WI-1116_11608_M_RPTS_20180323

2725 East Millbrook Road
Suite 121
Raleigh, NC 27604
Tel: [phone]
Fax: [phone]
www.atcgroupservices.com
N.C. Engineering License No. C-1598

March 23, 2018

Mr. Al Chapman
State of North Carolina
Department of Environmental Quality
Division of Waste Management, Superfund Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

RE: Groundwater Monitoring Report
Coastal Dry Cleaners
628 Corbett Avenue
Swansboro, Onslow County, North Carolina
DSCA Site Identification No. DC670003

Dear Mr. Chapman:

ATC Associates of North Carolina, P.C. (ATC) has completed groundwater and soil gas monitoring
activities at the above referenced site under contract to the North Carolina Drycleaning Solvent Cleanup
Act (DSCA) Program. The DSCA Program’s Groundwater Monitoring Report Forms and Analytical Data
Tables with required attachments are enclosed to document the results of the monitoring. This report
documents one groundwater monitoring event performed in December 2017 and one soil gas sampling
event completed in January 2018.

If you have questions or require additional information, please do not hesitate to contact Ashley
Winkelman at [phone].

Sincerely,
ATC Associates of North Carolina, P.C.
Kristen Speight, P.G. Ashley M. Winkelman, P.G.
Project Manager Program Manager

GROUNDWATER MONITORING REPORT
Coastal Dry Cleaners
628 Corbett Avenue
Swansboro, Onslow County, North Carolina
DSCA Site Identification No. DC670003

GROUNDWATER MONITORING REPORT FORMS

DSCA ID No.:
Submittal Date:
Reporting Period:to
Type of Report:One-Time Event Quaterly
Semi-Annual Annual
Dec-17 Dec-17
Groundwater Monitoring Report Forms
for
North Carolina Dry-Cleaning Solvent Cleanup Act Program
Prepared By:
Facility Name:Coastal Dry Cleaners
628 West Corbett Avenue, Swansboro, Onslow County, North Carolina
2725 East Millbrook Road, Suite 121, Raleigh, North Carolina 27604
ATC Associates of North Carolina, P.C.
March 23, 2018
DC670003
Table of Contents
DSCA ID No.: DC670003
Form/Att
. No.
Check box
if included
Form 1 Report Summary
Form 2 Quality Assurance/Quality Control Procedures
Form 3 Results, Conclusions and Recommendations
Att. 1
Att. 2
Att. 3
Att. 4
Att. 5
Disposal of IDW receipts from receiving facilities, or any required harzardous waste
GWMR TOC
Description
Grooundwater Monitoring Report Attachments
Groundwater Monitoring Report Forms
Report Summary
DSCA ID No.: DC670003
Dates samples were collected:
Number of existing monitoring wells:
List the sampled monitoring wells:
List the sampled water supply wells:
List surface water samples collected:
Date analyses were performed:
Were any holding times exceeded?
Dates monitoring/supply wells were gauged:
disposal?
Average depth to groundwater:
Groundwater flow direction:
Was the static groundwater level above the top of the well screen in any wells?
If Yes, indicate which wells:
Is the aquifer:
Were any existing monitoring wells damaged?
If Yes, indicate which wells:
Has the groundwater plume been defined?
Any ongoing assessment activities?
If Yes, provide details in the space below:
Any ongoing remediation activites?
If Yes, provide details in the space below:
Any significant changes in the subsurface conditions?
If Yes, provide details in the space below:
Tetrachloroethylene (PCE) concentrations decreased to below the Title 15A .0202 2L Standard (2L Standard)
in monitoring wells MW-38A and MW-41 during the recent sampling event.
and MW-44
12/26/17 through 12/28/17
West
MW-7B, MW-7C, MW-15B, MW-15C, MW-17, MW-23, MW-24A, MW-24B,
N/A
N/A
MW-24C, MW-29, MW-35B, MW-35C, MW-36B, MW-36C, MW-37A, MW-37B, MW-37C, MW-38B, MW-38C and MW-39
11.37 feet
12/26/17 through 12/27/17
39
MW-8, MW-14, MW-29, MW-36A, MW-38A, MW-39, MW-41,
1/3/2018
Does investigation derived waste (IDW) generated during these activities still remain at the site pending
GWMR Form 1
Yes No
Yes No
Confined Unconfined Perched
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Quality Assurance/Quality Control Procedures
DSCA ID No.: DC670003
Describe the specific sampling technique employed during the collection of all ground water samples.
The EPA approved method for VOC analysis used to run groundwater and surface water samples from the site
is SW846 8260B. Samples are directly injected into a gas chromatograph (GC) and then introduced directly to
a capillary column where they are flash evaporated for analysis. The column is temperature-programmed to
separate the analytes, which are then detected with a mass spectrometer (MS) interfaced to the GC. The holding
time for VOC analysis via EPA method 8260B is 14 days from collection to analysis.
GWMR Form 2
Describe the standard quality assurance/quality control (QA/QC) procedures which are practiced in order to
ensure that the samples are representative of actual conditions and that analytical results are valid.
Describe the EPA approved methods used to extract and analyze the samples submitted the laboratory.
Reference the maximum holding time for each type of analysis performed.
Standard low flow sampling procedures and methods were utilized for sampling groundwater at the site.
Groundwater samples for volatiles analysis were collected in three 40 milliliter vials preserved with
hydrochloric acid and filled to zero headspace for each monitoring well. Each sample was then placed in an ice
filled cooler. A chain-of-custody form was completed for the sampling event and accompanied the samples to
the laboratory. Chemical analyses were performed on groundwater samples by Contest Analytical Laboratory
(Contest) in East Longmeadow, Massachusetts. All groundwater and surface water samples were analyzed for
volatile organic compounds (VOCs) by EPA Method 8260B.
Groundwater samples were collected using low flow sampling methods. Well purging and sampling were
completed using a GeoTech peristaltic pump. The polyethylene tubing was replaced at each monitoring well
location prior to sampling. Field parameters, including pH, oxidation/reduction potential, specific conductivity,
dissolved oxygen, and temperature, were measured every three to five minutes using a YSI multimeter and flow-
through cell. Before obtaining a sample, field parameters were allowed to stabilize within EPA guidelines to
ensure a representative groundwater sample was collected.
Results, Conclusions and Recommendations
DSCA ID No.: DC670003
Sampling
Date Sample ID Concentration
[mg/L]
Sampling
Date Sample ID Concentration
[mg/L]
12/26/2017 MW-14 3 1/28/2009 MW-7 8.6
12/26/2017 MW-14 0.26 1/29/2009 MW-8 0.32
NA NA ND 8/18/2009 MW-17 0.0036
12/26/2017 MW-14 0.67 10/25/2012 MW-4 3.5
12/26/2017 MW-29 0.027 1/23/2008 MW-29 0.46
12/26/2017 MW-29 0.42 3/15/2010 MW-15A 0.76
12/26/2017 MW-29 0.026 3/15/2010 MW-15A 11
12/26/2017 MW-29 0.63 3/15/2010 MW-15A 2.4
12/26/2017 MW-29 0.782 3/15/2010 MW-15A 12.6
Historical assessment activities identified a plume of groundwater impacted by chlorinated solvent constituents extending
approximately 900 feet to the west in the downgradient direction. The most recent sampling event indicated
concentrations of PCE, trichloroethylene (TCE), and cis-1,2-dichloroethylene (DCE) above NC 2L Standards. Numerous
petroleum compounds were also detected above NC 2L Standards; however, they are not likely associated with the dry-
cleaning release. An injection event was conducted in September 2009 to remediate source area groundwater. An SVE
system was also operational from August 2009 through February 2011 to remediate source area soil. These remediation
efforts have resulted in significant reductions in contaminant concentrations in the source area. The downgradient plume
extent appears to be stable and adequately defined. Surface water samples contained vinyl chloride concentrations above
the 2B Surface Water Standard during one sampling event in August 2009. However, vinyl chloride was detected in the
upstream sample and therefore it can be concluded that the source is not the release at the subject site. No exceedances
were identified in surface water samples collected during subsequent sampling events in 2009 and 2010. The results of the
recent groundwater sampling event indicate reductions of contaminant concentrations in the monitoring wells sampled.
The results of the soil gas sampling indicate significant reductions in PCE concentrations in the off-site samples collected.
GWMR Form 3
Results
Maximum Concentration Detected in Groundwater
Chemical
Most Recent Event Detected at Site To-date
Tetrachloroethylene
Trichloroethylene
Vinyl Chloride
The primary barrier to site closure is off-site soil gas impacts above acceptable risk levels for a resident.
Sampling has confirmed exceedances of current vapor intrusion risk for the existing off-site structures. ATC
recommends periodic groundwater and soil gas sampling to monitor contaminant concentrations.
cis-1,2-DCE
Benzene
Naphthalene
Toluene
Ethylbenzene
Total Xylenes
Instructions: Discuss any trends or changes noted in analytical results.
Conclusions
Recommendations
ATTACHMENT 1

