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GROUNDWATER MONITORING REPORT
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BOULEVARD SW.
LENOIR, CALDWELL COUNTY, NORTH CAROLINA
NCDENR INCIDENT NUMBER: 6505
NCDENR CONTRACT NUMBER: N14007i-C
ECS PROJECT 09.25119
PREPARED FOR:
NCDENR, UST SECTION
RALEIGH, NORTH CAROLINA
March 30, 2015
i
SITE INFORMATION
Site Name: Former E-Z Way Auto Sales
Site Address: 1036 Morganton Boulevard SW.
Lenoir, North Carolina 28645
Facility ID Number: Unknown
NCDENR Incident Number: 6505
Site Risk Ranking: Intermediate (Assigned)
Land Use Category: Commercial
Latitude/Longitude: 36.9040269 N /79.538430 W
Responsible Party: Unknown
Current Property Owner: 3rd Wimbish Family Prop. LLC
858 13th Street Pl. SW.
Hickory, North Carolina 28602
Primary Contact: Ms. Sharon Ghiold
NCDENR, Division of Waste Management, UST Section
1637 Mail Service Center
Raleigh, North Carolina 27699-1637
Primary Consultant: ECS Carolinas, LLP
4811 Koger Boulevard
Greensboro, North Carolina 27407
(336) 856-7150
Laboratory: Research and Analytical Laboratories, Inc.
Short Street
Kernersville, North Carolina 28224-0403
(336) 996-2841
Laboratory Certification No. 35
Release Information:
Two 8,000-gallon and two 4,000-gallon underground storage tanks (USTs) were closed and
removed from the site in 1990. A release was discovered after the USTs were removed and
soil samples were analyzed. Samples obtained from the UST removal contained total
petroleum hydrocarbons-gasoline range organics (TPH-GRO) at 63.5 milligrams per kilogram
(mg/kg).
Free phase Product was measure in monitoring well MW-1 in September 2007 and April 2010.
A 96-hour Mobile Multiphase Extraction (MMPE) Event was conducted in May of 2011 on
iii
TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY ....................................................................................................... 1
2.0 PROJECT INFORMATION .................................................................................................... 2
3.0 GROUNDWATER ASSESSMENT ......................................................................................... 3
3.1 Static Water Levels for Groundwater Flow Direction .................................................. 3
3.2 Groundwater Chemistry .............................................................................................. 3
3.3 Monitoring Well Sampling ........................................................................................... 3
4.0 RESULTS ............................................................................................................................... 3
4.1 Groundwater Flow Direction ........................................................................................ 3
4.2 Groundwater Chemistry .............................................................................................. 3
4.3 Monitoring Well Sampling Results .............................................................................. 4
5.0 CONCLUSIONS ..................................................................................................................... 4
6.0 RECOMMENDATIONS .......................................................................................................... 4
FIGURES
Figure 1 Site Location Map
Figure 2 Aerial Site Map
Figure 3 Monitoring Well Location Map
Figure 4 Groundwater Elevation Map
Figure 5 Isoconcentration Map of Benzene
Figure 6 Isoconcentration Map of Naphthalene
Figure 7 Isoconcentration Map of Isopropylbenzene
Figure 8 Isoconcentration Map of n-Propylbenzene
TABLES
Table 1 Monitoring Well Information and Groundwater Elevation Data
Table 2 Geochemical Measurements
Table 3 Summary of Groundwater Analytical Results (Monitoring Wells)
APPENDIX
Appendix A Site Photographs
Appendix B Field Data Sheets
Appendix C Laboratory Data Sheets and Chain of Custody Record
Appendix D North Carolina General Warranty Deed
Groundwater Monitoring Report
Task Authorization Request No. 1 – Former E-Z Way Auto Sales
Lenoir, Caldwell County, North Carolina
NCDENR Incident No.: TF-6505
ECS Project 09.25119
March 30, 2015
1
1.0 EXECUTIVE SUMMARY
As part of Task Authorization (TA) #1, NCDENR Contract # N14007i-C, ECS was contracted to
sample four groundwater monitoring wells (MW-1, MW-2, MW-3, MW-4) and prepare a State
Trust/Federal Trust Fund (STF/FTF) monitoring report in regards to NCDENR Incident No. 6505
– Former E-Z Way Auto Sales.
