DERR-2025-006036

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

October 17, 2008

Mike Pecorelli
Environmental Scientist
Division of Environmental Response and Remediation
168 North 1950 West, 1st Floor
P.O. Box 144840
Salt Lake City, Utah 84114-4840

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 Mr. Pecorelli,

Please the attached report of groundwater monitoring activities completed in August of 2007 at
the Salt Lake City Fleet Management Yard (Figure 1). This report was previously issued to Salt
Lake City Corporation.

As you know, the City intends to move its fleet maintenance operations to a new location. The
exact timing of this move has not been formally scheduled, but may occur near the end of 2009.
In anticipation that some form of corrective action will be required when the USTs and fueling
area are decommissioned, the City would like to sample all wells during the next groundwater
monitoring event to provide up-to-date dissolved contaminant distribution data. Based on these
and other historical data, we anticipate that a corrective action approach, targeting ISLs as
appropriate cleanup goals, will be developed and submitted to DERR for consideration.

Please feel free to contact me if you have any questions regarding the attached report.

Best regards,

Rolf Lange
Certified UST Consultant #CC0012

Attached: Groundwater Monitoring Report
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 12, 2008

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 2007 at the Salt Lake City Fleet Management Yard (Figure 1). This report has been prepared
to provide a succinct summary of the most recent groundwater monitoring results and pertinent
historical data. Millennium Science and Engineering, Inc. (MSE) conducted field sampling
activities on August 27, 2008.

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 27, 2008 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 4 locations on the property: MW-1, MW-2, MW-3 and PZ-3. 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. 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 12, 2008
Page 2 of 2

TABLE 1
Summary of Survey and Static Water Elevation Data
Salt Lake City Fleet Management Yard
August 27, 2008
(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 7.18 88.59
MW-2 949.1 1001.0 95.54 6.99 88.55
MW-3 983.8 936.0 95.79 7.34 88.45
MW-4 1041.3 816.3 95.56 7.64 87.92
MW-5 1064.2 936.3 95.74 7.40 88.34
MW-6 1027.9 900.0 95.34 6.47 88.87
PZ-1 1021.0 1054.0 95.30 6.67 88.63
PZ-2 904.0 980.2 95.94 7.50 88.44
PZ-3 959.9 911.2 96.12 7.79 88.33
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.

Analytical results are summarized in Table 2 along with historical groundwater monitoring data
for reference. Groundwater elevation data in Table 2 is current for wells that currently being
monitored. MTBEXN concentrations were below the laboratory detection limits in samples
collected from MW-1 and MW-2 in August 2008. Benzene and Xylenes were detected at 0.87
mg/L and 0.049 mg/L, respectively in the sample collected from MW-3. Benzene was slightly
higher, but on the same order of magnitude as the concentration detected in 2007 in MW-3 and
above the initial screening level (ISL) and Tier 1 Screening Level (SL). Xylenes were slightly
lower, but on the same order of magnitude as the concentration detected in 2007 in MW-3 and
below both the ISL and the Tier 1 SL. Benzene was detected at 0.03 mg/L in the sample
collected from PZ-3. This concentration is lower than those detected during previous monitoring
events and is below the Tier 1 SL, but above the ISL.

Total Petroleum Hydrocarbons (TPH) was detected in all samples collected in August 2008.
Gasoline-range Organics (TPH-GRO) was below the ISL, Tier 1 SL, and the laboratory detection
limits in samples collected from MW-1 and MW-2. TPH-GRO was detected in samples collected
from MW-3 and PZ-3 at 1.7 mg/L and 1.3 mg/L, respectively. These concentrations are above
the ISL, but below the Tier 1 SL. Diesel-range Organics (TPH-DRO) was detected in all samples
collected in August 2008. TPH-DRO was detected at 32 mg/L in the sample collected from MW-
2. This concentration is higher than that detected in 2007, but generally below historical
concentrations detected in this well. TPH-DRO was detected at 4.0 mg/L in samples collected
from MW-1, MW-3, and PZ-3. It should be noted, however, that these are estimated values
between the method detection limit and laboratory detection limit, and that TPH-DRO was also
detected in the method blank in the same concentration, suggesting laboratory-induced
contamination of these samples.

Ms. Renee Zollinger MSE
September 12, 2008
Page 3 of 3

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

Figures

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
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
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
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
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

Tables
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
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 <0.20 G, 32 D B <0.010 <0.020 <0.020 <0.020 <0.020 <0.020
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
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, <0.50 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
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
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
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
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 D 1.3 0.0053 0.036 0.036 0.0076 <0.0020
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 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
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)

Laboratory Reports and
Chain-of-Custody Record