MO-7049_27981_CA_RPTS_20230413_RDC

2701 Westport Road
Charlotte, NC 28208
P [phone]
F [phone]
Terracon.com

April 13, 2023

Ms. Sharon Ghiold
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Email: [e-mail]

Re: Letter Report
(Former) McCain Grocery
10018 Lancaster Highway
Waxhaw, Union County, North Carolina
UST Incident Number: 27981
Terracon Project No. 71159685B

Dear Ms. Ghiold:

Terracon Consultants, Inc. (Terracon) is pleased to submit this Letter Report for the
above referenced property. This report has been prepared in general accordance with
North Carolina Department of Environmental Quality (NCDEQ), UST Section
Assessment Guidelines, dated January 19, 2021, and Task Authorization No. 04,
approved on September 13, 2022.

On November 8, 2022, Terracon mobilized to the site to observe various site activities
conducted in association with a Remedial Design Characterization (RDC) investigation,
completed by AST Environmental (AST). Site activities included the advancement of
multiple soil borings and collection of soil and groundwater samples for laboratory
analysis. Field notes are included in Appendix A. Sampling protocol, specific
laboratory analysis, and discussion of the analytical results are included in the
Quantitative High Resolution Site Characterization Report (qHRSC), completed by AST
and provided in Appendix B.

(Former) McCain Grocery Waxhaw, North Carolina Project Number 71159685B
Incident No. 27981
April 13, 2023

2
If you have any questions regarding this report, please contact us at 704-509-1777.

Sincerely,

Terracon Consultants, Inc.

Erin E. Greene M. Neal McElveen, PE
Staff Geologist Principal

Attachments:
Appendix A – Field Notes
Appendix B – Quantitative High Resolution Site Characterization Report

APPENDIX A
Field Notes

APPENDIX B
Quantitative High Resolution Site
Characterization Report

1567 CF Pours
Harrisonburg, VA 22802
www.astenvironmental.com
March 2, 2023 Ms. Sharon Ghiold
North Carolina Department of Environmental Quality 217 W Jones St. Raleigh, NC 27603

RE: Quantitative High Resolution Site Characterization Report McCain Grocery: Incident (#27981)
10018 Lancaster Highway Waxhaw, Monroe County, North Carolina
Dear Ms. Ghiold, AST Environmental, Inc. (AST) appreciates the opportunity collaborate with Terracon and NCDEQ to the complete the Quantitative High Resolution Site Characterization (qHRSC) at the
above referenced location. The proposed scope of work was to complete up to 8 soil borings to approximately 50 ft-bgs. The overall goal of this qHRSC program is to: 1. Quantify the TVPH and benzene soil concentrations. 2. Provide a visual interpolation of a high-resolution data set to aide in future investigation and remedial activities.
3. Design a BOS 200+ injection plan to bring groundwater concentrations in compliance with regulatory requirements. This letter report provides a summary of field activities during the RDC and an overview of analytical soil and groundwater data.
REMEDIAL DESIGN CHARACTERIZATION
On Tuesday November 8, 2022 AST mobilized to the site to begin direct push drilling with the Geologic Exploration (GEX) drilling team. During the RDC event, a total of 8 soil borings were advanced via direct push drilling by GEX using their Geoprobe 3230DT. At each boring location,
a 3.75 inch diameter direct push, dual tube tooling was advanced in five foot runs. Samples were collected every two feet beginning at PID or olfactory presence of hydrocarbon mass. All intervals were logged for lithology and PID readings were collected to guide the sampling process. Soil
samples were collected and shipped to the RPI Project Support Laboratory in Golden, CO for VOC and Total Volatile Petroleum Hydrocarbon (TVPH) analysis via EPA method 8260B. Although this data is used for injection design purposes, the lab is not a certified or accredited
laboratory, this data should not be used for regulator or compliance purposes. Existing monitoring wells MW-1R, MW-2 and MW-6 were developed and sampled. Groundwater
samples were shipped to the RPI Project Support Laboratory in Golden, CO for VOC and Total Volatile Petroleum Hydrocarbon (TVPH) analysis via EPA method 8260B, anions via EPA method 300.1 and dissolved gases via EPA method RSK 175. Groundwater data has been tabulated and is included in the attachments as Table 2. Historically, MW-1R and MW-6 have consistently shown benzene concentrations greater than 5,000 ug/L and MW-2 with benzene concentrations consistently above 1 ug/L. Select results from the RDC have been tabulated within this report and can be found below. According to the ITRC LNAPL Guidance Document, TVPH concentrations indicative of residual LNAPL in the subsurface
Ms. Sharon Ghiold March 2, 2023 Page 2

are between 250 and 500 mg/kg, depending on the soil type. TVPH concentrations observed at
this site range from less than 0.5 to over 16,000 mg/kg TVPH, with RDC-01, RDC-07 and RDC-08 displaying the highest concentrations.
Boring logs for each location are included in Attachment B.
RDC-01 Soil Concentrations
Sample Depth Benzene (ug/kg) TVPH (mg/kg)
22 <25 1,500
24 <25 580 26 <25 4,900 28 <50 3,300
30 33 6,400
32 <50 3,100
34 4,900 16,400
36 <25 150
38 <10 8.4 40 43 <10 42 130 <10
44 340 <10
45 1,300 210
46 1,700 1,100

RDC-07 Soil Concentrations
Sample Depth Benzene (ug/kg) TVPH (mg/kg)
19 <10 <10 22 <0.5 0.6 24 <0.5 0.8
27 <0.5 0.7
29 <0.5 0.6
32 <50 48
34 <50 110
36 <50 35 38 3.9 0.6 40 <25 240
42 <25 <25
44 <0.5 1.5
46 410 3
48 330 <25 50 5.2 <0.5

Ms. Sharon Ghiold March 2, 2023 Page 3

RDC-08 Soil Concentrations
Sample Depth Benzene (ug/kg) TVPH (mg/kg)
28 <0.5 1
30 <0.5 0.7
33 <0.5 1.2
35 0.5 1.3 36 1.2 1.1 38 2.6 1.1
40 2.3 1.3
42 110 870
44 <50 3,600
46 640 46
48 520 8.9 50 920 9.1

3-Dimensional Quantitative Model The soil data collected from the RDC program was loaded into Ejlskov Environmental Site Model (ESM), a proprietary data visualization and acquisition software developed by Ejlskov A/S, a RPI Group member. Once entered in the software, a 3-dimensional interpolation of the benzene and TVPH soil data was produced by using the ESM inverse distance algorithm. From the review of this data, 2-dimensional figures of the benzene and TVPH maximum soil concentrations, benzene groundwater isoconcentration map, and cross sections of both contaminant plumes were created
and are included in the Figures attachment. A total of approximately 8,600 lbs of TVPH and 1,800 lbs of benzene are estimated in the
subsurface based on the ESM 3-d interpolation of the data. This mass total should only be used viewed as an estimate to possibly generate rough order of magnitude estimate for potential remediation costs.

Conclusions and Recommendations As indicated above, the ITRC LNAPL Guidance Document states that TVPH concentrations indicative of residual LNAPL in the subsurface are between 250 and 500 mg/kg, depending on the soil type. Based on the data collected during the RDC event and the subsequent interpolation of the data, the subsurface distribution of residual LNAPL is confined to the area immediately surrounding and below the former tank pit. In addition to the quantification of residual LNAPL using the TVPH concentrations, the saturated benzene soil concentrations are also used for determination of injection locations and depths in order to meet the 2L groundwater standard. Using the state of Washington three phase partitioning model (https://www.ezview.wa.gov/Portals/_1987/Documents/Documents/WAC_173-340-
747_SoilDefaultHydrogeologicParameterData_2001.pdf), to be protective of groundwater at 1 ug/L benzene, soil concentrations of benzene must be below 0.411 ug/kg. Considering detection limits for soil are at 0.5 ug/kg, AST has targeted benzene concentrations with reportable concentrations in excess of 1 ug/kg or above the detection limit listed at or above 25 ug/kg. The vertical distribution of elevated soil concentrations were generally observed with peak
concentrations near the water table, ~40’ bgs. In addition to the elevated concentrations observed at the water table near the former tank pit, vertical migration deeper into the saturated zone is also observed in the data, specifically the elevated benzene concentrations at termination depths
Ms. Sharon Ghiold March 2, 2023 Page 4

of RDC-01, RDC-7, and RDC-08., Attachment A (RPI soil data) and Attachment B (Soil Boring
Logs). The transport mechanism allowing the vertical migration of LNAPL appears to be vertical to subvertical remnant foliation and fracture structure from the parent rock.
Based on the data generated during this qHRSC, AST recommends that a BOS 200+ injection program be considered for this site, particularly in Area A and Area B, due to the residual LNAPL concentrations present. Based on the 2L remediation goal of 1 ug/L benzene, and the elevated soil mass present in the injection area, a BOS 200 plan has been completed that includes supplemental additives to increase the rate of degradation on the activated carbon surface and prolong the ability of the facultative microbes to continue the degradation process for years.