A release was discovered after two 8,000-gallon and two 4,000-gallon underground storage
tanks (USTs) were removed by closure June 1990. Analysis of samples collected following the
UST removal detected Total Petroleum Hydrocarbons as gasoline (TPH-GRO) above the State
Action Level.
In January 1991, monitoring well MW-1 was installed and sampled for volatile organic
compounds. The analysis detected hydrocarbons above their respective North Carolina 2L
Groundwater Quality Standards (NC2LGWQS).
In Septembers 2007, three soil borings were drilled and soil samples were collected around the
source area. Analysis of the samples detected hydrocarbons above North Carolina Residential
Maximum Soil Contaminant Concentrations (MSCCs) in soil boring SB-2. No hydrocarbons
were detected above commercial/industrial MSCCs. Monitoring wells MW-2, MW-3, and MW-4
were installed in the locations of the soil borings and sampled. Analysis of the samples
collected from MW-2 and MW-3 detected benzene at concentrations exceeding its NC2LGWQS
by a factor of ten. Free phase product was measured in monitoring well MW-1.
A receptor survey conducted in December 2007 did not locate water-supply wells within a 1,000
foot radius of the source area. Lower Creek is located approximately 300 feet southeast of the
release area.
A 96-hour mobile multiphase extraction (MMPE) event was conducted in May of 2011 in
monitoring wells MW-1 and MW-3. The MMPE removed approximately ninety-five gallons of
volatile organic compounds. After the MMPE event, monitoring wells MW-1 through MW-4 were
sampled and Biosocks were installed in monitoring well MW-2 and MW-3. No free product has
been detected in monitoring well MW-1 since the MMPE event.
On July 23, 2013, Crawford Environmental Services (CES) collected samples from
monitoring wells MW-1, MW-2, MW-3 and MW-4. The analysis detected various
hydrocarbons above NC2LGWQS in MW-1, MW-2, and MW-3. Biosoks were placed in
monitoring wells MW-1, MW-2 and MW-3 upon completion of sampling activities.
In March 2015, ECS personnel collected samples from four monitoring wells (MW-1, MW-2, MW-
3, and MW-4). Laboratory analysis of groundwater samples collected from the monitoring wells
detected various petroleum related hydrocarbons in MW-1, MW-2, and MW-3 a concentration
above their respective NC2LGWQS. No compounds were detected above their Gross
Contamination Levels (GCLs)
Based on the information collected in this investigation and those performed by others, the
concentrations of petroleum related hydrocarbons in the monitoring wells have declined since
they were last sampled in 2013. It appears that the Biosocks have assisted in the reduction of
Groundwater Monitoring Report
Task Authorization Request No. 1 – Former E-Z Way Auto Sales
Lenoir, Caldwell County, North Carolina
NCDENR Incident No.: TF-6505
ECS Project 09.25119
March 30, 2015
2
VOCs in MW-1, MW-2, and MW-3. No free phase product has been detected in MW-1 since 2010
and no water-supply wells were located within 1,000 feet of the release. The closest surface water
receptor is Lower Creek 300 feet south of the site. Based on the information collected by others
over the last eight years and the current groundwater quality, ECS recommends that the incident be
closed following the submittal of a Notice of Residual Petroleum restricting groundwater use on the
site.
