 1 0.13 ~Chloronaphthalene, Beta-91-58-7 4.8E+03 n 6.0E+04 n 7.5E+02 n 3.9E+00 n
1.00E-03 E 6.00E-07 E M 1 0.13 ~Chrysene 218-01-9 1.1E+02 c 2.1E+03 c 1.7E+00 c 2.0E+01 c 2.5E+01 c 9.0E+00 c
1.00E+00 E 6.00E-04 E M 1 0.13 ~Dibenz[a,h]anthracene 53-70-3 1.1E-01 c 2.1E+00 c 1.7E-03 c 2.0E-02 c 2.5E-02 c 9.6E-02 c
1.20E+01 C 1.10E-03 C 1 0.13 ~Dibenzo[a,e]pyrene 192-65-4 4.2E-02 c 1.8E-01 c 2.6E-03 c 1.1E-02 c 6.5E-03 c 8.4E-02 c
2.50E+02 C 7.10E-02 C M 1 0.13 ~Dimethylbenz[a]anthracene, 7,12-57-97-6 4.6E-04 c 8.4E-03 c 1.4E-05 c 1.7E-04 c 1.0E-04 c 9.9E-05 c
4.00E-02 I 1 0.13 ~Fluoranthene 206-44-0 2.4E+03 n 3.0E+04 n 8.0E+02 n 8.9E+01 n
4.00E-02 I V 1 0.13 ~Fluorene 86-73-7 2.4E+03 n 3.0E+04 n 2.9E+02 n 5.4E+00 n
1.00E-01 E 6.00E-05 E M 1 0.13 ~Indeno[1,2,3-cd]pyrene 193-39-5 1.1E+00 c 2.1E+01 c 1.7E-02 c 2.0E-01 c 2.5E-01 c 9.8E-01 c
5.10E-02 X 7.00E-02 A 3.00E-06 P V 1 0.13 3.94E+02 ~Methylnaphthalene, 1-90-12-0 1.8E-01 n 7.7E-01 n 3.1E-03 n 1.3E-02 n 6.3E-03 n 3.3E-05 n
4.00E-03 I V 1 0.13 ~Methylnaphthalene, 2-91-57-6 2.4E+02 n 3.0E+03 n 3.6E+01 n 1.9E-01 n
1.20E-01 C 3.40E-05 C 2.00E-02 I 3.00E-03 I V 1 0.13 ~Naphthalene 91-20-3 2.0E+00 c*8.6E+00 c*8.3E-02 c*3.6E-01 c*1.2E-01 c*3.8E-04 c*
1.20E+00 C 1.10E-04 C 1 0.13 ~Nitropyrene, 4-57835-92-4 4.2E-01 c 1.8E+00 c 2.6E-02 c 1.1E-01 c 1.9E-02 c 3.3E-03 c
9.00E-05 X 2.00E-06 X 1 0.13 ~Perylene 198-55-0 5.4E+00 n 6.7E+01 n 2.1E-03 n 8.8E-03 n 1.8E+00 n 2.2E+00 n
3.00E-02 I V 1 0.13 ~Pyrene 129-00-0 1.8E+03 n 2.3E+04 n 1.2E+02 n 1.3E+01 n
1.50E-01 I 9.00E-03 I 1 0.1 Prochloraz 67747-09-5 3.6E+00 c 1.5E+01 c 3.8E-01 c 1.9E-03 c
6.00E-03 H V 1 Profluralin 26399-36-0 4.7E+02 n 7.0E+03 n 2.6E+01 n 1.6E+00 n
1.50E-02 I 1 0.1 Prometon 1610-18-0 9.5E+02 n 1.2E+04 n 2.5E+02 n 1.2E-01 n
4.00E-02 O 1 0.1 Prometryn 7287-19-6 2.5E+03 n 3.3E+04 n 6.0E+02 n 9.0E-01 n
7.50E-02 I 1 0.1 Pronamide 23950-58-5 4.7E+03 n 6.2E+04 n 1.2E+03 n 1.2E+00 n
1.30E-02 I 1 0.1 Propachlor 1918-16-7 8.2E+02 n 1.1E+04 n 2.5E+02 n 1.5E-01 n
5.00E-03 I 1 0.1 Propanil 709-98-8 3.2E+02 n 4.1E+03 n 8.2E+01 n 4.5E-02 n
1.92E-01 O 4.00E-02 O 1 0.1 Propargite 2312-35-8 2.8E+00 c 1.2E+01 c 1.6E-01 c 1.1E-02 c
2.00E-03 I V 1 1.11E+05 Propargyl Alcohol 107-19-7 1.6E+02 n 2.3E+03 n 4.0E+01 n 8.1E-03 n
2.00E-02 I 1 0.1 Propazine 139-40-2 1.3E+03 n 1.6E+04 n 3.4E+02 n 3.0E-01 n
2.00E-02 I 1 0.1 Propham 122-42-9 1.3E+03 n 1.6E+04 n 3.5E+02 n 2.2E-01 n
1.00E-01 O 1 0.1 Propiconazole 60207-90-1 6.3E+03 n 8.2E+04 n 1.6E+03 n 5.3E+00 n
8.00E-03 I V 1 3.26E+04 Propionaldehyde 123-38-6 7.5E+01 n 3.1E+02 n 8.3E+00 n 3.5E+01 n 1.7E+01 n 3.4E-03 n
1.00E-01 X 1.00E+00 X V 1 2.64E+02 Propyl benzene 103-65-1 3.8E+03 ns 2.4E+04 ns 1.0E+03 n 4.4E+03 n 6.6E+02 n 1.2E+00 n
3.00E+00 C V 1 3.49E+02 Propylene 115-07-1 2.2E+03 ns 9.3E+03 ns 3.1E+03 n 1.3E+04 n 6.3E+03 n 6.0E+00 n
2.00E+01 P 1 0.1 Propylene Glycol 57-55-6 1.3E+06 nm 1.6E+07 nm 4.0E+05 n 8.1E+01 n