DISPOSAL DOCUMENTATION FOR INVESTIGATIVE DERIVED WASTE

ANALYTICAL DATA TABLES

DSCA ID No.:
Submittal Date:
Analytical Data Tables
for
North Carolina Dry-Cleaning Solvent Cleanup Act Program
Prepared By:
Facility Name:Coastal Dry Cleaners
628 West Corbett Avenue, Swansboro, Onslow County, North Carolina
2725 East Millbrook Road, Raleigh, North Carolina 27604
ATC Associates of North Carolina, P.C.
March 23, 2018
DC670003
Table of Contents
DSCA ID No.: DC670003
Table/
Att. No.
Check box
if included
Table 1 Site Chronology
Table 2 Analytical Data for Soil
Table 3 Analytical Data for Sub-slab Gas
Table 4 Analytical Data for Soil Gas
Table 5 Analytical Data for Indoor and Outdoor Air
Table 6 Monitoring Well Construction Data
Table 7 Groundwater Elevation Data
Table 8 Analytical Data for Groundwater
Table 9 Analytical Data for Surface Water
Table 10 Water Well(s) Survey Data
Table 11 Analytical Data for Water Supply Well(s)
Table 12 Analytical Data for Natural Attenuation Parameters
Att. 1 Site map showing location(s) of soil boring(s).
Att. 2
Att. 3 Soil isoconcentration maps.
Att. 4 Site map showing location(s) of monitoring well(s).
Att. 5
Att. 6 Groundwater gradient map for each sampling event.
Att. 7
Att. 8
Att. 9 Map showing location(s) of surface water sample(s) (if applicable).
Att. 10
Att. 11
Att. 12
Att. 13
Att. 14 Air and soil gas concentration map showing the concentration at each sampling point.
Att. 15
Att. 16
Att. 17
Att. 18
Att. 19
Att. 20
Att. 21
Note:
1. All maps must include a bar scale, north arrow, site name, DSCA ID No., and date.
Soil Gas Risk Calculators
USGS Quad map with plotted water well location(s) within the 1,500 foot and 0.5
mile radii of the site (if applicable).
Signed laboratory analytical reports including chain-of custody and quality
assurance/quality control (QA/QC) documentation (only if not previously
submitted).
Soil contaminant concentration maps showing the concentration at each sampling
point.
Site map showing location(s) of indoor air, outdoor air, or soil gas samples.
Well completion diagrams and records of construction submitted to state.
PCE concentration map showing the concentration at each sampling point and
isoconcentration map. However, if there are significant plumes for other dry-
cleaning contaminants, contaminant concentration maps for each chemical of
concern should be included.
Surface water concentration map showing the concentration at each sampling
point (if applicable).
Site map showing location(s) of monitoring well(s) for natural attenuation paramete
ADT TOC
Description
Attachments
Tables
Groundwater concentration trend plots.
Table 1: Site Chronology
DSCA ID No.: DC670003
Chronology of Events
1970's Drycleaning operations began at the site (owned by Coastal Drycleaners). Property was bought and sold several times over
the next 30 years until Coastal Drycleaners ceased operations in 2006.
12/1/1993 Petroleum hydrocarbons were discovered at a nearby former gas station (Stanley Oil Company property) during the removal
of two underground storage tanks on the adjacent property. The release was assigned NCDENR Incident #11608.
2/15/1994 Monitoring well MW-1 (inactive) was installed at the nearby gas station to check for the presence of free product in the
vicinity of the former UST.
2/24/1994 The presence of free product was confirmed at the nearby gas station and monitoring wells MW-2 (inactive), MW-3
(inactive), and MW-4 were installed to determine the extent of the free product plume.
11/1/1994
Monitoring wells MW-5 (inactive), MW-6 (inactive), MW-7, MW-8, MW-9 (inactive), MW-10 (inactive), MW-11, MW-
12 (inactive), and MW-13 (inactive) were installed to evaluate the extent of groundwater impact associated with the nearby
gas station release. Tetrachloroethylene (PCE) was identified in well MW-7 at a concentration of 31,300 ug/L. The PCE
was attributed to possible releases of drycleaning solvent rather than the petroleum release at the nearby gas station.
1/11/1995
In response to petroleum free product being detected in monitoring wells MW-9 and MW-12 at the nearby gas station site,
additional monitoring wells MW-14, MW-15, and MW-16 (inactive) were installed to determine the extent of the free
product plume. Monitoring wells MW-17, MW-18 (inactive), MW-19 (inactive), MW-20 (inactive), MW-21 (inactive),
MW-22 (inactive), MW-23, and MW-24 were also installed to determine the extent of groundwater impact associated with
the petroleum release. PCE was detected in wells MW-15 through MW-24. These wells are located downgradient of the
former Coastal Drycleaners facility and the PCE was attributed to possible releases of drycleaning solvents.
3/23/1995 Groundwater Management Associates, Inc. (GMA) prepared a Comprehensive Site Assessment Report regarding the former
gas station for Tom Potter Oil Company, Inc. (owner of the gas station site).
6/26/1995
Monitoring wells MW-25 (inactive), MW-26 (inactive), MW-27 (inactive), MW-28 (inactive), MW-29, and MW-30 were
installed to further delineate the free product plume and determine the extent of groundwater impact associated with the
petroleum release.
12/30/1997
GMA conducted a check of free product levels in the existing monitoring wells associated with the petroleum release. The
results of the product check were documented in a Free Product Removal Report dated January 16, 1998. The report
indicates that the site is being referred to the NC Division of Solid and Hazardous Waste, assumably due to the PCE
detections. This is the most recent report located by ATC for the petroleum release.
11/1/2006 Coastal Drycleaners vacated site and drycleaning operations ceased.
9/18/2007 Former Coastal Dry Cleaners was accepted into the Drycleaning Solvent Cleanup Act (DSCA) Program.
12/18/2007
ATC advanced direct push soil borings SB01 through SB13 to evaluate the extent of impacted soil and groundwater. PCE
was detected in soil samples SB01 through SB04 and SB06 through SB13 above the lowest Tier 1 Risk-Based Screening
Levels (RBSLs). Groundwater collected from SB01, SB08, SB10, and SB11 contained PCE above the NC 2L Standard.
Instructions: Brief description of all significant events that have occurred since a problem was
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
Date
ADT 1
Page 1 of 4
Table 1: Site Chronology
DSCA ID No.: DC670003
Chronology of Events
Instructions: Brief description of all significant events that have occurred since a problem was
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
Date
ADT 1
1/23/2008
ATC collected groundwater samples from montioring wells MW-4, MW-7, MW-8, MW-11, MW-14, MW-15A, MW-17,
MW-23, MW-24A, MW-29, and MW-30. ATC also advanced direct push soil borings SB-14 through SB-19, direct push
groundwater sampling points DP-01 through DP-06, and membrane interface probe borings MP-01 through MP-10 to
evaluate the extent of impacted soil and groundwater. Soil collected from SB-15 contained PCE above the lowest Tier 1
RBSLs. Groundwater samples collected from MW-4, MW-7, MW-8, MW-14, MW-15A, MW-17, MW-23, MW-24A, DP-
02, DP-03, DP-06, MP-03, MP-06, MP-08, and MP-09 contained PCE above the NC 2L Standard.
5/23/2008
ATC installed and sampled monitoring wells MW-7B, MW-7C, MW-15B, MW-15C, MW-24B, MW-24C, MW-31, MW-
32, MW-33, MW-34, MW-35A, MW-35B, MW-35C, MW-36A, MW-36B, MW-36C, MW-37A, MW-37B, MW-37C,
MW-38A, MW-38B, MW-38C, MW-39, MW-40, MW-41, and MW-42 to evaluate the extent of impacted groundwater.
ATC also collected a midstream and downstream surface water sample from the unnamed creek in the site vicinity. PCE
was detected in monitoring wells MW-7B, MW-24B, MW-32, MW-36A, MW-37A, MW-37B, MW-38A, and MW-41
above NC 2L Standards.
8/14/2008
ATC installed and sampled monitoring wells MW-44 and MW-45 to delineate the extent of impacted groundwater. ATC
also collected three surface water samples, Midstream, Downstream, and Upstream, from the nearby surface water body.
PCE was not detected above the NC 2L Standard.
11/25/2008 ATC submitted an Assessment Report documenting the assessment activities conducted between December 2007 and
August 2008.
1/19/2009-1/26/2009
ATC installed MW-43 inside the former drycleaning building and sampled monitoring wells MW-7, MW-7B, MW-7C,
MW-8, MW-15B, MW-15C, MW-24A, MW-24B, MW-24C, MW-29, MW-31 through MW-34, MW-35A, MW-35B, MW-
35C, MW-36A, MW-36B, MW-36C, MW-37A, MW-37B, MW-37C, MW-38A, MW-38B, MW-38C, MW-39 through
MW-45 and surface water samples Midstream, Downstream, and Upstream. PCE was detected in monitoring wells MW-7,
MW-7B, MW-8, MW-15B, MW-24A, MW-24B, MW-31, MW-32, MW-35A, MW-35B, MW-36A, MW-36B, MW-36C,
MW-37A, MW-38A, MW-38B, MW-41, and MW-43 above the NC 2L Standard. ATC also installed and sampled soil gas
monitoring points SGMP-1 through SGMP-6. Soil gas sampling was conducted to evaluate the risk of vapor intrusion into
downgradient residential structures.
3/23/2009-3/27/2009 ATC installed four injection wells (MW-B1 through MW-B4) and four soil vapor extraction wells (SVE-1 through SVE-4).
3/25/2009
ATC submitted a report documenting the soil gas monitoring point sampling data collected on January 2009. The report
concluded that there is no significant risk of vapor intrusion into downgradient residential structures. However, note that
the DSCA Program later changed their vapor intrusion assessment protocol and additional sampling was deemed warranted
as discussed below.
4/20/2009
ATC sampled monitoring wells MW-7, MW-7B, MW-7C, MW-8, MW-14, MW-15B, MW-15C, MW-23, MW-24A, MW-
24B, MW-24C, MW-29, MW-31 through MW-34, MW-35A, MW-35B, MW-35C, MW-36A, MW-36B, MW-36C, MW-
37A, MW-37B, MW-37C, MW-38A, MW-38B, MW-38C, MW-39 through MW-45 and collected surface water samples
Midstream, Downstream, and Upstream. PCE was detected in monitoring wells MW-7, MW-7B, MW-8, MW-14, MW-
15B, MW-15C, MW-23, MW-24A, MW-24B, MW-29, MW-31, MW-32, MW-36A, MW-37A, MW-38A, MW-41, and
MW-43 above the NC 2L Standard.
8/3/2009 A soil vapor extraction (SVE) system began operation on-site to remediate impacted soil.
8/20/2009
ATC sampled monitoring wells MW-4, MW-7, MW-7B, MW-7C, MW-8, MW-11, MW-15B, MW-17, MW-23, MW-24A,
MW-24B, MW-29, MW-31, MW-32, MW-37A, MW-37B, MW-38A, MW-38B, and MW-43 and collected surface water
samples Midstream, Downstream, and Upstream. PCE was detected in monitoring wells MW-4, MW-7, MW-24A, MW-
24B, MW-32, MW-37A, MW-38A, and MW-43 above the NC 2L Standard. Vinyl chloride was detected above the 2B
Surface Water Standard in the Midstream and Upstream samples.
Page 2 of 4
Table 1: Site Chronology
DSCA ID No.: DC670003
Chronology of Events
Instructions: Brief description of all significant events that have occurred since a problem was
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
Date
ADT 1
9/22/2009-9/29/2009
ATC and Innovative Environmental Technologies, Inc. (IET) performed an injection event at the site. Duing the injection
event, approximately 9,030 gallons of injection mixture were injected into 27 direct-push borings and inejction wells MW-
B1 through MW-B4. The results of the injection event are documented in an Injection Evaluation Report submitted in
March 2011.
10/14/2009 ATC submitted a System Startup Letter. The letter documents details regarding the SVE system installation and start up.
10/14/2009
ATC sampled monitoring wells MW-4, MW-7, MW-7B, MW-7C, MW-8, MW-11, MW-14, MW-15B, MW-17, MW-23,
MW-29, MW-31, MW-32, and MW-43. PCE was detected in monitoring wells MW-4, MW-7, MW-8, MW-14, MW-23,
MW-32, and MW-43 above the NC 2L Standard.
12/15/2009
ATC sampled monitoring wells MW-4, MW-7, MW-7B, MW-7C, MW-8, MW-14, MW-15B, MW-15C, MW-23, MW-
24A, MW-24B, MW-24C, MW-29, MW-31 through MW-34, MW-35A, MW-35B, MW-35C, MW-36A, MW-36B, MW-
36C, MW-37A, MW-37B, MW-37C, MW-38A, MW-38B, MW-38C, MW-39 through MW-45 and collected surface water
samples Midstream, Downstream, and Upstream. PCE was detected in monitoring wells MW-4, MW-7, MW-8, MW-14,
MW-23, MW-24B, MW-32, MW-36A, MW-37A, MW-38A, MW-41, and MW-43 above the NC 2L Standard.
12/15/2009
ATC collected two sub-slab soil gas samples (SGMP-1 and SGMP-2) and three air samples (Indoor #1, Indoor #2, and
Outdoor) at the subject site. The indoor air samples showed no exceedences of the risk levels considered acceptable by the
DSCA Program.
2/10/2010 The SVE system was shut down based on the December sampling data showing no unacceptable vapor intrusion risk.
3/16/2010
ATC sampled monitoring wells MW-4, MW-7, MW-7B, MW-7C, MW-8, MW-14, MW-15A, MW-15B, MW-23, MW-
24A, MW-24B, MW-29, MW-31, MW-32, MW-37A, MW-37B, MW-38A, MW-38B, and MW-43 and collected surface
water samples Midstream, Downstream, and Upstream. PCE was detected in monitoring wells MW-7, MW-8, MW-14,
MW-15A, MW-23, MW-24B, MW-32, MW-37A, MW-38A, and MW-43 above the NC 2L Standard.
3/15-16/2010
ATC collected two sub-slab soil gas samples (SGMP-1 and SGMP-2) and two air samples (Indoor #1 and Indoor #2) at the
subject site. The samples were collected in the same locations as the December 2009 sub-slab and air sampling event. The
indoor air samples showed no exceedences of the risk levels considered acceptable by the DSCA Program.
7/28/2010 ATC sampled monitoring well MW-43. The sample contained PCE above the NC 2L Standard. Following sampling, MW-
43, injection wells MW-B1 through MW-B4, and soil vapor extraction wells SVE-1 through SVE-4 were abandoned.
9/22/2010 ATC sampled monitoring wells MW-7, MW-7B, MW-8, MW-23, MW-29, MW-31, and MW-32. PCE was detected in
monitoring wells MW-7, MW-8, MW-23, and MW-32 above the NC 2L Standard.
9/21-22/2010
ATC collected three sub-slab soil gas samples (SGMP-3 through SGMP-5) in off-site commercial structures, two
crawlspace air samples (CS#1 and CS#2) from off-site commercial structures, and one crawlspace air sample (CS#3) from
an off-site residential structure. Sub-slab soil gas sample SGMP-3 (collected in Express Alterations) indicated a
concentration of PCE exceeding the IHSB Industrial/Commercial VISLs.
10/29/2010
ATC collected two indoor air samples (R1 and R2) to further evaluate the risk of vapor intrusion into the Express
Alterations space. Laboratory results did not indicate exceedences of the risk levels considered acceptable by the DSCA
Program.
1/14/2011 ATC submitted a Remediation System Operation & Maintenance and Post-Remediation Sampling Report documenting the
SVE system operation and December 2009 and March 2010 vapor intrusion sampling.
Page 3 of 4
Table 1: Site Chronology
DSCA ID No.: DC670003
Chronology of Events
Instructions: Brief description of all significant events that have occurred since a problem was
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
Date
ADT 1
2/11/2011
ATC submitted an Off-Site Vapor Intrusion Report documenting September 2010 and October 2010 off-site air and sub-
slab soil gas sampling. The report concluded that there was no significant risk of vapor intrusion for off-site structures in
the area of the plume.
3/11/2011 ATC submitted a Groundwater Monitoring Report documenting the January 2009, April 2009, August 2009, October 2009,
December 2009, March 2010, July 2010, and September 2010 groundwater sampling events.
3/31/2011 ATC submitted an Injection Evaluation Report to the UIC Program discussing the results of the injection event that took
place in September 2009.
10/25-26/2012 ATC sampled monitoring wells MW-4, MW-7A, MW-8, MW-23, MW-29, MW-36A, and MW-37A. PCE was detected in
monitoring wells MW-4, MW-7A, MW-8, MW-23, MW-29, MW-36A, and MW-37A above the NC 2L Standard.
7/26/2013 ATC submitted a Groundwater Monitoring Report documenting the October 2012 groundwater sampling event.
1/10/2014 ATC collected four indoor air samples (Indoor Air #1, Indoor Air #2, R1 and R2) from the former drycleaning tenant space
and the Express Alterations tenant space on January 10, 2014.
7/25/2014 ATC collected four indoor air samples (Indoor Air #1, Indoor Air #2, R1 and R2) from the former drycleaning tenant space
and the Express Alterations tenant space on July 25, 2014.
10/7/2014 ATC submitted an Indoor Air Sampling Report documenting indoor air sampling conducted on January 10, 2014 and July
25, 2014.
11/11/2014 ATC collected sub-slab samples (SGMP VP1, SGMP VP2, and SGMP VP3) on November 11, 2014 in the Express
Alterations tenant space.
1/30/2015 ATC submitted a Sub-Slab Gas Sampling Report documenting the collection of sub-slab gas samples on January 30, 2015.
5/26-27/2015 ATC collected groundwater samples from monitoring wells MW-4, MW-7, MW-8, MW-29, MW-35A, MW-36A, MW-
37A and MW-38A.
8/4/2015 ATC submitted a Groundwater Monitoring Report documenting the May 2015 sampling event.
12/26-27/2017 ATC collected groundwater samples from monitoring wells MW-8, MW-14, MW-29, MW-36A, MW-38A, MW-39, MW-
41, and MW-44.
1/18/2018 ATC collected soil gas samples from SGMP-VP1, SGMP-5 (5'), SGMP-5 (10'), SGMP-6 (5'), and SGMP-6 (10').
Page 4 of 4
Table 3: Analytical Data for Sub-slab GasDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)4 4 G 12/15/09 <5.0 <5.0 <5.0 NA NA 60 16 <5.0 <5.0 <5.0 8.04 4 G 3/16/10 <5.0 <5.0 6.5 NA <10 100 24 7.0 <5.0 <5.0 344 4 G 12/15/09 <5.0 <5.0 <5.0 NA NA 440 26 <5.0 <5.0 <5.0 104 4 G 3/16/10 <5.0 <5.0 <5.0 NA <10 90 9.6 <5.0 <5.0 <5.0 7.1SGMP-3 4 4 G 9/21/10 <10 <10 <10 NA <20 2,000 22 <10 <10 <10 <104 4 G 11/11/14 <16 <20 <22 NA <2727,000<19 <40 <27 <13 <444 4 G 1/19/18 NA <8.0 NA NA NA8,500NA <16 <11 <5.2 NASGMP VP2 4 4 G 11/11/14 <16 <20 <22 NA <2710,000<19 <40 <27 <13 <44SGMP VP3 4 4 G 11/11/14 <16 <20 <22 NA <2716,00053 <40 56 <13 <44SGMP-4 5 5 G 9/21/10 19 <5 6 NA <10 29 39 <5 <5 <5 11SGMP-5 5 5 G 9/21/10 <5 <5 <5 NA <10 14 14 <5 <5 <5 6.31,600 NE 4,900 47,000 260 3,500 440,000 NE 180 2,800 8,800Slab Thickness[inches]SGMP VP1Sampling Duration 1Sub-slab soil gas samples collected from 630 W. Corbett Avenue.Sub-slab soil gas samples collected from 623 E. Sabiston Drive.1 Indicate "G" for grab sample or for longer samples indicate the number of hours followed by "h".Sample IDSampling Date (mm/dd/yy)DWM Non-Residential Soil Gas Screening LevelsSub-slab soil gas samples collected from former drycleaner building.SGMP-1SGMP-2Depth[inches bgs][µg/m3]ADT 3Page 1 of 1