BOS 200+ INJECTION DESIGN – SEE ATTACHED FOR DESIGN LOADINGS & FIGURE FOR LOCATIONS BOS 200® provides the unique capability (Trap & Treat® process) to utilize two proven and powerful technologies that rapidly and effectively remediate petroleum hydrocarbon sites:
1) Trapping of the contaminants via activated carbon adsorption. 2) Subsequent treatment via biological degradation within the BOS 200® matrix utilizing both
aerobic and anaerobic microbial processes. The “Trap” provides the immediate mass reduction and plume control, while the “Treat” provides
the continued long-term remedial degradation using synergistic facultative bacteria. No other activated carbon product can emplace a biological treatment mechanism on activated carbon for injection; this intellectual property is protected by RPI patents. AST is designed by RPI as the product design arm and distributor for the RPI Group. BOS 200® is a fine-grained, dry material which consists of activated carbon, calcium sulfate, nitrate, phosphate, and ammonia in a proprietary blend. It is 77% by weight activated carbon and up to 19% gypsum. The gypsum component itself is 79% by weight sulfate, which translates to approximately 15% by weight sulfate in BOS 200®. The product is mixed with water and a facultative blend of aerobic and anaerobic microbes to create a solids suspension. This is now an ideal environment for biological degradation, where hydrocarbons are adsorbed on to BOS 200® particles made up of: • Terminal Electron Acceptors: oxygen, nitrate, ammonia, and sulfate (primary) • Micro- and Macro-Nutrients - phosphorus and nitrogen
• Aerobic and anaerobic blend of facultative microbes (over 27 species) On flexibility, with BOS 200® product, the design approach can vary from a treatment objective
where complete and immediate contaminant mass removal from the groundwater is achieved, to a partial contaminant mass reduction working in conjunction with biological degradation driving the groundwater cleanup effort, or any combination somewhere in between. The end effect is that
the plume can be controlled in a short period of time and treatment can be extended over a longer period. The revised BOS 200® injection design has been prepared for each area using the following approach/basis: 1. RDC and historical data from soil and groundwater sampling (i.e., analytical results, the screened interval of the wells, the soil sampling depth intervals) were used to determine the vertical and horizontal extent of impacts in each area. 2. Using the same data for each area a contaminant mass loading on a unit basis (lb.
Ms. Sharon Ghiold March 2, 2023 Page 5

benzene per ft3 of impacted media) was determined for each of the designated areas.
3. The contaminant mass loadings were then used to determine the BOS 200® loadings (lbs. installed per ft3 of impacted media) necessary to remediate a specific depth interval within
each injection area. This is a balance between the need to have an immediate mass reduction or to allow the biological process to be the controlling process. This is specifically discussed for each area below.
4. Based on the recent RDC soil data discovered, a second injection event is
necessary to reach the remediation goal of 1 ug/L benzene and may be needed for
Area A. However, quarterly monitoring of the terminal electron acceptor
consumption will dictate if/when that additional event occurs.

Based on the total saturated soil mass present, a second injection event may be necessary
in Area A and Area C to achieve closure levels at this site. Tracking the dissolved phase
contaminant trends (BTEX, TVPH), along with the terminal electron acceptor trend post
injection, specifically sulfate, will determine the necessity and timing of the second
injection.

POST INJECTION SAMPLING

Following the injection, AST will collect groundwater samples from all of the monitoring wells within the injection area prior to demobilizing. AST recommends performance progress groundwater sampling events at intervals of one week, two weeks, one-month post injection and quarterly until remediation goals are obtained. AST understands that this will be performed by others. The performance samples can be sent to Remediation Products, Ince. Laboratory in Golden, CO for no cost of analyses. The cost of shipment will be the responsibility of the consultant. The analyses will be consistent with that described previously. If you have any questions or wish to discuss the information provided herein, please contact me at [phone] or via email at [e-mail]. Sincerely, AST Environmental, Inc.
Nathan Thacker Senior Geologist

Figures

Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Site Plan
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
1
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Groundwater Benzene Isoconcentrations
Based on samples collected during the November 2022 RDC
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
2
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Soil Benzene Isoconcentrations
Based on samples collected during the November 2022 RDC
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
3
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Soil TVPH Isoconcentrations
Based on samples collected during the November 2022 RDC
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
4
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Fence Line A-A'
Soil Benzene Isoconcentrations
Based on samples collected during the November 2022 RDC
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
5
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Fence Line A-A'
Soil TVPH Isoconcentrations
Based on samples collected during the November 2022 RDC
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
6
Monitoring Well
RDC Soil Boring
Legend
AST Environmental
1567 CF Pours Drive
Harrisonburg, Virginia
www.astenv.com
Site Plan
McCain Grocery
10018 Lancaster Highway
Waxhaw, North Carolina
NCDEQ Incident #27981
Figure
1

Tables

Table 1 - VOC, TVPH & Anions
Benzene Toluene Ethylbenzne m/p-Xylene o-Xylene 1,2,4-TMB NAP TVPH Nitrate Nitrite Sulfate
ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L mg/L mg/L mg/L
1 600 600 500 500 400 6
MW-1R 11/9/2022 9500 20800 1900 8000 3900 1300 230 <50 3.5 <2 8.1
MW-2 11/9/2022 89 90 97 2500 310 1100 56 <50 <2 <2 <2
MW-6 11/9/2022 2500 5400 1700 5700 2300 1600 210 <10 <2 <2 <4.2
Allowable Levels
Sample ID
Date
Sampled
Table 2 - Soil VOC and TVPH
Benzene Toluene Ethylbenzne m/p-Xylene o-Xylene 1,2,4-TMB NAP TVPH
ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg mg/Kg11/8/2022 8 <10 10 <10 25 21 33 9.5 <10
11/8/2022 10 <10 610 730 3400 3900 29100 1500 1600
11/8/2022 12 <25 2300 1600 23100 25300 168000 59700 650011/8/2022 14 <25 440 490 4500 4100 22100 16100 1700
11/8/2022 17 <50 590 860 5400 3800 31700 16500 190011/8/2022 18 <25 250 410 2100 1300 14200 10800 770
11/8/2022 20 <25 1000 2400 22700 15300 32300 28400 1700
11/8/2022 22 <25 820 3300 25000 16300 27800 21400 150011/8/2022 24 <25 110 270 1400 920 13500 13300 580
11/8/2022 26 <25 6300 35400 175000 74900 166000 51700 490011/8/2022 28 <50 8800 42700 183000 88900 157000 59400 3300
11/8/2022 30 33 51800 71200 315000 129000 194000 56100 6400
11/8/2022 32 <50 11700 51800 198000 93600 158000 51500 310011/8/2022 34 4900 551000 250000 870000 340000 427000 127000 16400
11/8/2022 36 <25 840 650 2400 980 2400 3400 15011/8/2022 38 <10 82 47 180 82 160 220 8.4
11/8/2022 40 43 300 47 170 110 120 91 <10
11/8/2022 42 130 440 59 190 100 93 66 <1011/8/2022 44 340 1400 150 460 240 130 53 <10
11/8/2022 45 1300 8300 3100 9000 3400 5100 580 21011/8/2022 46 1700 22000 11500 36100 13100 20600 1700 1100
11/8/2022 36 11 39 8.8 40 21 18 9 0.611/8/2022 38 <10 110 140 2800 810 4200 480 99
11/8/2022 40 <10 40 45 2200 440 2300 310 65
11/8/2022 42 <10 20 39 370 27 550 140 1811/8/2022 43.5 <10 63 230 3400 310 3900 430 140
11/8/2022 45 5.6 16 4 19 11 9.5 13 0.511/8/2022 49 <10 20 9.9 66 23 170 79 <1011/8/2022 50 <10 16 <10 31 13 59 41 <10
11/8/2022 32.5 <10 <10 <10 11 <10 33 25 <10
11/8/2022 33 <10 <10 <10 <10 <10 22 20 <10
11/8/2022 35 <10 <10 <10 <10 <10 15 14 <1011/8/2022 36 <10 <10 <10 <10 <10 9.9 <10 <10
11/8/2022 38 <10 <10 <10 <10 <10 <10 <10 <1011/8/2022 40 <10 <10 <10 <10 <10 10 <10 <10
11/8/2022 42 <10 <10 <10 250 81 220 <10 <10
11/8/2022 43 <10 <10 27 1900 460 4500 130 22011/8/2022 45 <10 <10 <10 90 37 590 53 17
11/8/2022 46 <10 <10 <10 31 13 180 20 <1011/8/2022 48 <10 <10 <10 45 17 71 14 <1011/8/2022 50 <10 <10 <10 <10 <10 25 <10 <10
11/8/2022 38 <10 <10 <10 <10 <10 15 <10 <10
11/8/2022 39 <10 <10 <10 <10 <10 9.7 <10 <10
11/8/2022 40 <10 <10 <10 <10 <10 <10 <10 <1011/8/2022 42 <10 <10 74 370 90 1100 24 69
11/8/2022 44 <25 <10 <25 <25 <25 150 21 <1011/8/2022 46 <10 <10 <10 9.7 <10 46 <10 <10
11/8/2022 48 <10 28 <10 27 18 27 11 <1011/8/2022 50 <10 <10 <10 <10 <10 <10 <10 <10
11/8/2022 23 <10 11 12 52 26 250 150 1311/8/2022 25 <10 <10 <10 12 <10 36 35 7.811/8/2022 26 <10 <10 <10 <10 <10 17 21 7.2
11/8/2022 28 <10 <10 <10 <10 <10 9.7 14 <1011/8/2022 30 <10 <10 <10 <10 <10 <10 <10 <10
11/8/2022 32 <10 <10 <10 <10 <10 <10 <10 <1011/8/2022 35 <10 <10 <10 <10 <10 <10 <10 1111/8/2022 36 <10 <10 <10 <10 <10 <10 <10 <10
11/8/2022 38 <10 <10 <10 <10 <10 <10 <10 7.411/8/2022 40 <10 <10 <10 <10 <10 <10 <10 <10
11/8/2022 41 <10 95 21 91 62 36 22 7.611/8/2022 43 51 160 44 170 82 64 52 <1011/8/2022 45 <0.5 2.5 1 4.6 2.1 4.9 5.7 <0.5
11/8/2022 46 <25 100 140 <25 57 29 <25 <2511/8/2022 48 0.6 2.5 1 4.4 2.3 5.9 4.8 <0.511/8/2022 50 <0.5 2.1 1.9 7 4.3 6.8 8.1 0.6
Sample ID Sample Date
Sample
Depth
RDC-1
RDC-02
RDC-03
RDC-04
RDC-05
Table 2 - Soil VOC and TVPH
Benzene Toluene Ethylbenzne m/p-Xylene o-Xylene 1,2,4-TMB NAP TVPH
ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg ug/Kg mg/Kg
Sample ID Sample Date
Sample
Depth
11/9/2022 32 <0.5 1.3 0.9 3.8 3 6.8 5.9 <0.511/9/2022 33 <0.5 4.1 1.8 9.2 4.8 9.1 5.2 <0.5
11/9/2022 35 <10 <10 <10 <10 <10 <10 <10 <10
11/9/2022 36 <10 <10 <10 <10 <10 <10 <10 <1011/9/2022 38 <0.5 0.6 0.6 2.4 1.4 4.9 2.8 <0.5
11/9/2022 40 <25 <25 <25 57 <25 2700 1100 18011/9/2022 41 <10 9.9 <10 25 9.2 43 81 13
11/9/2022 19 <10 <10 <10 <10 <10 <10 11 <1011/9/2022 22 <0.5 <0.5 <0.5 1.3 0.7 7.5 7.6 0.6
11/9/2022 24 <10 <0.5 <0.5 1.2 0.7 9.3 9.9 0.8
11/9/2022 27 <10 <0.5 <0.5 1.1 0.9 5.5 1.8 0.711/9/2022 29 <10 <0.5 <0.5 1.1 0.6 2.4 11 0.6
11/9/2022 32 <50 <50 <50 <50 <50 290 1600 4811/9/2022 34 <10 <50 <50 350 260 4800 1200 110
11/9/2022 36 <10 <50 <50 <50 <50 590 310 35
11/9/2022 38 3.9 2.5 4.1 15 9.8 13 5.6 0.611/9/2022 40 <25 100 1700 6900 3000 10500 1600 240
11/9/2022 42 <25 <25 <25 31 <25 77 61 <2511/9/2022 44 <10 0.7 0.8 2.8 1.4 3.9 41 1.5
11/9/2022 46 410 15 73 230 110 54 53 3
11/9/2022 48 330 <25 60 210 80 47 <25 <2511/9/2022 50 5.2 3.1 5.4 18 11 11 13 <0.5
11/9/2022 12 <10 <10 <10 <10 <10 <10 <10 <1011/9/2022 14 <10 <10 <10 <10 <10 <10 <10 <10
11/9/2022 18 <0.5 <0.5 <0.5 1.4 0.8 1.3 1.6 0.611/9/2022 20 <10 <10 <10 <10 <10 <10 <10 <10
11/9/2022 22 <10 <10 <10 <10 <10 <10 <10 <10
11/9/2022 24 0.7 1 1.7 6.4 3.7 6.1 6.4 0.611/9/2022 26 0.6 1.7 3.2 11 6.1 12 12 0.7
11/9/2022 28 <0.5 <0.5 0.9 2.7 1.6 4 5.3 111/9/2022 30 <0.5 1 1.5 4.5 2.6 5.6 15 0.7
11/9/2022 33 <0.5 6 7.9 22 15 10 6.5 1.2
11/9/2022 35 0.5 7.1 9.8 28 19 15 12 1.311/9/2022 36 1.2 18 18 50 34 19 16 1.1
11/9/2022 38 2.6 22 17 44 30 16 11 1.111/9/2022 40 2.3 24 26 71 50 28 9.7 1.3
11/9/2022 42 110 12800 11800 33800 14200 21300 4000 870
11/9/2022 44 <50 16800 41800 117000 45300 77300 14400 360011/9/2022 46 640 2000 550 1700 710 770 300 46
11/9/2022 48 520 18 <10 27 13 17 29 8.911/9/2022 50 920 13 <10 16 <10 10 20 9.1
RDC-06
RDC-07
RDC-08

