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HomeMy WebLinkAboutWI0400553_Permit (Issuance)_20200729NC Department of Environmental Quality — Division of Water Resources (DWR) NOTIFICATION OF INTENT (NOI) TO CONSTRUCT OR OPERATE INJECTION WELLS The following are `permitted by rule" and do not require an individualpermit when constructed in accordance with the rules of 15A NCAC 02C.0200 (NOTE: This form must be received at least 14 DAYS prior to injection) AQUIFER TEST WELLS (15A NCAC 02C .0220) These wells are used to inject uncontaminated fluid into an aquifer to determine aquifer hydraulic characteristics. IN SITU REMEDIATION (15A NCAC 02C .02251 or TRACER WELLS (15A NCAC 02C .0229): 1) Passive Injection Systems - In -well delivery systems to diffuse injectants into the subsurface. Examples include ORC socks, iSOC systems, and other gas infusion methods (Note: Injection Event Records (IER) do not need to be submitted for replacement of each sock used in ORC systems). 2) Small -Scale Injection Operations — Injection wells located within a land surface area not to exceed 10,000 square feet for the purpose of soil or groundwater remediation or tracer tests. An individual permit shall be required for test or treatment areas exceeding 10,000 square feet. 3) Pilot Tests - Preliminary studies conducted for the purpose of evaluating the technical feasibility of a remediation strategy in order to develop a full scale remediation plan for future implementation, and where the surface area of the injection zone wells is located within an area that does not exceed five percent of the land surface above the known extent of groundwater contamination. An individual permit shall be required to conduct more than one pilot test on any separate groundwater contaminant plume. 4) Air Injection Wells - Used to inject ambient air to enhance in -situ treatment of soil or groundwater. 5) In -Situ Thermal Wells (IST) — Used to `heat' contaminated groundwater to enhance remediation. Print Clearly or Type Information. Illegible Submittals Will Be Returned as Incomplete. DATE: , 20 PERMIT NO. W 10400553 (to be filled in by DWR) NOTE- If this NOI is being submitted as notification of a modification of a previously issued NOI for this site (e.g., different injection wells, plume, additives, etc.) and still meets the deemed permitted by rule criteria, provide the previously assigned permit tracking number and any needed relevant information to assess and approve injection: Permit No. Issued Date: A. WELL TYPE TO BE CONSTRUCTED OR OPERATED (1) Air Injection Well ....................................... Complete sections B through F, J, M (2) Aquifer Test Well ....................................... Complete sections B through F, J, M (3) Passive Injection System ............................... Complete sections B through F, H-M (4) Small -Scale Injection Operation ...................... Complete sections B through M (5) XXXXX Pilot Test ................................................. Complete sections B through M (6) Tracer Injection Well ................................... Complete sections B through M (7) In -Situ Thermal (IST) Well ........................... Complete sections B through M B. STATUS OF WELL OWNER: State Government Deemed Permitted GW Remediation NOI Rev. 2-17-2020 Page 1 C. WELL OWNER(S) — State name of Business/Agency, and Name and Title of person delegated authority to sign on behalf of the business or agency: Name(s): NCDEQ, DWM, UST Section -Federal & State Lead Program (TF# 30236) Mailing Address: 1646 Mail Service Center City: Raleigh State: NC Zip Code: 27699-1646 County: WAKE Day Tele No.: 919-707-8166 Cell No.: EMAIL Address: Sharon.Ghiold(a-)ncdenr.gov Fax No.: D. PROPERTY OWNER(S) (if different than well owner/applicant) Name and Title: Harold Reynolds, Property Owner Company Name N/A Mailing Address: 3900 McConnell Road 919-571-4718 City: Greensboro State: �NC_ Zip Code: 27406 County: Guilford Day Tele No.: 336-707-3907 Cell No.: N/A EMAIL Address: N/A Fax No.: N/A E. PROJECT CONTACT (Typically Environmental Consulting/Engineering Firm) F. G. Name and Title: Kevin Buchanan Company Name WithersRavenel, Inc. Mailing Address: 115 MacKenan Drive City: Cary State: NC Zip Code: 27511 County: WAKE Day Tele No.: 919-469-3340 Cell No.: 919-422-1141 EMAIL Address: kbuchanan&withersravenel.com PHYSICAL LOCATION OF WELL SITE Fax No.: 919-467-6008 (1) Facility Name & Address: (Former) Caviness Grocery 3904 McConnell Road City: Greensboro County: Guilford Zip Code: 27405 (2) Geographic Coordinates: Latitude": " or ° Longitude": ° if or ° Reference Datum: Accuracy: Method of Collection: "FOR AIR INJECTION AND AQUIFER TEST WELLS ONLY: A FACILITY SITE MAP WITH PROPERTY BOUNDARIES MAY BE SUBMITTED IN LIEU OF GEOGRAPHIC COORDINATES. TREATMENT AREA Land surface area of contaminant plume: 4,000 square feet Land surface area of inj. well network: < 500 square feet (< 10,000 W for small-scale injections) Percent of contaminant plume area to be treated: —10% (must be < 5% of plume for pilot test injections) Deemed Permitted GW Remediation NOI Rev. 2-17-2020 Page 2 H. I. J. K. INJECTION ZONE MAPS — Attach the following to the notification. (1) Contaminant plume map(s) with isoconcentration lines that show the horizontal extent of the contaminant plume in soil and groundwater, existing and proposed monitoring wells, and existing and proposed injection wells; and (2) Cross-section(s) to the known or projected depth of contamination that show the horizontal and vertical extent of the contaminant plume in soil and groundwater, changes in lithology, existing and proposed monitoring wells, and existing and proposed injection wells. (3) Potentiometric surface map(s) indicating the rate and direction of groundwater movement, plus existing and proposed wells. DESCRIPTION OF PROPOSED INJECTION ACTIVITIES AT THE SITE — Provide a brief narrative regarding the cause of the contamination, and purpose, scope, goals of the proposed injection activity: Pumose: Reduction of Gross Contaminant Level concentrations of petroleum compounds. Scope: Injection of Re,genesis PersulfOx through GeoProbe tooling into a total of seven (7) injection points with target volumes of 450 gallons point (gpprox. 3,150 gallons total injection volume) WELL CONSTRUCTION DATA (1) No. of injection wells: Proposed Existing (provide NC Well Construction Record (GW-1) for each well) (2) Appx. injection depths (BLS): 25-40 (3) For Proposed wells or Existing wells not having GW-Is, provide well construction details for each injection well in a diagram or table format. A single diagram or line in a table can be used for multiple wells with the same construction details. Well construction details shall include the following (indicate if construction is proposed or as -built): (a) Well type as permanent, Geoprobe/DPT, or subsurface distribution infiltration gallery (b) Depth below land surface of casing, each grout type and depth, screen, and sand pack (c) Well contractor name and certification number INJECTION SUMMARY NOTE: Onlv iniectants annroved by the enidemiologv section of the NC Division ofPublic Health. Department of Health and Human Services can be infected. Approved iniectants can be found online at http:Hdeg.nc. gov/about/divisions/water-resources/water-resources-permits/wastewater-branch/ground-water- protection/ground-water-approved-injectants. All other substances must be reviewed by the DHHSprior to use. Contact the UIC Program for more info if you wish to get approval° or a different additive. However, please note it may take 3 months or longer. If no iniectants are to be used use N/A. Injectant: Regenesis PersulfOx Total Amt. to be injected (gal)/event: 3,150 Injectant: Total Amt. to be injected (gal)/event: Injectant: Total Amt. to be injected (gal)/event: Deemed Permitted GW Remediation NOI Rev. 2-17-2020 Page 3 Injectant: Total Amt. to be injected (gal)/event: Injectant: Total Amt. to be injected (gal)/ Total Amt. to be injected (gal/event): 150 No. of separate injection events: I Total Amt. to be injected (gal): 3,150 Source of Water (if applicable): City of Greensboro Municipal Supply L. MONITORING PLAN — Describe below or in separate attachment a monitoring plan to be used to determine if violations of groundwater quality standards specified in Subchapter 02L result from the injection activity. After completion of pilot scale injection, WR proposes a groundwater sampling event at the site after three - weeks' time to determine whether the injection of material has had the desired effect (e.g., reduction of petroleum contaminants in smear zone and groundwater of the