2.72E-04 A 1 0.1 Propylene Glycol Dinitrate 6423-43-4 3.9E+05 nm 1.6E+06 nm 2.8E-01 n 1.2E+00 n
7.00E-01 H 2.00E+00 I V 1 1.06E+05 Propylene Glycol Monomethyl Ether 107-98-2 4.1E+04 n 3.7E+05 nms 2.1E+03 n 8.8E+03 n 3.2E+03 n 6.5E-01 n
2.40E-01 I 3.70E-06 I 3.00E-02 I V 1 7.77E+04 Propylene Oxide 75-56-9 2.1E+00 c 9.7E+00 c 7.6E-01 c*3.3E+00 c*2.7E-01 c 5.6E-05 c
1.00E-03 I V 1 5.30E+05 Pyridine 110-86-1 7.8E+01 n 1.2E+03 n 2.0E+01 n 6.8E-03 n
5.00E-04 I 1 0.1 Quinalphos 13593-03-8 3.2E+01 n 4.1E+02 n 5.1E+00 n 4.3E-02 n
3.00E+00 I 1 0.1 Quinoline 91-22-5 1.8E-01 c 7.7E-01 c 2.4E-02 c 7.8E-05 c
9.00E-03 I 1 0.1 Quizalofop-ethyl 76578-14-8 5.7E+02 n 7.4E+03 n 1.2E+02 n 1.9E+00 n
3.00E+04 A 1 Refractory Ceramic Fibers (units in fibers)E715557 3.1E+04 G 1.3E+05 G
3.00E-02 I 1 0.1 Resmethrin 10453-86-8 1.9E+03 n 2.5E+04 n 6.7E+01 n 4.2E+01 n
5.00E-02 H V 1 Ronnel 299-84-3 3.9E+03 n 5.8E+04 n 4.1E+02 n 3.7E+00 n
4.00E-03 I 1 0.1 Rotenone 83-79-4 2.5E+02 n 3.3E+03 n 6.1E+01 n 3.2E+01 n
2.20E-01 C 6.30E-05 C M 1 0.1 Safrole 94-59-7 5.5E-01 c 1.0E+01 c 1.6E-02 c 1.9E-01 c 9.6E-02 c 5.9E-05 c
5.00E-03 I 1 Selenious Acid 7783-00-8 3.9E+02 n 5.8E+03 n 1.0E+02 n
5.00E-03 I 2.00E-02 C 1 Selenium 7782-49-2 3.9E+02 n 5.8E+03 n 2.1E+01 n 8.8E+01 n 1.0E+02 n 5.0E+01 5.2E-01 n 2.6E-01
5.00E-03 C 2.00E-02 C 1 Selenium Sulfide 7446-34-6 3.9E+02 n 5.8E+03 n 2.1E+01 n 8.8E+01 n 1.0E+02 n
1.40E-01 O 1 0.1 Sethoxydim 74051-80-2 8.8E+03 n 1.1E+05 nm 1.6E+03 n 1.4E+01 n
3.00E-03 C 1 Silica (crystalline, respirable)7631-86-9 4.3E+06 nm 1.8E+07 nm 3.1E+00 n 1.3E+01 n
5.00E-03 I 0.04 Silver 7440-22-4 3.9E+02 n 5.8E+03 n 9.4E+01 n 8.0E-01 n
1.20E-01 H 5.00E-03 I 1 0.1 Simazine 122-34-9 4.5E+00 c*1.9E+01 c 6.1E-01 c 4.0E+00 3.0E-04 c 2.0E-03
1.30E-02 I 1 0.1 Sodium Acifluorfen 62476-59-9 8.2E+02 n 1.1E+04 n 2.6E+02 n 2.1E+00 n
4.00E-03 I 1 Sodium Azide 26628-22-8 3.1E+02 n 4.7E+03 n 8.0E+01 n
2.70E-01 H 3.00E-02 I 1 0.1 Sodium Diethyldithiocarbamate 148-18-5 2.0E+00 c 8.5E+00 c 2.9E-01 c 1.8E-04 c
5.00E-02 A 1.40E-02 C 1 Sodium Fluoride 7681-49-4 3.9E+03 n 5.8E+04 n 1.5E+01 n 6.1E+01 n 1.0E+03 n 4.0E+03 1.5E+02 n 6.0E+02
2.00E-05 I 1 0.1 Sodium Fluoroacetate 62-74-8 1.3E+00 n 1.6E+01 n 4.0E-01 n 8.1E-05 n
1.00E-03 H 1 Sodium Metavanadate 13718-26-8 7.8E+01 n 1.2E+03 n 2.0E+01 n
8.00E-04 P 1 Sodium Tungstate 13472-45-2 6.3E+01 n 9.3E+02 n 1.6E+01 n
8.00E-04 P 1 Sodium Tungstate Dihydrate 10213-10-2 6.3E+01 n 9.3E+02 n 1.6E+01 n
2.40E-02 H 3.00E-02 I 1 0.1 Stirofos (Tetrachlorovinphos)961-11-5 2.3E+01 c*9.6E+01 c 2.8E+00 c 8.2E-03 c
6.00E-01 I 1 Strontium, Stable 7440-24-6 4.7E+04 n 7.0E+05 nm 1.2E+04 n 4.2E+02 n
3.00E-04 I 1 0.1 Strychnine 57-24-9 1.9E+01 n 2.5E+02 n 5.9E+00 n 6.5E-02 n
2.00E-01 I 1.00E+00 I V 1 8.67E+02 Styrene 100-42-5 6.0E+03 ns 3.5E+04 ns 1.0E+03 n 4.4E+03 n 1.2E+03 n 1.0E+02 1.3E+00 n 1.1E-01
