DERR-2025-006033

MSE Millennium Science & Engineering, Inc.
2319 South Foothill Drive, Suite 180
Salt Lake City, Utah, 84109
Phone: [phone]
Fax: [phone]
Environmental Science and Engineering Solutions for the 21st Century
September 9, 2009

Renee Zollinger
Environmental Program Manager
Salt Lake City Corporation
451 South State Street, Room 145
Salt Lake City, Utah 84111

Re: Groundwater Monitoring at the Salt Lake City Public Services Department Fleet
Management Yard, 325 West 800 South, Salt Lake City, Utah Facility Identification
No. 4000835, Release Site EIEQ

Dear Ms. Zollinger,

Please accept this letter as our report of groundwater monitoring activities completed in August
of 2009 at the Salt Lake City Fleet Management Yard (Figure 1). This report has been prepared
to provide a summary of the most recent groundwater monitoring results and pertinent historical
data. Millennium Science and Engineering, Inc. (MSE) conducted field sampling activities on
August 18, 2009.

Static water levels were measured in all on-site wells and piezometers to enable
estimation of the local groundwater gradient and flow direction. Groundwater elevation
measurements from August 18, 2009 are provided in Table 1. Figure 2 is a groundwater
elevation contour map that shows the groundwater flow direction beneath the site was
generally to the south in August 2008 with a localized deviation in the area of the tank
pit. The water table gradient was approximately 0.003 ft/ft across the site.

Groundwater samples were collected by Mr. Mark Lilly, a Certified Groundwater and Soil
Sampler (#GS0449), from all wells and piezometers. Prior to collecting each groundwater
sample, approximately three casing volumes of water were purged from the well. Each
groundwater sample was collected using a new disposable bailer and then transferred into three
40-milliliter volatile organic analysis (VOA) vials with zero headspace. Two 2-liter samples of
groundwater were also collected for TPH-DRO analysis. The sample containers were labeled,
sealed, and placed in a cooler with ice for transport to the laboratory.

Groundwater samples were submitted to American West Analytical Laboratories for analysis of
total petroleum hydrocarbons-gasoline range organics (TPH-GRO), benzene, toluene,
ethylbenzene, xylenes and naphthalene (BTEXN) and methyl tert-butyl ether (MTBE) according
to EPA SW846 Method 8260-W. Total petroleum hydrocarbons - diesel range organics (TPH-
DRO) were analyzed using EPA SW846 Method 8015B Modified. Sample custody was
documented from the time of sample collection through delivery to the laboratory.

Ms. Renee Zollinger MSE
September 9, 2009
Page 2 of 2

TABLE 1
Summary of Survey and Static Water Elevation Data
Salt Lake City Fleet Management Yard
August 18, 2009
(All data reported in feet)
Sampling
Location

Survey Coordinates
Depth to
Static Water
Level
Static
Groundwater
Elevation
East North Elevation
MW-1 930.3 975.6 95.77 7.44 88.33
MW-2 949.1 1001.0 95.54 7.24 88.30
MW-3 983.8 936.0 95.79 7.61 88.18
MW-4 1041.3 816.3 95.56 7.72 87.84
MW-5 1064.2 936.3 95.74 7.64 88.10
MW-6 1027.9 900.0 95.34 6.73* 88.61
PZ-1 1021.0 1054.0 95.30 4.18 91.12
PZ-2 904.0 980.2 95.94 7.72 88.22
PZ-3 959.9 911.2 96.12 8.08 88.04
Note: Elevations are referenced to the top center nut on a fire hydrant located 40 feet west of the
fueling station. The reference point was assigned an arbitrary elevation of 100 feet.
* Anomalous water level measurement, not used in mapping water table surface.

Analytical results are summarized in Table 2 along with historical groundwater monitoring data
for reference. MTBE concentrations were below the laboratory detection limits in all groundwater
samples. BTEXN concentrations were below laboratory detection limits in samples collected
from MW-4, MW-5, MW-6, PZ-1, and PZ-2. Benzene was detected above the DERR initial
screening level (ISL) in samples collected from MW-1, MW-2, MW-3, and PZ-3; and above the
Tier 1 screening level (SL) in samples collected from MW-1 and MW-3. Toluene was detected
above the ISL only in the sample collected from MW-1. Ethylbenzene, xylenes, and naphthalene
were below relevant screening levels in all groundwater samples.

