HomeMy WebLinkAboutWS-4643_15046_CA_MRP_20161027Groundwater Monitoring Report
Save More #45
Incident #15046
1424 North Fayetteville Street
Asheboro, Randolph County, North Carolina
ATC Project No. SL1504604
October 27, 2016
TABLE OF CONTENTS
1. SITE IDENTIFICATION ..........................................................................................1
2.0 EXECUTIVE SUMMARY .....................................................................................2
3.0 SITE DESCRIPTION .............................................................................................3
3.1 Site Characterization ................................................................................3
3.2 Site Background .......................................................................................3
4.0 GROUNDWATER CHARACTERIZATION.......................................................4
4.1 Groundwater Levels .................................................................................4
4.2 Groundwater Quality ...............................................................................4
5.0 CONCLUSIONS AND RECOMMENDATIONS .................................................5
TABLES
Table 1 Well Construction and Groundwater Elevation Data
Table 2 Groundwater Analytical Results
Table 3 Historical Groundwater Analytical Results
FIGURES
Figure 1 Site Topographic Map
Figure 2 Site Map
Figure 3 Soil Plume Map
Figure 4 Groundwater Elevation Contour Map
Figure 5 Dissolved Benzene Isoconcentration Contour Map
Figure 6 Dissolved MTBE Isoconcentration Contour Map
APPENDICES
Appendix A Field Notes
Appendix B Laboratory Analytical Results
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
2
2.0 EXECUTIVE SUMMARY
ATC Associates of North Carolina, P.C. (ATC) has completed a Groundwater Monitoring Report
(GMR) for the Save More #45 site. This report documents a groundwater sampling event
conducted at the site on May 24, 2016. The GMR is being performed based on a April 5, 2016 Task
Authorization (TA-4) by the Trust Fund Branch of the Underground Storage Tank (UST) Section,
Division of Waste Management, North Carolina Department of Environmental Quality (NCDEQ).
The work is being performed as part of the State Lead Contract #N14004i between NCDEQ and
ATC.
Save More #45 is located at 1424 North Fayetteville Street in Asheboro, Randolph County, North
Carolina. The site consists of one single-story building that is used as a retail petroleum facility
and convenience store. Nine monitoring wells (MW-1 through MW-8 and VEW-1) are located at
the site. There are no water supply wells within 1,500 feet of the site and there is one surface water
body located 500 feet east of the site. Municipal water is available to the site and site vicinity.
On May 24, 2016, ATC personnel mobilized to the site to collect groundwater samples and measure
groundwater elevations. Groundwater samples were collected from monitoring wells MW-1
through MW-8 and VEW-1. Free product was not detected during the May 2016 sampling event.
Groundwater elevations measured at the site indicate groundwater flows south-southeast across
the site.
Laboratory analytical results of the May 2016 sampling event indicated petroleum hydrocarbon
compounds at concentrations exceeding North Carolina 2L Groundwater Standards (2L Standards)
in monitoring wells MW-1, MW-3, MW-4, MW-7, and VEW-1. In addition, groundwater samples
collected from MW-1 and MW-3 contained petroleum hydrocarbons exceeding the Gross
Contaminant Levels (GCLs). Groundwater exceeding the GCLs appears to be adequately
delineated in the downgradient direction.
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
3
Based on field observations and groundwater analytical results, ATC recommends:
• Conducting an aggressive fluid vapor recover (AFVR) event on monitoring wells MW-1
and MW-3.
• Continue with semiannual sampling of the existing monitoring well network.
3.0 SITE DESCRIPTION
3.1 Site Characterization
The Save More #45 site is located at 1424 North Fayetteville Street in Asheboro, Randolph County,
North Carolina. Currently, one single-story building operating as a retail petroleum facility and
convenience store exists on-site. The current UST system consists of one 14,000-gallon gasoline
UST, one 6,000-gallon gasoline UST, and one 4,000-gallon kerosene UST. The UST system was
installed in March and April 2003 and is still in use. The former UST system at the site consisted of
two 6,000-gallon gasoline USTs and one 8,000-gallon gasoline UST. The former UST system was
installed in May of 1972 and permanently removed in April 2003. Impacted soil was not
excavated during the UST closure. The site is bounded by North Fayetteville Street to the west, a
lot with a vacant retail building to the north, a vacant lot zoned for residential purposes to the east,
and Rainbow Drive to the south. Surrounding properties are characterized by residential and
commercial use. A site topographic map is included as Figure 1 and a site map depicting pertinent
site features is included as Figure 2.