Table 4: Analytical Data for Soil GasDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)Acetonen-HexaneCyclohexane1,2,4-Trimethylbenzene1,3,5-TrimethylbenzenePropeneSGMP-1 5 G 1/30/09 5.1 <5 5.4 <5 NA <5 54 NA <5 <5 11.4 <20 23 15 36 88 <105 G 1/30/09 <5 <5 <5 <5 NA58025 NA17<5 15 30 <5 <10 13 7.3 <1010 G 1/30/09 6 <5 <5 <5 NA38033 NA <5 <5 18 51 <5 <10 11 5.3 76SGMP-4 5 G 1/30/09 <5 <5 <5 <5 NA 35 120 NA <5 <5 13 33 <5 <10 13 17 <10G 1/30/09 <50 <50 <50 <50 NA8,700<50 NA <50 <50 <50 <200 <50 <100 <50 <50 <100G 1/19/18 NA 250 NA NA NA4,500NA <8.01,900<2.6 NA NA NA NA NA NA NAG 1/30/09 <50 <50 <50 <50 NA11,000<50 NA390<50 <50 <200 <50 <100 <50 <50 <100G 1/19/18 NA 21 NA NA NA 23 NA <8.014<2.6 NA NA NA NA NA NA NATrip Blank NA G 1/30/09 <5 <5 <5 <5 NA <5 <5 NA <5 <5 <5 <20 <5 <10 <5 <5 <10Equip Blank NA G 1/30/09 <5 <5 <5 <5 NA <5 <5 NA <5 <5 <5 <20 <5 <10 <5 <5 <10120 NE 370 3,600 21 280 35,000 NE 14 56 700 220,000 4,900 42,000 420 420 NEG 1/30/09 <10 <10 <10 <10 NA 2,100 74 NA 110 <10 18 <48 <10 <20 29 21 <20G 1/19/18 NA 18 NA NA NA 2,200 NA <8.0510<2.6 NA NA NA NA NA NA NAG 1/30/09 <10 <10 <10 <10 NA 3,200 49 NA 150 <10 15 52 <10 <20 19 13 <20G 1/19/18 NA 30 NA NA NA 2,500 NA <8.0600<2.6 NA NA NA NA NA NA NA1,600 NE 4,900 47,000 260 3,500 440,000 NE 180 2,800 8,800 2,700,000 61,000 530,000 5,300 5,300 NESample Duration 1Sample IDSampling Date (mm/dd/yy)Depth[feet bgs][µg/m3]SGMP-3DWM Non-Residential Soil Gas Screening Levels5SGMP-610SGMP-5510DWM Residential Soil Gas Screening LevelsADT 4Page 1 of 1
Table 6: Monitoring Well Construction DataDSCA ID No.: DC670003Well IDDate Installed(mm/dd/yy)Number of SamplesWell Depth[feet]Well Diameter [inch]Screen Interval[feet]Status(Active/Inactive)MW-4 2/24/94 8 24 2 14 to 24 ActiveMW-7 11/2/94 10 20 2 10 to 20 ActiveMW-7B 5/21/08 8 47 1 42 to 47 ActiveMW-7C 5/21/08 7 70 1 65 to 70 ActiveMW-8 11/3/94 11 23.5 2 13.5 to 23.5 ActiveMW-11 11/4/94 3 23 2 13 to 23 ActiveMW-14 1/9/95 6 23 2 13 to 23 ActiveMW-15A 1/9/95 2 22 2 12 to 22 ActiveMW-15B 5/20/08 7 46 1 41 to 46 ActiveMW-15C 5/20/08 4 70 1 65 to 70 ActiveMW-17 1/9/95 3 22 2 12 to 22 ActiveMW-23 1/11/95 8 19 2 9 to 19 ActiveMW-24A 1/11/95 6 21 2 11 to 21 ActiveMW-24B 5/17/08 6 37 1 32 to 37 ActiveMW-24C 5/17/08 4 70 1 65 to 70 ActiveMW-25 6/26/95 6 20 2 10 to 20 InactiveMW-26 6/26/95 4 20 2 10 to 20 InactiveMW-27 6/26/95 8 20 2 10 to 20 InactiveMW-29 6/26/95 11 20 2 15 to 20 ActiveMW-30 6/26/95 1 20 2 8 to 20 ActiveMW-31 5/21/08 8 20 2 5 to 20 ActiveMW-32 5/18/08 8 20 2 10 to 20 ActiveMW-33 5/17/08 4 20 2 5 to 20 ActiveMW-34 5/13/08 4 25 2 5 to 25 ActiveMW-35A 5/15/08 5 15 1 5 to 15 ActiveMW-35B 5/15/08 4 30 1 25 to 30 ActiveMW-35C 5/15/08 4 70 1 65 to 70 ActiveMW-36A 5/14/08 7 15 1 5 to 15 ActiveMW-36B 5/14/08 4 50 1 45 to 50 ActiveMW-36C 5/14/08 4 70 1 65 to 70 ActiveMW-37A 5/12/08 8 20 1 5 to 20 ActiveMW-37B 5/12/08 6 50 1 45 to 50 ActiveMW-37C 5/12/08 4 69 1 64 to 69 ActiveADT 6Page 1 of 2
Table 6: Monitoring Well Construction DataDSCA ID No.: DC670003Well IDDate Installed(mm/dd/yy)Number of SamplesWell Depth[feet]Well Diameter [inch]Screen Interval[feet]Status(Active/Inactive)ADT 6MW-38A 5/14/08 8 20 1 5 to 20 ActiveMW-38B 5/14/08 6 50 1 45 to 50 ActiveMW-38C 5/14/08 4 70 1 65 to 70 ActiveMW-39 5/14/08 5 25 1 5 to 25 ActiveMW-40 5/16/08 4 17 2 3 to 17 ActiveMW-41 5/16/08 5 20 2 5 to 20 ActiveMW-42 5/21/08 4 6.5 2 1.5 to 6.5 ActiveMW-43 1/19/09 7 25 1 5 to 25 InactiveMW-44 8/13/08 5 25 2 10 to 25 ActiveMW-45 8/13/08 4 25 2 10 to 25 ActivePage 2 of 2
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
MW-4 1/22/2008 29.57 17.62 11.95 NA NA NA
8/19/2009 17.18 12.39 NA NA NA
10/16/2009 15.94 13.63 NA NA NA
12/15/2009 13.21 16.36 NA NA NA
3/17/2010 12.30 17.27 NA NA NA
9/22/2010 15.90 13.67 15.85 0.05 13.71
10/25/2012 16.66 12.91 NA NA NA
5/26/2015 14.42 15.15 NA NA NA
12/28/2017 16.57 13.00 NA NA NA
MW-7 1/28/2009 30.18 16.11 14.07 NA NA NA
4/14/2009 16.03 14.15 NA NA NA
8/19/2009 17.26 12.92 NA NA NA
10/15/2009 15.98 14.2 NA NA NA
12/15/2009 13.23 16.95 NA NA NA
3/17/2010 12.25 17.93 NA NA NA
9/22/2010 15.95 14.23 NA NA NA
10/25/2012 16.77 13.41 NA NA NA
5/26/2015 14.43 15.75 NA NA NA
12/28/2017 16.68 13.50 NA NA NA
MW-7B 1/28/2009 30.31 17.98 12.33 NA NA NA
4/14/2009 17.91 12.40 NA NA NA
8/19/2009 18.96 11.35 NA NA NA
10/15/2009 17.87 12.44 NA NA NA
12/15/2009 15.41 14.90 NA NA NA
3/17/2010 24.57 5.74 NA NA NA
9/22/2010 26.08 4.23 NA NA NA
10/25/2012 NM NM NA NA NA
12/28/2017 25.20 5.11 NA NA NA
MW-7C 1/30/2009 30.41 25.78 4.63 NA NA NA
4/14/2009 25.44 4.97 NA NA NA
8/19/2009 26.82 3.59 NA NA NA
10/15/2009 25.10 5.31 NA NA NA
12/15/2009 24.60 5.81 NA NA NA
3/15/2010 14.82 15.59 NA NA NA
10/25/2012 25.98 4.43 NA NA NA
12/28/2017 25.87 4.54 NA NA NA
MW-8 1/29/2009 29.55 15.98 13.57 NA NA NA
4/15/2009 15.81 13.74 NA NA NA
8/19/2009 17.10 12.45 NA NA NA
10/15/2009 15.89 13.66 NA NA NA
12/15/2009 13.12 16.43 NA NA NA
3/17/2010 12.31 17.24 NA NA NA
9/22/2010 15.75 13.80 NA NA NA
10/25/2012 16.57 12.98 NA NA NA
5/26/2015 14.28 15.27 NA NA NA
12/26/2017 16.48 13.07 NA NA NA
MW-11 1/22/2008 29.20 16.91 12.29 NA NA NA
8/19/2009 16.85 12.35 NA NA NA
10/14/2009 15.27 13.93 NA NA NA
10/25/2012 Dry NA NA NA NA
12/28/2017 Dry NA NA NA NA
ADT 7
Page 1 of 6
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
ADT 7
MW-14 4/15/2009 29.38 15.91 13.47 NA NA NA
8/19/2009 17.30 12.08 NA NA NA
10/16/2009 16.00 13.38 NA NA NA
12/15/2009 13.13 16.25 NA NA NA
3/18/2010 12.32 17.06 NA NA NA
9/22/2010 16.05 13.33 15.57 0.48 13.69
10/25/2012 16.95 12.43 16.42 0.53 12.87
12/26/2017 16.87 12.51 NA NA NA
MW-15A 1/22/2008 26.58 14.91 11.67 NA NA NA
1/31/2009 Dry NA NA NA NA
8/19/2009 Dry NA NA NA NA
12/16/2009 10.24 16.34 NA NA NA
3/15/2010 10.24 16.34 NA NA NA
9/23/2010 13.71 12.87 13.47 0.24 13.05
10/25/2012 Dry NA NA NA NA
12/28/2017 Dry NA NA NA NA
MW-15B 1/31/2009 26.67 16.11 10.56 NA NA NA
4/15/2009 15.92 10.75 NA NA NA
8/19/2009 16.81 9.86 NA NA NA
10/15/2009 15.88 10.79 NA NA NA
12/16/2009 14.21 12.46 NA NA NA
3/15/2010 13.35 13.32 NA NA NA
10/25/2012 16.73 9.94 NA NA NA
12/28/2017 16.62 10.05 NA NA NA
MW-15C 1/31/2009 26.68 22.21 4.47 NA NA NA
4/15/2009 21.77 4.91 NA NA NA
12/16/2009 20.86 5.82 NA NA NA
10/25/2012 22.22 4.46 NA NA NA
12/28/2017 22.12 4.56 NA NA NA
MW-17 1/22/2008 23.71 12.14 11.57 NA NA NA
8/18/2009 11.85 11.86 NA NA NA
10/14/2009 10.91 12.80 NA NA NA
10/25/2012 11.07 12.64 NA NA NA
12/28/2017 10.98 12.73 NA NA NA
MW-23 4/15/2009 18.19 6.86 11.33 NA NA NA
8/20/2009 7.52 10.67 NA NA NA
10/15/2009 7.00 11.19 NA NA NA
12/16/2009 5.09 13.10 NA NA NA
3/17/2010 4.61 13.58 NA NA NA
9/23/2010 6.86 11.33 NA NA NA
10/25/2012 8.11 10.08 NA NA NA
12/28/2017 8.02 10.17 NA NA NA
MW-24A 1/28/2009 20.62 10.40 10.22 NA NA NA
4/16/2009 9.85 10.77 NA NA NA
8/20/2009 10.74 9.88 NA NA NA
12/16/2009 7.84 12.78 NA NA NA
3/16/2010 7.06 13.54 NA NA NA
10/25/2012 8.68 11.94 NA NA NA
12/28/2017 8.59 12.03 NA NA NA
Page 2 of 6
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
ADT 7
MW-24B 1/29/2009 22.72 12.92 9.8 NA NA NA
4/16/2009 12.85 9.87 NA NA NA
12/16/2009 11.14 11.58 NA NA NA
3/16/2010 10.65 12.07 NA NA NA
10/25/2012 11.97 10.75 NA NA NA
12/28/2017 11.88 10.84 NA NA NA
MW-24C 1/29/2009 22.75 18.11 4.64 NA NA NA
4/16/2009 17.92 4.83 NA NA NA
8/20/2009 19.50 3.25 NA NA NA
12/16/2009 16.98 5.77 NA NA NA
10/25/2012 17.75 5.00 NA NA NA
12/28/2017 17.65 5.10 NA NA NA
MW-29 1/31/2009 NM 12.25 NM NA NA NA
4/16/2009 12.91 NM NA NA NA
8/20/2009 13.18 NM NA NA NA
10/14/2009 12.30 NM NA NA NA
12/16/2009 11.58 NM NA NA NA
3/16/2010 9.20 NM NA NA NA
9/23/2010 12.28 NM NA NA NA
10/25/2012 13.41 NM NA NA NA
5/26/2015 11.01 NM NA NA NA
12/26/2017 13.31 NM NA NA NA
MW-30 1/22/2008 NM 15.02 NM NA NA NA
10/25/2012 13.87 NM NA NA NA
12/28/2017 13.79 NM NA NA NA
MW-31 1/28/2009 30.92 15.62 15.3 NA NA NA
4/15/2009 15.56 15.36 NA NA NA
8/19/2009 16.95 13.97 NA NA NA
10/14/2009 15.61 15.31 NA NA NA
12/15/2009 12.28 18.64 NA NA NA
3/15/2010 11.09 19.83 NA NA NA
9/22/2010 15.68 15.24 NA NA NA
10/25/2012 16.49 14.43 NA NA NA
12/28/2017 16.38 14.54 NA NA NA
MW-32 1/31/2009 29.47 16.65 12.82 NA NA NA
4/16/2009 16.61 12.86 NA NA NA
8/20/2009 17.77 11.70 NA NA NA
10/14/2009 16.68 12.79 NA NA NA
12/16/2009 13.94 15.53 NA NA NA
3/17/2010 13.08 16.39 NA NA NA
9/23/2010 16.56 12.91 NA NA NA
10/25/2012 17.77 11.70 NA NA NA
12/28/2017 17.68 11.79 NA NA NA
MW-33 1/31/2009 27.43 15.11 12.32 NA NA NA
4/20/2009 15.03 12.40 NA NA NA
8/21/2009 16.14 11.29 NA NA NA
12/17/2009 12.55 14.88 NA NA NA
10/25/2012 13.15 14.28 NA NA NA
Page 3 of 6
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
ADT 7
MW-34 1/27/2009 15.47 7.21 8.26 NA NA NA
4/15/2009 7.02 8.45 NA NA NA
8/21/2009 7.55 7.92 NA NA NA
12/17/2009 5.91 9.56 NA NA NA
10/25/2012 6.64 8.83 NA NA NA
12/28/2017 6.62 8.85 NA NA NA
MW-35A 1/27/2009 11.98 7.45 4.53 NA NA NA
4/13/2009 4.09 7.89 NA NA NA
8/20/2009 4.40 7.58 NA NA NA
12/17/2009 2.88 9.10 NA NA NA
10/25/2012 6.77 5.21 NA NA NA
5/26/2015 3.39 8.59 NA NA NA
12/28/2017 6.68 5.30 NA NA NA
MW-35B 1/27/2009 12.00 4.18 7.82 NA NA NA
4/13/2009 3.85 8.15 NA NA NA
8/20/2009 4.25 7.75 NA NA NA
12/17/2009 2.44 9.56 NA NA NA
10/25/2012 3.55 8.45 NA NA NA
12/28/2017 3.44 8.56 NA NA NA
MW-35C 1/27/2009 11.95 3.98 7.97 NA NA NA
4/13/2009 7.02 4.93 NA NA NA
8/20/2009 5.24 6.71 NA NA NA
12/17/2009 6.02 5.93 NA NA NA
10/25/2012 3.4 8.55 NA NA NA
12/28/2017 3.29 8.66 NA NA NA
MW-36A 1/27/2009 13.01 5.10 7.91 NA NA NA
4/15/2009 4.92 8.09 NA NA NA
8/20/2009 5.31 7.70 NA NA NA
12/18/2009 3.90 9.11 NA NA NA
10/25/2012 5.45 7.56 NA NA NA
5/26/2015 4.52 8.49 NA NA NA
12/27/2017 5.35 7.66 NA NA NA
MW-36B 1/27/2009 12.99 8.40 4.59 NA NA NA
4/15/2009 7.80 5.19 NA NA NA
8/20/2009 9.04 3.95 NA NA NA
12/18/2009 6.77 6.22 NA NA NA
10/25/2012 7.81 5.81 NA NA NA
12/28/2017 7.70 5.29 NA NA NA
MW-36C 1/27/2009 12.97 8.27 4.70 NA NA NA
4/15/2009 8.22 4.75 NA NA NA
8/20/2009 9.14 3.83 NA NA NA
12/18/2009 6.91 6.06 NA NA NA
10/25/2012 0.00 12.97 NA NA NA
12/28/2017 7.85 5.12 NA NA NA
Page 4 of 6
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
ADT 7
MW-37A 1/29/2009 4.76 8.00 -3.24 NA NA NA
4/17/2009 0.00 4.76 NA NA NA
8/20/2009 0.00 4.76 NA NA NA
12/16/2009 0.00 4.76 NA NA NA
3/16/2010 0.00 4.76 NA NA NA
10/25/2012 0.00 4.76 NA NA NA
5/27/2015 0.00 4.76 NA NA NA
12/28/2017 0.00 4.76 NA NA NA
MW-37B 1/30/2009 4.79 0.00 4.79 NA NA NA
4/17/2009 0.00 4.79 NA NA NA
8/20/2009 0.00 4.79 NA NA NA
12/16/2009 0.00 4.79 NA NA NA
3/16/2010 0.00 4.79 NA NA NA
10/25/2012 0.00 4.79 NA NA NA
12/28/2017 0.00 4.79 NA NA NA
MW-37C 1/30/2009 4.74 0.00 4.74 NA NA NA
4/17/2009 0.00 4.74 NA NA NA
8/20/2009 0.00 4.74 NA NA NA
12/16/2009 0.00 4.74 NA NA NA
10/25/2012 0.00 4.74 NA NA NA
12/28/2017 0.00 4.74 NA NA NA
MW-38A 1/29/2009 14.84 0.00 14.84 NA NA NA
4/16/2009 8.11 6.73 NA NA NA
8/20/2009 8.45 6.39 NA NA NA
12/16/2009 7.12 7.72 NA NA NA
3/16/2010 7.27 7.57 NA NA NA
10/25/2012 7.84 7.00 NA NA NA
5/27/2015 8.03 6.81 NA NA NA
12/27/2017 7.73 7.11 NA NA NA
MW-38B 1/30/2009 14.86 9.51 5.35 NA NA NA
4/17/2009 9.21 5.65 NA NA NA
8/20/2009 10.38 4.48 NA NA NA
12/16/2009 8.13 6.73 NA NA NA
3/16/2010 8.39 6.47 NA NA NA
10/25/2012 8.96 5.90 NA NA NA
12/28/2017 8.87 5.99 NA NA NA
MW-38C 1/30/2009 14.83 9.38 5.45 NA NA NA
4/17/2009 9.40 5.43 NA NA NA
8/20/2009 10.58 4.25 NA NA NA
12/16/2009 8.42 6.41 NA NA NA
10/25/2012 9.03 5.80 NA NA NA
12/28/2017 8.92 5.91 NA NA NA
MW-39 1/30/2009 13.15 4.92 8.23 NA NA NA
4/20/2009 4.92 8.23 NA NA NA
8/21/2009 5.42 7.73 NA NA NA
12/17/2009 3.60 9.55 NA NA NA
10/25/2012 4.32 8.83 NA NA NA
12/27/2017 4.22 8.93 NA NA NA
Page 5 of 6
Table 7: Groundwater Elevation Data
DSCA ID No.: DC670003
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
[feet]
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
ADT 7
MW-40 1/30/2009 13.63 3.78 9.84 NA NA NA
4/20/2009 3.38 10.25 NA NA NA
8/21/2009 4.48 9.15 NA NA NA
12/17/2009 2.60 11.03 NA NA NA
10/25/2012 3.33 10.30 NA NA NA
12/28/2017 3.21 10.42 NA NA NA
MW-41 1/30/2009 24.73 11.91 12.82 NA NA NA
4/20/2009 11.85 12.88 NA NA NA
8/21/2009 12.90 11.83 NA NA NA
12/17/2009 9.58 15.15 NA NA NA
10/25/2012 NM NM NA NA NA
12/26/2017 10.21 14.52 NA NA NA
MW-42 1/30/2009 2.07 0.5 1.57 NA NA NA
4/20/2009 0.00 2.07 NA NA NA
8/20/2009 1.77 0.3 NA NA NA
12/17/2009 1.17 0.90 NA NA NA
10/25/2012 NM NM NA NA NA
MW-43 1/31/2009 NM 16.46 NM NA NA NA
4/14/2009 16.43 NM NA NA NA
8/19/2009 17.61 NM NA NA NA
10/14/2009 16.45 NM NA NA NA
12/15/2009 13.59 NM NA NA NA
3/17/2010 12.50 NM NA NA NA
7/28/2010 16.55 NM NA NA NA
10/25/2012 NM NM NA NA NA
12/28/2017 15.78 NM NA NA NA
MW-44 1/30/2009 NM 11.62 NM NA NA NA
4/20/2009 11.86 NM NA NA NA
8/21/2009 13.87 NM NA NA NA
12/17/2009 8.05 NM NA NA NA
10/25/2012 11.03 NM NA NA NA
12/27/2017 10.94 NM NA NA NA
MW-45 1/31/2009 NM 15.79 NM NA NA NA
4/20/2009 15.72 NM NA NA NA
8/21/2009 17.22 NM NA NA NA
12/17/2009 12.09 NM NA NA NA
10/25/2012 12.69 NM NA NA NA
12/28/2017 12.60 NM NA NA NA
* = Groundwater elevation is below sea level
Page 6 of 6
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherSB01 12/18/07 <0.0005 <0.005 <0.005 <0.005 <0.0050.0024J<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.010 0.00079J <0.010 <0.005 <0.01 <0.01 <0.005SB02 12/18/070.28<0.005 0.01 0.00930.0076<0.0007 0.0025J <0.005 <0.005 <0.0005 0.0113 <0.005 <0.005 0.05J <0.005 0.0045J <0.005 <0.01 <0.01 <0.005SB08 12/19/07 <0.0005 <0.005 <0.005 <0.005 0.00027J0.0016J<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.010 <0.005 <0.010 <0.005 <0.01 <0.01 <0.005SB10 12/19/07 <0.0005 <0.005 <0.005 <0.005 <0.0050.0013J<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.010 0.00052J <0.010 <0.005 <0.01 <0.01 <0.005SB11 12/19/07 <0.0005 <0.005 <0.005 <0.005 <0.0050.00077J<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.010 <0.005 <0.010 <0.005 <0.01 <0.01 <0.0051/23/08 <0.020 <0.020 <0.020 NA NA0.5<0.020 <0.020 <0.020 <0.020 0.021 NA NA NA NA NA NA NA NA NA8/19/09 <0.0005 0.0017J 0.0013J <0.0050.04 0.41<0.005 <0.005 0.0027J <0.0005 0.0154 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0058/19/09 <0.001 0.0014 0.0012 <0.0010.045 0.36<0.001 <0.001 0.0019 <0.001 0.0153 <0.001 <0.001 0.0052 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00110/16/09 0.00016J 0.0089J 0.0001J <0.0010.023 1.10.00048J <0.0010.025 0.00017J0.0021 0.0022 <0.001 0.0092 <0.001 <0.005 <0.001 0.00041J <0.001 <0.00112/15/09 <0.053<0.05 <0.050.013J 0.16<0.05 0.062 <0.05 <0.05 0.008J <0.05 <0.05 <0.25 <0.05 <0.25 <0.05 <0.05 <0.05 <0.053/17/10 <0.00250.91<0.025 <0.0250.022J<0.0035 <0.025 0.003J <0.014 <0.0025 0.0066J <0.025 <0.025 <0.25 <0.025 <0.05 <0.025 <0.05 <0.05 <0.02510/25/12 <0.00253.50.0079 <0.0050.098 0.03<0.005 0.003J0.022 0.00330.065 0.0032J <0.005 0.015J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/26/15 <0.0040 0.06 0.0020 J <0.00400.032 0.038<0.0040 <0.00400.009<0.0080 0.0028 J <0.0040 <0.0080 <0.20 0.017 <0.080 <0.0080 <0.040 <0.0080 <0.00201/23/08 <0.1 <0.1 <0.1 NA NA5.5<0.1 <0.1 <0.1 <0.1 <0.2 NA NA NA NA NA NA NA NA NA1/28/09 <0.02 0.027 <0.02 <0.02 <0.028.6<0.02 <0.020.032<0.02 <0.02 <0.02 <0.02 <0.1 <0.02 <0.10.0082J<0.02 <0.02 <0.024/14/09 <0.001 0.022 <0.001 <0.001 <0.0015.4<0.001 <0.0010.027<0.001 <0.001 <0.001 0.00097J <0.005 <0.001 <0.005 0.00028J <0.001 <0.001 <0.0018/19/09 <0.0005 0.0044J <0.005 <0.005 0.0017J0.37<0.005 <0.0050.0038<0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/15/09 <0.001 0.0032 <0.001 <0.001 <0.0010.26<0.001 <0.001 0.0025 <0.001 <0.001 <0.001 0.00023J 0.011 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.00058J <0.001 <0.001 <0.0010.034<0.001 <0.001 0.0006J <0.001 <0.001 <0.001 <0.001 0.024 0.0049 <0.005 <0.001 <0.001 <0.001 <0.0013/17/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.0087<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/22/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.16<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/25/12 <0.0005 0.0062J <0.005 <0.005 <0.0051.3<0.005 <0.0050.008 0.00037J<0.005 0.0008J <0.005 0.0038J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/26/15 <0.10 <0.10 <0.10 <0.10 <0.204.7<0.10 <0.10 <0.10 <0.20 <0.30 <0.10 <0.20 <5.0 <0.40 <2.0 <0.20 <1.0 <0.20 <0.050MW-4MW-7Groundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 8Page 1 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 85/23/08 <0.005 <0.005 <0.005 <0.005 <0.0050.22<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 0.0017J <0.01 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/28/09 <0.001 0.0009J <0.001 <0.001 <0.0010.021<0.001 <0.001 0.00019J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00036J <0.001 <0.001 <0.0014/14/09 <0.001 0.00055J <0.001 <0.001 <0.0010.00160.00017J <0.001 0.00012J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/19/09 <0.005 0.0005J <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/15/09 <0.001 0.0003J <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 0.000094J <0.001 <0.001 <0.001 <0.001 0.013 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.0004J <0.001 <0.001 <0.001 0.00041J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/17/10 <0.005 <0.005 <0.005 <0.005 0.0012J <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/22/10 <0.005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.0021J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/23/08 <0.005 <0.005 <0.005 <0.005 0.00027J <0.0007 0.00025J <0.005 <0.005 <0.0005 0.00036J <0.005 0.004J <0.01 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/30/09 <0.001 0.0002J 0.00032J <0.001 0.0006J 0.000092J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00046J <0.001 <0.001 <0.0014/14/09 <0.001 <0.001 <0.001 <0.001 <0.0010.0010.00015J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00025J <0.001 <0.001 <0.0018/19/09 <0.005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/15/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.00022J <0.001 <0.001 <0.001 0.00028J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/15/10 <0.005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.014J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/23/08 <0.1 <0.1 <0.1 NA NA2.4<0.1 <0.1 <0.1 <0.1 <0.2 NA NA NA NA NA NA NA NA NA1/29/09 <0.020.21<0.02 <0.02 <0.023.5<0.02 <0.020.32<0.02 <0.02 <0.020.07<0.1 <0.02 <0.10.0085J<0.02 <0.02 <0.024/15/09 <0.01 0.0097J <0.01 <0.010.0067 4.1<0.01 <0.010.016<0.01 <0.01 <0.01 0.0025J <0.05 <0.01 <0.05 <0.01 <0.01 <0.01 <0.018/19/09 <0.0005 0.01 <0.005 <0.005 <0.0052.7<0.005 <0.0050.013<0.0005 <0.005 <0.005 0.0009J <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/15/09 <0.001 0.0083 <0.001 <0.001 <0.0010.74<0.001 <0.0010.0051<0.001 <0.001 <0.001 0.00036J 0.018 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.035 <0.001 <0.001 <0.0013.3<0.001 0.00039J0.04<0.001 <0.001 <0.001 0.00041J <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/17/10 <0.0005 0.0017J <0.005 <0.005 <0.0050.039<0.005 <0.005 0.00059J <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/22/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.022<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/25/12 <0.0005 0.036 0.00024J <0.005 <0.0051.2<0.005 <0.0050.031<0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/26/15 <0.10 <0.10 <0.10 <0.10 <0.206.1<0.10 <0.10 <0.10 <0.20 <0.30 <0.10 <0.20 <5.0 <0.40 <2.0 <0.20 <1.0 <0.20 <0.05012/26/17 <0.040 0.04 <0.040 <0.040 <0.0801.6<0.040 <0.0400.041<0.080 <0.080 <0.040 <0.080 <2.0 <0.16 <0.80 <0.080 <0.40 <0.080 <0.020MW-7CMW-8MW-7BPage 2 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 81/23/08 <0.001 <0.001 <0.001 NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NA8/19/09 <0.0005 <0.005 <0.005 <0.005 0.0031J <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/14/09 <0.001 <0.001 <0.001 <0.001 0.00039J 0.00029J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0011/23/08 <0.020 <0.020 <0.020 NA NA0.76<0.020 <0.020 <0.020 <0.020 <0.040 NA NA NA NA NA NA NA NA NA4/15/09 <0.001 0.00066J 0.0025 <0.0010.065 0.420.00016J <0.0010.0059<0.001 0.061 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00110/16/09 0.00033J 0.014 0.0013 <0.0010.045 0.230.00063J <0.0010.0054<0.001 0.0201 0.00091J <0.001 0.033 <0.001 <0.005 <0.001 0.00035J <0.001 <0.00112/15/09 <0.0012.2<0.001 <0.0010.025 0.990.00017J 0.0360.17<0.001 0.00264 0.0055 <0.001 0.046 0.0056 <0.005 <0.001 0.00093J <0.001 <0.0013/18/10 <0.00053.3<0.005 <0.0050.024 0.65<0.005 <0.0050.2 0.0017<0.005 0.0044J <0.005 0.007J 0.0034J <0.01 <0.005 <0.01 <0.01 <0.00512/26/17 <0.0500.67<0.050 <0.0500.2 3<0.050 <0.0500.26<0.10 <0.10 <0.050 <0.10 <2.5 <0.20 <1.0 <0.10 <0.50 <0.10 <0.0251/24/080.082<0.0500.81NA NA0.17 3.5<0.0500.1<0.0504.4NA NA NA NA NA NA NA NA NA3/15/100.38 1.3 2.4<0.250.76 0.054 11<0.250.043J<0.02512.6<0.25 <0.25 <2.5 <0.25 <0.5 <0.25 <0.5 <0.5 <0.255/22/08 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 0.00044J <0.005 <0.005 <0.0005 0.00031J <0.005 0.00048J <0.01 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/31/09 <0.001 <0.001 0.0002J <0.001 0.00019J0.00210.00054J <0.001 <0.001 <0.001 0.00026J <0.001 <0.001 <0.005 <0.001 <0.005 0.00036J <0.001 <0.001 <0.0014/15/09 <0.001 <0.001 <0.001 <0.001 <0.0010.0019<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/19/09 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/15/09 <0.001 <0.001 <0.001 <0.001 0.00018J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.0002J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/15/10 <0.0005 <0.005 0.0014J <0.005 0.005 <0.0007 0.0011J <0.005 <0.0028 <0.0005 0.008 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/22/08 <0.0005 <0.005 0.00028J <0.005 <0.005 <0.0007 0.00039J <0.005 <0.005 <0.0005 0.00087J <0.005 0.0042J 0.0055J 0.0005J <0.01 <0.005 <0.01 <0.01 <0.0051/31/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00031J 0.0002J <0.001 <0.001 <0.001 <0.001 <0.001 0.00012J <0.005 0.00015J <0.005 0.00033J <0.001 <0.001 <0.0014/15/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00099<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00026J <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00015J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0011/23/08 <0.002 0.0031 0.074 NA NA0.00260.0096 <0.0020.0083<0.002 0.226 NA NA NA NA NA NA NA NA NA8/18/09 0.00049J 0.0031J 0.024 0.0027J0.017<0.0007 <0.005 <0.005 0.0017J0.00360.01 <0.005 <0.005 <0.05 <0.005 <0.01 0.002J <0.01 <0.01 0.00043J10/14/09 0.00042J 0.0024 0.01 0.00035J0.0110.00027J 0.00016J <0.001 0.00093J <0.001 0.00064J <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 0.00047J <0.001 <0.001MW-15CMW-11MW-17MW-15AMW-15BMW-14Page 3 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 81/23/08 <0.001 <0.001 <0.001 NA NA0.0025<0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NA4/15/09 <0.001 <0.001 <0.001 <0.001 <0.0010.0011<0.001 <0.001 0.00018J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00067J 0.00014J <0.001 0.00013J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001<0.00110/15/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00081<0.001 <0.001 0.00023J <0.001 <0.001 <0.001 <0.001 <0.005 0.00057J <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.0010.0014<0.001 <0.001 0.0003J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00042J <0.001 <0.001 <0.0013/17/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.0013<0.005 <0.005 0.00065J <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/23/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.0011<0.005 <0.005 0.00071J <0.0005 <0.005 <0.005 <0.005 0.0023J 0.0012J <0.01 <0.005 <0.01 <0.01 <0.00510/26/12 <0.0005 <0.005 <0.005 <0.005 <0.0050.001<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 0.00072J <0.01 <0.01 <0.0051/23/08 <0.020 0.047 <0.020 NA NA0.57<0.020 <0.0200.11<0.020 <0.040 NA NA NA NA NA NA NA NA NA1/28/090.016 0.086<0.001 <0.001 <0.0010.1<0.001 <0.0010.075<0.001 <0.001 0.00017J <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0014/16/090.0012 0.091<0.001 <0.001 <0.0010.1<0.001 0.00031J0.086<0.001 0.274 0.00016J <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 0.00063J0.076<0.001 <0.001 <0.0010.130.00024J <0.0010.083<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 0.0003J <0.001 <0.00112/16/09 0.0008J0.091<0.001 <0.001 <0.0010.077<0.001 0.00240.058<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/16/10 0.000880.094<0.005 <0.005 <0.0050.059<0.005 0.00078J0.048<0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/22/08 <0.0005 <0.005 0.00042J <0.005 <0.0050.0240.00027J <0.005 0.00066J <0.0005 0.0013J <0.005 0.0057 0.0082J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/29/09 <0.001 0.00015J <0.001 <0.001 <0.0010.035<0.001 <0.001 0.0003J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00033J <0.001 <0.001 <0.0014/16/09 <0.001 0.00014J <0.001 <0.001 <0.0010.022<0.001 <0.001 0.0003J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 <0.001 <0.001 <0.001 <0.001 <0.0010.02<0.001 <0.001 0.00012J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.0010.028<0.001 <0.001 0.00019J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/16/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.026<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/22/08 <0.0005 <0.005 0.00082J <0.005 0.00036J <0.0007 0.00045J <0.005 <0.005 <0.0005 <0.005 <0.005 0.0015J <0.01 0.00042J <0.01 <0.005 <0.01 <0.01 <0.0051/29/09 <0.001 <0.001 <0.001 <0.001 0.00012J 0.00027J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 0.00011J <0.005 <0.001 <0.001 <0.001<0.0014/16/09 <0.001 <0.001 0.00039J <0.001 <0.001 0.00025J 0.0002J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00034J <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.0002J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.00019J <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001MW-24AMW-24BMW-24CMW-23Page 4 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 81/23/080.46 0.58 0.6NA NA <0.020 0.038 <0.020 <0.020 <0.0201.1NA NA NA NA NA NA NA NA NA1/31/090.19 0.160.25 <0.0050.11<0.0035 0.14 <0.005 <0.005 <0.005 0.1769 <0.005 <0.005 <0.025 0.00062J <0.025 0.0021J 0.015 <0.005 <0.0254/16/090.27 0.220.29 <0.010.096 0.00140.12 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.05 <0.01 <0.05 <0.01 <0.01 <0.01 <0.018/20/090.14 0.250.27 <0.0010.140.000098J 0.18 <0.001 <0.0010.00065J0.339 0.00055J <0.001 <0.005 <0.001 <0.005 <0.001 0.01 <0.001 0.00059J10/14/090.18 0.120.14 <0.0010.0690.00019J 0.0074 <0.001 0.00022J0.00033J0.1653 0.00028J <0.001 <0.005 <0.001 <0.005 <0.001 0.0051 <0.001 <0.00112/16/090.21 0.140.043 <0.0010.0490.00055J 0.0051 0.0054 0.0013 <0.001 0.0485 0.00028J <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 0.0005J3/16/100.4 0.460.08 <0.0050.11<0.0007 0.074 0.0027J 0.0014J0.00110.047 0.00088J <0.005 0.096 <0.0005 <0.01 <0.005 <0.01 <0.01 <0.0059/23/100.026 0.840.37 <0.0250.17<0.0035 0.066 0.0058J0.043<0.0025 0.411 <0.025 <0.025 <0.25 <0.025 <0.05 <0.025 <0.05 <0.05 <0.02510/25/120.049 0.180.045 0.00024J0.046 0.00340.0047J <0.005 0.0005J0.00050.0475 <0.005 <0.005 <0.05 <0.005 <0.005 <0.005 <0.01 <0.01 <0.0055/26/150.020 J 0.4 1.2<0.0250.17 0.010 J 1.4<0.025 <0.025 <0.0503.2<0.025 <0.050 <1.2 <0.10 <0.50 <0.050 <0.25 <0.050 <0.01212/26/170.027 0.32 0.63<0.0200.42 0.0110.026 <0.020 <0.020 <0.0400.782<0.040 <0.040 <1.0 <0.080 <0.40 <0.040 <0.20 <0.040 <0.010MW-30 1/23/08 <0.0200.12 0.6NA NA <0.0201.9<0.0200.043<0.0202.35NA NA NA NA NA NA NA NA NA5/23/08 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 0.00032J <0.005 <0.005 <0.0005 <0.005 <0.005 0.0044J 0.0054J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/28/09 <0.001 <0.001 <0.001 <0.001 <0.0010.011<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0003J <0.001 <0.001 <0.0014/15/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00073<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/19/09 <0.0005 <0.005 <0.005 <0.005 0.0019J <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.00510/14/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00025J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00026J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/15/10 <0.0005 <0.005 <0.005 <0.005 0.00061J <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/22/10 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.0021J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/22/08 <0.0005 <0.005 <0.005 <0.005 0.00026J0.0098<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 0.0021J <0.01 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0051/31/09 0.00029J 0.00014J 0.00038J <0.001 0.00016J0.017<0.001 <0.001 0.00014J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0014/16/09 <0.001 <0.001 <0.001 <0.001 <0.0010.018<0.001 <0.001 0.00013J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 <0.001 0.00014J <0.001 <0.001 <0.0010.038<0.001 <0.001 0.00032J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00110/14/09 <0.001 <0.001 <0.001 <0.001 <0.0010.017<0.001 <0.001 0.0001J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.0010.0091<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/17/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.003<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0059/23/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.0038<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.0034J <0.005 <0.01 <0.005 <0.01 <0.01 <0.005MW-32MW-31MW-29Page 5 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 85/23/08 <0.0005 <0.005 <0.005 <0.005 <0.0050.001<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 0.0011J <0.01 <0.005 <0.01 0.00055J <0.01 <0.01 <0.051/30/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00120.0002J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00052J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 0.00028J0.00092<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 0.00029J0.00095<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 0.00043J <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 0.002J <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000506/6/08 <0.0005 0.0024J 0.00022J <0.005 <0.005 0.00054J 0.00035J <0.005 0.00085J <0.0005 0.00032J <0.005 <0.005 0.021J 0.0038J <0.01 <0.005 <0.01 <0.01 <0.051/30/09 <0.001 0.018 0.00011J <0.001 0.00021J 0.0005J 0.0015J <0.001 0.00038J <0.001 <0.001 <0.001 <0.001 <0.005 0.00017J <0.005 <0.01 <0.001 <0.001 <0.0014/20/09 <0.001 0.0023 <0.001 <0.001 0.00015J 0.00063J <0.001 <0.001 0.00081J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 0.0024 <0.001 <0.001 <0.001 0.00059J <0.001 0.00011J 0.00081J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00019J <0.001 <0.001 <0.0011/31/09 <0.001 0.037 0.00021J <0.001 <0.0010.490.00016J 0.00033J0.017<0.001 <0.001 <0.001 0.00017J <0.005 <0.001 <0.005 0.00034J <0.001 <0.001 <0.0014/14/09 <0.001 0.047 <0.001 <0.001 <0.0010.55<0.001 0.000390.018<0.001 <0.001 <0.001 0.00015J <0.005 <0.001 <0.005 0.0004J <0.001 <0.001 <0.0018/19/09 <0.0005 0.0016J <0.005 <0.005 0.00061J0.027<0.005 <0.005 0.00081J <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0510/14/09 <0.001 0.013 <0.001 <0.001 <0.0010.15<0.001 <0.0010.0034<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.0013 <0.001 <0.001 <0.0010.026<0.001 <0.001 0.00029J <0.001 <0.001 <0.001 <0.001 <0.005 0.0026 <0.005 <0.001 0.00034J <0.001 <0.0013/17/10 <0.0005 0.00095J <0.005 <0.005 <0.0050.0054<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.016J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0057/28/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.00086<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.0024J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0058/14/08 <0.0005 <0.005 <0.005 <0.005 0.0012J <0.0007 <0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 0.0016J <0.01 <0.01 <0.051/30/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00024J 0.00029J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0005J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 0.00025J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 0.0002J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 <0.00050 <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000508/14/08 <0.0005 <0.005 <0.005 <0.005 0.0011J <0.0007 <0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 0.0011J <0.01 <0.01 <0.051/31/09 0.00012J <0.001 0.00019J <0.001 <0.001 0.00014J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00032J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00018J <0.001 <0.001 <0.001MW-41MW-44MW-42MW-45MW-43Page 9 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 85/21/08 <0.0005 <0.005 0.00023J 0.00056J 0.00028J <0.0007 0.00024J <0.005 <0.005 <0.0005 <0.005 <0.005 0.0013J <0.01 <0.005 <0.01 0.00047J <0.01 <0.01 <0.051/27/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00086<0.001 <0.001 0.00019J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00059J <0.001 <0.001 <0.0014/15/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00042J <0.001 <0.001 0.000096J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/18/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0015/21/08 <0.0005 <0.005 0.00038J <0.005 0.00028J <0.0007 0.00023J <0.005 <0.005 <0.0005 <0.005 <0.005 0.0013J 0.01J <0.005 <0.01 0.00058J <0.01 <0.01 <0.0051/27/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00079<0.001 <0.001 0.0002J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00037J <0.001 <0.001 <0.0014/15/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00023J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00029J <0.001 <0.001 <0.00112/18/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00063J <0.001 <0.001 <0.0015/21/080.00160.0092 <0.005 <0.005 0.00029J0.04<0.005 <0.0050.0085<0.0005 <0.005 <0.005 <0.005 <0.01 <0.005 <0.01 0.00035J <0.01 0.0021J 0.0013J1/29/09 <0.001 <0.001 <0.001 0.00081J <0.0010.012<0.001 <0.001 0.00032J <0.001 <0.001 <0.001 0.0002J <0.005 <0.001 <0.005 0.00031J <0.001 <0.001 <0.0014/17/090.00140.011 <0.001 0.00039J <0.0010.041<0.001 <0.0010.0095<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 0.00138/20/090.00130.012 <0.001 0.00036J 0.00015J0.0510.00016J <0.0010.0081<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 0.00035J <0.001 0.001312/16/090.00130.012 <0.001 0.00032J <0.0010.059<0.001 0.00012J0.011<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 0.0013/16/100.00140.011 <0.005 <0.005 <0.0050.051<0.005 <0.0050.012<0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 0.001J10/25/120.00110.0084 <0.005 <0.005 <0.0050.03<0.005 <0.0050.0088<0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 0.00062J5/27/15 <0.0010 0.00030 J <0.0010 0.00036 J <0.00200.0023<0.0010 <0.0010 <0.0010 <0.0020 <0.003 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000505/21/08 0.00033J 0.0008J 0.00076J <0.005 <0.0050.00150.0012J <0.005 <0.005 <0.0005 0.0003J <0.005 0.001J 0.0059J <0.005 <0.01 0.00035J <0.01 <0.01 <0.0051/30/09 <0.001 <0.001 0.0001J <0.001 <0.001 <0.007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00042J <0.001 <0.001 <0.0014/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00022J <0.001 <0.001 0.00013J <0.001 <0.001 <0.001 <0.001 0.0026J <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00031J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00024J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/16/10 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/21/08 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 0.00025J <0.005 <0.005 <0.0005 0.0003J <0.005 0.0029J <0.01 0.00044J <0.01 0.0005J <0.01 0.0033J <0.0051/30/09 <0.001 <0.001 <0.001 <0.001 0.00011J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0012 <0.001 <0.001 <0.0014/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00018J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00027J <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001MW-37BMW-37CMW-36BMW-36CMW-37APage 7 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 85/21/08 0.00048J <0.005 <0.005 0.0014J 0.00042J0.0093<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 0.00026J <0.01 <0.005 <0.01 <0.005 <0.01 0.0028J 0.00039J1/29/090.00130.0094 <0.001 <0.001 <0.0010.039<0.001 <0.0010.0087<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00031J <0.001 <0.001 0.00114/16/09 <0.001 <0.001 <0.001 0.00077J <0.0010.0089<0.001 <0.001 0.00033J <0.001 <0.001 <0.001 0.00015J <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 <0.001 <0.001 <0.001 0.00086J <0.0010.010.00016J <0.001 0.00026J <0.001 <0.001 <0.001 0.00017J <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 0.00016J <0.001 0.0007J <0.0010.0099<0.001 <0.001 0.00037J <0.001 <0.001 <0.001 0.00017J <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 0.00016J3/16/10 <0.0005 <0.005 <0.005 0.00085J <0.0050.009<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/27/15 <0.0010 <0.0010 <0.0010 <0.0010 <0.00200.0017<0.0010 <0.0010 <0.0010 <0.0020 <0.003 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.0005012/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 <0.00050 <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000505/21/08 <0.0005 <0.005 <0.005 <0.005 0.00035J <0.0007 0.00027J <0.005 <0.005 <0.0005 <0.005 <0.005 0.00031J <0.01 0.0006J <0.01 0.00032J <0.01 0.0025J <0.0051/30/09 0.00038J <0.001 0.0002J 0.0036 0.00021J0.00390.00076J <0.001 <0.001 <0.001 0.00021J <0.001 <0.001 <0.005 0.00011J <0.005 0.00039J <0.001 <0.001 <0.0014/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00016J <0.001 <0.001 0.00024J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0018/20/09 0.00031J 0.00021J 0.00054J <0.001 0.00035J 0.00017J 0.00027J <0.001 0.00024J <0.001 0.00065J <0.001 <0.001 0.023 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00016J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.0013/16/10 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0055/21/08 <0.0005 <0.005 0.00024J <0.005 0.00051J <0.0007 0.00037J <0.005 <0.005 <0.0005 <0.005 <0.005 0.00041J <0.01 <0.005 <0.01 0.0004J <0.01 0.0025J <0.0051/30/09 0.0002J <0.001 0.00016J 0.0018 0.00014J 0.00032J 0.00049J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00038J <0.001 <0.001 <0.0014/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00013J <0.001 <0.001 0.00011J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0003J <0.001 <0.001 <0.00112/16/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0002J <0.001 <0.001 <0.0015/20/08 <0.0005 <0.005 <0.005 0.0014J 0.0011J <0.0007 0.00021J <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.01 <0.005 <0.01 <0.005 0.00035J 0.0026J <0.0051/30/09 0.00011J <0.001 <0.001 0.00097J <0.001 0.00032J 0.0003J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00045J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0029J <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00036J <0.001 <0.001 <0.00112/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 <0.00050 <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000505/22/08 <0.0005 <0.005 <0.005 <0.005 <0.005 <0.0007 <0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.01 <0.005 <0.01 <0.005 <0.01 <0.01 <0.051/30/09 0.00011J <0.001 <0.001 <0.001 <0.001 0.00021J 0.00021J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00044J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 0.00014J <0.001 0.00068J <0.0007 <0.001 <0.001 <0.001 <0.001 0.00073J <0.001 <0.001 <0.005 <0.001 <0.005 0.00043J <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 0.0096 <0.001 <0.005 <0.001 <0.001 <0.001 <0.001MW-38AMW-39MW-38BMW-40MW-38CPage 8 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 85/23/08 <0.0005 <0.005 <0.005 <0.005 <0.0050.001<0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 0.0011J <0.01 <0.005 <0.01 0.00055J <0.01 <0.01 <0.051/30/09 <0.001 <0.001 <0.001 <0.001 <0.0010.00120.0002J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00052J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 0.00028J0.00092<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 0.00029J0.00095<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 0.00043J <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 0.002J <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000506/6/08 <0.0005 0.0024J 0.00022J <0.005 <0.005 0.00054J 0.00035J <0.005 0.00085J <0.0005 0.00032J <0.005 <0.005 0.021J 0.0038J <0.01 <0.005 <0.01 <0.01 <0.051/30/09 <0.001 0.018 0.00011J <0.001 0.00021J 0.0005J 0.0015J <0.001 0.00038J <0.001 <0.001 <0.001 <0.001 <0.005 0.00017J <0.005 <0.01 <0.001 <0.001 <0.0014/20/09 <0.001 0.0023 <0.001 <0.001 0.00015J 0.00063J <0.001 <0.001 0.00081J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 0.0024 <0.001 <0.001 <0.001 0.00059J <0.001 0.00011J 0.00081J <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00019J <0.001 <0.001 <0.0011/31/09 <0.001 0.037 0.00021J <0.001 <0.0010.490.00016J 0.00033J0.017<0.001 <0.001 <0.001 0.00017J <0.005 <0.001 <0.005 0.00034J <0.001 <0.001 <0.0014/14/09 <0.001 0.047 <0.001 <0.001 <0.0010.55<0.001 0.000390.018<0.001 <0.001 <0.001 0.00015J <0.005 <0.001 <0.005 0.0004J <0.001 <0.001 <0.0018/19/09 <0.0005 0.0016J <0.005 <0.005 0.00061J0.027<0.005 <0.005 0.00081J <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 <0.005 <0.01 <0.01 <0.0510/14/09 <0.001 0.013 <0.001 <0.001 <0.0010.15<0.001 <0.0010.0034<0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/15/09 <0.001 0.0013 <0.001 <0.001 <0.0010.026<0.001 <0.001 0.00029J <0.001 <0.001 <0.001 <0.001 <0.005 0.0026 <0.005 <0.001 0.00034J <0.001 <0.0013/17/10 <0.0005 0.00095J <0.005 <0.005 <0.0050.0054<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.016J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0057/28/10 <0.0005 <0.005 <0.005 <0.005 <0.0050.00086<0.005 <0.005 <0.0028 <0.0005 <0.005 <0.005 <0.005 0.0024J <0.005 <0.01 <0.005 <0.01 <0.01 <0.0058/14/08 <0.0005 <0.005 <0.005 <0.005 0.0012J <0.0007 <0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 0.0016J <0.01 <0.01 <0.051/30/09 <0.001 <0.001 <0.001 <0.001 <0.001 0.00024J 0.00029J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.0005J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 0.00025J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 0.0002J <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/27/17 <0.0010 <0.0010 <0.0010 <0.0010 <0.0020 <0.00050 <0.0010 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0020 <0.050 <0.0040 <0.020 <0.0020 <0.010 <0.0020 <0.000508/14/08 <0.0005 <0.005 <0.005 <0.005 0.0011J <0.0007 <0.005 <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005 <0.05 <0.005 <0.01 0.0011J <0.01 <0.01 <0.051/31/09 0.00012J <0.001 0.00019J <0.001 <0.001 0.00014J <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00032J <0.001 <0.001 <0.0014/20/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 <0.001 <0.001 <0.001 <0.00112/17/09 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0007 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.005 <0.001 <0.005 0.00018J <0.001 <0.001 <0.001MW-41MW-44MW-42MW-45MW-43Page 9 of 20
Table 8: Analytical Data for GroundwaterDSCA ID No.: DC670003Benzenecis-1,2-DichloroethyleneEthylbenzeneMethyl tert-butyl ether(MTBE)NaphthaleneTetrachloroethyleneToluenetrans-1,2-DichloroethyleneTrichloroethyleneVinyl chlorideXylenes (total)1,1-DichloroethyleneChloroformAcetoneCarbon DisulfideVinyl AcetateChloromethane2-HexanoneChloroethaneDiisopropyl EtherGroundwater Sampling PointSampling Date (mm/dd/yy)[mg/L]ADT 8DP-01 20'-24' 1/24/08 <0.001 <0.001 <0.001 NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NADP-02 21'-25' 1/24/080.00160.024 <0.001 NA NA0.095<0.001 <0.0010.031<0.001 <0.002 NA NA NA NA NA NA NA NA NADP-03 17'-21' 1/24/08 <0.005 <0.005 <0.005 NA NA0.2<0.005 <0.0050.013<0.005 <0.010 NA NA NA NA NA NA NA NA NADP-04 22'-26' 1/24/08 <0.001 <0.001 <0.001 NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NADP-05 27'-31' 1/24/08 <0.001 <0.001 <0.001 NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NADP-06 23'-27' 1/25/08 <0.001 <0.001 <0.001 NA NA0.022<0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NAMP-03 21'-25' 1/24/08 <0.001 <0.001 <0.001 NA NA0.0023<0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NAMP-06 20'-24' 1/24/08 <0.001 <0.001 <0.001 NA NA0.0037<0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NAMP-08 26'-30' 1/24/080.00220.003 <0.001 NA NA0.083<0.001 <0.0010.0089<0.001 <0.002 NA NA NA NA NA NA NA NA NAMP-09 23'-27' 1/25/080.00180.013 <0.001 NA NA0.032<0.001 <0.0010.013<0.001 <0.002 NA NA NA NA NA NA NA NA NAMP-10 22'-26' 1/23/08 <0.001 <0.001 <0.001 NA NA <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 NA NA NA NA NA NA NA NA NA0.001 0.07 0.6 0.02 0.006 0.0007 0.6 0.1 0.0033x10-50.5 0.007 0.076 0.7 NE 0.003 NE 3 0.07NC 2L StandardPage 10 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)SB01 12/18/07 <0.01 <0.005 <0.005 <0.005 NA NA NA NA NA NA NA NA NA NA NA NASB02 12/18/07 <0.01 <0.005 <0.005 <0.005 NA NA NA NA NA NA NA NA NA NA NA NASB08 12/19/07 <0.01 <0.005 <0.005 <0.005 NA NA NA NA NA NA NA NA NA NA NA NASB10 12/19/07 <0.01 <0.005 <0.005 <0.005 NA NA NA NA NA NA NA NA NA NA NA NASB11 12/19/07 <0.01 <0.005 <0.005 <0.005 NA NA NA NA NA NA NA NA NA NA NA NA1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 0.00027J <0.01 NA NA NA NA NA NA NA NA NA8/19/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.01 NA NA NA NA NA NA NA NA NA10/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.25 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 NA NA NA NA NA NA NA NA NA3/17/10 <0.05 <0.025 <0.025 <0.025 <0.025 <0.05 <0.05 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 0.003J <0.005 <0.005 <0.005 <0.01 0.0064J NA NA NA NA NA NA NA NA NA5/26/15 <0.0080 <0.0020 <0.0020 <0.020 <0.0040 <0.040 <0.080 0.0036 J 0.0022 J 0.0022 J 0.0020 J 0.0027 J 0.014 0.0022 J <0.00038 <0.000481/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA1/28/09 <0.1 <0.02 <0.02 <0.02 <0.02 <0.02 <0.001 NA NA NA NA NA NA NA NA NA4/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 0.0084 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/22/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/26/15 <0.20 <0.050 <0.050 <0.50 <0.10 <1.0 <2.0 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.0096 <0.012MW-4MW-7Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)Page 11 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)5/23/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/28/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/22/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/23/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/15/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA1/29/09 <0.1 <0.020.017J<0.02 <0.02 <0.02 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/22/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/26/15 <0.20 <0.050 <0.050 <0.50 <0.10 <1.0 <2.0 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.0096 <0.01212/26/17 <0.080 <0.020 <0.020 <0.20 <0.040 <0.40 <0.80 <0.040 <0.040 <0.080 <0.080 <0.040 0.023J <0.080 <0.040 <0.080MW-7CMW-8MW-7BPage 12 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA10/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 0.0073 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 0.00027J 0.068 NA NA NA NA NA NA NA NA NA3/18/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 0.0073J NA NA NA NA NA NA NA NA NA12/26/17 <0.10 <0.025 <0.025 <0.25 <0.050 <0.50 <1.00.25 0.0860.013J0.09J0.012J 0.39 0.084J 0.015J <0.101/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA3/15/10 <0.5 <0.25 <0.25 <0.25 <0.25 <0.5 <0.5 NA NA NA NA NA NA NA NA NA5/22/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 0.00091J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/15/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/22/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA8/18/09 <0.01 <0.005 <0.005 <0.005 0.00025J <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NAMW-15CMW-11MW-17MW-15AMW-15BMW-14Page 13 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA10/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/23/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/26/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA1/28/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/22/08 <0.01 <0.005 <0.005 0.00096J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/29/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/22/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/29/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NAMW-24AMW-24BMW-24CMW-23Page 14 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.05 <0.01 <0.01 <0.01 <0.01 <0.01 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 0.003 0.001 <0.001 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 0.00042J 0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 0.0013J <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/23/10 <0.05 <0.025 <0.025 <0.025 0.0071J <0.05 <0.05 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/26/15 <0.050 <0.012 <0.012 <0.12 <0.025 <0.25 <0.50 0.029 <0.025 0.047 <0.0250.1 0.520.24 <0.0024 <0.003012/26/17 <0.040 <0.010 <0.010 <0.10 <0.020 <0.20 <0.40 0.012J <0.020 0.015J <0.040 0.043 0.004J 0.054 <0.020 <0.040MW-30 1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA5/23/08 <0.01 <0.005 0.00057J <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/28/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/15/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/22/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/22/08 <0.01 <0.005 0.00041J <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA9/23/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NAMW-32MW-31MW-29Page 15 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)5/22/08 <0.01 <0.005 0.0004J <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 0.00057J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 0.0033J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/13/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/26/15 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.000096 <0.000125/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/13/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 0.00076J 0.00021J <0.005 0.0005J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/13/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 0.00063J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/18/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/26/15 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.000096 <0.0001212/27/17 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0010 <0.0020 <0.0010 <0.0020MW-36AMW-33MW-34MW-35AMW-35BMW-35CPage 16 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)5/21/08 <0.01 <0.005 <0.005 0.00056J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/18/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/27/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/18/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/29/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/25/12 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/27/15 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.000096 <0.000125/21/08 <0.01 <0.005 <0.005 0.0011J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 0.0011J <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NAMW-37BMW-37CMW-36BMW-36CMW-37APage 17 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)5/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/29/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/27/15 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.000096 <0.0001212/27/17 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0010 <0.0020 <0.0010 <0.00205/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA3/16/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA5/21/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/16/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA5/20/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/27/17 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0010 <0.0020 <0.0010 <0.00205/22/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.01 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NAMW-38AMW-39MW-38BMW-40MW-38CPage 18 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)5/23/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/27/17 <0.0020 <0.00050 0.00044J <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0010 <0.0020 <0.0010 <0.00206/6/08 <0.01 <0.005 <0.005 <0.001 NA NA <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA8/19/09 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA10/14/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/15/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 0.024 NA NA NA NA NA NA NA NA NA3/17/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 0.012 NA NA NA NA NA NA NA NA NA7/28/10 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA8/14/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/30/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/27/17 <0.0020 <0.00050 <0.00050 <0.0050 <0.0010 <0.010 <0.020 <0.0010 <0.0010 <0.0020 <0.0020 <0.0010 <0.0010 <0.0020 <0.0010 0.00080J8/14/08 <0.01 <0.005 <0.005 <0.005 <0.005 <0.01 <0.01 NA NA NA NA NA NA NA NA NA1/31/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA4/20/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NA12/17/09 <0.005 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA NA NA NA NA NA NA NA NAMW-45MW-43MW-41MW-44MW-42Page 19 of 20
Table 8(1): Analytical Data for Groundwater (User Specified Chemicals)DSCA ID No.: DC670003Bromomethanetrans-1,3-DichloropropaneBromodichloromethaneMethylene ChlorideStyrene4-Methyl-2-pentanone2-Butanonen-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenetert-ButylbenzeneDichlorodifluoromethane (Freon 12)Sampling Date (mm/dd/yy)[mg/L]Groundwater Sampling PointADT 8(1)DP-01 20'-24' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NADP-02 21'-25' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NADP-03 17'-21' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NADP-04 22'-26' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NADP-05 27'-31' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NADP-06 23'-27' 1/25/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAMP-03 21'-25' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAMP-06 20'-24' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAMP-08 26'-30' 1/24/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAMP-09 23'-27' 1/25/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAMP-10 22'-26' 1/23/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANE NE 0.0006 0.005 0.07 NE 4 0.07 0.07 0.07 0.025 0.07 0.4 0.4 0.07 1NC 2L StandardPage 20 of 20