Total Petroleum Hydrocarbons - Gasoline-range Organics (TPH-GRO) was present in samples
collected from MW-1, MW-2, MW-3, PZ-2 and PZ-3. TPH-GRO marginally exceeded the ISL in
samples collected from MW-1, MW-3 and PZ-3, but was below the Tier 1 SL in these samples.

Total Petroleum Hydrocarbons - Diesel-range Organics (TPH-DRO) was detected in all samples
except those collected from MW-4 and MW-5 and exceeded the ISL in samples collected from
MW-1, MW-2, MW-6, PZ-1, and PZ-2. Significant increases in TPH-DRO concentrations were
detected in samples collected from MW-6 and PZ-1 relative to historical data for these sampling
locations. A concentration of 37 mg/Kg in the sample collected from PZ-1 is unusual, as
historical data indicate samples from this location have been below laboratory detection limits
with respect to TPH-DRO. However, this is the first time that this piezometer has been sampled
since 2004. Suspended sediment was observed in the sample at the time of collection and by
the laboratory, which could help to explain this unusual detection. A concentration of 14 mg/Kg
was detected in the sample collected from MW-6, which appears anomalous, both with respect
to historical data and concentrations detected in nearby or surrounding wells. The laboratory
Ms. Renee Zollinger MSE
September 9, 2009
Page 3 of 3

found nothing in the QC data or analyst notes that would bring in to question the validity of the
reported data.

Historical groundwater concentrations were graphed for selected analytes in wells that are
currently being monitored to depict contaminant concentration trends. Figures 3 through 6
provide historical concentration trends for benzene, xylenes, naphthalene, and TPH detected in
samples collected from MW-1, MW-2, MW-3, and PZ-3.

Thank you for the opportunity to provide this service to Salt Lake City Corporation. Please feel
free to contact me with any questions regarding this report.

Best regards,

Rolf Lange
Certified UST Consultant #CC0012

Attached: Figure 1 – Site Location Map
Figure 2 – Groundwater Elevation Contour Map
Figures 3 through 6 - Concentration Trends for Selected Wells
Table 2 – Summary of Analytical Results for Groundwater Samples
Copies of Original Laboratory Reports and Chain-of Custody

MS
Millennium Science & Engineering

FIGURE 1 – SITE MAP

Source: USGS 7.5-Minute Series
Topographic Map
1963, Photorevised 1975
Scale 1:24,000

Project No. S490F

Salt Lake City Corporation
Fleet Management Yard
Salt Lake City, Utah
Approximate
Site Location