3.2 Site Background
On November 16, 1995, gasoline product was discovered in the pump pit of one UST located
onsite. Between November 16 and 21, 1995, approximately 126 gallons of gasoline and
impacted water were removed from the UST pump pit. The UST pump was subsequently
replaced.
On January 19, 1996, an Initial Response, Abatement Measures, Site Check, and Initial Site
Characterization Report was submitted to the regional office and documented soil assessment
activities. Soil borings B-1 through B-3 were advanced around the UST system. Two of the
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
4
three boring indicated concentrations of volatile fraction total petroleum hydrocarbons (TPH) by
Method 5030 above NCDEQ Action Level.
A Report of Soil Contamination and Phase I Limited Site Assessment (LSA) was submitted on
December 2, 1998. Three borings were advanced for the purpose of soil assessment (B-2, B-3,
and MW-1). The soil samples did not indicate volatile petroleum hydrocarbons (VPH) by the
Massachusetts Department of Environmental Protection (MADEP) or volatile organic
compounds (VOCs) by Method 8260 above Soil-to-Groundwater Maximum Soil Contaminant
Concentrations (MSCCs). The original intent was to install a permanent monitoring well in
boring MW-1; however, groundwater was not observed in the boring so the well was not
installed. A receptor survey indicated there were no water supply wells within 1,500 feet of the
site.
In April 2003, the UST system (product lines, dispensers, two 6,000-gallon gasoline USTs, and
one 8,000-gallon gasoline UST) were replaced due to site renovations. During UST excavation
and removal, soil samples were collected from beneath the dispensers, product lines, and USTs.
Soil analytical results indicated compounds exceeding Soil-to-Groundwater MSCCs. Soil
excavation was not performed following UST removal since there was a previously documented
release at the site. Subsequent to removal, one 14,000-gallon gasoline UST, one 6,000-gallon
gasoline UST, one 4,000-gallon kerosene UST, dispensers and product lines were installed at the
site. A UST Closure Report was submitted on May 12, 2003.
A Phase I/II LSA was submitted to NCDEQ on December 18, 2003. During LSA activities,
monitoring wells MW-1 through MW-6 and VEW-1 were installed and sampled. Based on
laboratory analytical results, groundwater concentrations exceeded GCLs at the site. A receptor
survey indicated there were no water supply wells within 1,500 feet of the site; however, an
intermittent stream was identified within 250 feet of the site.
A Comprehensive Site Assessment was submitted on June 16, 2004. During the CSA, twenty soil
borings were advanced and sampled. Laboratory results indicated seven of the twenty borings were
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
5
impacted above Soil-to-Groundwater MSCCs, but below Industrial/Commercial MSCCs. The soil
contaminant plume is included as Figure 3.
A groundwater sampling event was performed in March 2009. Groundwater laboratory results
indicated impacts exceeding GCLs at the site. Free product was not detected during the sampling
event. In addition, the monitoring report indicated the nearest surface water body was located 500
feet east of the site. A Groundwater Monitoring Report was submitted on July 15, 2009.
A groundwater sampling event was performed in January 2015. Groundwater laboratory results
indicated impacts exceeding GCLs at the site. Free product was detected during the sampling event
in MW-1. A Groundwater Monitoring Report was submitted on April 15, 2015.
On May 14, 2015, ATC supervised the installation of monitoring well MW-7 located on the
downgradient boundary of the site property. The purpose of the monitoring well was to delineate
groundwater impacted above GCLs. ATC sampled the newly installed monitoring well on May 17,
2015. Based on the results of the groundwater monitoring event it appeared that groundwater impact
above GCLs had not been delineated. ATC recommended that an additional monitoring well be
installed downgradient of MW-7. Due to the presence of free product in MW-1 during the January
2015 sampling event, ATC installed an oil absorbent boom in MW-1 which remains in place to the
present day. A Federal/State-Lead Letter Report was submitted July 15, 2015.