site). Based on results of pilot scale injection, WR will recommend a full-scale injection event at the facility. M. SIGNATURE OF APPLICANT AND PROPERTY OWNER Well Owner/Applicant: `I hereby certify, under penalty of law, that I am familiar with the information submitted in this document and all attachments thereto and that, based on my inquiry of those individuals immediately responsible for obtaining said information, I believe that the information is true, accurate and complete. I am aware that there are significant penalties, including the possibility of fines and imprisonment, for submitting false information. I agree to construct, operate, maintain, repair, and if applicable, abandon the injection well and all related appurtenances in accordance with the I5A NCAC 02C 0200 Rules. " Kevin B. Buchanan, Project Manager, WithersRavenel, on behalf of NCDEQ-DWM, UST Section for TF#30236 Signature of Applicant Print or Type Full Name and Title Property Owner (if the property is not owned by the Well Owner/Applicant): "As owner of the property on which the injection well(s) are to be constructed and operated, I hereby consent to allow the applicant to construct each injection well as outlined in this application and agree that it shall be the responsibility of the applicant to ensure that the injection well(s) conform to the Well Construction Standards (I SA NCAC 02C C. 0200). " "Owner" means any person who holds the fee or other property rights in the well being constructed. A well is real property and its construction on land shall be deemed to vest ownership in the land owner, in the absence of contrary agreement in writing. SEE ATTACHED NCDEQ STATE -LEAD ACCESS AGREEMENT FOR PROPERTY Signature* of Property Owner (if different from applicant) Print or Type Full Name and Title *An access agreement between the applicant and property owner may be submitted in lieu of a signature on this form. Please send 1 (one) hard color copy of this NOI along with a copy on an attached CD or Flash Drive at least two (2) weeks prior to injection to: DWR — UIC Program 1636 Mail Service Center Raleigh, NC 27699-1636 Telephone: (919) 707-9000 Deemed Permitted GW Remediation NOI Rev. 2-17-2020 Page 4 Sharon Ghiold DWM UST Section 1637 Mail Service Ctr Raleigh, NC 27699-163 7 Dear Ms. Ghiold: RE: Site Access Agreement Caviness Grocery 3904 McConnell Road Greensboro, Guilford Codnty,�NC— % WSRO ,z t .. `- incident #30236 Risk/Rank: High H260D 2015 SP 14 Pr l 3: 1 I am/We are the owner(s) of a paictl Of property, localiiil at or near the incident in question, and hereby permit the Department of Environment and Natural Resources (Department) or its contractor to enter upon said property for the purpose of conducting an investigation of the groundwaters under the authority of G.S. 143-215.3(a)2. I am/We are granting permission with the understanding that: The investigation shall be conducted by the UST Section of the Department's Division of Waste Management or its contractor. 2. The costs of construction, ,and maintp►ance ctf the site and access shall be borne by the Department or its contractor. The Department or. its contractor shall protect and prevent damage to the surrounding lands. 3. Unless otherwise agreed, the Department or its contractor shall have access to the site by the shortest feasible route t6 the nearest public'road. ',Thc Department or its contractor may enter upon the land at reasonable times and have full right of access during the period of the investigation. 4. Any claims which may arise against the Department or its contractor shall be governed by Article 31 of Chapter 143 of the North 'Carolina General Statutes, Tort Claims Against State Departments and Agencies, and as otherwise provided by law. 5. The information derived from the investigation shall be made available to the owner upon request and is a public record, in accordance with G.S. 132-1. 