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
0
2
4
6
C
o
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
MW-2
MW-1
MW-3
PZ-3
FIGURE 3
Benzene Concentrations
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
0
1
2
3
4
5
6
7
8
C
o
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
MW-2
MW-1
FIGURE 4
Xylene Concentrations
MW-3
PZ-3
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
0
0.2
0.4
0.6
0.8
1
C
o
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
MW-2
MW-1
FIGURE 5
Naphthalene Concentrations
MW-3
PZ-3
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
0
100
200
300
400
500
C
o
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
MW-2
MW-1
FIGURE 6
TPH Concentrations
MW-3
PZ-3
TABLE 2
Summary of Analytical Results for Groundwater Samples
Salt Lake City Fleet Management Yard
Sample Date Analytical Parameters (mg/l
Location TPH B T E X N MTBE
1/20/1994 3.4 <0.005 <0.005 0.022 0.13 0.005 NA
8.21 11/10/1994 5.6 D 0.19 0.039 0.17 0.39 0.04 NA
7.53 2/16/1995 12 0.062 <0.005 0.22 1.1 0.052 NA
7.51 7/6/1995 190.0 G 3.3 4.8 0.64 3.6 0.67 NA
7.50 10/19/1995 59 D 1.1 <0.05 0.58 2.3 0.32 NA
7.57 1/23/1996 42 0.028 <0.010 0.36 1 0.23 NA
6.27 4/16/1996 28 0.02 <0.025 0.13 0.48 0.19 NA
5.85 7/30/1996 4.9 0.16 0.11 0.067 0.24 <0.10 NA
3.11 1/15/1997 0.87 D <0.005 <0.005 0.041 0.05 0.028 NA
MW-1 4.55 7/31/1997 1.4 <0.005 <0.005 0.013 0.014 0.016 <0.005
6.75 1/27/1998 10 0.3 <0.020 <0.020 <0.020 <0.040 <0.020
7.05 7/27/1998 4.8 1.5 E 0.31 <0.010 0.018 <0.020 <0.010
8.10 1/27/1999 4.8 1.8 0.15 <0.10 <0.10 <0.2 <0.10
7.94 1/21/2000 0.78 G, 0.083 D 2 0.11 <0.0020 0.0075 0.0078 <0.0040 <0.0020
7.86 7/11/2000 0.091 G, 0.025 D 2; <5.0 1 0.007 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
7.85 8/9/2001 7.6 D 0.03 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
7.54 8/1/2002 0.28 G, <0.50 D 0.1 0.004 0.026 0.011 0.0036 <0.0020
8.31 7/8/2003 13.0 G, 3.7 1.4 1 0.8 6.1 0.32 <0.04
8.43 8/13/2004 6.2 G, 12.0 2.4 0.51 0.12 0.83 0.053 <0.01
8.17 10/3/2005 3.8 G, 9.0 1.7 0.16 0.11 0.55 0.045 <0.020
6.90 7/26/2006 1.5 G, 14.0 0.56 0.35 0.033 0.17 0.01 <0.0020
6.95 7/11/2007 0.6 G, 1.9 D 0.4 0.075 <0.020 0.08 <0.020 <0.020
7.18 8/27/2008 <0.40 G, 4.0 D JB <0.020 <0.040 <0.040 <0.040 <0.040 <0.040
7.44 8/18/2009 1.9 G, 1.8 D 0.91 0.17 0.10 0.43 0.021 <0.0020
1/20/1994 8.1 <0.005 <0.005 <0.005 0.01 0.055 NA
7.95 11/10/1994 0.91 D 0.038 0.005 <0.005 <0.005 <0.010 NA
7.25 2/16/1995 480 <0.005 <0.005 <0.005 <0.005 <0.010 NA
3/13/95*63.0 D <0.010 <0.010 <0.010 <0.010 <0.020 NA
7.21 7/6/1995 22.0 G 1.6 7.5 1.2 7.1 0.18 NA
7.19 10/19/1995 9.1 G 0.62 0.97 0.53 3 0.12 NA
7.28 1/23/1996 15 <0.010 <0.010 0.12 0.24 0.066 NA
5.97 4/16/1996 6.5 <0.005 <0.005 0.019 0.11 0.034 NA
5.55 7/30/1996 5.1 0.06 0.074 <0.05 0.23 0.18 NA
MW-2 2.85 1/15/1997 1.8 D <0.002 <0.002 <0.002 <0.002 <0.004 NA
4.37 7/31/1997 21 <0.005 <0.005 <0.005 <0.005 <0.010 <0.005
6.58 1/27/1998 4.8 0.005 <0.005 <0.005 <0.005 <0.010 <0.005
6.85 7/28/1998 1.4 0.15 <0.020 <0.020 <0.020 <0.040 <0.020
7.92 1/27/1999 1.6 0.39 0.11 <0.10 <0.10 <0.2 <0.10