On February 15 and February 19, 2016, ATC supervised the installation of monitoring well MW-8
located off site across Rainbow Drive. The purpose of the monitoring well was to delineate
groundwater impacted above GCLs. ATC sampled the newly installed monitoring well on February
23, 2016. Based on the results, no compounds exceeded laboratory detection limits and it appeared
groundwater impact was adequately delineated in the downgradient direction to the southwest. A
Federal/State-Lead Letter Report was submitted April 5, 2016.
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
6
4.0 GROUNDWATER CHARACTERIZATION
4.1 Groundwater Levels
Groundwater level measurements were collected from monitoring wells MW-1 through MW-8 and
VEW-1 on May 24, 2016. In addition, top of casing elevations for monitoring wells MW-7 and
MW-8 were surveyed using MW-3 as a benchmark. Monitoring well construction details as well as
current and historical groundwater elevation data is summarized in Table 1. The oil absorbent
boom was removed from MW-1 prior to gauging and free product was not detected during the
gauging event. Depth to groundwater measurements ranged from 15.57 feet below ground surface
(bgs) in MW-5 to 20.00 feet bgs in VEW-1. A groundwater elevation contour map generated using
the May 2016 groundwater elevation data is included as Figure 4. Based upon the May 2016
gauging event, groundwater flow direction was identified as south-southwest. Field notes from the
May 24, 2016, site visit are included in Appendix A.
4.2 Groundwater Quality
On May 24, 2016, groundwater samples were collected from monitoring wells MW-1 through
MW-8 and VEW-1. Samples were collected in laboratory-approved containers, packed in ice and
delivered under chain-of-custody protocol to Con-test Analytical Laboratory (Con-test) in East
Longmeadow, Massachusetts for analyses. Groundwater samples were analyzed for volatile
organic compounds (VOCs) by Environmental Protection Agency (EPA) Method 6200B.
The laboratory analytical results indicated the presence of petroleum hydrocarbon compounds at
concentrations above 2L Standards in monitoring wells MW-1, MW-3, MW-4, MW-7, and
VEW-1. Compounds detected above 2L Standards include benzene, toluene, ethylbenzene, total
xylenes, methyl tert-butyl ether (MTBE), naphthalene, isopropylbenzene, n-propylbenzene, n-
butylbenzene, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene. Benzene concentrations
exceeded GCLs in monitoring wells MW-1 and MW-3. MTBE also exceeded its respective GCL
in MW-1. Current groundwater analytical data has been summarized in Table 2 and historical
groundwater analytical data is presented in Table 3. Isoconcentration contour maps for benzene
and MTBE are included as Figures 5 and 6, respectively. The laboratory analytical report and
chain-of-custody forms are included in Appendix B.
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
7
Due to the site’s risk classification, the groundwater cleanup standards for the site are to the
GCLs with the absence of free product. Historical analytical results indicate groundwater
impacts above GCLs in monitoring wells MW-1, MW-3, MW-7, and VEW-1. However, the
May 2016 groundwater results show concentrations exceeding GCLs in just MW-1 and MW-3.
As part of ATC’s quality assurance and quality control (QA and QC) measures, a data review of
the laboratory report was conducted. During the review, it was concluded that samples were
received by the laboratory in acceptable condition and properly preserved. The samples were
analyzed within the correct holding times, and the chain of custody was properly completed by
all parties. The laboratory QC report shows an internal blank was analyzed for each method that
was used for the original samples. The laboratory fortified blank (LFB) and laboratory control
sample (LCS) data results were also provided for each analytical method. Refer to the laboratory
report in Appendix B for details regarding QA results for the laboratory samples and any noted
exceptions. ATC concludes that the laboratory results are usable and any exceptions do not
significantly impact the conclusions presented in this report.