6. The activities to be carried out by the Department or its contractor are for the primary benefit of the Department and of the State of North Carolina. Any benefits accruing to the owner are incidental. The Department or its contractor is not and shall not be construed to be an agent, employee, or contractor of the land owner. Caviness Grocery STF #30236 Page 2 I/We agree not to interfere with, remove, or any way damage the Department's well(s) or its contractor's wells) and equipment during the investigation. Signatur R FV"-49 Type/Print Name of Own or Agent Phone Number Address /!"t 2-74406 City/State/Zip Code 9-g --A d1.s Date %0 WithersRavenel NoOur People. Your Success. WELL CONSTRUCTION LOG Boring ID: TBD MW-1 Job Name: Caviness Grocery Job #: 02170214.09 Date: July 21, 2020 Site Loc.: Greensboro, NC WR Rep: Matthew James Driller: SAEDACCO, Inc. NC Well Contractor #: 1947 Depth in Soil Description Proposed Injection Point (Typical) Feet (Field USCS Classification) 0 Ground Surface 1 c U a o °' 0 0 c °6 aci E Native Soils c 3 = 0°o m co � 3 a y `6 3 Q J m w 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ° e 29 0,O `o 00 a c c L a 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Notes: GeoProbe DPT Boring (Typical) 1.) Boring to be terminated at 40' BLS 2.) BLS - Below Land Surface = = Historical Groundwater Level (Measured Beneath BLS) Page 1 of 1 ii5 MacKenan Drive Cary, North Carolina 27511 tel.919.469.334o f8x.919.467.6008 www.withersravenel.com 1,500' f d 1,000' - , el 500' S JECT SITE �� �-�. nel Roa, 0.46 ACR S-- I r lk a A r -1% 144 ) GRAPHIC SCALE J 0 250 500 1000 ��r f 1 inch = 500 ft. s 1/ FORMER CAVINESS GROCERY DRAWN BY: SCALE: FIGURENO.: Wi t h e rs R a v e n e l 1 (INCIDENT#30236) MDF 1"=500' 1 / 39McLROAD Engineers I Planners I Surveyors GREENSBORO,GUILFORUILFORDCOUNTY, NC APPROVED BY: DATE: PROJECTNO.: 115 MacKenan Drivel Cary, NC 27511It: 919.469.3340I license#: C-0832I—withemravenel.com GENERAL LOCATION MAP SMB 12/11/17 02170214.09 KN17\17-0210\17021h0o-4IC01111111 - CaNIm eroow En4o\CID\7F302W %-Swban BaN 12112017AA D•aw6mr 11. 2017 - BIICIWWI. KEVIN FORMER PUMP ISLAND FORMER UST AREA {UST #1 & #2) GRAPHIC SCALE 0 5 10 20 1 inch = 10 Ft, LEGEND TYPE II MONITORING WELL NOTES- 1.) 2014 AERIAL OBTAINED FROM THE LOCAL COUNTY GIS DEPARTMENT, uum FORMER UST AREA (UST #3) �I I 1 III f ! I 1 J I r f f MW-3R f I IL■ ■■ FORMER PUMP ISLAND A• MW-2R - Il (BDL* l� 1 fl 2 - 1 � FORMER UST AREA _ (UST #1 & #2) FORMER CAVINESS GROCERY GRAPHIC SCALE 0 5 10 20 1 inch = 10 ft. LEGEND TYPE 11 MONITORING WELL (23,210) TOTAL BTEX CONCENTRATION (uglL) - OW28116 (1,138') TOTAL BTEX CONCENTRATION (uglL) - 01104 (BDL..) NO BTEX COMPOUNDS DETECTED ABOVE LABORATORY METHOD DETECTION LIMITS-12l22115 NOTES: 1. 2014 AERIAL OBTAINED FROM THE LOCAL COUNTY GIS DEPARTMENT- 2. ESTIMATED EXTENT OF TOTAL BTEX IN GROUNDWATER INCLUDES ANALYTICAL DATA FOR SAMPLES OBTAINED ON 0942&16 (MW-1RR AND MW-V),12f9,21S5 [MW-M AND 061211H (MW-4). Aom (19,660) MW-1RR f (23,2301� MW-3R ESTIMATED EXTENT OF BENZENE AT CONCENTRATIONS EXCEEDING GCL ESTIMATED EXTENT OF TOTAL BTEX IN � GROUNDWATER FORMER UST AREA 1 � -7 (UST#3) 1 � I 1 r � ! f� f Il r1 A 1 AD r� z Z VI az o a m J E 0 z z W rQ Q ~ V Q � LA s' z ou c� } uz Q ¢0 N ry J d LLJ I& z �z� > ao5 a 10 u =�0 L'i� mN w a� 0 FORMER PUMP ISLAND ABENZENE A MW-Ra r (BDL" ! f 1 2 f ESTiMATED EXTENT OF AT CONCENTRATIONS B EXCEEDING GCL ESTIMATED EHTENTOF - TOTAL BTEX IN (19,660) GROUNDWATER L~ L MW-1RR FORMERUSTAREA (UST 41 & #2) FORMER UST AREA LEGEND - - - (UST#3) TYPE II MONITORING WELL 1 + 3 1 (23,210) TOTAL BTEX CONCENTRATION (uglL) - 09128/15 (23,210 f + (1,138') TOTAL BTEX CONCENTRATION (uglL) - 8l21104 MW-3R� (BDL") NO BTEX COMPOUNDS DETECTED ABOVE NESS i A' LABORATORY METHOD DETECTION LIMITS-12122115 H NOTES: M W-4 1. 2014 AERIAL OBTAINED FROM THE LOCAL COUNTY GIS DEPARTMENT. 1 (1,138`) 2. ESTIMATED EXTENT OF TOTAL STEX IN GROUNDWATER INCLUDES ANALYTICAL DATA FOR SAMPLES OBTAINED ON OW8116 (MW-1 RR AND MW-3R),12122115 IMW-2Rj AND 08121M4 {MW-0). O �] ` GRAPHICSCALE 0 S 10 0 1 inch =10 ft. 14L1] •ArA a$] 3] cV GROUND SURFACE 681 120 110 100 •. 