Table 12: Analytical Data for Natural Attenuation ParametersDSCA ID No.: DC670003Sampling Date (mm/dd/yy)Dissolved oxygen (DO)NitrateSulfateMajor CationsMethaneFerrous IronOxidation reduction potential (ORP)AlkalinityChloride (optional)ConductivitypHTemperatureTotal organic carbon (TOC)EthaneEtheneUnitsmg/L mg/L mg/L mg/L mg/L mg/LmVmg/L mg/Lμs/cm2std unit° Cmg/L mg/L mg/L8/19/2009 0.30 <0.0079 20.70 NA NA NA -172.4 NA NA 163 4.73 25.03 1.700 NA NA10/16/2009 0.31 <0.5 1.15 NA 0.0044 5.00 -137.2 NA NA 975 6.67 19.70 201.000 0.0032 0.018012/15/2009 0.42 <0.5 1.03 NA 0.2800 2.00 -191.0NA NA 481 11.09 19.91 37.500 0.0034 0.00883/17/2010 0.56 <0.01 1.45J NA 0.6500 4.00 -118.7 NA NA 387 6.39 19.03 10.000 0.0028 0.00685/26/2015 0.58 NA NA NA NA NA -91.1 NA NA 392 6.26 20.52 NA NA NA4/14/2009 4.09 3.790 56.30 NA <0.0012 NA 210.5 NA NA 456 4.83 18.15 1.760 <0.0025 <0.00328/19/2009 3.73 0.048 29.50 NA <0.0012 NA 194.0 NA NA 217 4.67 23.70 0.686J <0.0025 <0.003210/15/2009 1.78 1.580 36.60 NA <0.0012 0.00 337.1 NA NA 289 4.60 19.90 0.630J <0.0025 <0.003212/15/2009 2.12 0.864 60.40 NA <0.0012 1.00 48.6 NA NA 281 4.71 19.45 88.100 <0.0025 <0.00323/17/2010 3.90 1.100 33.90 NA 0.0021 0.17 231.0 NA NA 224 4.77 16.75 0.999J <0.0025 <0.00329/22/2010 0.36 0.438 45.3J NA 0.2000 1.00 36.4 NA NA 300 4.96 23.98 0.804J <0.0025 <0.00325/26/2015 0.43 NA NA NA NA NA 218.4 NA NA 232 4.86 21.18 NA NA NA4/14/2009 0.57 <0.5 42.70 NA 0.0020 NA 13.9 NA NA 527 6.73 19.02 0.717J <0.0025 <0.00328/19/2009 0.40 <0.0079 38.60 NA <0.0012 NA -92.9 NA NA 513 6.80 19.32 0.488J <0.0025 <0.003210/15/2009 0.44 <0.5 36.40 NA <0.0012 2.00 -48.1 NA NA 505 6.82 18.31 0.792J <0.0025 <0.003212/15/2009 0.39 <0.5 32.20 NA <0.0012 1.40 -20.3 NA NA 450 7.99 19.71 <1 <0.0025 <0.00323/17/2010 0.74 <0.01 9.44 NA <0.0012 0.00 -119.8 NA NA 413 6.73 18.64 0.595J <0.0025 <0.00329/22/2010 0.31 <0.01 6.80 NA <0.0012 0.80 -86.2 NA NA 393 7.62 24.35 0.266J <0.0025 <0.00324/14/2009 0.48 <0.5 11.10 NA 0.0021 NA 64.4 NA NA 414 7.45 18.76 1.040 <0.0025 <0.00328/19/2009 0.52 <0.0079 10.10 NA <0.0012 NA -77.6 NA NA 441 7.64 36.33 1.260 <0.0025 <0.003210/15/2009 0.53 <0.5 8.97 NA <0.0012 NA -96.5 NA NA 334 7.25 18.36 <1 <0.0025 <0.003212/15/2009 0.54 <0.5 9.22 NA <0.0012 0.60 -55.2 NA NA 368 9.08 19.66 <1 <0.0025 <0.00323/15/2010 0.68 <0.05 37.90 NA <0.0012 NA -157.4 NA NA 502 6.36 19.53 1.020 <0.0025 <0.00324/15/2009 2.39 2.080 37.00 NA <0.0012 NA 66.8 NA NA 180 4.22 17.63 4.170 <0.0025 <0.00328/19/2009 2.44 0.198 27.40 NA <0.0012 NA 105.5 NA NA 253 5.08 25.48 0.671J <0.0025 <0.003210/15/2009 0.46 0.550 27.10 NA <0.0012 1.90 53.4 NA NA 234 5.19 20.81 4.780 <0.0025 <0.003212/15/2009 0.59 1.300 25.20 NA <0.0012 2.80 97.1 NA NA 267 5.36 19.69 0.790J <0.0025 <0.00323/17/2010 0.96 6.120 8.28 NA 0.2200 0.60 181.6 NA NA 175 4.9118.28 0.784J <0.0025 <0.00329/22/2010 0.31 2.460 16.30 NA 0.0860 0.20 -25.2 NA NA 461 5.13 24.91 0.701J <0.0025 <0.00325/26/2015 0.36 NA NA NA NA NA -37.9 NA NA 465 5.36 21.67 NA NA NA12/26/2017 0.89 NA NA NA NA NA -28.7 NA NA 455 5.44 16.88 NA NA NASample IDMW-4MW-7MW-7BMW-7CMW-8ADT 12Page 1 of 10
Table 12: Analytical Data for Natural Attenuation ParametersDSCA ID No.: DC670003Sampling Date (mm/dd/yy)Dissolved oxygen (DO)NitrateSulfateMajor CationsMethaneFerrous IronOxidation reduction potential (ORP)AlkalinityChloride (optional)ConductivitypHTemperatureTotal organic carbon (TOC)EthaneEtheneUnitsmg/L mg/L mg/L mg/L mg/L mg/LmVmg/L mg/Lμs/cm2std unit° Cmg/L mg/L mg/LSample IDADT 12MW-9 4/15/2009 2.39 NA NA NA NA NA 66.8 NA NA 180 4.22 17.63 NA NA NA8/15/2009 0.81 NA NA NA NA NA 36.6 NA NA NA 3.50 26.62 NA NA NA10/14/2009 1.20 0.444J 34.80 NA <0.0012 NA 338.1 NA NA 140 4.44 19.41 1.110 <0.0025 <0.00324/15/2009 0.65 <0.5 15.60 NA 0.0037 NA 58.9 NA NA 170 4.75 17.03 3.320 <0.0025 <0.003210/16/2009 0.52 <0.5 0.92 NA 0.0250 3.00 -124.6 NA NA 650 6.15 18.37 241.000 0.0068 0.017012/15/2009 0.42 <0.5 0.58 NA 0.3300 3.40 -116.7NA NA 449 9.37 19.57 78.500 <0.0025 0.00683/18/2010 0.86 <0.01 1.84J NA 0.6000 1.00 -159.2NA NA 331 5.80 16.26 11.700 <0.0025 0.004812/26/2017 1.01 NA NA NA NA NA -130.6 NA NA 317 5.88 16.05 NA NA NAMW-15A 3/15/2010 0.83 <0.05 13.00 NA 0.0022 NA 41.7 NA NA 269 5.55 17.22 9.500 <0.0025 <0.00324/15/2009 0.41 <0.5 34.80 NA <0.0012 NA -89.6 NA NA 551 6.30 19.08 0.948J <0.0025 <0.00328/19/2009 0.44 <0.0079 35.80 NA 0.0073 NA -134.4 NA NA 541 7.05 25.80 0.532J <0.0025 <0.003210/15/2009 0.64 <0.5 31.80 NA 0.0022 NA -80.5 NA NA 439 7.08 17.25 <1 <0.0025 <0.003212/16/2009 0.41 <0.5 35.40 NA <0.0012 NA -77.4 NA NA 551 7.01 17.58 <1 <0.0025 <0.00323/15/2010 0.92 <0.05 36.50 NA <0.0012 NA -93.5 NA NA 566 6.69 20.06 0.769J <0.0025 <0.00324/15/2009 0.56 NA NA NA NA NA -108.2 NA NA 412 7.04 19.25 NA NA NA12/16/2009 63.00 NA NA NA NA NA -106.3 NA NA 409 7.24 18.33 NA NA NA8/18/2009 0.80 NA NA NA NA NA -91.9 NA NA 288 5.77 31.96 NA NA NA10/14/2009 0.25 <0.5 6.68 NA 0.0014 NA -48.9 NA NA 316 5.81 23.36 4.860 <0.0025 <0.00324/15/2009 0.51 3.720 28.60 NA 0.0024 NA 190.4 NA NA 239 4.05 18.91 2.940 <0.0025 <0.00328/20/2009 0.34 4.140 22.80 NA <0.0012 NA 167.2 NA NA 289 4.92 27.68 3.440 <0.0025 <0.003210/15/2009 0.59 2.340 19.80 NA 0.0019 NA 358.7 NA NA 262 4.31 23.05 2.760 <0.0025 <0.003212/16/2009 1.21 12.900 15.20 NA <0.0012 NA 180.0 NA NA 281 1.34 15.80 1.210 <0.0025 <0.00323/17/2010 0.97 26.700 13.70 NA <0.0012 NA 349.2 NA NA 508 4.35 17.18 1.270 <0.0025 <0.00329/23/2010 0.38 17.900 10.50 NA 0.0014 NA 38.4 NA NA 426 4.70 30.07 1.140 <0.0025 <0.00324/16/2009 0.56 0.407J 43.20 NA 0.0080 NA 184.1 NA NA 153 4.13 20.31 1.080 <0.0025 <0.00328/20/2009 NA 0.286J 43.90 NA 0.0027 NA NA NA NA NA NA NA 1.750 <0.0025 <0.003212/16/2009 0.77 0.121J 25.30 NA 0.0056 NA 141.7 NA NA 116 3.18 13.23 1.050 <0.0025 <0.00323/16/2010 1.30 0.174 34.30 NA 0.0040 NA 270.1 NA NA 152 4.47 14.81 1.020 <0.0025 <0.0032MW-11MW-14MW-15BMW-15CMW-17MW-23MW-24APage 2 of 10
Table 12: Analytical Data for Natural Attenuation ParametersDSCA ID No.: DC670003Sampling Date (mm/dd/yy)Dissolved oxygen (DO)NitrateSulfateMajor CationsMethaneFerrous IronOxidation reduction potential (ORP)AlkalinityChloride (optional)ConductivitypHTemperatureTotal organic carbon (TOC)EthaneEtheneUnitsmg/L mg/L mg/L mg/L mg/L mg/LmVmg/L mg/Lμs/cm2std unit° Cmg/L mg/L mg/LSample IDADT 124/16/2009 1.42 2.520 22.70 NA <0.0012 NA 98.5 NA NA 233 5.53 21.38 0.916J <0.0025 <0.00328/20/2009 1.29 2.610 21.30 NA <0.0012 NA 13.5 NA NA 254 6.00 24.80 <1 <0.0025 <0.003212/16/2009 2.12 3.670 15.80 NA <0.0012 NA 143.0 NA NA 174 2.66 14.94 <1 <0.0025 <0.00323/16/2010 3.84 3.250 21.30 NA <0.0012 NA 237.6 NA NA 212 4.94 16.69 0.702J <0.0025 <0.00324/16/2009 0.50 NA NA NA NA NA -152.6 NA NA 432 7.49 23.11 NA NA NA12/16/2009 0.38 NA NA NA NA NA -198.3 NA NA 341 11.27 14.55 NA NA NA4/16/2009 0.67 <0.5 0.99 NA 0.8300 NA -71.7 NA NA 308 6.40 17.53 3.800 <0.0025 <0.00328/20/2009 0.87 <0.5 1.94 NA NA NA -130.6 NA NA 402 6.08 25.25 2.970 NA NA10/14/2009 0.40 <0.5 6.99 NA 0.6200 NA -140.4NA NA 620 6.15 20.63 3.300 <0.0025 <0.003212/16/2009 0.28 <0.5 5.32 NA 0.2200 NA -82.1 NA NA 340 6.01 20.31 2.600 <0.0025 <0.00323/16/2010 1.01 0.019 10.7J NA 0.2500 NA -101.8NA NA 381 6.04 15.36 3.300 <0.0025 <0.00329/23/2010 0.26 0.021J 3.35 NA 0.1900 NA -111.8 NA NA 312 6.81 26.20 2.460 <0.0025 <0.00325/26/2015 0.83 NA NA NA NA NA 309.8 NA NA 237 4.57 22.38 NA NA NA12/26/2017 0.96 NA NA NA NA NA 280.7 NA NA 212 4.78 16.20 NA NA NA4/15/2009 0.70 <0.5 32.50 NA <0.0012 NA 228.7 NA NA 136 4.03 17.08 <1 <0.0025 <0.00328/19/2009 0.64 <0.0079 23.10 NA <0.0012 NA -44.2 NA NA 115 3.62 26.28 0.457J <0.0025 <0.003210/14/2009 1.38 <0.5 26.20 NA <0.0012 NA 347.1 NA NA 109 4.29 19.28 <1 <0.0025 <0.003212/15/2009 1.47 <0.5 24.10 NA <0.0012 NA 177.2 NA NA 124 2.34 19.09 <1 <0.0025 <0.00323/15/2010 4.01 0.037J 36.40 NA <0.0012 NA 231.2 NA NA 166 4.82 17.87 1.200 <0.0025 <0.00329/22/2010 1.07 0.040 23.40 NA 0.0013 NA 69.6 NA NA 104 3.76 25.10 0.729J <0.0025 <0.00324/16/2009 5.52 4.410 34.60 NA <0.0012 NA 203.6 NA NA 181 4.86 16.33 0.734J <0.0025 <0.00328/20/2009 4.03 4.460 51.30 NA <0.0012 NA 208.1 NA NA 274 4.75 23.89 0.602J <0.0025 <0.003210/14/2009 5.10 3.600 44.20 NA <0.0012 NA 295.4 NA NA 258 5.23 19.85 0.522J <0.0025 <0.003212/16/2009 5.36 6.200 32.50 NA <0.0012 NA 278.4 NA NA 175 4.74 18.17 <1 <0.0025 <0.00323/17/2010 7.57 2.500 31.90 NA <0.0012 NA 301.7 NA NA 234 4.56 17.33 0.789J <0.0025 <0.00329/23/2010 4.54 6.050 35.60 NA <0.0012 NA 34.6 NA NA 255 5.01 26.51 1.070 <0.0025 <0.00324/20/2009 2.75 NA NA NA NA NA 89.7 NA NA 163 3.91 21.45 NA NA NA12/17/2009 3.30 NA NA NA NA NA 182.3 NA NA 132 2.36 15.67 NA NA NAMW-24BMW-24CMW-29MW-31MW-32MW-33Page 3 of 10
Table 12: Analytical Data for Natural Attenuation ParametersDSCA ID No.: DC670003Sampling Date (mm/dd/yy)Dissolved oxygen (DO)NitrateSulfateMajor CationsMethaneFerrous IronOxidation reduction potential (ORP)AlkalinityChloride (optional)ConductivitypHTemperatureTotal organic carbon (TOC)EthaneEtheneUnitsmg/L mg/L mg/L mg/L mg/L mg/LmVmg/L mg/Lμs/cm2std unit° Cmg/L mg/L mg/LSample IDADT 124/15/2009 0.63 NA NA NA NA NA 151.5 NA NA 110 4.12 18.29 NA NA NA12/17/2009 0.93 NA NA NA NA NA 154.8 NA NA 109 2.13 18.64 NA NA NA4/13/2009 0.45 NA NA NA NA NA -117.1 NA NA 530 7.37 17.13 NA NA NA12/17/2009 0.25 NA NA NA NA NA -122.8 NA NA 504 6.79 17.81 NA NA NA5/26/2015 0.74 NA NA NA NA NA 312.3 NA NA 218 5.78 21.41 NA NA NA4/13/2009 0.48 NA NA NA NA NA -56.2 NA NA 273 7.10 18.27 NA NA NA12/17/2009 0.33 NA NA NA NA NA -63.7 NA NA 277 6.06 17.56 NA NA NA4/13/2009 0.53 NA NA NA NA NA -152.0 NA NA 394 7.55 18.65 NA NA NA12/17/2009 0.44 NA NA NA NA NA -131.6 NA NA 431 6.77 16.55 NA NA NA4/15/2009 0.51 NA NA NA NA NA 12.0 NA NA 240 5.49 18.41 NA NA NA12/18/2009 0.36 NA NA NA NA NA 90.9 NA NA 289 5.85 17.55 NA NA NA5/26/2015 0.86 NA NA NA NA NA 342.6 NA NA 229 5.73 21.92 NA NA NA12/27/2017 0.97 NA NA NA NA NA 312.7 NA NA 240 5.75 15.98 NA NA NA4/15/2009 0.54 NA NA NA NA NA -128.4 NA NA 381 6.47 19.41 NA NA NA12/18/2009 0.30 NA NA NA NA NA -129.2 NA NA 542 7.06 17.51 NA NA NA4/15/2009 0.48 NA NA NA NA NA -131.4 NA NA 491 6.65 20.36 NA NA NA12/18/2009 0.81 NA NA NA NA NA -108.3 NA NA 450 7.22 17.57 NA NA NA4/17/2009 0.38 <0.5 35.10 NA 0.0097 NA 32.0 NA NA 235 6.17 19.07 <1 <0.0025 <0.00328/20/2009 0.37 <0.5 36.60 NA 0.0047 NA -80.3 NA NA 296 5.80 25.09 <1 <0.0025 <0.003212/16/2009 NA <0.5 30.00 NA 0.0032 NA NA NA NA NA NA NA 0.819J <0.0025 <0.00323/16/2010 NA <0.05 36.80 NA 0.0029 NA NA NA NA NA NA NA 0.702J <0.0025 <0.00325/27/2015 1.00 NA NA NA NA NA 160.1 NA NA 271 5.08 22.20 NA NA NA4/17/2009 0.34 <0.5 4.74 NA 0.0210 NA -155.1NA NA 379 7.81 19.29 0.571J <0.0025 <0.00328/20/2009 0.30 <0.5 5.57 NA 0.0200 NA -159.3NA NA 462 7.22 23.02 0.616J <0.0025 <0.003212/16/2009 NA <0.5 2.14 NA 0.0110 NA NA NA NA NA NA NA 1.570 <0.0025 <0.00323/16/2010 NA <0.05 2.37 NA 0.0068 NA NA NA NA NA NA NA 0.775J <0.0025 <0.0032MW-37C 4/17/2009 0.36 NA NA NA NA NA -117.7 NA NA 374 7.96 19.56 NA NA NA4/16/2009 0.44 0.518 35.30 NA 0.0016 NA 153.6 NA NA 146 4.70 20.78 1.030 <0.0025 <0.00328/20/2009 0.28 0.43J 39.40 NA NA NA 104.3 NA NA 179 4.58 27.72 <0.001 NA NA12/16/2009 0.64 0.763 28.20 NA <0.0012 NA 135.0 NA NA 120 2.52 15.59 <1 <0.0025 <0.00323/16/2010 0.76 0.546 28.20 NA <0.0012 NA 275.6 NA NA 157 4.48 15.63 1.090 <0.0025 <0.00325/27/2015 0.91 NA NA NA NA NA 269.8 NA NA 159 4.94 22.23 NA NA NA12/27/2017 0.98 NA NA NA NA NA 278.7 NA NA 151 5.06 16.16 NA NA NAMW-34MW-35AMW-35BMW-35CMW-36AMW-36BMW-36CMW-37AMW-37BMW-38APage 4 of 10
Table 12: Analytical Data for Natural Attenuation ParametersDSCA ID No.: DC670003Sampling Date (mm/dd/yy)Dissolved oxygen (DO)NitrateSulfateMajor CationsMethaneFerrous IronOxidation reduction potential (ORP)AlkalinityChloride (optional)ConductivitypHTemperatureTotal organic carbon (TOC)EthaneEtheneUnitsmg/L mg/L mg/L mg/L mg/L mg/LmVmg/L mg/Lμs/cm2std unit° Cmg/L mg/L mg/LSample IDADT 124/17/2009 0.59 <0.5 30.70 NA 0.0140 NA -131.9NA NA 410 7.30 16.01 1.060 <0.0025 <0.00328/20/2009 0.49 <0.5 33.00 NA NA NA -126.3 NA NA 550 7.03 25.41 0.992J NA NA12/16/2009 0.37 <0.5 25.80 NA 0.0044 NA -110.5 NA NA 405 9.36 15.10 <1 <0.0025 <0.00323/16/2010 1.11 <0.05 28.60 NA 0.0029 NA 115.0 NA NA 500 6.50 15.60 0.794J <0.0025 <0.00324/17/2009 0.44 NA NA NA NA NA -142.5 NA NA 363 7.95 18.82 NA NA NA12/16/2009 0.50 NA NA NA NA NA -107.8 NA NA 322 10.04 13.91 NA NA NA4/20/2009 0.65 NA NA NA NA NA 70.8 NA NA NA 4.92 20.30 NA NA NA12/17/2009 0.54 NA NA NA NA NA 41.1 NA NA 172 5.67 18.16 NA NA NA12/27/2017 0.67 NA NA NA NA NA 52.7 NA NA 186 5.72 16.10 NA NA NA4/20/2009 0.45 NA NA NA NA NA -54.7 NA NA 319 6.49 18.39 NA NA NA12/17/2009 0.84 NA NA NA NA NA -68.1 NA NA 449 8.08 17.51 NA NA NA4/20/2009 1.71 NA NA NA NA NA 200.1 NA NA 223 4.52 20.15 NA NA NA12/17/2009 2.00 NA NA NA NA NA 161.1 NA NA 171 2.48 16.14 NA NA NA12/26/2017 1.76 NA NA NA NA NA 130.6 NA NA 190 4.02 16.12 NA NA NA4/20/2009 0.42 NA NA NA NA NA -77.6 NA NA 115 5.42 17.73 NA NA NA12/17/2009 4.37 NA NA NA NA NA -123.7 NA NA 367 5.72 16.66 NA NA NA4/14/2009 2.91 NA NA NA NA NA 199.0 NA NA 161 5.43 18.34 NA NA NA8/19/2009 1.28 <0.0079 15.10 NA <0.0012 NA 101.1 NA NA 143 4.81 28.47 0.318J <0.0025 <0.003210/14/2009 3.29 0.207J 19.50 NA <0.0012 NA 280.4 NA NA 115 4.85 17.24 <1 <0.0025 <0.003212/15/2009 1.29 0.251J 17.80 NA <0.0012 NA -38.3 NA NA 369 5.11 18.69 149.000 <0.0025 <0.00323/17/2010 1.88 0.012 18.60 NA 0.0310 NA -63.6 NA NA 340 5.22 17.34 93.500 <0.0025 <0.00327/28/2010 0.96 0.064 8.20 NA NA NA -160.7 NA NA 159 5.51 25.86 1.020 NA NA4/20/2009 2.74 NA NA NA NA NA 149.1 NA NA 125 4.39 18.07 NA NA NA12/17/2009 3.82 NA NA NA NA NA 269.6 NA NA 150 4.43 15.46 NA NA NA12/27/2017 2.57 NA NA NA NA NA 250.1 NA NA 160 4.62 16.20 NA NA NA4/20/2009 2.13 NA NA NA NA NA 122.4 NA NA 130 3.85 19.43 NA NA NA12/17/2009 3.00 NA NA NA NA NA 151.7 NA NA 104 2.87 14.00 NA NA NAMW-38BMW-38CMW-39MW-40MW-41MW-42MW-43MW-44MW-45Page 5 of 10
Table 12(1): Analytical Data for Natural Attenuation Parameters (User Specified Parameters)DSCA ID No.: DC670003Sampling Date (mm/dd/yy)Total IronDissolved IronTotal Ferrous IronDissolved Ferrous IronSulfideNitriteUnitsmg/L mg/L mg/L mg/L mg/L mg/L8/19/2009 NA NA NA NA <0.05 NA10/16/2009 >1.2 >1.2 5.00 2.6 NA <0.512/15/2009 >1.2 >1.2 2.00 2.0 NA <0.53/17/2010 0.20 NA 4.00 NA 0.18 0.008J5/26/2015 NA NA NA NA NA NA4/14/2009 NA NA NA NA 0.0305J <0.58/19/2009 NA NA NA NA <0.05 <0.0110/15/2009 0.00 0.00 0.00 0.0 NA <0.512/15/2009 1.10 1.10 1.00 0.8 NA <0.53/17/2010 0.17 1.00 0.17 1.0 <0.05 0.003J9/22/2010 0.80 0.70 1.00 1.0 0.009J 0.0325/26/2015 NA NA NA NA NA NA4/14/2009 NA NA NA NA 0.0206J <0.58/19/2009 NA NA NA NA <0.05 <0.0110/15/2009 0.20 0.20 2.00 2.0 NA <0.512/15/2009 1.20 1.20 1.40 1.0 NA <0.53/17/2010 0.20 0.20 0.00 0.0 <0.05 <0.019/22/2010 1.00 0.30 0.80 0.0 0.018J <0.014/14/2009 NA NA NA NA 0.0305J <0.58/19/2009 NA NA NA NA <0.05 <0.0110/15/2009 NA NA NA NA NA <0.512/15/2009 0.50 0.80 0.60 0.4 NA <0.53/15/2010 NA NA NA NA <0.05 <0.014/15/2009 NA NA NA NA 0.428J <0.58/19/2009 NA NA NA NA <0.05 <0.0110/15/2009 >1.2 <1.2 1.90 1.4 NA <0.512/15/2009 >1.2 >1.2 2.80 2.8 NA <0.53/17/2010 0.20 0.16 0.60 0.6 <0.05 0.0309/22/2010 0.80 1.20 0.20 0.2 0.011J 0.0335/26/2015 NA NA NA NA NA NA12/26/2017 NA NA NA NA NA NASample IDMW-4MW-7MW-7BMW-7CMW-8ADT 12(1)Page 6 of 10
Table 12(1): Analytical Data for Natural Attenuation Parameters (User Specified Parameters)DSCA ID No.: DC670003Sampling Date (mm/dd/yy)Total IronDissolved IronTotal Ferrous IronDissolved Ferrous IronSulfideNitriteUnitsmg/L mg/L mg/L mg/L mg/L mg/LSample IDADT 12(1)MW-9 4/15/2009 NA NA NA NA NA NA8/15/2009 NA NA NA NA NA NA10/14/2009 NA NA NA NA NA <0.54/15/2009 NA NA NA NA 1.8600 <0.510/16/2009 >1.2 >1.2 3.00 4.2 NA <0.512/15/2009 >1.2 NA 3.40 2.0 NA <0.53/18/2010 0.20 0.20 1.00 1.0 3.0000 <0.0112/26/2017 NA NA NA NA NA NAMW-15A 3/15/2010 NA NA NA NA <0.05 <0.014/15/2009 NA NA NA NA <0.05 0.138J8/19/2009 NA NA NA NA <0.05 <0.0110/15/2009 NA NA NA NA NA <0.512/16/2009 NA NA NA NA NA NA3/15/2010 NA NA NA NA <0.05 <0.014/15/2009 NA NA NA NA NA NA12/16/2009 NA NA NA NA NA NA8/18/2009 NA NA NA NA NA NA10/14/2009 NA NA NA NA NA <0.54/15/2009 NA NA NA NA 0.0231J <0.58/20/2009 NA NA NA NA <0.05 <0.510/15/2009 NA NA NA NA NA <0.512/16/2009 NA NA NA NA NA NA3/17/2010 NA NA NA NA <0.05 0.006J9/23/2010 NA NA NA NA 0.02J 0.0264/16/2009 NA NA NA NA 0.0379J <0.58/20/2009 NA NA NA NA <0.05 <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 0.012MW-11MW-14MW-15BMW-15CMW-17MW-23MW-24APage 7 of 10
Table 12(1): Analytical Data for Natural Attenuation Parameters (User Specified Parameters)DSCA ID No.: DC670003Sampling Date (mm/dd/yy)Total IronDissolved IronTotal Ferrous IronDissolved Ferrous IronSulfideNitriteUnitsmg/L mg/L mg/L mg/L mg/L mg/LSample IDADT 12(1)4/16/2009 NA NA NA NA <0.05 <0.058/20/2009 NA NA NA NA <0.05 <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 <0.014/16/2009 NA NA NA NA NA NA12/16/2009 NA NA NA NA NA NA4/16/2009 NA NA NA NA 0.103J <0.58/20/2009 NA NA NA NA 0.1070 <0.510/14/2009 NA NA NA NA NA <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA 0.0960 0.009J9/23/2010 NA NA NA NA 0.1900 <0.015/26/2015 NA NA NA NA NA NA12/26/2017 NA NA NA NA NA NA4/15/2009 NA NA NA NA 0.0157J <0.58/19/2009 NA NA NA NA <0.05 <0.0110/14/2009 NA NA NA NA NA <0.512/15/2009 NA NA NA NA NA <0.53/15/2010 NA NA NA NA <0.05 <0.019/22/2010 NA NA NA NA 0.009J <0.014/16/2009 NA NA NA NA 0.0231J <0.58/20/2009 NA NA NA NA <0.05 <0.510/14/2009 NA NA NA NA NA <0.512/16/2009 NA NA NA NA NA NA3/17/2010 NA NA NA NA <0.05 <0.019/23/2010 NA NA NA NA 0.016J <0.014/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NAMW-24BMW-24CMW-29MW-31MW-32MW-33Page 8 of 10
Table 12(1): Analytical Data for Natural Attenuation Parameters (User Specified Parameters)DSCA ID No.: DC670003Sampling Date (mm/dd/yy)Total IronDissolved IronTotal Ferrous IronDissolved Ferrous IronSulfideNitriteUnitsmg/L mg/L mg/L mg/L mg/L mg/LSample IDADT 12(1)4/15/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA4/13/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA5/26/2015 NA NA NA NA NA NA4/13/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA4/13/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA4/15/2009 NA NA NA NA NA NA12/18/2009 NA NA NA NA NA NA5/26/2015 NA NA NA NA NA NA12/27/2017 NA NA NA NA NA NA4/15/2009 NA NA NA NA NA NA12/18/2009 NA NA NA NA NA NA4/15/2009 NA NA NA NA NA NA12/18/2009 NA NA NA NA NA NA4/17/2009 NA NA NA NA <0.05 <0.58/20/2009 NA NA NA NA <0.05 <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 <0.015/27/2015 NA NA NA NA NA NA4/17/2009 NA NA NA NA 0.0256J <0.58/20/2009 NA NA NA NA 0.0241J <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 <0.01MW-37C 4/17/2009 NA NA NA NA NA NA4/16/2009 NA NA NA NA 0.0379J <0.58/20/2009 NA NA NA NA 0.0169J <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 <0.015/27/2015 NA NA NA NA NA NA12/27/2017 NA NA NA NA NA NAMW-34MW-35AMW-35BMW-35CMW-36AMW-36BMW-36CMW-37AMW-37BMW-38APage 9 of 10
Table 12(1): Analytical Data for Natural Attenuation Parameters (User Specified Parameters)DSCA ID No.: DC670003Sampling Date (mm/dd/yy)Total IronDissolved IronTotal Ferrous IronDissolved Ferrous IronSulfideNitriteUnitsmg/L mg/L mg/L mg/L mg/L mg/LSample IDADT 12(1)4/17/2009 NA NA NA NA 0.0798 <0.58/20/2009 NA NA NA NA 0.0688 <0.512/16/2009 NA NA NA NA NA NA3/16/2010 NA NA NA NA <0.05 <0.014/17/2009 NA NA NA NA NA NA12/16/2009 NA NA NA NA NA NA4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA12/27/2017 NA NA NA NA NA NA4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA12/26/2017 NA NA NA NA NA NA4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA4/14/2009 NA NA NA NA NA NA8/19/2009 NA NA NA NA <0.05 <0.0110/14/2009 NA NA NA NA NA <0.512/15/2009 NA NA NA NA NA <0.53/17/2010 NA NA NA NA 0.4500 0.0167/28/2010 NA NA NA NA 0.3600 0.012JB4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NA12/27/2017 NA NA NA NA NA NA4/20/2009 NA NA NA NA NA NA12/17/2009 NA NA NA NA NA NAMW-38BMW-38CMW-39MW-40MW-41MW-42MW-43MW-44MW-45Page 10 of 10
ATTACHMENT 8