Attachment A
RPI Laboratory Analytical Data

McCain Grocery
Sample ID. No.MW-1R
Date Sampled 11/9/2022
Sample Depth 38-48 ft

Reporting
Limit Units Flags
Dimethyl Sulfide ND 50 ug/L
MTBE ND 50 ug/L
1,2-Dichloroethane 740 50 ug/L
Benzene 9500 50 ug/L
Toluene 20800 50 ug/L
Ethylbenzene 1900 50 ug/L
m/p-Xylene 8000 50 ug/L
o-Xylene 3900 50 ug/L
1,2,4-Trimethylbenzene 1300 50 ug/L
Naphthalene 230 50 ug/L
TVPH ND 50 mg/L
% Surrogate Recovery
1,2-Dichloroethane-d4 100
d8-Toluene 105
p-Bromofluorobenzene 102
Lactate ND 2 mg/L
Acetate 54 2 mg/L
Propionate 7.9 2 mg/L
Formate/Isobutyrate 6.6 4 mg/L
Butyrate 2.6 2 mg/L
Pyruvate ND 2 mg/L
Chloride 20 2 mg/L
Nitrite ND 2 mg/L
Succinate ND 10 mg/L
Nitrate 3.5 2 mg/L
Sulfate 8.1 2 mg/L
Phosphate NA 2 mg/L
Sulfide ND 2 mg/L
Methane 670 20 ug/L
Ethane ND 2 ug/L
Ethylene 22 2 ug/L
Propane ND 2 ug/L
Propylene ND 2 ug/L
Isobutane 17 2 ug/L
n-Butane 100 2 ug/L
Acetylene ND 2 ug/L
t-2-Butene 7.9 2 ug/L
1-Butene 4.5 2 ug/L
Isobutylene 3.4 2 ug/L
cis-2-Butene 8.2 2 ug/L
1,3-Butadiene ND 2 ug/L
Methyl Acetylene ND 2 ug/L
Carbon Dioxide 240 2 mg/L
Sample ID. No.MW-2
Date Sampled 11/9/2022
Sample Depth 35-45 ft

Reporting
Limit Units Flags
Dimethyl Sulfide ND 50 ug/L
MTBE ND 50 ug/L
1,2-Dichloroethane 41 50 ug/L J
Benzene 89 50 ug/L
Toluene 90 50 ug/L
Ethylbenzene 97 50 ug/L
m/p-Xylene 2500 50 ug/L
o-Xylene 310 50 ug/L
1,2,4-Trimethylbenzene 1100 50 ug/L
Naphthalene 56 50 ug/L
TVPH ND 50 mg/L
% Surrogate Recovery
1,2-Dichloroethane-d4 100
d8-Toluene 105
p-Bromofluorobenzene 101
Lactate ND 2 mg/L
Acetate ND 2 mg/L
Propionate ND 2 mg/L
Formate/Isobutyrate ND 4 mg/L
Butyrate ND 2 mg/L
Pyruvate ND 2 mg/L
Chloride 6.7 2 mg/L
Nitrite ND 2 mg/L
Succinate ND 10 mg/L
Nitrate ND 2 mg/L
Sulfate ND 2 mg/L
Phosphate NA 2 mg/L
Sulfide ND 2 mg/L
Methane 1400 20 ug/L
Ethane ND 2 ug/L
Ethylene ND 2 ug/L
Propane ND 2 ug/L
Propylene ND 2 ug/L
Isobutane 2.5 2 ug/L
n-Butane 20 2 ug/L
Acetylene ND 2 ug/L
t-2-Butene ND 2 ug/L
1-Butene ND 2 ug/L
Isobutylene ND 2 ug/L
cis-2-Butene ND 2 ug/L
1,3-Butadiene ND 2 ug/L
Methyl Acetylene ND 2 ug/L
Carbon Dioxide 240 2 mg/L
Sample ID. No.MW-6
Date Sampled 11/9/2022
Sample Depth 38-48 ft

Reporting
Limit Units Flags
Dimethyl Sulfide ND 10 ug/L
MTBE ND 10 ug/L
1,2-Dichloroethane 92 10 ug/L
Benzene 2500 10 ug/L
Toluene 5400 10 ug/L
Ethylbenzene 1700 10 ug/L
m/p-Xylene 5700 10 ug/L
o-Xylene 2300 10 ug/L
1,2,4-Trimethylbenzene 1600 10 ug/L
Naphthalene 210 10 ug/L
TVPH ND 10 mg/L
% Surrogate Recovery
1,2-Dichloroethane-d4 100
d8-Toluene 106
p-Bromofluorobenzene 99
Lactate ND 2 mg/L
Acetate ND 2 mg/L
Propionate ND 2 mg/L
Formate/Isobutyrate ND 4 mg/L
Butyrate ND 2 mg/L
Pyruvate ND 2 mg/L
Chloride 39 2 mg/L
Nitrite ND 2 mg/L
Succinate ND 10 mg/L
Nitrate ND 2 mg/L
Sulfate 4.2 2 mg/L
Phosphate NA 2 mg/L
Sulfide ND 2 mg/L
Methane 130 20 ug/L
Ethane ND 2 ug/L
Ethylene 4.5 2 ug/L
Propane ND 2 ug/L
Propylene ND 2 ug/L
Isobutane 4.6 2 ug/L
n-Butane 33 2 ug/L
Acetylene ND 2 ug/L
t-2-Butene ND 2 ug/L
1-Butene ND 2 ug/L
Isobutylene ND 2 ug/L
cis-2-Butene ND 2 ug/L
1,3-Butadiene ND 2 ug/L
Methyl Acetylene ND 2 ug/L
Carbon Dioxide 250 2 mg/L
McCain Grocery
Sample ID. No.RDC-01 RDC-01 RDC-01
Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 8 10 12

Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 25 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 25 ug/Kg1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 25 ug/Kg
Benzene ND 10 ug/Kg ND 10 ug/Kg ND 25 ug/Kg
Toluene 10 10 ug/Kg 610 10 ug/Kg 2300 25 ug/KgEthylbenzene ND 10 ug/Kg 730 10 ug/Kg 1600 25 ug/Kg
m/p-Xylene 25 10 ug/Kg 3400 10 ug/Kg 23100 100 ug/Kg
o-Xylene 21 10 ug/Kg 3900 10 ug/Kg 25300 100 ug/Kg1,2,4-Trimethylbenzene 33 10 ug/Kg 29100 50 ug/Kg 168000 500 ug/Kg
Naphthalene 9.5 10 ug/Kg J 1500 10 ug/Kg 59700 100 ug/Kg
TVPH ND 10 mg/Kg 1600 50 mg/Kg 6500 500 mg/Kg
% Surrogate Recovery
1,2-Dichloroethane-d4 101 101 85
d8-Toluene 102 105 101p-Bromofluorobenzene 101 120 112
McCain Grocery
Sample ID. No.
Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE 1,2-Dichloroethane
Benzene
Toluene Ethylbenzene
m/p-Xylene
o-Xylene 1,2,4-Trimethylbenzene
Naphthalene
TVPH
% Surrogate Recovery
1,2-Dichloroethane-d4
d8-Toluenep-Bromofluorobenzene
RDC-01 RDC-01 RDC-01 RDC-01
11/8/2022 11/8/2022 11/8/2022 11/8/2022
14 17 18 20Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 25 ug/Kg ND 50 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
ND 25 ug/Kg ND 50 ug/Kg ND 25 ug/Kg ND 25 ug/KgND25ug/Kg ND 50 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
ND 25 ug/Kg ND 50 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
440 25 ug/Kg 590 50 ug/Kg 250 25 ug/Kg 1000 25 ug/Kg49025ug/Kg 860 50 ug/Kg 410 25 ug/Kg 2400 25 ug/Kg
4500 25 ug/Kg 5400 50 ug/Kg 2100 25 ug/Kg 22700 25 ug/Kg
4100 25 ug/Kg 3800 50 ug/Kg 1300 25 ug/Kg 15300 25 ug/Kg2210025ug/Kg 31700 50 ug/Kg 14200 25 ug/Kg 32300 25 ug/Kg
16100 25 ug/Kg 16500 50 ug/Kg 10800 25 ug/Kg 28400 25 ug/Kg
1700 25 mg/Kg E 1900 50 mg/Kg 770 25 mg/Kg 1700 25 mg/Kg
81 83 87 86
101 99 101 104119109107127
Sample ID. No.RDC-01 RDC-01 RDC-01Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 22 24 26
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 25 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
MTBE ND 25 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
1,2-Dichloroethane ND 25 ug/Kg ND 25 ug/Kg ND 25 ug/KgBenzene ND 25 ug/Kg ND 25 ug/Kg ND 25 ug/Kg
Toluene 820 25 ug/Kg 110 25 ug/Kg 6300 25 ug/Kg
Ethylbenzene 3300 25 ug/Kg 270 25 ug/Kg 35400 100 ug/Kgm/p-Xylene 25000 25 ug/Kg 1400 25 ug/Kg 175000 500 ug/Kg
o-Xylene 16300 25 ug/Kg 920 25 ug/Kg 74900 100 ug/Kg
1,2,4-Trimethylbenzene 27800 25 ug/Kg 13500 25 ug/Kg 166000 500 ug/KgNaphthalene 21400 25 ug/Kg 13300 25 ug/Kg 51700 100 ug/Kg
TVPH 1500 25 mg/Kg 580 25 mg/Kg 4900 500 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 84 84 81
d8-Toluene 102 101 105
p-Bromofluorobenzene 123 107 131
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-01 RDC-01 RDC-01 RDC-0111/8/2022 11/8/2022 11/8/2022 11/8/2022
28 30 32 34
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 50 ug/Kg ND 25 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 50 ug/Kg ND 25 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 50 ug/Kg ND 25 ug/Kg ND 50 ug/Kg ND 50 ug/KgND50ug/Kg 33 25 ug/Kg ND 50 ug/Kg 4900 50 ug/Kg
8800 50 ug/Kg 51800 100 ug/Kg 11700 50 ug/Kg 551000 2500 ug/Kg
42700 250 ug/Kg 71200 100 ug/Kg 51800 250 ug/Kg 250000 500 ug/Kg183000250ug/Kg 315000 500 ug/Kg 198000 250 ug/Kg 870000 2500 ug/Kg
88900 250 ug/Kg 129000 500 ug/Kg 93600 250 ug/Kg 340000 500 ug/Kg
157000 250 ug/Kg 194000 500 ug/Kg 158000 250 ug/Kg 427000 2500 ug/Kg59400250ug/Kg 56100 100 ug/Kg 51500 250 ug/Kg 127000 500 ug/Kg
3300 250 mg/Kg 6400 500 mg/Kg 3100 250 mg/Kg 16400 2500 mg/Kg
86 82 85 83
104 100 100 98
124 114 126 108
Sample ID. No.RDC-01 RDC-01 RDC-01Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 36 38 40
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 25 ug/Kg ND 10 ug/Kg 43 10 ug/Kg
Toluene 840 25 ug/Kg 82 10 ug/Kg 300 10 ug/Kg
Ethylbenzene 650 25 ug/Kg 47 10 ug/Kg 47 10 ug/Kgm/p-Xylene 2400 25 ug/Kg 180 10 ug/Kg 170 10 ug/Kg
o-Xylene 980 25 ug/Kg 82 10 ug/Kg 110 10 ug/Kg
1,2,4-Trimethylbenzene 2400 25 ug/Kg 160 10 ug/Kg 120 10 ug/KgNaphthalene 3400 25 ug/Kg 220 10 ug/Kg 91 10 ug/Kg
TVPH 150 25 mg/Kg 8.4 10 mg/Kg J ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 84 96 111
d8-Toluene 100 101 103
p-Bromofluorobenzene 107 111 89
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-01 RDC-01 RDC-01 RDC-0111/8/2022 11/8/2022 11/8/2022 11/8/2022
42 44 45 46
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg13010ug/Kg 340 10 ug/Kg 1300 10 ug/Kg 1700 10 ug/Kg
440 10 ug/Kg 1400 10 ug/Kg 8300 10 ug/Kg 22000 100 ug/Kg
59 10 ug/Kg 150 10 ug/Kg 3100 10 ug/Kg 11500 100 ug/Kg19010ug/Kg 460 10 ug/Kg 9000 10 ug/Kg 36100 100 ug/Kg
100 10 ug/Kg 240 10 ug/Kg 3400 10 ug/Kg 13100 100 ug/Kg
93 10 ug/Kg 130 10 ug/Kg 5100 10 ug/Kg 20600 100 ug/Kg6610ug/Kg 53 10 ug/Kg 580 10 ug/Kg 1700 10 ug/Kg
ND 10 mg/Kg ND 10 mg/Kg 210 10 mg/Kg 1100 100 mg/Kg
106 103 99 89
103 105 129 198
91 86 100 108
Sample ID. No.RDC-02 RDC-02 RDC-02Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 36 38 40
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 0.5 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 0.5 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 0.5 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene 11 0.5 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene 39 0.5 ug/Kg 110 10 ug/Kg 40 10 ug/Kg
Ethylbenzene 8.8 0.5 ug/Kg 140 10 ug/Kg 45 10 ug/Kgm/p-Xylene 40 0.5 ug/Kg 2800 10 ug/Kg 2200 10 ug/Kg
o-Xylene 21 0.5 ug/Kg 810 10 ug/Kg 440 10 ug/Kg
1,2,4-Trimethylbenzene 18 0.5 ug/Kg 4200 10 ug/Kg 2300 10 ug/KgNaphthalene 9 0.5 ug/Kg 480 10 ug/Kg 310 10 ug/Kg
TVPH 0.6 0.5 mg/Kg 99 10 mg/Kg 65 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 113 94 97
d8-Toluene 101 116 112
p-Bromofluorobenzene 99 88 92
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-02 RDC-02 RDC-02 RDC-0211/8/2022 11/8/2022 11/8/2022 11/8/2022
42 43.5 45 49
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 10 ug/KgND10ug/Kg ND 25 ug/Kg 5.6 0.5 ug/Kg ND 10 ug/Kg
20 10 ug/Kg 63 25 ug/Kg 16 0.5 ug/Kg 20 10 ug/Kg
39 10 ug/Kg 230 25 ug/Kg 4 0.5 ug/Kg 9.9 10 ug/Kg J37010ug/Kg 3400 25 ug/Kg 19 0.5 ug/Kg 66 10 ug/Kg
27 10 ug/Kg 310 25 ug/Kg 11 0.5 ug/Kg 23 10 ug/Kg
550 10 ug/Kg 3900 25 ug/Kg 9.5 0.5 ug/Kg 170 10 ug/Kg14010ug/Kg 430 25 ug/Kg 13 0.5 ug/Kg 79 10 ug/Kg
18 10 mg/Kg 140 25 mg/Kg 0.5 0.5 mg/Kg ND 10 mg/Kg
92 93 111 95
107 109 101 105
90 95 101 89
Sample ID. No.RDC-02Date Sampled 11/8/2022
Sample Depth 50
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg
MTBE ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/KgBenzene ND 10 ug/Kg
Toluene 16 10 ug/Kg
Ethylbenzene ND 10 ug/Kgm/p-Xylene 31 10 ug/Kg
o-Xylene 13 10 ug/Kg
1,2,4-Trimethylbenzene 59 10 ug/KgNaphthalene 41 10 ug/Kg
TVPH ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 94
d8-Toluene 104
p-Bromofluorobenzene 89
Sample ID. No.RDC-03 RDC-03 RDC-03Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 32.5 33 35
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Ethylbenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kgm/p-Xylene 11 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
o-Xylene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2,4-Trimethylbenzene 33 10 ug/Kg 22 10 ug/Kg 15 10 ug/KgNaphthalene 25 10 ug/Kg 20 10 ug/Kg 14 10 ug/Kg
TVPH ND 10 mg/Kg ND 10 mg/Kg ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 91 92 94
d8-Toluene 105 105 104
p-Bromofluorobenzene 86 90 86
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-03 RDC-03 RDC-03 RDC-0311/8/2022 11/8/2022 11/8/2022 11/8/2022
36 38 40 42
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 10 ug/Kg ND 10 ug/Kg 250 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg 81 10 ug/Kg
9.9 10 ug/Kg J ND 10 ug/Kg 10 10 ug/Kg 220 10 ug/KgND10ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 mg/Kg ND 10 mg/Kg ND 10 mg/Kg ND 10 mg/Kg
82 84 87 86
96 95 95 96
85 85 85 88
Sample ID. No.RDC-03 RDC-03 RDC-03Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 43 45 46
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Ethylbenzene 27 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kgm/p-Xylene 1900 10 ug/Kg 90 10 ug/Kg 31 10 ug/Kg
o-Xylene 460 10 ug/Kg 37 10 ug/Kg 13 10 ug/Kg
1,2,4-Trimethylbenzene 4500 10 ug/Kg 590 10 ug/Kg 180 10 ug/KgNaphthalene 130 10 ug/Kg 53 10 ug/Kg 20 10 ug/Kg
TVPH 220 10 mg/Kg 17 10 mg/Kg ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 82 85 81
d8-Toluene 120 95 97
p-Bromofluorobenzene 94 92 86
Sample ID. No.RDC-04 RDC-04 RDC-04Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 38 39 40

Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Ethylbenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kgm/p-Xylene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
o-Xylene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2,4-Trimethylbenzene 15 10 ug/Kg 9.7 10 ug/Kg J ND 10 ug/Kg
Naphthalene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
TVPH ND 10 mg/Kg ND 10 mg/Kg ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 84 83 83
d8-Toluene 97 96 97
p-Bromofluorobenzene 87 87 88
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene
Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-03 RDC-0311/8/2022 11/8/2022
48 50
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg4510ug/Kg ND 10 ug/Kg
17 10 ug/Kg ND 10 ug/Kg
71 10 ug/Kg 25 10 ug/Kg1410ug/Kg ND 10 ug/Kg
ND 10 mg/Kg ND 10 mg/Kg
84 82
99 96
84 85
RDC-04 RDC-04 RDC-04 RDC-0411/8/2022 11/8/2022 11/8/2022 11/8/2022
42 44 46 48
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg 28 10 ug/Kg
74 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg ND 10 ug/Kg37010ug/Kg ND 25 ug/Kg 9.7 10 ug/Kg J 27 10 ug/Kg
90 10 ug/Kg ND 25 ug/Kg ND 10 ug/Kg 18 10 ug/Kg
1100 10 ug/Kg 150 25 ug/Kg 46 10 ug/Kg 27 10 ug/Kg
24 10 ug/Kg 21 25 ug/Kg ND 10 ug/Kg 11 10 ug/Kg
69 10 mg/Kg ND 25 mg/Kg ND 10 mg/Kg ND 10 mg/Kg
81 84 85 83
106 96 96 96
91 89 85 87
Sample ID. No.RDC-04
Date Sampled 11/8/2022Sample Depth 50

Reporting
Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg
MTBE ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg
Benzene ND 10 ug/KgToluene ND 10 ug/Kg
Ethylbenzene ND 10 ug/Kg
m/p-Xylene ND 10 ug/Kgo-Xylene ND 10 ug/Kg
1,2,4-Trimethylbenzene ND 10 ug/Kg
Naphthalene ND 10 ug/Kg
TVPH ND 10 mg/Kg
% Surrogate Recovery
1,2-Dichloroethane-d4 83d8-Toluene 96
p-Bromofluorobenzene 93
Sample ID. No.RDC-05 RDC-05 RDC-05Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 23 25 26
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene 11 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Ethylbenzene 12 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kgm/p-Xylene 52 10 ug/Kg 12 10 ug/Kg ND 10 ug/Kg
o-Xylene 26 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2,4-Trimethylbenzene 250 10 ug/Kg 36 10 ug/Kg 17 10 ug/KgNaphthalene 150 10 ug/Kg 35 10 ug/Kg 21 10 ug/Kg
TVPH 13 10 mg/Kg 7.8 10 mg/Kg J 7.2 10 mg/Kg J
% Surrogate Recovery1,2-Dichloroethane-d4 86 80 80
d8-Toluene 99 96 96
p-Bromofluorobenzene 89 85 87
Sample ID. No.RDC-05 RDC-05 RDC-05Date Sampled 11/8/2022 11/8/2022 11/8/2022
Sample Depth 36 38 40

Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Toluene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Ethylbenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kgm/p-Xylene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
o-Xylene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
1,2,4-Trimethylbenzene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
Naphthalene ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
TVPH ND 10 mg/Kg 7.4 10 mg/Kg J ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 85 85 87
d8-Toluene 96 96 94
p-Bromofluorobenzene 85 86 84
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene
Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-05 RDC-05 RDC-05 RDC-0511/8/2022 11/8/2022 11/8/2022 11/8/2022
28 30 32 35
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/KgND10ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
9.7 10 ug/Kg J ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg1410ug/Kg ND 10 ug/Kg ND 10 ug/Kg ND 10 ug/Kg
ND 10 mg/Kg ND 10 mg/Kg ND 10 mg/Kg 11 10 mg/Kg
87 84 78 88
97 98 97 96
87 88 88 85
RDC-05 RDC-05 RDC-05 RDC-0511/8/2022 11/8/2022 11/8/2022 11/8/2022
41 43 45 46
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
ND 10 ug/Kg ND 25 ug/Kg ND 0.5 ug/Kg ND 25 ug/KgND10ug/Kg 51 25 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
95 10 ug/Kg 160 25 ug/Kg 2.5 0.5 ug/Kg 100 25 ug/Kg
21 10 ug/Kg 44 25 ug/Kg 1 0.5 ug/Kg 140 25 ug/Kg9110ug/Kg 170 25 ug/Kg 4.6 0.5 ug/Kg ND 25 ug/Kg
62 10 ug/Kg 82 25 ug/Kg 2.1 0.5 ug/Kg 57 25 ug/Kg
36 10 ug/Kg 64 25 ug/Kg 4.9 0.5 ug/Kg 29 25 ug/Kg
22 10 ug/Kg 52 25 ug/Kg 5.7 0.5 ug/Kg ND 25 ug/Kg
7.6 10 mg/Kg J ND 25 mg/Kg ND 0.5 mg/Kg ND 25 mg/Kg
86 88 83 83
97 97 95 94
88 89 96 85
Sample ID. No.RDC-05 RDC-05Date Sampled 11/8/2022 11/8/2022
Sample Depth 48 50
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 0.5 ug/Kg ND 0.5 ug/Kg
MTBE ND 0.5 ug/Kg ND 0.5 ug/Kg
1,2-Dichloroethane ND 0.5 ug/Kg ND 0.5 ug/KgBenzene 0.6 0.5 ug/Kg ND 0.5 ug/Kg
Toluene 2.5 0.5 ug/Kg 2.1 0.5 ug/Kg
Ethylbenzene 1 0.5 ug/Kg 1.9 0.5 ug/Kgm/p-Xylene 4.4 0.5 ug/Kg 7 0.5 ug/Kg
o-Xylene 2.3 0.5 ug/Kg 4.3 0.5 ug/Kg
1,2,4-Trimethylbenzene 5.9 0.5 ug/Kg 6.8 0.5 ug/KgNaphthalene 4.8 0.5 ug/Kg 8.1 0.5 ug/Kg
TVPH ND 0.5 mg/Kg 0.6 0.5 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 87 79
d8-Toluene 96 96
p-Bromofluorobenzene 93 103
Sample ID. No.RDC-06 RDC-06 RDC-06Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 32 33 35
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 0.5 ug/Kg ND 0.5 ug/Kg ND 10 ug/Kg
MTBE ND 0.5 ug/Kg ND 0.5 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 0.5 ug/Kg ND 0.5 ug/Kg ND 10 ug/KgBenzene ND 0.5 ug/Kg ND 0.5 ug/Kg ND 10 ug/Kg
Toluene 1.3 0.5 ug/Kg 4.1 0.5 ug/Kg ND 10 ug/Kg
Ethylbenzene 0.9 0.5 ug/Kg 1.8 0.5 ug/Kg ND 10 ug/Kgm/p-Xylene 3.8 0.5 ug/Kg 9.2 0.5 ug/Kg ND 10 ug/Kg
o-Xylene 3 0.5 ug/Kg 4.8 0.5 ug/Kg ND 10 ug/Kg
1,2,4-Trimethylbenzene 6.8 0.5 ug/Kg 9.1 0.5 ug/Kg ND 10 ug/KgNaphthalene 5.9 0.5 ug/Kg 5.2 0.5 ug/Kg ND 10 ug/Kg
TVPH ND 0.5 mg/Kg ND 0.5 mg/Kg ND 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 74 98 91
d8-Toluene 90 93 96
p-Bromofluorobenzene 95 101 92
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-06 RDC-06 RDC-06 RDC-0611/9/2022 11/9/2022 11/9/2022 11/9/2022
36 38 40 41
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg ND 10 ug/KgND10ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg 0.6 0.5 ug/Kg ND 25 ug/Kg 9.9 10 ug/Kg J
ND 10 ug/Kg 0.6 0.5 ug/Kg ND 25 ug/Kg ND 10 ug/KgND10ug/Kg 2.4 0.5 ug/Kg 57 25 ug/Kg 25 10 ug/Kg
ND 10 ug/Kg 1.4 0.5 ug/Kg ND 25 ug/Kg 9.2 10 ug/Kg J
ND 10 ug/Kg 4.9 0.5 ug/Kg 2700 25 ug/Kg 43 10 ug/KgND10ug/Kg 2.8 0.5 ug/Kg 1100 25 ug/Kg 81 10 ug/Kg
ND 10 mg/Kg ND 0.5 mg/Kg 180 25 mg/Kg 13 10 mg/Kg
90 80 82 80
98 97 103 101
87 92 95 80
Sample ID. No.RDC-07 RDC-07 RDC-07Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 19 22 24
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
MTBE ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/KgBenzene ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
Toluene ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
Ethylbenzene ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kgm/p-Xylene ND 10 ug/Kg 1.3 0.5 ug/Kg 1.2 0.5 ug/Kg
o-Xylene ND 10 ug/Kg 0.7 0.5 ug/Kg 0.7 0.5 ug/Kg
1,2,4-Trimethylbenzene ND 10 ug/Kg 7.5 0.5 ug/Kg 9.3 0.5 ug/KgNaphthalene 11 10 ug/Kg 7.6 0.5 ug/Kg 9.9 0.5 ug/Kg
TVPH ND 10 mg/Kg 0.6 0.5 mg/Kg 0.8 0.5 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 100 84 86
d8-Toluene 106 97 99
p-Bromofluorobenzene 107 93 95
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-07 RDC-07 RDC-07 RDC-0711/9/2022 11/9/2022 11/9/2022 11/9/2022
27 29 32 34
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg ND 50 ug/KgND0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg ND 50 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 50 ug/Kg 48 50 ug/Kg J1.1 0.5 ug/Kg 1.1 0.5 ug/Kg ND 50 ug/Kg 350 50 ug/Kg
0.9 0.5 ug/Kg 0.6 0.5 ug/Kg ND 50 ug/Kg 260 50 ug/Kg
5.5 0.5 ug/Kg 2.4 0.5 ug/Kg 290 50 ug/Kg 4800 50 ug/Kg1.8 0.5 ug/Kg 11 0.5 ug/Kg 1600 50 ug/Kg 1200 50 ug/Kg
0.7 0.5 mg/Kg 0.6 0.5 mg/Kg 48 50 mg/Kg J 110 50 mg/Kg
85 78 97 96
97 95 105 104
95 93 106 110
Sample ID. No.RDC-07 RDC-07 RDC-07Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 36 38 40
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 50 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
MTBE ND 50 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
1,2-Dichloroethane ND 50 ug/Kg ND 0.5 ug/Kg ND 25 ug/KgBenzene ND 50 ug/Kg 3.9 0.5 ug/Kg ND 25 ug/Kg
Toluene ND 50 ug/Kg 2.5 0.5 ug/Kg 100 25 ug/Kg
Ethylbenzene ND 50 ug/Kg 4.1 0.5 ug/Kg 1700 25 ug/Kgm/p-Xylene ND 50 ug/Kg 15 0.5 ug/Kg 6900 25 ug/Kg
o-Xylene ND 50 ug/Kg 9.8 0.5 ug/Kg 3000 25 ug/Kg
1,2,4-Trimethylbenzene 590 50 ug/Kg 13 0.5 ug/Kg 10500 25 ug/KgNaphthalene 310 50 ug/Kg 5.6 0.5 ug/Kg 1600 25 ug/Kg
TVPH 35 50 mg/Kg J 0.6 0.5 mg/Kg 240 25 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 96 68 100
d8-Toluene 105 96 103
p-Bromofluorobenzene 108 91 112
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-07 RDC-07 RDC-07 RDC-0711/9/2022 11/9/2022 11/9/2022 11/9/2022
42 44 46 48
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 25 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
ND 25 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 25 ug/Kg
ND 25 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 25 ug/KgND25ug/Kg ND 0.5 ug/Kg 410 0.5 ug/Kg 330 25 ug/Kg
ND 25 ug/Kg 0.7 0.5 ug/Kg 15 0.5 ug/Kg ND 25 ug/Kg
ND 25 ug/Kg 0.8 0.5 ug/Kg 73 0.5 ug/Kg 60 25 ug/Kg3125ug/Kg 2.8 0.5 ug/Kg 230 0.5 ug/Kg 210 25 ug/Kg
ND 25 ug/Kg 1.4 0.5 ug/Kg 110 0.5 ug/Kg 80 25 ug/Kg
77 25 ug/Kg 3.9 0.5 ug/Kg 54 0.5 ug/Kg 47 25 ug/Kg6125ug/Kg 41 0.5 ug/Kg 53 0.5 ug/Kg ND 25 ug/Kg
ND 25 mg/Kg 1.5 0.5 mg/Kg 3 0.5 mg/Kg ND 25 mg/Kg
99 85 86 101
103 104 101 103
109 98 100 107
Sample ID. No.RDC-07Date Sampled 11/9/2022
Sample Depth 50
Reporting Limit Units Flags
Dimethyl Sulfide ND 0.5 ug/Kg
MTBE ND 0.5 ug/Kg
1,2-Dichloroethane ND 0.5 ug/KgBenzene 5.2 0.5 ug/Kg
Toluene 3.1 0.5 ug/Kg
Ethylbenzene 5.4 0.5 ug/Kgm/p-Xylene 18 0.5 ug/Kg
o-Xylene 11 0.5 ug/Kg
1,2,4-Trimethylbenzene 11 0.5 ug/KgNaphthalene 13 0.5 ug/Kg
TVPH ND 0.5 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 65
d8-Toluene 93
p-Bromofluorobenzene 95
Sample ID. No.RDC-08 RDC-08 RDC-08Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 12 14 18
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg
MTBE ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/KgBenzene ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg
Toluene ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg
Ethylbenzene ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kgm/p-Xylene ND 10 ug/Kg ND 10 ug/Kg 1.4 0.5 ug/Kg
o-Xylene ND 10 ug/Kg ND 10 ug/Kg 0.8 0.5 ug/Kg
1,2,4-Trimethylbenzene ND 10 ug/Kg ND 10 ug/Kg 1.3 0.5 ug/KgNaphthalene ND 10 ug/Kg ND 10 ug/Kg 1.6 0.5 ug/Kg
TVPH ND 10 mg/Kg ND 10 mg/Kg 0.6 0.5 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 97 97 75
d8-Toluene 104 104 95
p-Bromofluorobenzene 104 104 96
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-08 RDC-08 RDC-08 RDC-0811/9/2022 11/9/2022 11/9/2022 11/9/2022
20 22 24 26
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/KgND10ug/Kg ND 10 ug/Kg 0.7 0.5 ug/Kg 0.6 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg 1 0.5 ug/Kg 1.7 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg 1.7 0.5 ug/Kg 3.2 0.5 ug/KgND10ug/Kg ND 10 ug/Kg 6.4 0.5 ug/Kg 11 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg 3.7 0.5 ug/Kg 6.1 0.5 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg 6.1 0.5 ug/Kg 12 0.5 ug/KgND10ug/Kg ND 10 ug/Kg 6.4 0.5 ug/Kg 12 0.5 ug/Kg
ND 10 mg/Kg ND 10 mg/Kg 0.6 0.5 mg/Kg 0.7 0.5 mg/Kg
87 96 61 73
103 103 94 97
107 105 98 100
Sample ID. No.RDC-08 RDC-08 RDC-08Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 28 30 33
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
MTBE ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
1,2-Dichloroethane ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/KgBenzene ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
Toluene ND 0.5 ug/Kg 1 0.5 ug/Kg 6 0.5 ug/Kg
Ethylbenzene 0.9 0.5 ug/Kg 1.5 0.5 ug/Kg 7.9 0.5 ug/Kgm/p-Xylene 2.7 0.5 ug/Kg 4.5 0.5 ug/Kg 22 0.5 ug/Kg
o-Xylene 1.6 0.5 ug/Kg 2.6 0.5 ug/Kg 15 0.5 ug/Kg
1,2,4-Trimethylbenzene 4 0.5 ug/Kg 5.6 0.5 ug/Kg 10 0.5 ug/KgNaphthalene 5.3 0.5 ug/Kg 15 0.5 ug/Kg 6.5 0.5 ug/Kg
TVPH 1 0.5 mg/Kg 0.7 0.5 mg/Kg 1.2 0.5 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 80 65 74
d8-Toluene 95 96 98
p-Bromofluorobenzene 93 98 94
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-08 RDC-08 RDC-08 RDC-0811/9/2022 11/9/2022 11/9/2022 11/9/2022
35 36 38 40
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg
ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg ND 0.5 ug/Kg0.5 0.5 ug/Kg 1.2 0.5 ug/Kg 2.6 0.5 ug/Kg 2.3 0.5 ug/Kg
7.1 0.5 ug/Kg 18 0.5 ug/Kg 22 0.5 ug/Kg 24 0.5 ug/Kg
9.8 0.5 ug/Kg 18 0.5 ug/Kg 17 0.5 ug/Kg 26 0.5 ug/Kg280.5 ug/Kg 50 0.5 ug/Kg 44 0.5 ug/Kg 71 0.5 ug/Kg
19 0.5 ug/Kg 34 0.5 ug/Kg 30 0.5 ug/Kg 50 0.5 ug/Kg
15 0.5 ug/Kg 19 0.5 ug/Kg 16 0.5 ug/Kg 28 0.5 ug/Kg120.5 ug/Kg 16 0.5 ug/Kg 11 0.5 ug/Kg 9.7 0.5 ug/Kg
1.3 0.5 mg/Kg 1.1 0.5 mg/Kg 1.1 0.5 mg/Kg 1.3 0.5 mg/Kg
77 71 67 72
98 97 97 98
93 100 116 122
Sample ID. No.RDC-08 RDC-08 RDC-08Date Sampled 11/9/2022 11/9/2022 11/9/2022
Sample Depth 42 44 46
Reporting Limit Units Flags
Reporting Limit Units Flags
Reporting Limit Units Flags
Dimethyl Sulfide ND 10 ug/Kg ND 50 ug/Kg ND 10 ug/Kg
MTBE ND 10 ug/Kg ND 50 ug/Kg ND 10 ug/Kg
1,2-Dichloroethane ND 10 ug/Kg ND 50 ug/Kg ND 10 ug/KgBenzene 110 10 ug/Kg ND 50 ug/Kg 640 10 ug/Kg
Toluene 12800 100 ug/Kg 16800 50 ug/Kg 2000 10 ug/Kg
Ethylbenzene 11800 100 ug/Kg 41800 250 ug/Kg 550 10 ug/Kgm/p-Xylene 33800 100 ug/Kg 117000 250 ug/Kg 1700 10 ug/Kg
o-Xylene 14200 100 ug/Kg 45300 50 ug/Kg 710 10 ug/Kg
1,2,4-Trimethylbenzene 21300 100 ug/Kg 77300 250 ug/Kg 770 10 ug/KgNaphthalene 4000 10 ug/Kg 14400 50 ug/Kg 300 10 ug/Kg
TVPH 870 100 mg/Kg 3600 250 mg/Kg 46 10 mg/Kg
% Surrogate Recovery1,2-Dichloroethane-d4 90 97 92
d8-Toluene 95 95 106
p-Bromofluorobenzene 127 120 107
Sample ID. No.Date Sampled
Sample Depth