90 w a ol 1 120 q v o ° p z 1. i 0 0 a � 110 2 I, 1-4 ❑ ❑ ❑ W _ 1-STORY BLOCK BUILDING GROUND SURFACE ¢ 2 100 m -- --��� 2 z Co Y o m a N ESTIMATED EXTENT OF 90 N BENZENE AT LEVELS ABOVE GCLVALUE Z 0 SILT SILK" 2 P C i3U ESTIMATED EXTENT OF $0 m TOTAL BTEX IN GROUNDWATER Z u m m n T 1,13$* 0 Z O SILT Z � n vL B L" 70 U3 O Q a F 70 GROUNDWATER ELEVATION Q u Q m 09/28/16 (MW-IRR- MW-3R) 23,210 0 1 inch =15 ft. 60 C 0 7.5 15 30 HORIZONTAL SCALE L11j � Lu 19,660 N Q Z 60 o C U 110 Cr7 1-STORY BLOCK BUILDING 100 1tt2a �. :1 90 JED EXTENT OF SILT NE AT LEVELS ABOVE SLUE SILT $0 3.) i 1,13$* GROUNDWATER ELEVATION 70 09/28/16(MM W-IRR-W 3R) 19,660 23,210 Pill ESTIMATED EXTENT OF 0 7.5 15 30 50 TOTAL BTEX IN GROUNDWATER — 50 HORIZONTAL SCALE 50 } � U W z u o� o boo a uWr9 i rye° W z 0 Z?z� oLdd z$2° v M m i W no C) C� a > In - ro Ln _ L a � 0� s JJ � - w z C HAW Remedial Cost Proposal To: Withers & Ravenel From: Andy Lowy - Design Specialist alowy@regenesis.com Subject: Design and Cost Estimate Site: Caviness Grocery Greensboro, NC Location: MW-1RR Applicable Product PersulfOx® 0 REGENESIS (610) 655-5259 Link to View/Download Product Information PersulfOx 1/24/2020 REGENESIS is pleased to present you with this design and cost estimate for the proposed treatment at your site utilizing the remediation technologies presented above. Included within this document you will find the following attachments supporting the proposed approach: • Map Depicting Treatment Area • Remedial Design and Cost Estimate • Product Technical Sheet • Standard Assumptions • Terms and Conditions Remedial Approach Regenesis is recommending one application of PersulfOx to chemically oxidize and reduce petroleum mass in MW-1RR as a pilot test. We recommend taking a baseline sample prior to the application and then monthly sampling afterwards for at least the first three months post application. 1UEDAe'& Drilling - Direct Push - Remediatian Services 9088 Northfield Drive Fort Mill, South Carolina 29707 Phone: (803) 548-2180 / Fax: (803) 548-2181 www.saedacco.com PrgnoSal Withers & Ravenel - Cary RE: Former Caviness Grocery - MW-1 RR Core Area 115 MacKenan Drive 3904 McConnell Rd. Cary, NC 27511 Greensboro, NC 27301 Phone: (919) 469-3340 / Fax: Guilford County Email: mjames@withersravenel.com ATTN: Matt James FROM: Jack Byer (jbyer@saedacco.com) Project Date: 1/24/2020 Last Revised Date: 1/24/2020 Job Number: 20200124-1619 description / Unit Quantity Rate Extension Scope of Work : Injection of client provided products at 7 injection points (2-4 GPM with a target volume of 450 gallons/point (MW-1RR Core Area) -approximately 3,150 gallon total injection volume). SAEDACCO will provide all required tanks, pumps, injection tooling and a Geoprobe 7822 DPT rig. No water is available on -site. TRAVEL: Mobilization, each 1 $550.00 $550.00 Per Diem - 3-Man Crew, per day 3 $375.00 $1,125.00 DECONTAMINATION: Steam Cleaner, per day 3 $75.00 Included Decontamination, lump sum 1 $200.00 $200.00 GEOPROBE SERVICES: DPT Track Rig & Crew, per day 3 $1,600.00 $4,800.00 Mixing, Batching & Blending System, per day 3 $450.00 $1,350.00 Grout Abandon DPT Boring, per ft. 280 $2.00 Included OTHER: Water Supply (tanks, pumps, fittings & hoses), per day 3 $50.00 $150.00 Miscellaneous Tools & Equipment, per day 3 $75.00 $225.00 Water Supply, per day 3 $100.00 $300.00 Total Estimated Cost: $8,700.00 Time Estimate - 3 Days Proposal/Project Notes: 1. Client to provide all required permits for injection project. 2. If deemed necessary, client to provide temporary fencing to secure work area. 3. Proposed costs assumes that a water supply location is available on site. SAEDACCO will transport water to the work area. If a permit and fire hydrant connection is needed, SAEDACCO can procure and will pass through expenses related to obtaining the water source. 4. SAEDACCO does not warrant the effectiveness of the injection process and has relied on information provided by client in preparation of the estimate. ACCEPTANCE: SAEDACCO: Name / Title: Name / Title: Date: Date: P.O. Number: SAEDACCO is not liable for any damage to any underground property or utilities as long as the drilling is done at the location indicated by Client field representative and SAEDACCO has not been contracted to locate underground utilities and/or structures. Also, SAEDACCO will not obtain and is not responsible for obtaining any required regulatory well permits unless specially contracted to do so. Client must provide all required well permits before drilling can commence. Monthly Invoices are due and payable on receipt in U.S. dollars. Invoices not paid within 30 days of date of invoice are subject to an interest charge of one and one-half percent (1.5%) on the outstanding balance for each month or portion thereof beyond the thirty day period. 