7.76 1/21/2000 0.32 G, 0.36 D 2 0.034 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
7.66 7/11/2000 0.17 G, 0.79 D 2; 49.0 1 0.0053 <0.0020 <0.0020 0.0039 <0.0040 <0.0020
7.69 8/9/2001 26 D <0.0010 <0.0020 <0.0020 0.0034 <0.0020 <0.0020
7.36 8/1/2002 0.59 G, 71.0 D 0.033 0.0032 <0.0020 <0.0020 <0.0020 <0.0020
8.02 7/8/2003 0.077 G, 35.0 D 0.053 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
8.36 8/13/2004 3.9 G, 90.0 D 2.1 1 0.054 0.58 <0.02 <0.02
7.97 10/3/2005 1.2 G,99 D 0.53 0.10 0.020 0.27 <0.020 <0.020
6.70 7/26/2006 0.32 G,260 D 0.21 0.11 <0.020 <0.020 <0.020 <0.020
6.76 7/11/2007 0.066 G, 4.8 D 0.066 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
6.99 8/27/2008 <2.0 G, 32 D B <0.010 <0.020 <0.020 <0.020 <0.020 <0.020
7.24 8/18/2009 0.19 G, 6.4 D 0.18 0.0035 0.0046 0.0032 <0.0020 <0.0020
1/20/1994 17 1.9 0.28 0.56 1.3 0.28 NA
8.37 11/10/1994 0.22 Feet Free Phase Product Sampled G NA
7.65 2/16/1995 18.0 G 2.1 0.12 0.61 0.72 0.1 NA
7.84 7/6/1995 3.7 G 1 0.074 0.23 0.39 0.092 NA
7.95 10/19/1995 4.2 G 1.1 0.52 0.31 0.26 0.064 NA
7.73 1/23/1996 3 0.49 <0.060 0.2 0.16 <0.12 NA
6.95 4/16/1996 7.5 2.1 0.27 0.55 1.3 0.11 NA
6.68 7/30/1996 2.8 1.6 <0.05 0.21 0.62 0.1 NA
4.41 1/16/1997 6.6 G 3.3 0.12 0.4 0.8 <0.20 NA
MW-3 5.03 7/31/1997 7.9 3.9 0.15 0.83 1.3 0.39 <0.10
7.16 1/27/1998 8.5 2.8 E 0.11 0.98 0.53 0.16 <0.020
7.32 7/27/1998 7.7 2.7 E 0.052 0.36 0.6 0.13 <0.020
7.46 1/27/1999 4.7 2.6 <0.10 0.1 0.24 <0.2 <0.10
8.09 1/21/2000 4.3 G, 0.30 D 2 2.4 0.024 0.044 0.10 0.016 0.0033
7.96 7/11/2000 1.2 G, 0.84 D 2; <5.0 1 0.4 0.014 0.023 0.072 0.026 0.0046
8.46 8/9/2001 <5.0 D 1.6 0.026 0.017 0.071 0.03 <0.0020
7.82 8/1/2002 2.3 G, <0.50 D 1.0 0.017 0.022 0.062 0.017 <0.0020
8.48 7/8/2003 1.9 G, 1.1 1.2 0.022 0.017 0.061 0.027 <0.0020
8.63 8/13/2004 2.1 G, 1.0 1.3 0.031 0.011 0.077 0.033 <0.01
8.33 10/3/2005 2.5 G, <0.50 D 1.5 0.024 <0.020 0.086 0.034 <0.020
7.18 7/26/2006 3.5 G, 1.6 1.8 0.036 0.03 0.15 0.098 <0.020
7.21 7/11/2007 2.6 G, 1.2 0.79 0.022 <0.020 0.08 0.021 <0.020
7.34 8/27/2008 1.7 G, 4.0 D JB 0.87 <0.020 <0.020 0.049 <0.020 <0.020
7.61 8/18/2009 1.9 G, 0.98 D 1.20 <0.020 <0.020 0.076 0.04 <0.020
Depth to GW
(feet)
TABLE 2
Summary of Analytical Results for Groundwater Samples
(continued)
Sample Date Analytical Parameters (mg/l
Location TPH B T E X N MTBE
6/8/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
9.20 11/10/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
8.93 2/16/1995 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
8.84 7/6/1995 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
9.06 10/19/1995 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
9.07 1/23/1996 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
8.73 4/16/1996 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
MW-4 8.48 7/30/1996 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
6.88 1/15/1997 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
7.57 7/31/1997 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 0.010
8.81 1/27/1998 <0.02 <0.001 <0.002 <0.002 <0.002 <0.004 0.012