2.0 PROJECT INFORMATION
The subject site is Former E-Z Way Auto Sales located at 1036 Morganton Boulevard SW. in
Lenoir, Caldwell County, North Carolina (Figures 1 and 2). Based on information provided to
ECS, two 8,000-gallon and two 4,000-gallon underground storage tanks (USTs) were removed
by closure June 1990. Soil contamination was discovered during the removal of the UST
system. Groundwater was encountered at 6 to 8 feet below land surface (bls). Photographs
of the site are included in Appendix A.
In August 1991, monitoring well MW-1 was installed. Analysis of the groundwater sample
detected benzene, ethylbenzene, xylene, and isopropyl ether at concentrations exceeding their
North Carolina 2L groundwater standards (NC2LGWQS).
In Septembers 2007, Hart & Hickman performed a Phase I Limited Site Assessment (LSA).
Three soil borings were drilled around the source area. Six petroleum related hydrocarbons
were detected in the samples collected from soil borings SB-2 at concentrations above North
Carolina Residential Maximum Soil Contaminant Concentrations (MSCCs). No hydrocarbons
were detected above commercial/industrial MSCCs. Monitoring wells MW-2, MW-3, and MW-4
were installed in the locations of the soil borings and sampled. Analysis of the samples
collected from MW-2 and MW-3 detected benzene at concentrations exceeding its NC2LGWQS
by a factor of ten. Three additional hydrocarbons were detected in samples from MW-2 and
MW-3 above the NC2LGWQS. Free phase product was measured in monitoring well MW-1. A
receptor survey conducted in December 2007 did not locate water-supply wells within a 1,000
foot radius of the source area. Lower Creek is located approximately 300 feet southeast of the
release area.
In April 28, 2010, Terraine Environmental (Terraine) sampled the monitoring wells. Free
product was measured in MW-1. Several hydrocarbons were detected above NC2LGWQS in
MW-2 and MW-3. Well Booms were placed in MW-2 and MW-3 to promote biodegrading of
petroleum.
Terraine conducted a Multi-Mobile Phase (MMPE) event at the site between May 9 and 13,
2011. Approximately 5,010 gallons of fluid was recovered with approximately 95 gallons of
volatile organic compounds recovered. Subsequent sampling conducted on May 26, 2011 did
not detect free product in MW-1 and reduced contaminant levels in MW-2 and MW-3.
On July 23, 2013, Crawford Environmental Services (CES) collected samples from
monitoring wells MW-1, MW-2, MW-3 and MW-4. The analysis detected benzene, 1,2,4-
trimethylbenzene, isopropylbenzene, methylene chloride, naphthalene, n-butylbenzene,
and n-propylbenzene above their NC2LGWQS in MW-1, benzene above its NC2LGWQS
Groundwater Monitoring Report
Task Authorization Request No. 1 – Former E-Z Way Auto Sales
Lenoir, Caldwell County, North Carolina
NCDENR Incident No.: TF-6505
ECS Project 09.25119
March 30, 2015
3
in MW-2, and benzene, isopropylbenzene, methylene chloride, naphthalene, xylenes and n-
propylbenzene) above their NC2LGWQS in MW-3. Biosoks were placed in monitoring
wells MW-1, MW-2 and MW-3 upon completion of sampling activities.
3.0 GROUNDWATER ASSESSMENT
3.1 Static Water Levels for Groundwater Flow Direction
On March 4, 2015, ECS measured the static water level (SWL) in four monitoring wells using a
decontaminated electronic water level meter. Information regarding the construction of the
monitoring wells and depth to groundwater is summarized on Table 1.
3.2 Groundwater Chemistry
Prior to collecting the groundwater samples from the monitoring wells, geochemical parameters
(temperature, pH, dissolved oxygen, and conductivity) were measured using an YSI Model 560
meter. The turbidity was observed during the sampling and recorded on the Groundwater
Sampling Data Sheets (Appendix B).