3.00E-03 P 1 0.1 Styrene-Acrylonitrile (SAN) Trimer (THNA isomer)57964-39-3 1.9E+02 n 2.5E+03 n 4.8E+01 n
3.00E-03 P 1 0.1 Styrene-Acrylonitrile (SAN) Trimer (THNP isomer)57964-40-6 1.9E+02 n 2.5E+03 n 4.8E+01 n
1.00E-03 P 2.00E-03 X 1 0.1 Sulfolane 126-33-0 6.3E+01 n 8.2E+02 n 2.1E+00 n 8.8E+00 n 2.0E+01 n 4.4E-03 n
Page 9 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
8.00E-04 P 1 0.1 Sulfonylbis(4-chlorobenzene), 1,1'-80-07-9 5.1E+01 n 6.6E+02 n 1.1E+01 n 6.5E-02 n
1.00E-03 C V 1 Sulfur Trioxide 7446-11-9 1.4E+06 nm 6.0E+06 nm 1.0E+00 n 4.4E+00 n 2.1E+00 n
1.00E-03 C 1 Sulfuric Acid 7664-93-9 1.4E+06 nm 6.0E+06 nm 1.0E+00 n 4.4E+00 n
2.50E-02 I 7.10E-06 I 5.00E-02 H 1 0.1 Sulfurous acid, 2-chloroethyl 2-[4-(1,1-dimethylethyl)phenoxy]-1-methylethyl ester 140-57-8 2.2E+01 c 9.2E+01 c 4.0E-01 c 1.7E+00 c 1.3E+00 c 1.5E-02 c
7.00E-02 I 1 0.1 Tebuthiuron 34014-18-1 4.4E+03 n 5.7E+04 n 1.4E+03 n 3.9E-01 n
2.00E-02 H 1 0.1 Temephos 3383-96-8 1.3E+03 n 1.6E+04 n 4.0E+02 n 7.6E+01 n
1.30E-02 I 1 0.1 Terbacil 5902-51-2 8.2E+02 n 1.1E+04 n 2.5E+02 n 7.5E-02 n
2.50E-05 H V 1 3.09E+01 Terbufos 13071-79-9 2.0E+00 n 2.9E+01 n 2.4E-01 n 5.2E-04 n
1.00E-03 I 1 0.1 Terbutryn 886-50-0 6.3E+01 n 8.2E+02 n 1.3E+01 n 1.9E-02 n
5.00E-03 C 1.30E-06 C V 1 Tert-Butyl Acetate 540-88-5 8.1E+00 c 3.6E+01 c 2.2E+00 c 9.4E+00 c 3.3E+00 c 7.6E-04 c
1.00E-04 I 1 0.1 Tetrabromodiphenyl ether, 2,2',4,4'- (BDE-47)5436-43-1 6.3E+00 n 8.2E+01 n 2.0E+00 n 5.3E-02 n
3.00E-05 P V 1 Tetrachlorobenzene, 1,2,4,5-95-94-3 2.3E+00 n 3.5E+01 n 1.7E-01 n 7.9E-04 n
2.60E-02 I 7.40E-06 I 3.00E-02 I V 1 6.80E+02 Tetrachloroethane, 1,1,1,2-630-20-6 2.0E+00 c 8.8E+00 c 3.8E-01 c 1.7E+00 c 5.7E-01 c 2.2E-04 c
2.00E-01 I 5.80E-05 C 2.00E-02 I V 1 1.90E+03 Tetrachloroethane, 1,1,2,2-79-34-5 6.0E-01 c 2.7E+00 c 4.8E-02 c 2.1E-01 c 7.6E-02 c 3.0E-05 c
2.10E-03 I 2.60E-07 I 6.00E-03 I 4.00E-02 I V 1 1.66E+02 Tetrachloroethylene 127-18-4 2.4E+01 c**1.0E+02 c**1.1E+01 c**4.7E+01 c**1.1E+01 c**5.0E+00 5.1E-03 c**2.3E-03
3.00E-02 I 1 0.1 Tetrachlorophenol, 2,3,4,6-58-90-2 1.9E+03 n 2.5E+04 n 2.4E+02 n 1.8E-01 n
1.60E+01 X 6.00E-05 X V 1 Tetrachlorotoluene, p- alpha, alpha, alpha-5216-25-1 4.3E-02 c 2.0E-01 c 1.7E-03 c 5.7E-06 c
5.00E-04 I 1 0.1 Tetraethyl Dithiopyrophosphate 3689-24-5 3.2E+01 n 4.1E+02 n 7.1E+00 n 5.2E-03 n
8.00E+01 I V 1 2.05E+03 Tetrafluoroethane, 1,1,1,2-811-97-2 1.0E+05 nms 4.3E+05 nms 8.3E+04 n 3.5E+05 n 1.7E+05 n 9.3E+01 n
1.00E-04 X 1 0.1 Tetramethylphosphoramide, -N,N,N',N" (TMPA)16853-36-4 6.3E+00 n 8.2E+01 n 2.0E+00 n
2.00E-03 P 1 0.00065 Tetryl (Trinitrophenylmethylnitramine)479-45-8 1.6E+02 n 2.3E+03 n 3.9E+01 n 3.7E-01 n
2.00E-05 G 1 Thallic Oxide 1314-32-5 1.6E+00 n 2.3E+01 n 4.0E-01 n
1.00E-05 X 1 Thallium (I) Nitrate 10102-45-1 7.8E-01 n 1.2E+01 n 2.0E-01 n
1.00E-05 X 1 Thallium (Soluble Salts)7440-28-0 7.8E-01 n 1.2E+01 n 2.0E-01 n 2.0E+00 1.4E-02 n 1.4E-01