5.0 CONCLUSIONS AND RECOMMENDATIONS
On behalf of the Trust Fund Branch of the UST Section, ATC has completed a GMR
documenting a May 24, 2016, monitoring event for the Save More #45 site at 1424 North
Fayetteville Street in Asheboro, Randolph County, North Carolina. Results from the monitoring
event indicate VOC impact in monitoring wells MW-1, MW-3, MW-4, MW-7, and VEW-1
above the 2L Standards. Due to the site’s risk classification, the groundwater cleanup standards
for the site are to the GCLs with the absence of free product. Monitoring wells MW-1 and MW-
3 indicated impact above GCLs. Field observations indicate groundwater flows south-southeast
across the site. The benzene and MTBE plumes for concentrations above GCLs appear
adequately delineated in the downgradient direction. Historical results indicate a decreasing
trend of MTBE in MW-3. Concentrations trends are variable in MW-1 for MTBE and MW-3 for
benzene. There appears to be an increasing trend for benzene in MW-1.
Groundwater Monitoring Report October 27, 2016
Save More #45 (Incident #15046) ATC Project No. SL1504604
8
Based on field observations and groundwater analytical results, ATC recommends conducting an
AFVR event on monitoring wells MW-1 and MW-3 in in an attempt to reduce groundwater
concentrations below the GCLs. If the AFVR event proves effective and is able to recover a
considerable amount of volatile organic compounds, ATC will recommend mobile multi-phase
extraction (MMPE) events for future groundwater recovery activities. Concurrent with the
recovery activities, ATC recommends continued semiannual sampling.
In addition, the current groundwater contaminant plume do not appear to be consistent with
groundwater flow direction. After the next comprehensive sampling event, if groundwater flow
direction and plume migration still appear contradictory, ATC will recommend resurveying
monitoring well MW-1 through MW-6 which were last surveyed in 2003.
TABLES
TABLE 1
WELL CONSTRUCTION AND
GROUNDWATER ELEVATION DATA
SAVE MORE #45
1424 NORTH FAYETTEVILLE STREET
ASHEBORO, NORTH CAROLINA
INCIDENT #15046
11/17/2003 20.45 -- -- 79.55
3/24/2009 23.53 -- -- 76.47
1/20/2015 23.01 22.91 0.10 77.07
5/24/2016 19.25 -- -- 80.75
11/17/2003 18.58 -- -- 81.15
3/24/2009 21.14 -- -- 78.59
1/20/2015 21.32 -- -- 78.41
5/24/2016 16.85 -- -- 82.88
11/17/2003 20.36 -- -- 79.76
3/24/2009 23.21 -- -- 76.91
1/20/2015 22.92 -- -- 77.20
5/24/2016 18.78 -- -- 81.34
11/17/2003 20.50 -- -- 78.49
3/24/2009 23.13 -- -- 75.86
1/20/2015 22.56 -- -- 76.43
5/24/2016 18.90 -- -- 80.09
11/17/2003 18.52 -- -- 80.15
3/24/2009 21.59 -- -- 77.08
1/20/2015 18.91 -- -- 79.76
5/24/2016 15.57 -- -- 83.10
11/17/2003 18.75 -- -- 81.27
3/24/2009 21.23 -- -- 78.79
1/20/2015 21.39 -- -- 78.63
5/24/2016 17.04 -- -- 82.98
NS 5/17/2015 23.45 -- -- NM
100.96 5/24/2016 19.38 -- -- 81.58
NS 2/23/2016 20.30 -- -- NM
101.39 5/24/2016 19.63 -- -- 81.76
11/17/2003 21.19 -- -- 78.68
3/24/2009 24.33 -- -- 75.54
1/20/2015 23.65 -- -- 76.22
5/24/2016 20.00 -- -- 79.87
Notes:
3. NS = Not Surveyed
4. Monitoring Wells MW-7 and MW-8 were surveyed using MW-3 as a benchmark on May 24, 2016.
Well ID Date
Installed
Well
Casing
Depth
Screened
Interval
Depth to
Free Product
(feet)
Free Product
Thickness
(feet)
99.73
Bottom
of Well
25
1. For monitoring wells with free product, groundwater elevation is calculated by the following formula: TOC Elevation - Depth to Water + (0.76*Free Product Thickness)
2. NM = Not Measured
Date
Measured
Depth to
Water
(feet)
Top of Casing
Elevation (feet)
Groundwater
Elevation
(feet)
MW-1 10/3/2003 10 10-25 100.00
2510-251010/3/2003MW-2
MW-3 11/12/2003 8 8-23 23 100.12
98.99205-20511/12/2003MW-4
MW-5 11/12/2003 9 9-24 24 98.67
100.022712-271211/12/2003
85 99.87
3015-3015
MW-6
MW-7 5/14/2015 15 15-30 30
2/19/2016MW-8
VEW-1 11/13-14/03 80 80-85
TABLE 2GROUNDWATER ANALYTICAL RESULTSSAVE MORE #451424 NORTH FAYETTEVILLE STREETASHEBORO, NORTH CAROLINAINCIDENT #15046 Well ID Sample DateBenzeneTolueneEthylbenzeneTotal XylenesMTBENaphthaleneIsopropylbenzenen-Butylbenzenesec-Butylbenzenen-Propylbenzene1,4-DichlorobenzeneChlorobenzenep-Isopropyltoluene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneMW-1 5/24/201620,000 3,800 2,700 8,400 170,000 930 93 84<13290<15 <16 <152,900 750MW-2 5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.12 <0.12 <0.15 <0.13 <0.13 <0.15 <0.16 <0.15 <0.18 <0.13MW-3 5/24/20169,500 2,800 2,100 5,450 8,900 450 72J<30 <26180<30 <32 <30970250MW-4 5/24/20164.00.47J 4.4 1.39 <0.0908.54.6 2.2 1.3 7.2 1.3 1.3 0.42J 1.7 1.1MW-5 5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.12 <0.12 <0.15 <0.13 <0.13 <0.15 <0.16 <0.15 <0.18 <0.13MW-6 5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.12 <0.12 <0.15 <0.13 <0.13 <0.15 <0.16 <0.15 <0.18 <0.13MW-7 5/24/20161,900 2,8005102,470 6,600 130<12 23J <13 65 <15 <16 <15540170MW-8 5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.12 <0.12 <0.15 <0.13 <0.13 <0.15 <0.16 <0.15 <0.18 <0.13VEW-1 5/24/2016 <12 21J <13 <2513,000<12 <12 <15 <13 <13 <15 <16 <15 <18 <131 600 600 500 20 6 70 70 70 70 6 50 25 400 4005,000 260,000 84,500 85,500 20,000 6,000 25,000 6,900 8,500 30,000 6,000 50,000 11,700 28,500 25,000Notes:1. MTBE = Methyl Tertiary Butyl Ether.2. Concentrations in shaded cells exceed GCLs.3. "<" or ND = Not detected at or above the laboratory method dectection limit.4. Concentrations are reported in micrograms per liter (ug/l) = parts per billion (ppb).5. Concentrations in bold equal or exceed the corresponding NCDEQ Groundwater Quality 2L Standard (2L Standard).6. GCL = Gross Contamination Level.7. J = Indicates constituent was detected above laboratory detection limit but below laboratory reporting limit2L Standard (ug/l)GCL (ug/l)