3.3 Monitoring Well Sampling
On March 4, 2015, ECS personnel collected samples from four monitoring wells (MW-1, MW-2,
MW-3, and MW-4). The locations of the wells are shown on Figure 3. Prior to sampling, the
wells were purged using a new disposable polyethylene bailer and new length of nylon cord. The
wells were developed/purged by evacuating a minimum of 3 well volumes using the bailer and
cord. The wells were developed/purged to remove sand, silt and other fine sediments and to
promote communication between the surrounding formation and the sand pack surrounding the
well’s screened interval. After purging was completed, the sampler wearing a new pair of
disposable nitrile gloves for each sampling point poured the groundwater sample from the bailer
into laboratory prepared containers. Each container was labeled and placed in a cooler
containing ice to maintain the samples at approximately 4 Celsius. The sample containers
were then delivered to Research & Analytical Laboratories, Inc. (R&A) in Kernersville, North
Carolina to be analyzed for volatile organic compounds (VOCs) using Standard Method 6200B.
A Chain of Custody Record was maintained and is included in the Appendix C.
4.0 RESULTS
4.1 Groundwater Flow Direction
Based on the depth to water table measurements collected on March 4, 3015, the groundwater
gradient is to the southwest across the site (Figure 4).
4.2 Groundwater Chemistry
Based on the geochemical data, the average groundwater temperature was 17.79° C and the
average conductivity was 0.0.293 mS/cm. The pH ranged between 5.57 to 6.01 and the
Groundwater Monitoring Report
Task Authorization Request No. 1 – Former E-Z Way Auto Sales
Lenoir, Caldwell County, North Carolina
NCDENR Incident No.: TF-6505
ECS Project 09.25119
March 30, 2015
4
dissolved oxygen (DO) ranged between 1.53 mg/l to 2.85 mg/l. The geochemical measurements
are summarized on Table 2.
4.3 Monitoring Well Sampling Results
Laboratory analysis detected benzene, isopropylbenzene, naphthalene, and n-propylbenzene
above their NC2LGWQS in MW-1; and benzene and naphthalene above their NC2LGWQS in
MW-3. Various other hydrocarbons were detected in the wells but below their NC2LGWQS.
Laboratory of analysis of the sample collected from monitoring well MW-2 detected IPE at a
concentration above the laboratory quantitative limit but not above its respective NC2LGWQS.
Laboratory analysis of the groundwater sample collected from MW-4 did not detect compounds
above the laboratory method detection limits. Concentrations of benzene in monitoring well MW-1
and MW-3 was above the North Carolina 2B Surface Water Standard (2B Standard). A summary
of the current and historical groundwater analytical results are included in Table 3. Isoconcentration
maps of the hydrocarbons detected above NC2LGWQS are shown on Figures 5 through 8. The
laboratory data sheets are included in the Appendix C.
5.0 CONCLUSIONS
Based on the results of the groundwater assessments, ECS concludes the following:
Based on the information collected in this investigation and those performed by others, the
concentrations of petroleum related hydrocarbons in the monitoring wells have declined since
they were last sampled in 2013. It appears that the Biosocks have assisted in the reduction of
VOCs in MW-1, MW-2, and MW-3. Concentrations of benzene were detected above the 2B
Human Health standards in MW-1 and MW-3; however, the concentrations of benzene were not
above the 2B Standard by a factor of 10. No free product has been detected in MW-1 since 2010;
however the water table has been located above the top of the screen since April 2010. However,
based on the concentration of total BTEX since May 2011, it is ECS’s opinion that no free product is
present in measurable amounts. No water-supply wells were located within 1,000 feet of the
release. The closest surface water receptor is Lower Creek 300 feet south of the site.
6.0 RECOMMENDATIONS
Based on the information collected by others over the last eight years and the current groundwater
quality, ECS recommends that the risk ranking be lowered from intermediate to low risk. ECS also
recommends that the incident be closed, following submittal of a Notice of Residual Petroleum
restricting the use of groundwater on the site and the site for residential use. The existing
monitoring wells should be abandoned by a North Carolina licensed well driller.