1.00E-05 X V 1 Thallium Acetate 563-68-8 7.8E-01 n 1.2E+01 n 2.0E-01 n 4.1E-05 n
2.00E-05 X 1 0.1 Thallium Carbonate 6533-73-9 1.3E+00 n 1.6E+01 n 4.0E-01 n 8.3E-05 n
1.00E-05 X 1 Thallium Chloride 7791-12-0 7.8E-01 n 1.2E+01 n 2.0E-01 n
1.00E-05 G 1 Thallium Selenite 12039-52-0 7.8E-01 n 1.2E+01 n 2.0E-01 n
2.00E-05 X 1 Thallium Sulfate 7446-18-6 1.6E+00 n 2.3E+01 n 4.0E-01 n
4.30E-02 O 1 0.1 Thifensulfuron-methyl 79277-27-3 2.7E+03 n 3.5E+04 n 8.6E+02 n 2.6E-01 n
1.00E-02 I 1 0.1 Thiobencarb 28249-77-6 6.3E+02 n 8.2E+03 n 1.6E+02 n 5.5E-01 n
3.00E-02 H 1 0.1 Thiocyanic acid, (2-benzothiazolylthio)methyl ester (TCMTB)21564-17-0 1.9E+03 n 2.5E+04 n 4.8E+02 n 3.3E+00 n
7.00E-02 X 1 0.0075 Thiodiglycol 111-48-8 5.4E+03 n 7.9E+04 n 1.4E+03 n 2.8E-01 n
3.00E-04 H 1 0.1 Thiofanox 39196-18-4 1.9E+01 n 2.5E+02 n 5.3E+00 n 1.8E-03 n
1.16E-02 O 1.60E-01 O 1 0.1 Thiophanate, Methyl 23564-05-8 4.7E+01 c 2.0E+02 c 6.7E+00 c 5.7E-03 c
1.50E-02 O 1 0.1 Thiram 137-26-8 9.5E+02 n 1.2E+04 n 2.9E+02 n 4.2E-01 n
6.00E-01 H 1 Tin 7440-31-5 4.7E+04 n 7.0E+05 nm 1.2E+04 n 3.0E+03 n
1.00E-04 A V 1 Titanium Tetrachloride 7550-45-0 1.4E+05 nm 6.0E+05 nm 1.0E-01 n 4.4E-01 n 2.1E-01 n
8.00E-02 I 5.00E+00 I V 1 8.18E+02 Toluene 108-88-3 4.9E+03 ns 4.7E+04 ns 5.2E+03 n 2.2E+04 n 1.1E+03 n 1.0E+03 7.6E-01 n 6.9E-01
3.90E-02 C 1.10E-05 C 8.00E-06 C V 1 Toluene-2,4-diisocyanate 584-84-9 6.4E+00 n 2.7E+01 n 8.3E-03 n 3.5E-02 n 1.7E-02 n 2.5E-04 n
3.90E-02 C 1.10E-05 C 8.00E-06 C V 1 1.71E+03 Toluene-2,6-diisocyanate 91-08-7 5.3E+00 n 2.2E+01 n 8.3E-03 n 3.5E-02 n 1.7E-02 n 2.6E-04 n
1.00E-04 X 1 0.1 Toluenediamine, 2,3-2687-25-4 6.3E+00 n 8.2E+01 n 2.0E+00 n 6.2E-04 n
1.80E-01 X 2.00E-04 X 1 0.1 Toluenediamine, 2,5-95-70-5 3.0E+00 c**1.3E+01 c*4.3E-01 c**1.3E-04 c**
1.00E-04 X 1 0.1 Toluenediamine, 3,4-496-72-0 6.3E+00 n 8.2E+01 n 2.0E+00 n 6.2E-04 n
5.00E-03 P 1 0.1 Toluic Acid, p-99-94-5 3.2E+02 n 4.1E+03 n 9.0E+01 n 2.3E-02 n
1.60E-02 P 5.10E-05 C 1 0.1 Toluidine, o- (Methylaniline, 2-)95-53-4 3.4E+01 c 1.4E+02 c 5.5E-02 c 2.4E-01 c 4.7E+00 c 2.0E-03 c
3.00E-02 P 4.00E-03 X 1 0.1 Toluidine, p-106-49-0 1.8E+01 c*7.7E+01 c*2.5E+00 c*1.1E-03 c*
3.00E+00 P V 1 3.42E-01 Total Petroleum Hydrocarbons (Aliphatic High)E1790670 2.3E+05 nms 3.5E+06 nms 6.0E+04 n 2.4E+03 n
5.00E-03 P 4.00E-01 P V 1 1.12E+02 Total Petroleum Hydrocarbons (Aliphatic Low)E1790666 2.5E+02 ns 1.9E+03 ns 4.2E+02 n 1.8E+03 n 2.8E+01 n 2.0E-02 n
1.00E-02 X 1.00E-01 P V 1 6.86E+00 Total Petroleum Hydrocarbons (Aliphatic Medium)E1790668 9.6E+01 ns 4.4E+02 ns 1.0E+02 n 4.4E+02 n 1.0E+02 n 1.5E+00 n
3.00E-04 P 2.00E-06 P M 1 0.13 Total Petroleum Hydrocarbons (Aromatic High)E1790676 1.8E+01 n 2.2E+02 n 2.1E-03 n 8.8E-03 n 6.0E+00 n 7.1E+00 n
1.00E-02 P 6.00E-02 P V 1 2.31E+02 Total Petroleum Hydrocarbons (Aromatic Medium)E1790674 3.0E+02 ns 1.7E+03 ns 6.3E+01 n 2.6E+02 n 5.7E+01 n 8.3E-02 n