TABLE 3HISTORICAL GROUNDWATER ANALYTICAL RESULTSSAVE MORE #451424 NORTH FAYETTEVILLE STREETASHEBORO, NORTH CAROLINAINCIDENT #15046 3030C10/3/20039,400 970 1,100 1,640 140,000 670 60061110 160 540160 -- 7.75,500 11,000 1,2003/22/200912,400 1,010 1,430 2,780 226,000--490BQL BQL BQL1,000280 --30.1 286,000 9,550 4,6601/20/2015NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP NS/FP5/24/201620,000 3,800 2,700 8,400 170,000<18930 93 84 290 2,900 750<17NANANANA10/3/2003 BQL BQL BQL BQL BQL ND BQL BQL BQL BQL BQL BQL -- BQL BQL BQL BQL3/22/2009 BQL BQL BQL BQL BQL -- BQL BQL BQL BQL BQL BQL -- BQL BQL BQL BQL1/20/2015 <0.079 <0.09 <0.092 <0.18 <0.09 <0.18 <0.12 <0.11 <0.054 <0.094 <0.18 <0.01 0.17J NA NA NA NA5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.18 <0.12 <0.12 <0.15 <0.13 <0.18 <0.13 <0.17 NA NA NA NA11/17/20033,900 1,300BQL590 62,000ND BQL BQL BQL BQL BQL BQL -- BQL5,100 2,700 1,1003/22/20093,960 1,030BQL910 35,000-- BQL BQL BQL BQL BQL BQL -- 550,300 4,390 1,6501/20/201514,000 1,400 2,600 5,350 19,000 160 760 74<5.4200 1,000 230 19JNA NA NA NA5/24/20169,500 2,800 2,100 5,450 8,900<36450 72J<30180 970250<34NANANANA11/17/20033637 4.1 82 BQL ND9.6BQL BQL 1 22 7.6 -- 9.1 290 210 1903/22/200918330.6 28.5 146 BQL --72.211.3 4.8 21 134 36.6 --33.3 1,650 811 5351/20/20157.40.54 2.3 1.75J <0.09 <0.18133.7 <0.054 4.4 1.6 0.71 <0.08 NA NA NA NA5/24/20164.00.47J 4.4 1.39 <0.090 <0.188.54.6 2.2 7.2 1.7 1.1 <0.17 NA NA NA NA11/17/20039.3BQL BQL BQL 0.81 ND 4 0.83 BQL 1.2 BQL BQL -- BQL BQL BQL BQL3/22/2009 BQL BQL BQL BQL BQL -- BQL BQL BQL BQL BQL BQL -- BQL BQL BQL BQL1/20/2015 <0.079 <0.09 <0.092 <0.18 0.62 <0.18 <0.12 <0.11 <0.054 <0.094 <0.18 <0.01 0.15J NA NA NA NA5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.18 <0.12 <0.12 <0.15 <0.13 <0.18 <0.13 <0.17 NA NA NA NA11/17/2003 BQL BQL BQL BQL 9.2 ND BQL BQL BQL BQL BQL BQL -- BQL BQL BQL BQL3/22/2009 BQL BQL BQL BQL BQL -- BQL BQL BQL BQL BQL BQL -- BQL BQL BQL BQL1/20/2015 <0.079 <0.09 <0.092 <0.18 0.57 <0.18 <0.12 <0.11 <0.054 <0.094 <0.18 <0.01 0.21J NA NA NA NA5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.18 <0.12 <0.12 <0.15 <0.13 <0.18 <0.13 <0.17 NA NA NA NA5/17/201522,000 24,000 2,400 11,700 80,000 640<24 62J 48J190 2,200 460<16NANANANA5/24/20161,900 2,8005102,470 6,600<18130<12 23J 65540170<17NANANANA2/23/2016 <0.12 <0.17 <0.13 <0.25 <0.09 <0.18 <0.12 <0.12 <0.15 <0.13 <0.18 <0.13 <0.17 NA NA NA NA5/24/2016 <0.12 <0.17 <0.13 <0.25 <0.090 <0.18 <0.12 <0.12 <0.15 <0.13 <0.18 <0.13 <0.17 NA NA NA NA11/17/2003362.8 BQL BQL26,000 160BQL BQL BQL BQL BQL BQL -- BQL2,600BQL BQL3/22/2009 BQL BQL BQL BQL23,200-- BQL BQL BQL BQL BQL BQL -- BQL15,100BQL BQL1/20/2015 <2 <2.2 <2.3 <4.53,90013 <3 <2.8 <1.4 <2.4 <2.4 <2.53.2JNA NA NA NA5/24/2016 <12 21J <13 <2513,000<18 <12 <12 <15 <13 <18 <13 <17 NA NA NA NA1 600 600 500 20 70 6 707070 4004000.7 15 400 700 2005,000 260,000 84,500 85,500 20,000 70,000 6,000 25,0006,90030,000 28,50025,000700 15,000 NE NE NENotes:1. MTBE = Methyl Tertiary Butyl Ether2. BQL = Below Quantitation Limit3. ND = Not Detected4. < = Not detected at or above the laboratory method dectection limit.5. GCL = Gross Contamination Level6. NE = Not established7. J = Indicates constituent was detected above laboratory