FIGURES
SOURCE:
USGS TOPOGRAPHIC MAP
LENOIR NC QUADRANGLE
DATE 1993
FIGURE 1
SITE LOCATION MAP
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SITE
APPROXIMATE SITE BOUNDARY
SCALE (IN FEET)
2,000 1,000 0 2,000
SOURCE:
CALDWELL COUNTY GIS DEPARTMENT
AERIAL PHOTOGRAPH, DATED 2010
FIGURE 2
AERIAL SITE MAP
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
35 17.5 0 35
APPROXIMATE SITE BOUNDARY
SOURCE:
CALDWELL COUNTY GIS DEPARTMENT
AERIAL PHOTOGRAPH, DATED 2010
FIGURE 3
MONITORING WELL LOCATION MAP
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
MW-3
MW-1
SCALE (IN FEET)
35 17.5 0 35
MW-2
APPROXIMATE SITE BOUNDARY
MONITORING WELL
MW-4
SOURCE:
ALAMANCE COUNTY GIS DEPARTMENT
FIGURE 4
GROUNDWATER ELEVATION MAP
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
80 40 0 80
MONITORING WELL
APPROXIMATE PROPERTY LINE
GROUNDWATER ELEVATION
GROUNDWATER FLOW DIRECTION
LEGEND
MW-4
90.72 MW-2
91.96MW-1
90.30 MW-3
90.38
90
92
SOURCE:
ALAMANCE COUNTY GIS DEPARTMENT
FIGURE 5
ISOCONCENTRATION MAP OF BENZENE
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
80 40 0 80
MW-4
(BQL)MW-2
(BQL)
MW-1
(91.4)
MW-3
(66.6)
MONITORING WELL
APPROXIMATE PROPERTY LINE
ISOCONCENTRAION LINE
LEGEND
85
BQL
SOURCE:
ALAMANCE COUNTY GIS DEPARTMENT
FIGURE 6
ISOCONCENTRATION MAP OF
NAPHTHALENE
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
80 40 0 80
MW-4
(BQL)
MW-2
(BQL)
MW-1
(752)MW-3
(61.3)
MONITORING WELL
APPROXIMATE PROPERTY LINE
ISOCONCENTRAION LINE
LEGEND
BQL
700
(BQL)
SOURCE:
ALAMANCE COUNTY GIS DEPARTMENT
FIGURE 7
ISOCONCENTRATION MAP OF
ISOPROPYLBENZENE
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
80 40 0 80
MW-4
(BQL)
MW-2
(BQL)
MW-1
(145)MW-3
(BQL)
MONITORING WELL
APPROXIMATE PROPERTY LINE
ISOCONCENTRAION LINE
LEGEND
BQL
100
SOURCE:
ALAMANCE COUNTY GIS DEPARTMENT
FIGURE 8
ISOCONCENTRATION MAP OF
n-PROPYLBENZENE
FORMER E-Z WAY AUTO SALES
1036 MORGANTON BLVD. SW
LENOIR, CALDWELL COUNTY, NORTH
CAROLINA
NCDENR INCIDENT NO. 6505
ECS PROJECT NO. 09-25119
SCALE (IN FEET)
80 40 0 80
MW-4
(BQL)
MW-2
(BQL)
MW-1
(355)MW-3
(BQL)
MONITORING WELL
APPROXIMATE PROPERTY LINE
ISOCONCENTRAION LINE
LEGEND
BQL
300
TABLES
Former EZ Way Auto Sales
Lenoir, Caldwell County, NC
NCDENR Incident # 6505
ECS Project 09.25119
Table 1: Monitoring Well Groundwater Elevation Data
Monitoring
Well ID#
Total Well
Depth (ft.)
Top of Casing
Elevation
Screen Interval
(ft.)
Date
Measured
Depth to Water
(ft.)
Depth to Free
Product (ft.)
Free Product
Thickness (ft.)