GROUNDWATER CONCENTRATION TREND PLOTS
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE VC
Sampling Sampling
Event Date
1 1/23/2008 0.5 0.01 0.01 0.01 0.01
2 8/19/2009 0.41 0.0027 0.0017 0.0025 0.00025
3 8/19/2009 0.36 0.0019 0.0014 0.0005 0.0005
4 10/16/2009 1.1 0.025 0.0089 0.0005 0.00017
5 12/15/2009 0.16 0.025 3 0.062 0.025
6 3/17/2010 0.00175 0.007 0.91 0.003 0.00125
7 10/25/2012 0.03 0.022 3.5 0.003 0.0033
8 5/26/2015 0.038 0.009 0.06 0.002 0.004
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.13 0.76 1.57 1.96 1.53
Mann-Kendall Statistic (S):-16 3 12 3 6Confidence Factor:96.9%59.4%91.1%61.4%72.6%
Concentration Trend:Decreasing No Trend Prob. Increasing No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-4 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-4
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
VC
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE VC
Sampling Sampling
Event Date
1 1/23/2008 5.5 0.05 0.05 0.05
2 1/28/2009 8.6 0.032 0.027 0.01
3 4/14/2009 5.4 0.027 0.022 0.0005
4 8/19/2009 0.37 0.0038 0.0044 0.00025
5 10/15/2009 0.26 0.0025 0.0032 0.0005
6 12/15/2009 0.034 0.0006 0.00058 0.0005
7 3/17/2010 0.0087 0.0014 0.0025 0.00025
8 9/22/2010 0.16 0.0014 0.0025 0.00025
9 10/25/2012 1.3 0.008 0.0062 0.00037
10 5/26/2015 4.7 0.05 0.05 0.1
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.19 1.15 1.16 2.05
Mann-Kendall Statistic (S):-17 -13 -13 -11Confidence Factor:92.2%85.4%85.4%81.0%
Concentration Trend:Prob. Decreasing No Trend No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-7A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-7A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
VC
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/23/2008 0.22 0.0025 0.0025
2 1/28/2009 0.021 0.00019 0.0009
3 4/14/2009 0.0016 0.00012 0.00055
4 8/19/2009 0.00035 0.0014 0.0005
5 10/15/2009 0.00035 0.000094 0.0003
6 12/15/2009 0.00041 0.0005 0.0004
7 3/17/2010 0.00035 0.0014 0.0025
8 9/22/2010 0.00035 0.0014 0.0025
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:2.52 0.91 0.82
Mann-Kendall Statistic (S):-18 1 -3Confidence Factor:98.4%50.0%59.4%
Concentration Trend:Decreasing No Trend Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-7B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-7B
ATC Associates of North Carolina, P.C.
0.00001
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10 08/10 11/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/23/2008 0.00035 0.0025
2 1/30/2009 0.000092 0.0002
3 4/14/2009 0.001 0.0005
4 8/19/2009 0.00035 0.0025
5 10/15/2009 0.00035 0.0005
6 12/15/2009 0.00028 0.00022
7 3/15/2010 0.00035 0.0025
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.71 0.90
Mann-Kendall Statistic (S):-1 1Confidence Factor:50.0%50.0%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-7C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-7C
ATC Associates of North Carolina, P.C.
0.00001
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 1/23/2008 2.4 0.05 0.05 0.05
2 1/29/2009 3.5 0.32 0.21 0.01
3 4/15/2009 4.1 0.016 0.0097 0.005
4 8/19/2009 2.7 0.013 0.01 0.0025
5 10/15/2009 0.74 0.0051 0.0083 0.0005
6 12/15/2009 3.3 0.04 0.035 0.00039
7 3/17/2010 0.039 0.00059 0.0017 0.0025
8 9/22/2010 0.022 0.0014 0.0025 0.0025
9 10/25/2012 1.2 0.031 0.036 0.0025
10 5/26/2015 6.1 0.05 0.05 0.05
11 12/26/2017 1.6 0.041 0.04 0.02
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.80 1.76 1.43 1.43
Mann-Kendall Statistic (S):-9 -6 -2 -4Confidence Factor:72.9%64.8%53.0%59.0%
Concentration Trend:Stable No Trend No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-8 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-8
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE VC
Sampling Sampling
Event Date
1 1/23/2008 0.76 0.01 0.01 0.01 0.01
2 4/15/2009 0.42 0.0059 0.00066 0.0005 0.0005
3 10/16/2009 0.23 0.0054 0.014 0.0005 0.0005
4 12/15/2009 0.99 0.17 2.2 0.036 0.0005
5 3/18/2010 0.65 0.2 3.3 0.0025 0.0017
6 12/26/2017 3 0.26 0.67 0.025 0.05
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.00 1.06 1.35 1.20 1.87
Mann-Kendall Statistic (S):5 9 9 4 4Confidence Factor:76.5%93.2%93.2%70.3%70.3%
Concentration Trend:No Trend Prob. Increasing Prob. Increasing No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-14 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-14
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
VC
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/22/2008 0.00035
2 1/31/2009 0.0021
3 4/15/2009 0.0019
4 8/19/2009 0.00035
5 10/15/2009 0.00035
6 12/16/2009 0.0002
7 3/15/2010 0.00035
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.03
Mann-Kendall Statistic (S):-9Confidence Factor:88.1%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-15B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-15B
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/22/2008 0.00035
2 1/31/2009 0.00031
3 4/15/2009 0.00099
4 12/16/2009 0.00015
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.82
Mann-Kendall Statistic (S):-2Confidence Factor:62.5%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-15C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-15C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE
Sampling Sampling
Event Date
1 1/23/2008 0.0025 0.0005
2 4/15/2009 0.0011 0.00018
3 8/20/2009 0.00067 0.00013
4 10/15/2009 0.00081 0.00023
5 12/16/2009 0.0014 0.0003
6 3/17/2010 0.0013 0.00065
7 9/23/2010 0.0011 0.00071
8 10/26/2012 0.001 0.0014
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.46 0.82
Mann-Kendall Statistic (S):-5 18Confidence Factor:68.3%98.4%
Concentration Trend:Stable Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-23 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-23
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
04/07 11/07 06/08 12/08 07/09 01/10 08/10 02/11 09/11 04/12 10/12 05/13Concentration (mg/L)Sampling Date
PCE
TCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 1/23/2008 0.57 0.11 0.047 0.01
2 1/28/2009 0.1 0.075 0.086 0.0005
3 4/16/2009 0.1 0.086 0.091 0.00031
4 8/20/2009 0.13 0.083 0.076 0.0005
5 12/16/2009 0.077 0.058 0.091 0.0024
6 3/16/2010 0.059 0.048 0.094 0.00078
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.14 0.29 0.22 1.57
Mann-Kendall Statistic (S):-10 -11 10 0Confidence Factor:95.2%97.2%95.2%39.3%
Concentration Trend:Decreasing Decreasing Increasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-24A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-24A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
11/07 02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/22/2008 0.024 0.00066 0.0025
2 1/29/2009 0.035 0.0003 0.00015
3 4/16/2009 0.022 0.0003 0.00014
4 8/20/2009 0.02 0.00012 0.0005
5 12/16/2009 0.028 0.00019 0.0005
6 3/16/2010 0.026 0.0014 0.0025
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.21 0.97 1.08
Mann-Kendall Statistic (S):-1 -2 3Confidence Factor:50.0%57.0%64.0%
Concentration Trend:Stable Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-24B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-24B
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/22/2008 0.00035
2 1/29/2009 0.00027
3 4/16/2009 0.00025
4 12/16/2009 0.0002
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.23
Mann-Kendall Statistic (S):-6Confidence Factor:95.8%
Concentration Trend:Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-24C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-24C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE VC
Sampling Sampling
Event Date
1 1/23/2008 0.01 0.01 0.58 0.01 0.01
2 1/31/2009 0.00175 0.0025 0.16 0.0025 0.0025
3 4/16/2009 0.0014 0.005 0.22 0.005 0.005
4 8/20/2009 0.000098 0.0005 0.25 0.0005 0.00065
5 10/14/2009 0.00019 0.00022 0.12 0.0005 0.00033
6 12/16/2009 0.00055 0.0013 0.14 0.0054 0.0005
7 3/16/2010 0.00035 0.0014 0.46 0.0027 0.0011
8 9/23/2010 0.00175 0.043 0.84 0.0058 0.00125
9 10/25/2012 0.0034 0.0005 0.18 0.0025 0.0005
10 5/26/2015 0.01 0.0125 0.4 0.0125 0.025
11 12/26/2017 0.011 0.01 0.32 0.01 0.02
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.19 1.58 0.67 0.78 1.43
Mann-Kendall Statistic (S):17 5 7 14 2Confidence Factor:89.1%61.9%67.6%84.0%53.0%
Concentration Trend:No Trend No Trend No Trend No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-29 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-29
ATC Associates of North Carolina, P.C.
0.00001
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
VC
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/23/2008 0.00035
2 1/28/2009 0.011
3 4/15/2009 0.00073
4 8/19/2009 0.00035
5 10/14/2009 0.00025
6 12/15/2009 0.00026
7 3/15/2010 0.00035
8 9/22/2010 0.00035
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:2.20
Mann-Kendall Statistic (S):-8Confidence Factor:80.1%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-31 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-31
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10 08/10 11/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/22/2008 0.0098 0.0025 0.0025
2 1/31/2009 0.017 0.00014 0.00014
3 4/16/2009 0.018 0.00013 0.0005
4 8/20/2009 0.038 0.00032 0.00014
5 10/14/2009 0.017 0.0001 0.0005
6 12/16/2009 0.0091 0.0005 0.0005
7 3/17/2010 0.003 0.0014 0.0025
8 9/23/2010 0.0038 0.0014 0.0025
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.77 1.07 0.97
Mann-Kendall Statistic (S):-11 5 9Confidence Factor:88.7%68.3%83.2%
Concentration Trend:Stable No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-32 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-32
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10 08/10 11/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/22/2008 0.00035
2 1/31/2009 0.00033
3 4/20/2009 0.00033
4 12/17/2009 0.00033
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.03
Mann-Kendall Statistic (S):-3Confidence Factor:72.9%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-33 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-33
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035
2 1/27/2009 0.00064
3 4/15/2009 0.00032
4 12/17/2009 0.00028
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.41
Mann-Kendall Statistic (S):-4Confidence Factor:83.3%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-34 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-34
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035
2 1/27/2009 0.0085
3 4/13/2009 0.00035
4 12/17/2009 0.00035
5 5/26/2015 0.00025
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.87
Mann-Kendall Statistic (S):-5Confidence Factor:82.1%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-35A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-35A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035
2 1/27/2009 0.0013
3 4/13/2009 0.00035
4 12/17/2009 0.00035
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.81
Mann-Kendall Statistic (S):-1Confidence Factor:50.0%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-35B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-35B
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035
2 1/27/2009 0.00027
3 4/13/2009 0.00035
4 12/17/2009 0.00035
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.12
Mann-Kendall Statistic (S):1Confidence Factor:50.0%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-35C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-35C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 5/21/2008 0.16 0.027 0.017 0.0025
2 1/27/2009 0.19 0.041 0.027 0.0005
3 4/15/2009 0.17 0.036 0.025 0.0005
4 12/18/2009 0.23 0.045 0.027 0.00012
5 10/25/2012 0.14 0.032 0.02 0.0025
6 5/26/2015 0.05 0.023 0.015 0.0005
7 12/27/2017 0.038 0.011 0.0064 0.0005
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.51 0.38 0.38 1.01
Mann-Kendall Statistic (S):-11 -9 -10 -4Confidence Factor:93.2%88.1%90.7%66.7%
Concentration Trend:Prob. Decreasing Stable Prob. Decreasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-36A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-36A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035 0.0025
2 1/27/2009 0.00086 0.00019
3 4/15/2009 0.00042 0.000096
4 12/18/2009 0.00035 0.0005
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.50 1.38
Mann-Kendall Statistic (S):-1 -2Confidence Factor:50.0%62.5%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-36B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-36B
ATC Associates of North Carolina, P.C.
0.00001
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
TCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035 0.0025
2 1/27/2009 0.00079 0.0002
3 4/15/2009 0.00023 0.0005
4 12/18/2009 0.00035 0.0005
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.57 1.15
Mann-Kendall Statistic (S):-1 -1Confidence Factor:50.0%50.0%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-36C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-36C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
TCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 5/21/2008 0.04 0.0085 0.0092 0.0025
2 1/29/2009 0.012 0.00032 0.0005 0.0005
3 4/17/2009 0.041 0.0095 0.011 0.0005
4 8/20/2009 0.051 0.0081 0.012 0.0005
5 12/16/2009 0.059 0.011 0.012 0.00012
6 3/16/2010 0.051 0.012 0.011 0.0025
7 10/25/2012 0.03 0.0088 0.0084 0.0025
8 5/27/2015 0.0023 0.0005 0.0003 0.0005
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.56 0.61 0.61 0.90
Mann-Kendall Statistic (S):-1 4 -4 -1Confidence Factor:50.0%64.0%64.0%50.0%
Concentration Trend:Stable No Trend Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-37A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-37A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/21/2008 0.0015 0.0025 0.0008
2 1/30/2009 0.0035 0.0005 0.0005
3 4/17/2009 0.00022 0.00013 0.0005
4 8/20/2009 0.00031 0.0005 0.0005
5 12/16/2009 0.00024 0.0005 0.0005
6 3/16/2010 0.00035 0.0014 0.0025
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.28 0.96 0.91
Mann-Kendall Statistic (S):-3 0 1Confidence Factor:64.0%39.3%50.0%
Concentration Trend:No Trend Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-37B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-37B
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035
2 1/30/2009 0.00035
3 4/17/2009 0.00018
4 12/16/2009 0.00035
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.28
Mann-Kendall Statistic (S):-1Confidence Factor:50.0%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-37C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-37C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/21/2008 0.0093 0.0025 0.0025
2 1/29/2009 0.039 0.0087 0.0094
3 4/16/2009 0.0089 0.00033 0.0005
4 8/20/2009 0.01 0.00026 0.0005
5 12/16/2009 0.0099 0.00037 0.00016
6 3/16/2010 0.009 0.0014 0.0025
7 5/27/2015 0.0017 0.0005 0.0005
8 12/27/2017 0.00025 0.0005 0.0005
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.09 1.58 1.50
Mann-Kendall Statistic (S):-16 -3 -9Confidence Factor:96.9%59.4%83.2%
Concentration Trend:Decreasing No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-38A CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-38A
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035 0.0025 0.0025
2 1/30/2009 0.0039 0.0005 0.0005
3 4/17/2009 0.00016 0.00024 0.0005
4 8/20/2009 0.00017 0.00024 0.00021
5 12/16/2009 0.00016 0.0005 0.0005
6 3/16/2010 0.00035 0.0014 0.0025
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.77 1.00 0.96
Mann-Kendall Statistic (S):-3 -1 -1Confidence Factor:64.0%50.0%50.0%
Concentration Trend:No Trend Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-38B CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-38B
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10 05/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE
Sampling Sampling
Event Date
1 5/21/2008 0.00035 0.0025
2 1/30/2009 0.00032 0.0005
3 4/17/2009 0.00013 0.00011
4 12/16/2009 0.00035 0.0005
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.37 1.20
Mann-Kendall Statistic (S):-1 -3Confidence Factor:50.0%72.9%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-38C CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-38C
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
TCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/22/2008 0.00035
2 1/30/2009 0.00021
3 4/20/2009 0.00035
4 12/17/2009 0.00035
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.22
Mann-Kendall Statistic (S):1Confidence Factor:50.0%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-40 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-40
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 5/23/2008 0.001
2 1/30/2009 0.0012
3 4/20/2009 0.00092
4 12/17/2009 0.00095
5 12/27/2017 0.00043
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.32
Mann-Kendall Statistic (S):-6Confidence Factor:88.3%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-41 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-41
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
10/06 02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 6/6/2008 0.00054 0.00085 0.0024 0.0025
2 1/30/2009 0.0005 0.00038 0.018 0.0005
3 4/20/2009 0.00063 0.00081 0.0023 0.0005
4 12/17/2009 0.00059 0.00081 0.0024 0.00011
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.10 0.31 1.25 1.20
Mann-Kendall Statistic (S):2 -1 -1 -5Confidence Factor:62.5%50.0%50.0%89.6%
Concentration Trend:No Trend Stable No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-42 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-42
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE TCE cis-1,2-DCE trans-1,2-DCE
Sampling Sampling
Event Date
1 1/31/2009 0.49 0.017 0.037 0.00033
2 4/14/2009 0.55 0.018 0.047 0.00039
3 8/19/2009 0.027 0.00081 0.0016 0.0025
4 10/14/2009 0.15 0.0034 0.013 0.0005
5 12/15/2009 0.026 0.00029 0.0013 0.0005
6 3/17/2010 0.0054 0.0014 0.00095 0.0025
7 7/28/2010 0.00086 0.0014 0.0025 0.0025
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.34 1.31 1.31 0.84
Mann-Kendall Statistic (S):-17 -8 -11 13Confidence Factor:99.5%84.5%93.2%96.5%
Concentration Trend:Decreasing No Trend Prob. Decreasing Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-43 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-43
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
12/08 03/09 07/09 10/09 01/10 05/10 08/10 11/10Concentration (mg/L)Sampling Date
PCE
TCE
cis-1,2-DCE
trans-1,2-DCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 8/14/2008 0.00035
2 1/30/2009 0.00024
3 4/20/2009 0.00035
4 12/17/2009 0.00035
5 12/27/2017 0.00025
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.19
Mann-Kendall Statistic (S):-1Confidence Factor:50.0%
Concentration Trend:Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-44 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-44
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
02/08 07/09 11/10 04/12 08/13 12/14 05/16 09/17 02/19Concentration (mg/L)Sampling Date
PCE
PCE
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:mg/L
Sampling Point ID:PCE
Sampling Sampling
Event Date
1 8/14/2008 0.00035
2 1/31/2009 0.00014
3 4/20/2009 0.00035
4 12/17/2009 0.00035
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.35
Mann-Kendall Statistic (S):1Confidence Factor:50.0%
Concentration Trend:No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MW-45 CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
27-Feb-18 DC670003
Coastal Dry Cleaners MW-45
ATC Associates of North Carolina, P.C.
0.0001
0.001
0.01
0.1
1
06/08 09/08 12/08 03/09 07/09 10/09 01/10Concentration (mg/L)Sampling Date
PCE
PCE
ATTACHMENT 15