8.20 7/27/1998 <0.02 <0.001 <0.002 <0.002 <0.002 <0.004 0.009
1/1/2699 <0.02 <0.001 <0.002 <0.002 <0.002 <0.004 0.008
8.84 1/21/2000 0.022 G, <0.020 D 2 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 0.0031
8.88 7/11/2000 <0.02 G, < 0.02 D 2; <5.0 1 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
9.08 8/9/2001 <5.0 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 0.0028
8.96 8/1/2002 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
9.24 7/8/2003 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
9.51 8/13/2004 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
7.25 7/29/2005 <0.020 G, <0.050D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
7.72 8/18/2009 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
6/8/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
11/10/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
2/16/1995 NA NA NA NA NA NA NA
7/6/1995 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
10/19/1995 NA NA NA NA NA NA NA
1/23/199 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 N
4/16/199 N N N N N N N
MW-5 7/30/199 N N N N N N N
1/16/199 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 N
7/31/199 <0.02 0.003 <0.002 <0.002 <0.002 <0.004 0.002
1/27/199 <0.02 0.007 <0.002 <0.002 <0.002 <0.004 0.002
7/27/199 0.05 <0.001 <0.002 <0.002 <0.002 <0.004 <0.002
1/26/199 0.068 <0.001 <0.002 <0.002 <0.002 <0.004 <0.002
1/21/200 0.11 G <0.020 D 2 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
7/11/2000 <0.020 G, <0.020 D 2; <5.0 1 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
8/9/2001 <5.0 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
8/1/2002 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
7/8/2003 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
8/13/2004 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
7.64 8/18/2009 <0.020 G, <0.50 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
6/8/1994 3.7 G,D 1.1 0.015 0.03 0.079 0.036 NA
11/10/1994 0.95 G 0.55 0.003 0.01 0.006 <0.004 NA
2/16/1995 0.73 0.37 <0.005 <0.005 0.021 <0.010 NA
7/6/1995 1.2 0.83 <0.002 <0.002 0.027 0.045 NA
10/19/1995 0.97 G 0.5 0.006 0.008 0.025 0.02 NA
1/23/1996 0.92 0.71 <0.020 <0.020 <0.02 <0.040 NA
4/16/1996 2.7 1.2 0.006 0.019 0.03 0.073 NA
MW-6 7/30/1996 3.2 1 0.009 0.035 0.11 0.15 NA
1/16/1997 5.8 G 1.4 <0.020 0.14 0.21 0.092 NA
7/31/1997 2.7 0.82 0.023 0.067 0.40 0.12 0.034
1/27/1998 4.1 1.0 E 0.011 0.061 0.55 0.12 0.053
7/28/1998 0.34 0.27 E <0.002 0.005 0.015 0.005 0.006
1/27/1999 2.7 1.7E <0.002 <0.002 0.062 0.042 0.035
1/21/2000 0.57 G, <0.020 D 2 0.30 E <0.0020 0.0042 0.0077 0.014 0.0064
7/11/2000 0.15 G, 0.021 D 2; <5.0 1 0.058 <0.0020 <0.0020 <0.0020 <0.0040 0.0095
8/9/2001 <5.0 D 0.011 <0.0020 <0.0020 <0.0020 0.0023 0.0013
8/1/2002 0.043 G, 3.0 D 0.0029 0.0074 0.0021 0.011 <0.0020 <0.0020
7/8/2003 <0.020 G, <0.50 D 0.0058 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
8/13/2004 <0.020 G, <0.50 D 0.0077 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
6.73 8/18/2009 <0.20 G, 14 D <0.010 <0.020 <0.020 <0.020 <0.020 <0.020