Groundwater
Elevation
09/24/07 11.65 11.45 0.20 88.52
04/28/10 8.01 7.75 0.26 92.21
07/23/13 8.10 ND ND 91.90
03/04/15 9.70 ND ND 90.30
09/24/07 11.64 ND ND 88.82
04/28/10 8.60 ND ND 91.86
07/23/13 8.41 ND ND 92.05
03/04/15 8.50 ND ND 91.96
09/24/07 11.27 ND ND 88.91
04/28/10 7.68 ND ND 92.50
07/23/13 8.29 ND ND 91.89
03/04/15 9.80 ND ND 90.38
09/24/07 11.62 ND ND 88.40
04/28/10 7.84 ND ND 92.18
07/23/13 7.99 ND ND 92.03
03/04/15 9.30 ND ND 90.72
Note:
ND= Not Detected
10 - 20100.00
100.46
100.18
19 100.02 9 - 19
6 - 16
8 - 18
MW-1
MW-2
MW-3
MW-4
16
20
18
Former EZ Way Auto Sales
Lenoir, Caldwell County, NC
NCDENR Incident# 6505
ECS Project 09.25119
TABLE 2: GEOCHEMICAL MEASUREMENTS
SAMPLE ID MW-1 MW-2 MW-3 MW-4
Date Sampled
pH 6 5.65 6.01 5.57
Temperature (oC) 18.35 17.81 17.75 17.25
Conductivity (mS/cm) 0.353 0.25 0.481 0.09
Dissolved O2 (mg/l) 1.59 1.53 2.85 2.11
Turbidity (Observed) T T ST VT
NOTES:
mS/cm = milliseimens per centimeter
mV = millivolts
°C = degress Celsius
NT= Not Turbid
VT= Very Turbid
ST= Slightly Turbid
3/4/2015
Former EZ Way Auto SalesLenoir, Caldwell County, NCNCDENR Incident# 6505ECS Project 09.25119 TABLE 3: SUMMARY OF GROUNDWATER ANALYTICAL RESULTS (MONITORING WELLS)Sample IdentificationSample Date 01/08/91 09/24/07 04/28/10 05/26/11 07/23/1303/04/15 09/24/07 04/28/10 05/26/11 07/23/13 03/04/15 09/24/07 04/28/10 05/26/11 07/23/13 03/04/15 09/24/07 04/28/10 05/26/11 07/23/13 03/04/15Method 6200BBenzene2,452NS-FP NS-FP140 92.5 91.4 12 230 1.9 12<0.565 3,000 1,500 1,300 66.6ND ND ND ND <0.5 1 5,000 51Toluene NA NS-FP NS-FP 27 72.9 19.2 2.8 26 1.1 1.3 <0.5 32014,000320 23.7 3.03 ND ND ND ND <0.5 600 260,000 NEEthylbenzene1,576NS-FP NS-FP 210 ND 23 8.9 18 ND 0.29J <0.5 442,600 720 5866.41 ND ND ND ND <0.5 600 84,500 NETotal Xylenes2,684NS-FP NS-FP 198 153.6 121 45.6 35 2.9 1.1J <1 19714,600 2,050 1,4526.81 ND ND ND ND <0.5 500 85,500 NEMethyl Tertbutyl Ether NA NS-FP NS-FP 0.28J ND <0.5 ND ND 0.13J ND <0.5 0.57 ND 1.6J 1.6J <0.5 ND ND ND ND <0.5 20 20,000 NEIsopropyl Ether218NS-FP NS-FP 11 ND 15 32 31 14 5.2 4.02120ND 42 46.9 21.4 ND ND ND ND <0.5 70 70,000 NEEDB NA NS-FP NS-FP ND ND <0.5 NA ND ND ND <0.5 NA ND ND ND <0.5 NA NDND ND <0.5 0.02 50 NE1,2-Dichloroethane NA NS-FP NS-FP3ND <0.58ND ND ND <0.5 ND ND32ND <0.5 ND ND ND ND <0.5 0.4 