LABORATORY ANALYTICAL REPORT

Page 1 of 34
Table of Contents
Table of Contents
Sample Summary 3
Hits Only Report 4
Case Narrative 7
Sample Results 8
17L1209-01 8
17L1209-02 10
17L1209-03 12
17L1209-04 14
17L1209-05 16
17L1209-06 18
17L1209-07 20
17L1209-08 22
Sample Preparation Information 24
QC Data 25
Volatile Organic Compounds by GC/MS 25
B194310 25
Flag/Qualifier Summary 29
Certifications 30
Chain of Custody/Sample Receipt 32
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ATC Associates - Raleigh
Raleigh, NC 27604
2725 E. Millbrook Rd., Suite 121
Ms. Kristen Speight
Enclosed is the analytical report for the above referenced project. The data herein applies to
samples as received by H&P Mobile Geochemistry, Inc. on 30-Jan-18 which were analyzed in
accordance with the attached Chain of Custody record(s).
The results for all sample analyses and required QA/QC analyses are presented in the following
sections and summarized in the documents:
•Sample Summary
•Case Narrative (if applicable)
•Sample Results
•Quality Control Summary
•Notes and Definitions / Appendix
•Chain of Custody
•Sampling Logs (if applicable)
Unless otherwise noted, I certify that all analyses were performed and reviewed in compliance with
our Quality Systems Manual and Standard Operating Procedures. This report shall not be
reproduced, except in full, without the written approval of H&P Mobile Geochemistry, Inc.
We at H&P Mobile Geochemistry, Inc. sincerely appreciate the opportunity to provide analytical
services to you on this project. If you have any questions or concerns regarding this analytical report,
please contact me at your convenience at 760-804-9678.
Sincerely,
05 February 2018
Janis La Roux
Laboratory Director
H&P Mobile Geochemistry, Inc. is certified under the California ELAP and the National Environmental
Laboratory Accreditation Conference (NELAC). H&P is approved as an Environmental Testing Laboratory and
Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs,
accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV.
Client Project: Coastal Swansboro
H&P Project: ATC013018-11
Dear Ms. Kristen Speight:
P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com
2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CAQuality. Accuracy. Experience.
Geochemistry Inc.Mobile
Page 1 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
Sample ID Laboratory ID Matrix Date Sampled
ANALYTICAL REPORT FOR SAMPLES
Date Received
SGMP-VP1 E801097-01 Vapor 19-Jan-18 30-Jan-18
SGMP-6 (5')E801097-02 Vapor 19-Jan-18 30-Jan-18
SGMP-6 (10')E801097-03 Vapor 19-Jan-18 30-Jan-18
SGMP-5 (5')E801097-04 Vapor 19-Jan-18 30-Jan-18
SGMP-5 (10')E801097-05 Vapor 19-Jan-18 30-Jan-18
Page 2 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
DETECTIONS SUMMARY
Sample ID:Laboratory ID:
Analyte Result Limit Units Method
E801097-01SGMP-VP1
Notes
Reporting
Tetrachloroethene 8500 34 ug/m3 EPA TO-15
Sample ID:Laboratory ID:
Analyte Result Limit Units Method
E801097-02SGMP-6 (5')
Notes
Reporting
cis-1,2-Dichloroethene 18 4.0 ug/m3 EPA TO-15
Trichloroethene 510 5.5 ug/m3 EPA TO-15
Tetrachloroethene 2200 6.9 ug/m3 EPA TO-15
Sample ID:Laboratory ID:
Analyte Result Limit Units Method
E801097-03SGMP-6 (10')
Notes
Reporting
cis-1,2-Dichloroethene 30 4.0 ug/m3 EPA TO-15
Trichloroethene 600 5.5 ug/m3 EPA TO-15
Tetrachloroethene 2500 6.9 ug/m3 EPA TO-15
Sample ID:Laboratory ID:
Analyte Result Limit Units Method
E801097-04SGMP-5 (5')
Notes
Reporting
cis-1,2-Dichloroethene 250 4.0 ug/m3 EPA TO-15
Trichloroethene 1900 5.5 ug/m3 EPA TO-15
Tetrachloroethene 4500 34 ug/m3 EPA TO-15
Sample ID:Laboratory ID:
Analyte Result Limit Units Method
E801097-05SGMP-5 (10')
Notes
Reporting
cis-1,2-Dichloroethene 21 4.0 ug/m3 EPA TO-15
Trichloroethene 14 5.5 ug/m3 EPA TO-15
Tetrachloroethene 23 6.9 ug/m3 EPA TO-15
Page 3 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.
Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
SGMP-VP1 (E801097-01) Vapor Sampled: 19-Jan-18 Received: 30-Jan-18
EPA TO-1501-Feb-18 01-Feb-18ug/m3 EB801112Vinyl chloride 5.2ND
""""""trans-1,2-Dichloroethene 16ND
""""""cis-1,2-Dichloroethene 8.0ND
""""""Trichloroethene 11ND
""""5Tetrachloroethene "348500
""""98.9 %76-134Surrogate: 1,2-Dichloroethane-d4
""""101 %78-125Surrogate: Toluene-d8
""""97.2 %77-127Surrogate: 4-Bromofluorobenzene
SGMP-6 (5') (E801097-02) Vapor Sampled: 19-Jan-18 Received: 30-Jan-18
EPA TO-1501-Feb-18 01-Feb-18ug/m3 EB801111Vinyl chloride 2.6ND
""""""trans-1,2-Dichloroethene 8.0ND
"""""cis-1,2-Dichloroethene "4.018
"""""Trichloroethene "5.5510
"""""Tetrachloroethene "6.92200
""""98.8 %76-134Surrogate: 1,2-Dichloroethane-d4
""""103 %78-125Surrogate: Toluene-d8
""""97.4 %77-127Surrogate: 4-Bromofluorobenzene
SGMP-6 (10') (E801097-03) Vapor Sampled: 19-Jan-18 Received: 30-Jan-18
EPA TO-1501-Feb-18 01-Feb-18ug/m3 EB801111Vinyl chloride 2.6ND
""""""trans-1,2-Dichloroethene 8.0ND
"""""cis-1,2-Dichloroethene "4.030
"""""Trichloroethene "5.5600
"""""Tetrachloroethene "6.92500
""""96.8 %76-134Surrogate: 1,2-Dichloroethane-d4
""""105 %78-125Surrogate: Toluene-d8
""""99.6 %77-127Surrogate: 4-Bromofluorobenzene
Page 4 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
Volatile Organic Compounds by EPA TO-15
H&P Mobile Geochemistry, Inc.
Result Analyte Limit
Reporting
Units
Dilution
Batch Prepared Analyzed Method Notes Factor
SGMP-5 (5') (E801097-04) Vapor Sampled: 19-Jan-18 Received: 30-Jan-18
EPA TO-1501-Feb-18 01-Feb-18ug/m3 EB801111Vinyl chloride 2.6ND
""""""trans-1,2-Dichloroethene 8.0ND
"""""cis-1,2-Dichloroethene "4.0250
"""""Trichloroethene "5.51900
""""5Tetrachloroethene "344500
""""102 %76-134Surrogate: 1,2-Dichloroethane-d4
""""82.9 %78-125Surrogate: Toluene-d8
""""98.5 %77-127Surrogate: 4-Bromofluorobenzene
SGMP-5 (10') (E801097-05) Vapor Sampled: 19-Jan-18 Received: 30-Jan-18
EPA TO-1501-Feb-18 01-Feb-18ug/m3 EB801111Vinyl chloride 2.6ND
""""""trans-1,2-Dichloroethene 8.0ND
"""""cis-1,2-Dichloroethene "4.021
"""""Trichloroethene "5.514
"""""Tetrachloroethene "6.923
""""98.0 %76-134Surrogate: 1,2-Dichloroethane-d4
""""83.0 %78-125Surrogate: Toluene-d8
""""98.4 %77-127Surrogate: 4-Bromofluorobenzene
Page 5 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by EPA TO-15 - Quality Control
H&P Mobile Geochemistry, Inc.
Batch EB80111 - TO-15
Blank (EB80111-BLK1)Prepared & Analyzed: 01-Feb-18
Vinyl chloride ug/m32.6ND
trans-1,2-Dichloroethene "8.0ND
cis-1,2-Dichloroethene "4.0ND
Trichloroethene "5.5ND
Tetrachloroethene "6.9ND
"214 76-134Surrogate: 1,2-Dichloroethane-d4 96.5207
"207 78-125Surrogate: Toluene-d8 84.2174
"364 77-127Surrogate: 4-Bromofluorobenzene 97.9357
LCS (EB80111-BS1)Prepared & Analyzed: 01-Feb-18
Vinyl chloride ug/m3 52.0 64-12796.02.650
trans-1,2-Dichloroethene "80.8 67-1241188.095
cis-1,2-Dichloroethene "80.0 70-12191.54.073
Trichloroethene "110 71-1231025.5110
Tetrachloroethene "138 66-1241096.9150
"214 76-134Surrogate: 1,2-Dichloroethane-d4 98.4211
"207 S-GC78-125Surrogate: Toluene-d8 72.4150
"364 77-127Surrogate: 4-Bromofluorobenzene 98.9361
LCS Dup (EB80111-BSD1)Prepared & Analyzed: 01-Feb-18
Vinyl chloride ug/m3 52.0 2564-127102 5.752.653
trans-1,2-Dichloroethene "80.8 2567-124118 0.4228.095
cis-1,2-Dichloroethene "80.0 2570-12192.2 0.7664.074
Trichloroethene "110 2571-123104 2.365.5110
Tetrachloroethene "138 2566-124109 0.5496.9150
"214 76-134Surrogate: 1,2-Dichloroethane-d4 99.3213
"207 S-GC78-125Surrogate: Toluene-d8 77.3160
"364 77-127Surrogate: 4-Bromofluorobenzene 101369
Page 6 of 7
Project:
Project Number:
Project Manager:
Reported:
ATC Associates - Raleigh
2725 E. Millbrook Rd., Suite 121
ATC013018-11
Coastal Swansboro
Ms. Kristen SpeightRaleigh, NC 27604 05-Feb-18 14:48
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
H&P Mobile
Geochemistry Inc.
Notes and Definitions
S-GC Surrogate recovery outside of control limits. The data was accepted based on valid recovery of the remaining surrogate(s).
Percent Recovery
Relative Percent DifferenceRPD
%REC
Method Detection LimitMDL
Analyte NOT DETECTED at or above the reporting limitND
Leak Check CompoundLCC
Appendix
H&P Mobile Geochemistry, Inc. is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program
and ISO/IEC 17025:2005 programs, accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV.
H&P is approved by the State of Arizona as an Environmental Testing Laboratory and Mobile Laboratory, certification numbers AZM758 and AZ0779.
H&P is approved by the State of California as an Environmental Laboratory and Mobile Laboratory in conformance with the Environmental Laboratory
Accreditation Program (ELAP) for the category of Volatile and Semi-Volatile Organic Chemistry of Hazardous Waste, certification numbers 2740, 2741,
2743, 2744, 2745, 2754 & 2930.
H&P is approved by the State of Florida Department of Health under the National Environmental Laboratory Accreditation Conference (NELAC)
certification number E871100.
The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at
www.handpmg.com/about/certifications.
All soil results are reported in wet weight.
Page 7 of 7
p Mobile
Geochemistry, Inc.
2470 Impala Drive, Carlsbad, CA 92010
& Field Office - Signal Hill, CA
W handpmg.com E [e-mail]
P 760.804.9678 F 760.804.9159
VAPOR I AIR Chain of Custody DATE: /4?d?
Page / of_ j_
Lab Client and Project Information Sample Receipt (Lab Use Only)
Lab Client/Consultant: ATC A /-56Glatic, Project Name / #: L act 5/ki 1 .C:,--ti ,i.shoro Date Rec'd: (I3 0 (e SO Ot-to JD) Control #: 4.1......
Lab Client Project Manager: ko-L5./e...4 5 e, ii ,./. Project Location: ,<",....,/„,,,751,0,-,0 /VG /
H&P Project # A-ro. 01 5011K-Aff I i
Lab Client Address:2ns, 4,.., .4/7,s,-00 itt, si, A g r /2 /
'
Report E-Mail(s):
*,5,4,1. , 44 oc4s.se.c.loi-f.c 0,11
Lab Work Order # e go 10 ,17
Lab Client City, State, Zip: Rot te,,-, A , N c 2 76 oti Sample Intact: Yes Below • No • See Notes
Phone Number: C.?! 1 c- 5? '7/ - ©9 9 ci Receipt Gauge ID: 30005 Temp: N T
Reporting Requirements Turnaround Time Sampler Information Outside Lab:
PA tandafd Report q Level III q Level IV 15415-7 day Stnd q 24-Hr Rush
q 3-day Rush • Mobile Lab
q 48-Hr Rush • Other:
Sampler(s): Los4e7i._ t. J.,4_,,e, 0 Receipt Notes/Tracking #:
Lab PM Initials: 0---)
..,c, .1 r,/-41 1.,/ 1.--../15/11 Sfe,e)-elfIC.-)7_,UTILDICID50q3 3161° Signature z. .....,4.1 .,/ • Excel EDD • Other EDD:
q CA Geotracker Global ID: Date: / _ /1_7 g
Additional Instruction to 14b_ oratory: c IT ,L),,, a /Ivo , #4, vit i.e. , 4-,-,64/evoc
',-, 3pec , )76.
it / 7YoeX../
one): - -.)
ot lot / A /..i , er-- A.//:574e A 5,0. e, 41/4 • / II- 1 / _ I 5 4-# s /Z-4 ,c1, roe/4,111w / 4-iu I IL?. -c/,'Wor-ge /47 ev
t)- TFET i 1;;, I r
'• - - ' —, - ) VOCs Standard Full List E 8260SV [1 TO-15 VOCs Short List / Project List [11 8260SV UTO-15 Oxygenates [j] 8260SV El TO-15 Naphthalene 111 8260SV LITO-15 TPHv as Gas Ej 8260SVm q TO-15m Aromatic/Aliphatic Fractions q 8260SVm q TO-15m Leak Check Compound q DFA El IPA q He — Methane by EPA 8015m i Fixed Gases by ASTM D1945 q CO2 I] 02 E N2 47.., , .7x7--, , ! , -de ' y7 A-79-4
* Preferred VOC units (please choose
si • p.g/L q µg/m3 q ppbv • ppmv -
SAMPLE NAME
FIELD POINT
NAME
(if applicable)
DATE
mm/dd/yy
TIME
24hr clock
SAMPLE TYPE
Indoor Air (IA), Ambient
Air (AA), Subslab (SS),
Soil Vapor (SV)
CONTAINER
SIZE & TYPE
400mUl Li6L Summa,
Tedlar, Tube, etc.
w _
fx
12 is"
8 Lab use only: Receipt Vac GA1P- ii?-1- t-/9--/g 11.3o 3.5 -/-00,, IL 1 i-15" .2(0 X
.S6_4,1 p - 6 I's') 1 2115" . C V 23 6. .09 X
SGA4i9 - 6 (fa') 1330 5 1./ oog ilia Y
SG.A•IP- ,c (3-') /00 V 062 . 1 °9 X
c6.Aip - 3.-- ( mi ) /5-415" 31/ O.5 .21 X
Company. Date: Time:
tIc., 1-2L-ii 8 i ‘ 00
A.:prc eliquistc1,9 by: 4......„,.. Received by: 4,014, (....41441.4.z.yitA„\_ Comppkp IDN 0 / 1 2 Time
1 0 : 15
Approved/Relinquished by: Company: Date: Time: Received by: Company: Date: Time:
Approved/Relinquished by: Company: Date: Time: Received by: Company: Date: Time:
Appendix 6A1, Rev 5/23/2016, Effective 5/23/2016 'Approval constitutes as authorization to proceed h analysis and acceptance of conditions on back

ATTACHMENT 16

SOIL GAS RISK CALCULATORS

DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Residence, 635 West Corbett Avenue, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-5 (5')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 250 7.5 - -
127-18-4 Tetrachloroethylene 4500 135 1.1E+01 8.3E+00 1.3E-05 3.2E+00
79-01-6 Trichloroethylene 1900 57 4.8E-01 4.2E-01 1.2E-04 2.7E+01
Cumulative: 1.3E-04 3.1E+01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Residence, 635 West Corbett Avenue, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-5 (10')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 21 0.63 - -
127-18-4 Tetrachloroethylene 23 0.69 1.1E+01 8.3E+00 6.4E-08 1.7E-02
79-01-6 Trichloroethylene 14 0.42 4.8E-01 4.2E-01 8.8E-07 2.0E-01
Cumulative: 9.4E-07 2.2E-01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Farm Bureau, 623 Sabiston Drive, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-6 (5')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 18 0.54 - -
127-18-4 Tetrachloroethylene 2200 66 1.1E+01 8.3E+00 6.1E-06 1.6E+00
79-01-6 Trichloroethylene 510 15.3 4.8E-01 4.2E-01 3.2E-05 7.3E+00
Cumulative: 3.8E-05 8.9E+00
DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Farm Bureau, 623 Sabiston Drive, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-6 (5')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 18 0.18 - -
127-18-4 Tetrachloroethylene 2200 22 4.7E+01 3.5E+01 4.7E-07 1.3E-01
79-01-6 Trichloroethylene 510 5.1 3.0E+00 1.8E+00 1.7E-06 5.8E-01
Cumulative: 2.2E-06 7.1E-01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Non-Residential Worker
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Farm Bureau, 623 Sabiston Drive, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-6 (10')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 30 0.9 - -
127-18-4 Tetrachloroethylene 2500 75 1.1E+01 8.3E+00 6.9E-06 1.8E+00
79-01-6 Trichloroethylene 600 18 4.8E-01 4.2E-01 3.8E-05 8.6E+00
Cumulative: 4.5E-05 1.0E+01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Farm Bureau, 623 Sabiston Drive, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-6 (10')
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
156-59-2 Dichloroethylene, 1,2-cis- 30 0.3 - -
127-18-4 Tetrachloroethylene 2500 25 4.7E+01 3.5E+01 5.3E-07 1.4E-01
79-01-6 Trichloroethylene 600 6 3.0E+00 1.8E+00 2.0E-06 6.8E-01
Cumulative: 2.5E-06 8.3E-01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Non-Residential Worker
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Express Alterations, 630 W. Corbett Avenue, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-VP1
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
127-18-4 Tetrachloroethylene 8500 255 1.1E+01 8.3E+00 2.4E-05 6.1E+00
Cumulative: 2.4E-05 6.1E+00
DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.
DSCA ID No:
Name/Address of DSCA Site:Coastal Dry Cleaners, 328 West Corbett Avenue, Swansboro, North Carolina
Name/Address of Sampling Location:Express Alterations, 630 W. Corbett Avenue, Swansboro, North Carolina
Sampling Date:1/19/2018
Sample ID:SGMP-VP1
All concentrations are in ug/m3
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor
Air Concentration
(ug/m3)
Indoor Air
Screening Level
for Carcinogens
@ TCR = 1E-06
Indoor Air
Screening Level
for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic Risk
Calculated Non-
Carcinogenic
Hazard
Quotient
127-18-4 Tetrachloroethylene 8500 85 4.7E+01 3.5E+01 1.8E-06 4.9E-01
Cumulative: 1.8E-06 4.9E-01
DSCA Soil Gas Risk Calculator - Cumulative Risk for Non-Residential Worker
Version 6, November 2017
DC670003
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non‐volatile chemicals.  Since these chemicals do not pose a vapor intrusion risk, no risk 
values are calculated for these chemicals.