1.10E+00 I 3.20E-04 I 9.00E-05 P 1 0.1 Toxaphene 8001-35-2 4.9E-01 c*2.1E+00 c*8.8E-03 c 3.8E-02 c 7.1E-02 c*3.0E+00 1.1E-02 c*4.6E-01
3.00E-05 X 1 0.1 Toxaphene, Weathered E1841606 1.9E+00 n 2.5E+01 n 6.0E-01 n 9.3E-02 n
7.50E-03 I 1 0.1 Tralomethrin 66841-25-6 4.7E+02 n 6.2E+03 n 1.5E+02 n 5.8E+01 n
3.00E-04 A V 1 Tri-n-butyltin 688-73-3 2.3E+01 n 3.5E+02 n 3.7E+00 n 8.2E-02 n
8.00E+01 X 1 0.1 Triacetin 102-76-1 5.1E+06 nm 6.6E+07 nm 1.6E+06 n 4.5E+02 n
3.40E-02 O 1 0.1 Triadimefon 43121-43-3 2.1E+03 n 2.8E+04 n 6.3E+02 n 5.0E-01 n
7.17E-02 O 2.50E-02 O V 1 Triallate 2303-17-5 9.7E+00 c 4.6E+01 c 4.7E-01 c 1.0E-03 c
1.00E-02 I 1 0.1 Triasulfuron 82097-50-5 6.3E+02 n 8.2E+03 n 2.0E+02 n 2.1E-01 n
8.00E-03 I 1 0.1 Tribenuron-methyl 101200-48-0 5.1E+02 n 6.6E+03 n 1.6E+02 n 6.1E-02 n
5.00E-03 I V 1 Tribromobenzene, 1,2,4-615-54-3 3.9E+02 n 5.8E+03 n 4.5E+01 n 6.4E-02 n
9.00E-03 X 1 0.1 Tribromophenol, 2,4,6-118-79-6 5.7E+02 n 7.4E+03 n 1.2E+02 n 2.2E-01 n
2.00E-04 O 1 0.1 Tribufos 78-48-8 1.3E+01 n 1.6E+02 n 5.7E-01 n 2.8E-03 n
9.00E-03 P 1.00E-02 P 1 0.1 Tributyl Phosphate 126-73-8 6.0E+01 c*2.6E+02 c*5.2E+00 c*2.5E-02 c*
3.00E-04 P 1 0.1 Tributyltin Compounds E1790679 1.9E+01 n 2.5E+02 n 6.0E+00 n
3.00E-04 I 1 0.1 Tributyltin Oxide 56-35-9 1.9E+01 n 2.5E+02 n 5.7E+00 n 2.9E+02 n
1 0.1 Trichloramine 10025-85-1 4.0E+03(G)
3.00E+01 I 5.00E+00 P V 1 9.10E+02 Trichloro-1,2,2-trifluoroethane, 1,1,2-76-13-1 6.7E+03 ns 2.8E+04 ns 5.2E+03 n 2.2E+04 n 1.0E+04 n 2.6E+01 n
7.00E-02 I 2.00E-02 I 1 0.1 Trichloroacetic Acid 76-03-9 7.8E+00 c 3.3E+01 c 1.1E+00 c 6.0E+01(G)2.2E-04 c 1.2E-02
2.90E-02 H 1 0.1 Trichloroaniline HCl, 2,4,6-33663-50-2 1.9E+01 c 7.9E+01 c 2.7E+00 c 7.4E-03 c
7.00E-03 X 3.00E-05 X 1 0.1 Trichloroaniline, 2,4,6-634-93-5 1.9E+00 n 2.5E+01 n 4.0E-01 n 3.6E-03 n
8.00E-04 X V 1 Trichlorobenzene, 1,2,3-87-61-6 6.3E+01 n 9.3E+02 n 7.0E+00 n 2.1E-02 n
2.90E-02 P 1.00E-02 I 2.00E-03 P V 1 4.04E+02 Trichlorobenzene, 1,2,4-120-82-1 2.4E+01 c**1.1E+02 c**2.1E+00 n 8.8E+00 n 1.2E+00 c**7.0E+01 3.4E-03 c**2.0E-01
2.00E+00 I 5.00E+00 I V 1 6.40E+02 Trichloroethane, 1,1,1-71-55-6 8.1E+03 ns 3.6E+04 ns 5.2E+03 n 2.2E+04 n 8.0E+03 n 2.0E+02 2.8E+00 n 7.0E-02
5.70E-02 I 1.60E-05 I 4.00E-03 I 2.00E-04 X V 1 2.16E+03 Trichloroethane, 1,1,2-79-00-5 1.1E+00 c**5.0E+00 c**1.8E-01 c**7.7E-01 c**2.8E-01 c**5.0E+00 8.9E-05 c**1.6E-03
4.60E-02 I 4.10E-06 I 5.00E-04 I 2.00E-03 I V M 1 6.92E+02 Trichloroethylene 79-01-6 9.4E-01 c**6.0E+00 c**4.8E-01 c**3.0E+00 c**4.9E-01 c**5.0E+00 1.8E-04 c**1.8E-03
3.00E-01 I V 1 1.23E+03 Trichlorofluoromethane 75-69-4 2.3E+04 ns 3.5E+05 nms 5.2E+03 n 3.3E+00 n
1.00E-01 I 1 0.1 Trichlorophenol, 2,4,5-95-95-4 6.3E+03 n 8.2E+04 n 1.2E+03 n 4.0E+00 n
1.10E-02 I 3.10E-06 I 1.00E-03 P 1 0.1 Trichlorophenol, 2,4,6-88-06-2 4.9E+01 c**2.1E+02 c**9.1E-01 c 4.0E+00 c 4.1E+00 c**4.0E-03 c**
1.00E-02 I 1 0.1 Trichlorophenoxyacetic Acid, 2,4,5-93-76-5 6.3E+02 n 8.2E+03 n 1.6E+02 n 6.8E-02 n