12 4/ 2 030 � REGENESIS Assumptions In generating this design proposal REGENESIS relied upon professional judgment and site specific information provided by others. Using this information as input, we performed calculations based upon known chemical and geologic relationships to generate an estimate of the mass of product and subsurface placement required to affect remediation of the site. The attached design summary tables specify the assumptions used in preparation of this technical design. We request that these modeling input assumptions be verified by your firm. REGENESIS developed this Scope of Work in reliance upon the data and professional judgments provided by those whom completed the earlier environmental site assessment(s). The fees and charges associated with the Scope of Work were generated through REGENESIS' proprietary formulas and thus may not conform to billing guidelines, constraints or other limits on fees. REGENESIS does not seek reimbursement directly from any government agency or any governmental reimbursement fund (the "Government"). In any circumstance where REGENESIS may serve as a supplier or subcontractor to an entity which seeks reimbursement from the Government for all or part of the services performed or products provided by REGENESIS, it is the sole responsibility of the entity seeking reimbursement to ensure the Scope of Work and associated charges are in compliance with and acceptable to the Government prior to submission. When serving as a supplier or subcontractor to an entity which seeks reimbursement from the Government, REGENESIS does not knowingly present or cause to be presented any claim for payment to the Government. Closing Please feel free to contact me if you need additional information or have any questions regarding our evaluation and/or this correspondence (contact info listed above). Thank you for considering REGENESIS as part or your remedial solution for this project. Page 2 of 2 FORMER PUMP ISLAND A• MW-2R - Il (BDL* l� 1 fl 2 - 1 � FORMER UST AREA _ (UST #1 & #2) FORMER CAVINESS GROCERY GRAPHIC SCALE 0 5 10 20 1 inch = 10 ft. LEGEND TYPE 11 MONITORING WELL (23,210) TOTAL BTEX CONCENTRATION (uglL) - OW28116 (1,138') TOTAL BTEX CONCENTRATION (uglL) - 01104 (BDL..) NO BTEX COMPOUNDS DETECTED ABOVE LABORATORY METHOD DETECTION LIMITS-12l22115 NOTES: 1. 2014 AERIAL OBTAINED FROM THE LOCAL COUNTY GIS DEPARTMENT- 2. ESTIMATED EXTENT OF TOTAL BTEX IN GROUNDWATER INCLUDES ANALYTICAL DATA FOR SAMPLES OBTAINED ON 0942&16 (MW-1RR AND MW-V),12f9,21S5 [MW-M AND 061211H (MW-4). Aom (19,660) MW-1RR f (23,2301� MW-3R ESTIMATED EXTENT OF BENZENE AT CONCENTRATIONS EXCEEDING GCL ESTIMATED EXTENT OF TOTAL BTEX IN � GROUNDWATER FORMER UST AREA 1 � -7 (UST#3) 1 � I 1 r � ! f� f Il r1 A 1 AD r� z Z VI az o a m J E 0 z z W rQ Q ~ V Q � LA s' z ou c� } uz Q ¢0 N ry J d LLJ I& z �z� > ao5 a 10 u =�0 L'i� mN w a� 0 LEGEND TYPE II MON[TOR ING WELL (23.210) TOTAL BTEX CONCENTRATION (ug1L) - 08/27/19 NOTES: 1 2G14 AERIAL OBTAINED FRGM THE LOCALCOLINTY GIS DEPARTMENT GRAPHIC SCALE 0 10 20 40 1 inch - 20 R. ESTIMATED EXTENT OF TOTAL BTEX IN FORMER PUMP ISLAND GROUNDWATER ESTIMATED EXTENT OF r Y BENZENE AT CONCENTRATIONS MW-7�R EXCEEDING GCL (NS) f1 r lr- — x 1L 2 Jf47Oflj +� xT-MW 3RR FORMER UST AREA � � I (UST #1 & #2) X X' X 1 I FORMER UST AREA (UST #3) r � 3 l� (2,618) ' f -3R I O MW-4 4 \(37.7) \ I r F r I a SUMMARY OF GROUNDWATER ANALYTICAL RESULTS a 6 n zz rY u ti do O N rl W tr � � i* u ❑ g R s m x m a Y m $ c !! —A ❑a ~ z ao — V) LL Jam r NZa w a � S U a H R J LLI Q m a z a� LLI Analytical Method 6"05l EPA-0260 -Volatile Orpnic Compounds Calculated m m 2 Sample Date m i m 10 CA tlected Ep L 4 I'.` e = = c c m i a x gym_ m a s 87$8-1 71.43-2 104-51-6 135.9$-9 1 107-0&2 15T20-7 15741-4 551-7&6 S"?-a T"76 7a-93-3 708.70.t 1634-04-4 51-20.9 JQW. '1 106-88-3 95-0313 t08-S7-8 NA MW-1RR W2712019 3500 8.104 100 'L3 96 260 2-0 810 220 1200 1 3W sr,OW SW 3W 19,000 2700 180 12,000 M W •2R 8l2712019 MW-M W712019 11 18 28 V 580 17 T8 11 1,400 35 230 27 130 ow 2,000 MW4 W2712019 37 0.7 NC 2L Standard t1000 1 70 70 0.02 0.4 70 600 40 70 25,000 25 4000 100 20 6 70 500 400 400 500 MLs. for Groundwater 5,000,000 5,0W S,t100 SAW s0 400 70Wa 8+1,i500 WL _ 11,700 4,11M000 100,000 20,000 5,000 30,000 250,000 7%5w 25,000 OS,$00 Noter. _ z ! I All (estAw RoAdal to WL Imicro0rans per liter) or parts per Billion 21 Compounds analyzed for by laboratwy but nol listed weia not detected above latwratwy detection Irmils. See the laboratory fuwn included in the Aopendix fw a full list of consliluanls. 