400 NE1,2-Dichloropropane NA NS-FP NS-FP 1.8 ND <0.5 ND ND ND ND <0.5 ND ND ND ND <0.5 ND ND ND ND <0.5 0.6 600 NENaphthalene NA NS-FP NS-FP780 473 752 56 211.8 3.7 <0.515 570 190 353 61.33.5 ND ND ND <0.5 6 6,000 NEn-butylbenzene NA NS-FP NS-FP 9110439.2 12 4.7 0.78 0.71 <0.5 1.6 ND ND 20.1 3.76 1.4 ND ND ND <0.5 706,900 NEsec-butylbenzene NA NS-FP NS-FP 29 41.9 <0.5 4.4 5.9 1.3 1.8 <0.5 1.8 14.9 7.3 14.5 <0.5 1.2 ND 0.32J ND <0.5 70 8,500 NEIsopropylbenzene NA NS-FP NS-FP160 117 1457.8 64 15 7.5 <0.5 131406214722.9 0.65 ND ND ND <0.5 70 25,000 NEtert-butylbenzene NA NS-FP NS-FP ND ND <0.5 ND ND ND 0.26J <0.5 ND ND ND ND <0.5 ND ND ND ND <0.5 25 NL NEp-Isopropyltoluene NA NS-FP NS-FP 9.4 ND <0.5 3.6 ND ND ND <0.5 0.68 ND 7.2 ND <0.5 0.74 ND ND ND <0.5 25 11,700 NEMethylene Chloride NA NS-FP NS-FP ND57.6<0.5 ND ND ND ND <0.5 ND ND ND11.3<0.5 ND ND ND ND <0.5 5 5,000 NEn-propylbenzene NA NS-FP NS-FP380 337 355248711 1.5 <0.5 21360 130 30949.4 1.8 ND ND ND <0.5 70 30,000 NE1,2,4-Trimethylbenzene NA NS-FP NS-FP620 509344 100 1.7 ND 2.6J <0.5 311,900 420365 2.95 ND ND ND ND <0.5 400 28,500 NE1,3,5-Trimethylbenzene NA NS-FP NS-FP 130 123 73.3 32 ND ND ND <0.5 15490100 65.3 <0.5 ND ND ND ND <0.5 400 25,000 NEMethod MADEP VPHC5-C8 Aliphatics ND NS-FP NS-FP NA NA NA510NA NA NA NA1,500NA NA NA NA ND NA NA NA NA 400 NE NEC9-C18 Aliphatics ND NS-FP NS-FP NA NA NA870NA NA NA NA 540 NA NA NA NA 120 NA NA NA NA 700 NE NEC19-C36 Aliphatics ND NS-FP NS-FP NA NA NA ND NA NA NA NA ND NA NA NA NA ND NA NA NA NA 200 NE NEC9-C22 Aromatcis ND NS-FP NS-FP NA NA NA620NA NA NA NA 23 NA NA NA NA ND NA NA NA NA 200 NE NENotes:NC2LGWQS = North Carolina 2L Groundwater Quality Standard GCL = Gross Contaminant Level 2B Standards = 15 A NCAC 2B Human Health StandardsND = Not DetectedNS = Not SampledNE = No Standard EstablishedNA = Not Analyzed for This Compoundµg/l = micrograms per liter = ppb (parts per billion)J-Value = Estimated value between laboratory reporting limit and method detection limit Bold = Concentration Exceeds NC2LGWQSBOLD UNDERLINE=Concentration Exceeds GCL2B Standards (HH)GCLMW-1MW-2MW-3MW-4NC2LGWQS
APPENDIX A
Photograph No. 1
View of site from Morganton Blvd. SW.
Photograph No. 2
View of MW-1 that was filled with dirt but monitoring well was not damaged.
APPENDIX B
APPENDIX C