8.00E-03 I 1 0.1 Trichlorophenoxypropionic acid, -2,4,5 93-72-1 5.1E+02 n 6.6E+03 n 1.1E+02 n 5.0E+01 6.1E-02 n 2.8E-02
5.00E-03 I V 1 1.28E+03 Trichloropropane, 1,1,2-598-77-6 3.9E+02 n 5.8E+03 ns 8.8E+01 n 3.5E-02 n
3.00E+01 I 4.00E-03 I 3.00E-04 I V M 1 1.40E+03 Trichloropropane, 1,2,3-96-18-4 5.1E-03 c 1.1E-01 c 3.1E-01 n 1.3E+00 n 7.5E-04 c 3.2E-07 c
Page 10 of 11
United States Environmental Protection Agency (EPA)
Regional Screening Level (RSL) Summary Table
(TR=1E-06, THQ=1.0)
May 2024
SFO
(mg/kg-day)-1
k
e
y
IUR
(ug/m3)-1
k
e
y
RfDo
(mg/kg-day)
k
e
y
RfCi
(mg/m3)
k
e
y
v
o
l mutagen GIABS ABSd
Csat
(mg/kg) Analyte CAS No.
Resident
Soil
(mg/kg) key
Industrial
Soil
(mg/kg) key
Resident
Air
(ug/m3) key
Industrial
Air
(ug/m3) key
Tap
Water
(ug/L) key
MCL
(ug/L)
Risk-based
SSL
(mg/kg) key
MCL-based
SSL
(mg/kg)
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF applied; E = RPF applied; G = see user's guide; c = cancer; n = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL; SSL values are based on DAF=1; m = ceiling limit exceeded; s =
Csat exceeded; V = volatile; M = mutagen.
Toxicity and Chemical-specific Information Contaminant Screening Levels Protection of Groundwater SSLs
3.00E-03 X 3.00E-04 P V 1 3.11E+02 Trichloropropene, 1,2,3-96-19-5 7.3E-01 n 3.1E+00 n 3.1E-01 n 1.3E+00 n 6.2E-01 n 3.1E-04 n
2.00E-02 A 1 0.1 Tricresyl Phosphate (TCP)1330-78-5 1.3E+03 n 1.6E+04 n 1.6E+02 n 1.5E+01 n
3.00E-03 I 1 0.1 Tridiphane 58138-08-2 1.9E+02 n 2.5E+03 n 1.8E+01 n 1.3E-01 n
7.00E-03 I V 1 2.79E+04 Triethylamine 121-44-8 1.2E+02 n 4.8E+02 n 7.3E+00 n 3.1E+01 n 1.5E+01 n 4.4E-03 n
2.00E+00 P 1 0.1 Triethylene Glycol 112-27-6 1.3E+05 nm 1.6E+06 nm 4.0E+04 n 8.8E+00 n
2.00E+01 P V 1 4.81E+03 Trifluoroethane, 1,1,1-420-46-2 1.5E+04 ns 6.2E+04 ns 2.1E+04 n 8.8E+04 n 4.2E+04 n 1.3E+02 n
7.70E-03 I 7.50E-03 I V 1 Trifluralin 1582-09-8 9.0E+01 c**4.2E+02 c*2.6E+00 c*8.4E-02 c*
2.00E-02 P 1.00E-02 P 1 0.1 Trimethyl Phosphate 512-56-1 2.7E+01 c*1.1E+02 c*3.9E+00 c*8.6E-04 c*
1.00E-02 I 6.00E-02 I V 1 2.93E+02 Trimethylbenzene, 1,2,3-526-73-8 3.4E+02 ns 2.0E+03 ns 6.3E+01 n 2.6E+02 n 5.5E+01 n 8.1E-02 n
1.00E-02 I 6.00E-02 I V 1 2.19E+02 Trimethylbenzene, 1,2,4-95-63-6 3.0E+02 ns 1.8E+03 ns 6.3E+01 n 2.6E+02 n 5.6E+01 n 8.1E-02 n
1.00E-02 I 6.00E-02 I V 1 1.82E+02 Trimethylbenzene, 1,3,5-108-67-8 2.7E+02 ns 1.5E+03 ns 6.3E+01 n 2.6E+02 n 6.0E+01 n 8.7E-02 n
1.00E-02 X V 1 2.96E+01 Trimethylpentene, 2,4,4-25167-70-8 7.8E+02 ns 1.2E+04 ns 3.8E+01 n 1.3E-01 n
3.00E-02 I 1 0.019 Trinitrobenzene, 1,3,5-99-35-4 2.2E+03 n 3.2E+04 n 5.9E+02 n 2.1E+00 n
3.00E-02 I 5.00E-04 I 1 0.032 Trinitrotoluene, 2,4,6-118-96-7 2.1E+01 c**9.6E+01 c**2.5E+00 c**1.5E-02 c**
2.00E-02 P 1 0.1 Triphenylphosphine Oxide 791-28-6 1.3E+03 n 1.6E+04 n 3.6E+02 n 1.5E+00 n
2.00E-02 A 1 0.1 Tris(1,3-Dichloro-2-propyl) Phosphate 13674-87-8 1.3E+03 n 1.6E+04 n 3.6E+02 n 8.0E+00 n