11/11/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
7/27/1998 <0.02 <0.001 <0.002 <0.002 <0.002 <0.004 <0.002
1/26/1999 0.057 <0.001 <0.002 <0.002 <0.002 <0.004 <0.002
PZ-1 8/1/2002 <0.020 G, <0.50 D <0.001 <0.002 <0.002 <0.002 <0.002 <0.002
7/8/2003 0.029 G, <0.50 D <0.001 <0.002 <0.002 <0.002 <0.002 <0.002
8/13/2004 <0.020 G, <0.50 D <0.001 <0.002 <0.002 <0.002 <0.002 <0.002
4.18 8/18/2009 <0.020 G, 37 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
11/11/1994 <0.02 <0.002 <0.002 <0.002 <0.002 <0.004 NA
7/28/1998 0.023 0.02 <0.002 <0.002 <0.002 <0.004 <0.002
1/21/2000 0.14 G, <0.020 D 2 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 0.0033
PZ-2 7/11/2000 <0.020 G, <0.020 D 2; <5.0 1 <0.0010 <0.0020 <0.0020 <0.0020 <0.0040 <0.0020
Depth to GW
(feet)
8/1/2002 0.06 G, <0.50 D 0.011 <0.0020 0.0028 0.0024 <0.0020 <0.0020
7/8/2003 0.23 G, <0.50 D 0.15 0.0089 <0.0020 <0.0020 <0.0020 <0.0020
8/13/2004 1.6 G, 3.2 1.3 0.0053 0.036 0.036 0.0076 <0.0020
7.72 8/18/2009 0.078 G, 1.4 D <0.0010 <0.0020 <0.0020 <0.0020 <0.0020 <0.0020
TABLE 2
Summary of Analytical Results for Groundwater Samples
(continued)
Sample Date Analytical Parameters (mg/l
Location TPH B T E X N MTBE
6/8/1994 18.0 G,D 1.1 0.1 0.64 0.85 0.19 NA
8.97 11/11/1994 18.0 G 5.1 0.24 2.5 1.1 1 NA
5.76 7/31/1997 7.7 0.3 0.065 0.46 0.6 0.31 <0.010
7.77 1/27/1998 4.5 0.16 0.033 0.39 0.32 0.25 <0.020
7.90 7/28/1998 9.9 0.82 0.11 0.43 0.49 0.36 <0.020
PZ-3 8.85 1/26/1999 8.4 1.1E 0.077 0.52 0.29 0.25 <0.020
8.61 1/21/2000 4.8 G, 0.040 D 2 0.50 0.041 0.39 0.28 0.20 0.0040
8.60 7/11/2000 0.98 G, <0.20 D 2; <5.0 1 0.22 <0.020 0.089 0.11 0.073 <0.0020
8.54 8/9/2001 NA NA NA NA NA NA NA
8.44 8/1/2002 1.9 G, 1.7 0.13 0.027 0.054 0.14 0.10 <0.0020
9.03 7/8/2003 0.79 G, <0.50 D 0.13 <0.040 <0.040 0.043 0.052 <0.040
9.08 8/13/2004 2.7 G, 1.5 0.41 0.037 0.12 0.14 0.082 <0.0020
8.89 10/3/2005 1.3 G, 0.58 D 0.13 <0.020 <0.020 0.61 0.060 <0.020
7.46 7/26/2006 1.9 G, 1.3 0.18 0.021 0.023 0.10 0.11 <0.0020
7.42 7/11/2007 1.8 G, 1.2 0.15 <0.020 <0.020 0.069 0.031 <0.020
7.79 8/27/2008 1.3 G, 4.0 D JB 0.03 <0.020 <0.020 <0.020 <0.020 <0.020
8.08 8/18/2009 1.1 G, 0.73 D 0.044 0.031 0.10 0.12 0.088 <0.020
11/1/2005 3 1 0.005 1 0.7 10 0.7 0.2
11/1/2005 3 10 0.3 3 4 10 0.7 0.2
na na 2.0 >sol >sol >sol >sol 29000.0
Notes:
ISLs - Initial Screening Levels (DERR) na - not applicable
Tier 1 SLs - Tier 1 Screeing Levels (DERR) * - Well re-sampled to verify previous analytical result
SSCLs- Site-Specific Cleanup Levels (MSE) E- Estimated value, exceeds linear working range
G - Gasoline-Range Hydrocarbons (C6-C10) of instrument
D - Diesel-Range Hydrocarbons (C10-C28)Bold- exceeds relevant screening leve
>sol - Risk-based concentration greater than contstituent 1 - TPH by Method 8015B Modified
solubility in water 2 - TPPH by Method 8260
NA - Not Analyzed 3 - Updated 5/16/2006
J - Estimated value between the MDL and reporting limit. Results accurate to one significant figure. B - Analyte detected in method blank <PQL at 4.113248 mg/L
Tier I SLs
Tier II SSCLs
ISLs
Depth to GW
(feet)