3) NC 2L Slarxlarrl- Noah Cerdlrna Grmindwalel 4twlily Standard as per NC Adrn mmrati%a Cnde 15A NCAC (12L 4) GCLs for Gmundwater = MCdENR UST Sectim Grass CaMarnl nadm La is for GrourwMwpr NL = Not Listed Result = Result Exceeds La6oralory Oatecton Lands iim" = Result Exceeds 2L Standard ti = Result Exceeds GCL Vslue 04 REGENESIS • - PersulfOx® Application Design Summary Caviness Grocery MW-1RR Core Field App. Instructions Greensboro, NC MW-1RR Core Application Method Direct Push Prepared For: Spacing Within Rows (ft) 7 Withers & Ravenel Spacing Between Rows (ft) 8 Injection Points (per app.) 7 Target Treatment • Treatment Area ft 2 400 Number of Applications 1 Top Treat Depth ft 25.0 Areal Extent (square ft) 400 Field Mixing Ratios Bot Treat Depth ft 40.0 Top Application Depth (ft bgs) 25 Water per Pt per app (gals) Vertical Treatment Interval ft 15.0 Bottom Application Depth (ft bgs) 40 407 Treatment Zone Volume ft3 6,000 PersulfOx to be Applied (Ibs) 5,951 PersulfOx per Pt per app (Ibs) Treatment Zone Volume cy 222 PersulfOx Solution % 20% 850 Soil Type --- silt Volume Water (gals) 2,852 Total Volume per Pt per app (gals) Porosity cm3/cm3 0.40 Total Volume (gals) 3,150 450 Per Application Totals Effective Porosity cm3/cm3 0.15 Treatment Zone Pore Volume gals 17,953 PersulfOx per app. (Ibs) 5,951 Volume per vertical ft (gals) Treatment Zone Effective Pore Volume gals 6,732 Volume Water per app. (gals) 2,852 30 Fraction Organic Carbon (foc) g/g 0.005 Total Volume per app. (gals) 3,150 Soil Density g/cm3 1.5 Soil Density Ib/ft3 94 Technical Notes/Discussion Soil Weight Ibs 5.6E+05 Hydraulic Conductivity ft/day 1.0 Hydraulic Conductivity cm/sec 3.53E-04 Hydraulic Gradient ft/ft 0.007 GW Velocity ft/day 0.05 GW Velocity ft/yr 17 Sources of Oxidant Demand Unit Value Assumptions/Qualifications Sorbed Phase Contaminant Mass Ibs 56 56 Dissolved Phase Contaminant Mass Ibs In generating this preliminary estimate, Regenesis relied upon professional judgment and site specific information provided by others. Using Total Contaminant Mass Ibs 103 this information as input, we performed calculations based upon known chemical and geologic relationships to generate an estimate of the mass of product and subsurface placement required to affect remediation of the site. Stoichiometric PersulfOx Demand Ibs 3,121 Stoichiometric PersulfOx Required Ibs 4,682 REGENESIS developed this Scope of Work in reliance upon the data and professional judgments provided by those whom completed the Additional Soil Oxidant Demand g/kg 2.0 earlier environmental site assessment(s). The fees and charges associated with the Scope of Work were generated through REGENESIS' SOD PersulfOx Required Ibs 1,248 proprietary formulas and thus may not conform to billing guidelines, constraints or other limits on fees. REGENESIS does not seek Total PersulfOx Required Ibs 5,930 reimbursement directly from any government agency or any governmental reimbursement fund (the "Government"). In any circumstance Application Dosing where REGENESIS may serve as a supplier or subcontractor to an entity which seeks reimbursement from the Government for all or part of the services performed or products provided by REGENESIS, it is the sole responsibility of the entity seeking reimbursement to ensure the Scope of Work and associated charges are in compliance with and acceptable to the Government prior to submission. When serving as a PersulfOx Required Ibs 5,951 supplier or subcontractor to an entity which seeks reimbursement from the Government, REGENESIS does not knowingly present or cause to be presented any claim for payment to the Government. Prepared By: Andy Lowy - Design Specialist Date: 112412020 Purchasing Information Caviness Grocery PersulfOx Required Ibs PersulfOx Cost Estimated Tax and Freight Estimated Tax and Freight Cost* MW-1RR Core 5,951 $10,414 15% $1,562 _J, REGENESIS Currently Available Packaging Options PersulfOx Package Type*** # of packages Ibs required 55.1 lb poly -lined bag 108 5,951 *Note that the combined tax and freight costs are preliminary estimates only. Please contact your local sales manager or Customer Service at 949-366-8000 to obtain a shipping quote. You will be asked to provide