1.00E-02 X 1 0.1 Tris(1-chloro-2-propyl)phosphate 13674-84-5 6.3E+02 n 8.2E+03 n 1.9E+02 n 6.5E-01 n
2.30E+00 C 6.60E-04 C V 1 4.67E+02 Tris(2,3-dibromopropyl)phosphate 126-72-7 2.8E-01 c 1.3E+00 c 4.3E-03 c 1.9E-02 c 6.8E-03 c 1.3E-04 c
2.00E-02 P 7.00E-03 P 1 0.1 Tris(2-chloroethyl)phosphate 115-96-8 2.7E+01 c*1.1E+02 c*3.8E+00 c*3.8E-03 c*
3.20E-03 P 1.00E-01 P 1 0.1 Tris(2-ethylhexyl)phosphate 78-42-2 1.7E+02 c*7.2E+02 c 2.4E+01 c*1.2E+02 c*
8.00E-04 P 1 Tungsten 7440-33-7 6.3E+01 n 9.3E+02 n 1.6E+01 n 2.4E+00 n
2.00E-04 A 4.00E-05 A 1 Uranium 7440-61-1 1.6E+01 n 2.3E+02 n 4.2E-02 n 1.8E-01 n 4.0E+00 n 3.0E+01 1.8E+00 n 1.4E+01
1.00E+00 C 2.90E-04 C M 1 0.1 Urethane 51-79-6 1.2E-01 c 2.3E+00 c 3.5E-03 c 4.2E-02 c 2.5E-02 c 5.6E-06 c
8.30E-03 P 9.00E-03 I 7.00E-06 P 0.026 Vanadium Pentoxide 1314-62-1 4.6E+02 c**2.0E+03 c**3.4E-04 c*1.5E-03 c*1.5E+02 n
5.04E-03 G 1.00E-04 A 0.026 Vanadium and Compounds 7440-62-2 3.9E+02 n 5.8E+03 n 1.0E-01 n 4.4E-01 n 8.6E+01 n 8.6E+01 n
1.00E-03 I V 1 Vernolate 1929-77-7 7.8E+01 n 1.2E+03 n 1.1E+01 n 8.9E-03 n
1.20E-03 O 1 0.1 Vinclozolin 50471-44-8 7.6E+01 n 9.8E+02 n 2.1E+01 n 1.6E-02 n
1.00E+00 H 2.00E-01 I V 1 2.75E+03 Vinyl Acetate 108-05-4 9.1E+02 n 3.8E+03 ns 2.1E+02 n 8.8E+02 n 4.1E+02 n 8.7E-02 n
1.50E-05 P 3.00E-03 I V 1 2.47E+03 Vinyl Bromide 593-60-2 2.6E-01 c*1.1E+00 c*1.9E-01 c*8.2E-01 c*3.7E-01 c*1.1E-04 c*
7.20E-01 I 4.40E-06 I 3.00E-03 I 1.00E-01 I V M 1 3.92E+03 Vinyl Chloride 75-01-4 5.9E-02 c 1.7E+00 c 1.7E-01 c 2.8E+00 c 1.9E-02 c 2.0E+00 6.5E-06 c 6.9E-04
3.00E-04 I 1 0.1 Warfarin 81-81-2 1.9E+01 n 2.5E+02 n 5.6E+00 n 5.9E-03 n
2.00E-01 G 1.00E-01 G V 1 3.88E+02 Xylene, m-108-38-3 5.5E+02 ns 2.4E+03 ns 1.0E+02 n 4.4E+02 n 1.9E+02 n 1.9E-01 n
2.00E-01 G 1.00E-01 G V 1 4.34E+02 Xylene, o-95-47-6 6.4E+02 ns 2.8E+03 ns 1.0E+02 n 4.4E+02 n 1.9E+02 n 1.9E-01 n
2.00E-01 G 1.00E-01 G V 1 3.90E+02 Xylene, p-106-42-3 5.6E+02 ns 2.4E+03 ns 1.0E+02 n 4.4E+02 n 1.9E+02 n 1.9E-01 n
2.00E-01 I 1.00E-01 I V 1 2.60E+02 Xylenes 1330-20-7 5.8E+02 ns 2.5E+03 ns 1.0E+02 n 4.4E+02 n 1.9E+02 n 1.0E+04 1.9E-01 n 9.9E+00
3.00E-04 I 1 Zinc Phosphide 1314-84-7 2.3E+01 n 3.5E+02 n 6.0E+00 n
3.00E-01 I 1 Zinc and Compounds 7440-66-6 2.3E+04 n 3.5E+05 nm 6.0E+03 n 3.7E+02 n
5.00E-02 I 1 0.1 Zineb 12122-67-7 3.2E+03 n 4.1E+04 n 9.9E+02 n 2.9E+00 n
8.00E-05 X 1 Zirconium 7440-67-7 6.3E+00 n 9.3E+01 n 1.6E+00 n 4.8E+00 n
Page 11 of 11

ANALYTICAL
DATA APPENDIX B
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
CMT Technical Services, Inc.
Attn: Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
Work Order: 24K1336
Project: MS-NOORDA Excavation Monitoring
11/25/2024
Approved By:
Andrew Royer, Project Manager
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 19
_____________________________________________________________________________________________
CMT Technical Services, Inc.