Dimethyl Sulfide
MTBE
1,2-Dichloroethane Benzene
Toluene
Ethylbenzene m/p-Xylene
o-Xylene
1,2,4-Trimethylbenzene Naphthalene
TVPH
% Surrogate Recovery1,2-Dichloroethane-d4
d8-Toluene
p-Bromofluorobenzene
RDC-08 RDC-0811/9/2022 11/9/2022
48 50
Reporting Limit Units Flags
Reporting Limit Units Flags
ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg52010ug/Kg 920 10 ug/Kg
18 10 ug/Kg 13 10 ug/Kg
ND 10 ug/Kg ND 10 ug/Kg2710ug/Kg 16 10 ug/Kg
13 10 ug/Kg ND 10 ug/Kg
17 10 ug/Kg 10 10 ug/Kg2910ug/Kg 20 10 ug/Kg
8.9 10 mg/Kg J 9.1 10 mg/Kg J
90 93
103 102
105 106

Attachment B
Soil Boring Logs

48
44
40
36
32
28
24
20
16
12
8
4
0
50
90
100
80
100
100
100
100
100
100
MH
GW
MH
ML
GM Silt, sand and coarse gravel
Red silt, low plasticity with gray mottling. Weathered
rock at 19.5'
Light gray/brown and reddish pink meta volcanic saprolite. Horizontal foliation present 22'-25'
Light brown saprolite, fine, well sorted gravel at 30'.
PWR; Light gray, poorly sorted gravel with cobbles.
Light brown saprolite, very soft silt. Moist at 40'. Horizontal to vertical foliation present 45'-46'.
Refusal @ 46'
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3230
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-01
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
46'
AST Environmental Inc.Project No.Page 1 of 15152367
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40
36
32
28
24
20
16
12
8
4
0
50
80
100
100
100
100
100
100
100
50
MH
ML
GM Silt, sand and coarse gravel
Red silt, low plasticity with gray mottling. Tan mottling
and softer at 10'
Tan silt with gray mottling, very soft. High plastiicty.
Slight metamorphic structure present at 24'
Light brown, silt, moderate to high plasiticty, PWR at
27.5'-28'.
Saprolite, light brown with horizontal white foliation,
moist. Soft, moderate plasticity. PWR at 33-34'.
Vertical fracture in saprolite present from 36.5'-37'. PWR layers, gravel and cobble, frequent from 37'-50'
Boring Terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3231
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-02
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
50'
AST Environmental Inc.Project No.Page 1 of 15152367
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40
36
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28
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20
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12
8
4
0
80
100
100
100
100
100
50
100
100
100
MH
GW
MH
ML Red silt, dry, stiff
Red and gray meta saprolite, horizontal foliation present. Very soft at 10'. PWR at 22'
Reddish brown silt with horizontal to vertical foliation
present. PWR at 25'
PWR. Light gray silt and sand, with gravel. Gravel
and cobble layer at 32'
Light br to gray clay and silt saprolite, meta structure
present. Sand & gravel lense at 43'. Gray PWR at 50'
Boring Terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3232
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-03
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
50'
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100
100
100
100
MH
ML Red silt, dry, weathered rock
Red and white meta saprolite, very soft. PWR from 19'-20'
Light gray silt and sand, with gravel. Weathered PWR
layers at 27', 28', 29.5'. Gravel seam at 33'
Light br to gray clay and silt saprolite, meta structure present. PWR lense at 42'. Gray PWR at 46'
Boring Terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3233
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-04
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
50'
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100
100
100 CH
SM
ML Red silt, dry, stiff, weatherd rock/gravel form 18'-20'
Light brown silt, gravel throughout. Meta saprolite structure present starting at 32'. Wet at 35'
Dark brown to gray clay, high plasticity, soft
Boring Terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3234
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-05
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
50'
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5
MH
ML Red silt, dry, weathered rock
Red silt, saprolite, white feldspar foliation, soft. Weathered quartz lens from 23'-24'
Tan/light brown meta saprolite, weathered rock throughout. Gravel seam at 32'-32.5'
Refusal at 41'
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3235
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-06
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
41'
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SM
GM
MH
ML Red silt, stiff
Red meta saprolite, horizontal foliation with feldspar
and quartz seams. Subm vertical weatherd veins at
17'
Reddish brown silt with sand and gravel. Gravel lense
at 29.2'
Tan meta saprolite, PWR gravel and cobbles at 33.5.
Feldspar veinat 39'
Gray silty clay, high plasticity. PWR at 43'
Boring terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3236
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-07
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 8, 2022
November 8, 2022
50'
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MH
Red silt, very soft
Red/tan meta saprolite. Coarse gravel/cobbles at 29.5'
Lt brown saprolite, very soft, wet. Dark gray, very stiff
at 49'
Boring terminated
DESCRIPTION
NAME (USCS): color, sorting, plasticity,
moisture, grain size, packing
NCDEQ - McCain Grocery
GEX
Direct Push
Geoprobe 3237
3.75 Dual Tube
Nathan Thacker
Nathan Thacker
RDC-08
REC-OVERY(%)LAB I.D.DEPTH(feet)WELL CONSTRUCTION
DETAILS AND/OR
DRILLING REMARKS
PID READING(ppm)
PROJECT MANAGER:
PROJECT:
BORING IDENTIFICATION:
DRILLING CONTRACTOR:
DRILLING METHOD:
SAMPLING METHOD:
DRILLING EQUIPMENT:
REG. NO.
LOGGED BY:
DEPTH TO WATER:CASING:
TOTAL DEPTH:SCREEN INTERVAL:
DATE FINISHED:
DATE STARTED:
NORTHING:
EASTING:
ELEVATION:
November 9, 2022
November 9, 2022
50'
AST Environmental Inc.Project No.Page 1 of 15152367