detection limit but below laboratory reporting limit8. Concentrations are reported in ug/L [micrograms per liter = parts per billion (ppb)].9. Concentrations in bold equal or exceed the corresponding NCDENR Groundwater Quality 2L Standard (2L Standard).10. -- = Not reported in historical tables11. NA = Not AnalyzedMADEP VPH1,2,4-TrimethylbenzeneTotal XylenesWELL IDC9-C-10 AromaticsNaphthaleneIsopropylbenzenen-PropylbenzeneC9-C12 Aliphatics6200BGCL (ug/l)BenzeneTolueneTotal LeadC5-C8 AliphaticsMTBETetrachloroethyleneEthylbenzeneMW-6Date CollectedAnalytical MethodIsopropyl Ether2L Standard (ug/l)MW-7MW-8VEW-1MW-5n-Butylbenzene1,3,5-TrimethylbenzeneMW-1MW-2MW-3MW-4
FIGURES
.
2725 E. Millbrook Road, Ste 121
Raleigh, NC 27604
(919) 871-0999
PROJECT NO: SL1504604
DATE: 3/2016 REVIEWED BY: GA
Save More #45– Incident #15046
1424 North Fayetteville Street
Asheboro, Randolph County, North Carolina
SOURCE: MyTopoMap.com
SCALE: 1” = 825’
FIGURE 1: SITE TOPOGRAPHIC MAP
SITE
N
CAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
CAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
CAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
CAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
CAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
APPENDIX A
FIELD NOTES
APPENDIX B
LABORATORY ANALYTICAL RESULTS
Page 1 of 40
Table of Contents
Table of Contents
Sample Summary 3
Hits Only Report 4
Case Narrative 7
Sample Results 8
16E1222-01 8
16E1222-02 10
16E1222-03 12
16E1222-04 14
16E1222-05 16
16E1222-06 18
16E1222-07 20
16E1222-08 22
16E1222-09 24
Sample Preparation Information 26
QC Data 27
Volatile Organic Compounds by GC/MS 27
B150307 27
B150430 31
Flag/Qualifier Summary 35
Certifications 36
Chain of Custody/Sample Receipt 38
Page 2 of 40
Table of Contents
Page 3 of 40
Table of Contents
Page 4 of 40
Table of Contents
Page 5 of 40
Table of Contents
Page 6 of 40
Table of Contents
Page 7 of 40
Table of Contents
Page 8 of 40
Table of Contents
Page 9 of 40
Table of Contents
Page 10 of 40
Table of Contents
Page 11 of 40
Table of Contents
Page 12 of 40
Table of Contents
Page 13 of 40
Table of Contents
Page 14 of 40
Table of Contents
Page 15 of 40
Table of Contents
Page 16 of 40
Table of Contents
Page 17 of 40
Table of Contents
Page 18 of 40
Table of Contents
Page 19 of 40
Table of Contents
Page 20 of 40
Table of Contents
Page 21 of 40
Table of Contents
Page 22 of 40
Table of Contents
Page 23 of 40
Table of Contents
Page 24 of 40
Table of Contents
Page 25 of 40
Table of Contents
Page 26 of 40
Table of Contents
Page 27 of 40
Table of Contents
Page 28 of 40
Table of Contents
Page 29 of 40
Table of Contents
Page 30 of 40
Table of Contents
Page 31 of 40
Table of Contents
Page 32 of 40
Table of Contents
Page 33 of 40
Table of Contents
Page 34 of 40
Table of Contents
Page 35 of 40
Table of Contents
Page 36 of 40
Table of Contents
Page 37 of 40
Table of Contents
Page 38 of 40
Table of Contents
Page 39 of 40
Table of Contents
Page 40 of 40
Table of Contents