Project: MS-NOORDA Excavation Monitoring
Project Manager: Michael Sauerwein
Laboratory ID Sample Name
24K1336-01 NC24 - EXFill - 01
24K1336-02 NC24 - EXFill - 02
24K1336-03 NC24 - EXFill - 03
24K1336-04 NC24 - EXFill - 04
24K1336-05 NC24 - EXFill - 05
24K1336-06 NC24 - EXFill - 06
24K1336-07 NC24 - EXFill - 07
24K1336-08 NC24 - EXFill - 08
24K1336-09 NC24 - EXFill - 09
24K1336-10 NC24 - EXFill - 10
24K1336-11 NC24 - EXFill - 11
24K1336-12 NC24 - EXFill - 12
______________________________________________________________________________________________
Work Order Report Narrative
Sample Preparation
All samples were prepared within method specified holding times. No preparation issues were noted.
Method Blanks
All blank values were within method acceptance criteria. No blank values exceeded the minimum reporting limit for any
analysis in this work order.
Laboratory Control Samples
All laboratory control samples were within method acceptance criteria.
Method Spikes
All method spike recoveries were within method acceptance criteria, except as noted by qualifying flags.
Method Spike Duplicates
All method spike duplicates were within method acceptance criteria, except as noted by qualifying flags.
Corrective Actions
There are no corrective actions associated with this work order.
www.ChemtechFord.com
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
Page 2 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 01
Lab ID: 24K1336-01Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 10:45
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800090.8Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 3 of 18Page 3 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 02
Lab ID: 24K1336-02Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 10:50
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800089.7Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 4 of 18Page 4 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 03
Lab ID: 24K1336-03Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 10:55
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800090.6Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 5 of 18Page 5 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 04
Lab ID: 24K1336-04Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:00
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800089.5Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 6 of 18Page 6 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 05
Lab ID: 24K1336-05Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:05
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800091.9Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 7 of 18Page 7 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 06
Lab ID: 24K1336-06Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:10
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800093.5Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 80820.2PCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 8 of 18Page 8 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 07
Lab ID: 24K1336-07Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:20
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800084.7Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 9 of 18Page 9 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 08
Lab ID: 24K1336-08Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:30
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800093.2Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 10 of 18Page 10 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 09
Lab ID: 24K1336-09Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:40
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800089.5Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 11 of 18Page 11 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 10
Lab ID: 24K1336-10Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:45
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800091.9Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 12 of 18Page 12 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 11
Lab ID: 24K1336-11Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:50
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800091.1Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 13 of 18Page 13 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Sample ID: NC24 - EXFill - 12
Lab ID: 24K1336-12Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/18/24 11:55
Preparation
Date/Time
Sampled By: Michael Sauerwein
Minimum
Reporting
Limit MethodResult
Inorganic
%11/19/2411/19/240.1 CTF800094.1Total Solids
PCBs
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1016
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1221
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1232
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1242
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1248
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1254
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1260
mg/kg dry 11/19/2411/19/240.2 EPA 8082NDPCB-1268
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 14 of 18Page 14 of 19
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
CMT Technical Services, Inc.
Michael Sauerwein
2800 South Redwood Road
West Valley City, UT 84119-2375
PO#:
Receipt:
Date Reported:
Project Name:
17813
11/18/24 17:27 @ 3.6 °C
11/25/2024
MS-NOORDA Excavation Monitoring
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Project Name: MS-NOORDA Excavation Monitoring CtF WO#: 24K1336
www.ChemtechFord.com
Page 15 of 18Page 15 of 19
Page 16 of 19
Page 17 of 19
QC Report for Work Order (WO) - 24K1336
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Duplicate - CTF8000
QC Sample ID: BYK0816-DUP2 QC Source Sample: 24K1336-01Batch: BYK0816
Date Prepared: 11/19/2024 Date Analyzed: 11/19/2024
Total Solids 0.915 20 90.0 90.8 0.1 1.00
CtF WO#: 24K1336
www.ChemtechFord.com Page 18 of 19
QC Report for Work Order (WO) - 24K1336
% Rec RPD RPD Max MRL DFResultSpk ValueLimitsSource ConcAnalyte
Blank - EPA 8082
QC Sample ID: BYK0794-BLK1 Batch: BYK0794
Date Prepared: 11/19/2024 Date Analyzed: 11/19/2024
PCB-1016 ND 0.2 1.00
PCB-1221 ND 0.2 1.00
PCB-1232 ND 0.2 1.00
PCB-1242 ND 0.2 1.00
PCB-1248 ND 0.2 1.00
PCB-1254 ND 0.2 1.00
PCB-1260 ND 0.2 1.00
PCB-1268 ND 0.2 1.00
LCS - EPA 8082
QC Sample ID: BYK0794-BS1 Batch: BYK0794
Date Prepared: 11/19/2024 Date Analyzed: 11/19/2024
PCB-1016 109 33 - 138 2.2 2.00 0.2 1.00
PCB-1260 100 43.6 - 141 2.0 2.00 0.2 1.00
Matrix Spike - EPA 8082
QC Sample ID: BYK0794-MS1 QC Source Sample: 24K1336-01Batch: BYK0794
Date Prepared: 11/19/2024 Date Analyzed: 11/19/2024
PCB-1016 114 28.5 - 137 2.5 ND 2.20 0.2 1.00
PCB-1260 107 32.1 - 139 2.4 ND 2.20 0.2 1.00
Matrix Spike Dup - EPA 8082
QC Sample ID: BYK0794-MSD1 QC Source Sample: 24K1336-01Batch: BYK0794
Date Prepared: 11/19/2024 Date Analyzed: 11/19/2024
PCB-1016 113 1.42 28.5 - 137 20 2.5 ND 2.20 0.2 1.00
PCB-1260 106 0.911 32.1 - 139 20 2.3 ND 2.20 0.2 1.00
CtF WO#: 24K1336
www.ChemtechFord.com Page 19 of 19