Attachment C
BOS 200 Injection Design

Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Area A
MW-1R
Site Information Predominate Geology of Treatment Zone
Treatment Zone Area (ft^2)1,400 1,400
Contamination Depth Start (ft bgs)30.0
Contamination Depth End (ft bgs)50.0
Treatment Volume (yd^3)1,037.0 1,037
Triangular Grid Spacing (ft)7.5
Number of Injection Points - Design 25 25
Injection Interval Distance (ft)1.5
Number of Injection Intervals per Point - Design 13.5
Total Number of Injection Intervals 338 338
Effective Porosity 30%
Pore Volume (L)237,888
Soil Density (lb/ft^3)110
Speciated COC Design Calculations Contaminant of Concern Benzene
Design Basis Soil (mg/kg) or Groundwater (mg/L)Groundwater
Design Concentration 9.500
Design Endpoint (Interim)1.000
Contaminant of Concern Mass Loading (lb/ft^3)1.78E-04
BOS 200 per Injection Interval - Design (lb)50
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)675
BOS 200 Total (lb)16,875 16,900
TPH Design Calculations TPH Groundwater Concentration (mg/L)50
TPH Soil Concentration (mg/kg)9,500
TPH Mass (lb)29,347
BOS 200 Total Demand (lb)52,825
BOS 200 per Injection Interval - Design (lb)150
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)2,025
BOS 200 Total (lb)50,625 50,650
Design Basis Select Speciated or TPH Speciated
Design BOS 200 Total per Area (lb)16,875 16,900
Trap & Treat Bacteria Calculations Bacteria Concentrate (gal)34 35
Kinetic Design Additives Supplemental Gypsum per Interval - Design (lb)25
Total Supplemental Gypsum (lb)8,438 8,450
Supplemental Magnesium Sulfate per Interval - Design (lb)25
Total Supplemental Magnesium Sulfate (lb)8,438 8,450
Food Grade Starch per Interval (lb)12.5
Total Food Grade Starch (lb)4,219 4,250
Yeast Extract per Interval (lb)0.33
Total Yeast Extract (lb)112 165
Slurry and Water Volumes Slurry Volume per Interval (gal)25
Estimated Water Volume (gal)8,438 8,438
Totals
3/2/2023
Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Summary BOS 200 Total (lb)16,900
BOS 200 Unit Price ($/lb)$5.25
Bacteria Concentrate (gal)35
Bacteria Concentrate Price ($/gal, per RPI website)$115
Supplemental Gypsum Total (lb)8,450
Gypsum Unit Price ($/lb)$0.50
Magnesium Sulfate Total (lb)8,450
Magnesium Sulfate Unit Price ($/lb)$0.60
Food Grade Starch Total (lb)4,250
Food Grade Starch Unit Price ($/lb)$0.50
Yeast Extract Total (lb)165
Yeast Extract Unit Price ($/lb)$13.50
Estimated Shipping and Tax ($/lb)$0.35
Total Material Price ($)$112,313
Number of Field Days to Complete 9
Mobilization ($)$4,500
Injection Location Markout ($)
Total Installation Price ($)$72,000
Estimated RDC Price ($)
Total Estimated Price ($)$184,313
3/2/2023
Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Area B
RDC-07/RDC-08
Site Information Predominate Geology of Treatment Zone
Treatment Zone Area (ft^2)800 800
Contamination Depth Start (ft bgs)36.0
Contamination Depth End (ft bgs)50.0
Treatment Volume (yd^3)414.8 415
Triangular Grid Spacing (ft)7.5
Number of Injection Points - Design 14 14
Injection Interval Distance (ft)1.5
Number of Injection Intervals per Point - Design 10.0
Total Number of Injection Intervals 140 140
Effective Porosity 30%
Pore Volume (L)95,155
Soil Density (lb/ft^3)110
Speciated COC Design Calculations Contaminant of Concern Benzene
Design Basis Soil (mg/kg) or Groundwater (mg/L)Groundwater
Design Concentration 2.000
Design Endpoint (Interim)0.050
Contaminant of Concern Mass Loading (lb/ft^3)3.74E-05
BOS 200 per Injection Interval - Design (lb)50
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)500
BOS 200 Total (lb)7,000 7,000
TPH Design Calculations TPH Groundwater Concentration (mg/L)50
TPH Soil Concentration (mg/kg)3,600
TPH Mass (lb)4,455
BOS 200 Total Demand (lb)8,019
BOS 200 per Injection Interval - Design (lb)60
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)600
BOS 200 Total (lb)8,400 8,400
Design Basis Select Speciated or TPH Speciated
Design BOS 200 Total per Area (lb)7,000 7,000
Trap & Treat Bacteria Calculations Bacteria Concentrate (gal)14 15
Kinetic Design Additives Supplemental Gypsum per Interval - Design (lb)25
Total Supplemental Gypsum (lb)3,500 3,500
Supplemental Magnesium Sulfate per Interval - Design (lb)25
Total Supplemental Magnesium Sulfate (lb)3,500 3,500
Food Grade Starch per Interval (lb)12.5
Total Food Grade Starch (lb)1,750 1,750
Yeast Extract per Interval (lb)0.33
Total Yeast Extract (lb)46 55
Slurry and Water Volumes Slurry Volume per Interval (gal)25
Estimated Water Volume (gal)3,500 3,500
Totals
3/2/2023
Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Summary BOS 200 Total (lb)7,000
BOS 200 Unit Price ($/lb, per RPI website)$5.25
Bacteria Concentrate (gal)15
Bacteria Concentrate Price ($/gal, per RPI website)$115
Supplemental Gypsum Total (lb)3,500
Gypsum Unit Price ($/lb)$0.50
Magnesium Sulfate Total (lb)3,500
Magnesium Sulfate Unit Price ($/lb)$0.60
Food Grade Starch Total (lb)1,750
Food Grade Starch Unit Price ($/lb)$0.50
Yeast Extract Total (lb)55
Yeast Extract Unit Price ($/lb)$13.50
Estimated Shipping and Tax ($/lb)$0.35
Total Material Price ($)$46,393
Number of Field Days to Complete 5
Mobilization ($)$4,500
Injection Location Markout ($)
Total Installation Price ($)$42,000
Total Estimated Price ($)$88,393
3/2/2023
Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Area C
MW-6
Site Information Predominate Geology of Treatment Zone Fill/Clay
Treatment Zone Area (ft^2)1,595 1,595
Contamination Depth Start (ft bgs)42.0
Contamination Depth End (ft bgs)50.0
Treatment Volume (yd^3)472.6 473
Triangular Grid Spacing (ft)7.5
Number of Injection Points - Design 28 28
Injection Interval Distance (ft)1.5
Number of Injection Intervals per Point - Design 6.0
Total Number of Injection Intervals 168 168
Effective Porosity 30%
Pore Volume (L)108,409
Soil Density (lb/ft^3)110
Speciated COC Design Calculations Contaminant of Concern Benzene
Design Basis Soil (mg/kg) or Groundwater (mg/L)Groundwater
Design Concentration 2.500
Design Endpoint 0.010
Contaminant of Concern Mass Loading (lb/ft^3)4.68E-05
BOS 200 per Injection Interval - Design (lb)50
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)300
BOS 200 Total (lb)8,400 8,400
TPH Design Calculations TPH Groundwater Concentration (mg/L)10
TPH Soil Concentration (mg/kg)70
TPH Mass (lb)101
BOS 200 Total Demand (lb)182
BOS 200 per Injection Interval - Design (lb)25
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)150
BOS 200 Total (lb)4,200 4,200
Design Basis Select Speciated or TPH Speciated
Design BOS 200 Total per Area (lb)8,400 8,400
Trap & Treat Bacteria Calculations Bacteria Concentrate (gal)17 20
Slurry and Water Volumes Slurry Volume per Interval (gal)25
Estimated Water Volume (gal)4,200 4,200
Summary BOS 200 Total (lb)8,400
BOS 200 Unit Price ($, per RPI website)$5.25
Bacteria Concentrate (gal)20
Bacteria Concentrate Price ($, per RPI website)$115.00
Estimated Shipping and Tax ($/lb)$0.35
Total Material Price ($)$49,340
Number of Field Days to Complete 5
Mobilization ($)$4,500
Injection Location Markout ($)
Total Installation Price ($)$42,000
Total Estimated Price ($)$91,340
Totals
3/2/2023
Client Name NCDEQ
Project Location McCain Grocery, Waxhaw, NC
Area D
MW-2
Site Information Predominate Geology of Treatment Zone Saprolite
Treatment Zone Area (ft^2)2,400 2,400
Contamination Depth Start (ft bgs)35.0
Contamination Depth End (ft bgs)45.0
Treatment Volume (yd^3)888.9 889
Triangular Grid Spacing (ft)7.5
Number of Injection Points - Design 43 43
Injection Interval Distance (ft)1.5
Number of Injection Intervals per Point - Design 7.5
Total Number of Injection Intervals 323 323
Effective Porosity 30%
Pore Volume (L)203,904
Soil Density (lb/ft^3)110
Speciated COC Design Calculations Contaminant of Concern Benzene
Design Basis Soil (mg/kg) or Groundwater (mg/L)Groundwater
Design Concentration 0.089
Design Endpoint 0.001
Contaminant of Concern Mass Loading (lb/ft^3)1.67E-06
BOS 200 per Injection Interval - Design (lb)25
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)188
BOS 200 Total (lb)8,063 8,100
TPH Design Calculations TPH Groundwater Concentration (mg/L)5
TPH Soil Concentration (mg/kg)80
TPH Mass (lb)214
BOS 200 Total Demand (lb)385
BOS 200 per Injection Interval - Design (lb)25
BOS 200 Slurry Volume per Interval (gal)25
Average BOS 200 per Injection Point (lb)188
BOS 200 Total (lb)8,063 8,100
Design Basis Select Speciated or TPH Speciated
Design BOS 200 Total per Area (lb)8,063 8,100
Trap & Treat Bacteria Calculations Bacteria Concentrate (gal)16 20
Slurry and Water Volumes Slurry Volume per Interval (gal)25
Estimated Water Volume (gal)8,063 8,063
Summary BOS 200 Total (lb)8,100
BOS 200 Unit Price ($, per RPI website)$5.25
Bacteria Concentrate (gal)20
Bacteria Concentrate Price ($, per RPI website)$115.00
Estimated Shipping and Tax ($/lb)$0.35
Total Material Price ($)$47,660
Number of Field Days to Complete 7
Mobilization ($)$4,500
Injection Location Markout ($)
Total Installation Price ($)$57,000
Total Estimated Price ($)$104,660
Totals
3/2/2023