a ship -to address and estimated time of delivery. ***Available Package Types are subject to change. PERSULF oX. PersulfOx" Technical Description PersulfOx is an In Situ Chemical Oxidation (ISCO) reagent that destroys organic contaminants found in groundwater and soil through powerful, yet controlled, chemical reactions. A sodium persulfate-based technology (figure 1), PersulfOx employs a patented catalyst to enhance the oxidative destruction of both hydrocarbons and chlorinated contaminants in the subsurface. Typically, sodium persulfate is activated with the addition of heat, chelated metals, hydrogen peroxide, or base in order to generate sulfate radicals. These activation processes are inherently complex, costly and can pose additional health and safety risks. In comparison, PersulfOx is a relatively safe and easy -to -use ISCO agent with a built-in catalyst which activates the persulfate component, generating contaminant -destroying free radicals without the need for the addition of a separate activator. The equation below shows the net complete oxidation of toluene, a constituent of gasoline, by PersulfOx: 0'+ 18 Nat 208 + 14 H2O 7 CO2 + SB NaWi Example of PersulfOx Na; O O Na' P1 11 u i Q 0 FwAt L. =NLm PEAmFAR Olmupa .19CM For a list of treatable contaminants with the use of PersulfOx, view the Range of Treatable Contaminants Guide Chemical Composition • Sodium Persulfate - CAS #7775-27-1 • Sodium Silicate - CAS #1344-09-8 Properties - • pH - 7 to 11.5 at 25°C • Appearance - White, free -flowing powder, clear to cloudy when mixed with water • Odor - Not detectable • Vapor Pressure - None • Chemical Hazard Classification - Class 5.1 Oxidizer Storage and Handling Guidelines IF Storage Store locked up Keep away from heat Store in a cool, dry place out of direct sunlight Handling Minimize dust generation and accumulation Routine housekeeping should be instituted to ensure that dust does not accumulate on surfaces PersulfOx" Technical Description Storage (continued) Store in original tightly closed container Store in a well -ventilated place Do not store near combustible materials Store away from incompatible materials Recommended to store at less than 40°C Provide appropriate exhaust ventilation in places where dust is formed Applications 0 PERSULF Q Handling (continued) Avoid mixing with combustibles Avoid contamination Keep away from clothing and other combustible materials Wear appropriate personal protective equipment Avoid breathing dust Avoid contact with eyes, skin, and clothing Avoid prolonged exposure Do not taste or swallow When using, do not eat, drink or smoke Wear appropriate personal protective equipment Wash hands thoroughly after handling Observe good industrial hygiene practices PersulfOx is mixed with water at a rate of 5% to 20% prior to application. For most applications, REGENESIS suggests a 10-15% solution. The resulting mixture has viscosity similar to water. Injects into formation through direct push injection points, injection wells or other injection delivery systems. Application instructions for this product are contained here PersulfOx Abnlication Instructions. Health and Safety Ak' Material is relatively safe to handle; however, avoid contact with eyes, skin and clothing. OSHA Level D personal protection equipment including: vinyl or rubber gloves, eye protection, and dust mask are recommended when handling this product. Please review the Material Safety Data Sheet for additional storage, usage, and handling requirements here: PersulfOx SDS. 02015 All rights reserved. Regenesis and PersulfOx® are registered trademarks of Regenesis Bioremedisdon Products. All other trademarks are the property of their respectwe owners. t E ENE I In -Situ Aerobic Bioremediation Performance Monitoring Parameters Analytical Parameter Method Contaminants of Concern (COC's) pH Varies Meter reading taken in flow -through cell (DO can also be measured with a Hach kit) Colorimetric Hach Method or EPA 6000 series with filtered and unfiltered samples Dissolved Oxygen (DO) Oxidation Reduction Potential (ORP) Total Fe Total Mn Dissolved Fe Dissolved Mn Sulfate EPA 375.3 or EPA 9056 Nitrate EPA 353.1 or EPA 9056 Total Organic Carbon (TOC) EPA 415.1 or EPA 9060 Chemical Oxygen Demand (COD) EPA 410.1-.2 Biological Oxygen Demand (BOD) EPA 5210B Alkalinity EPA 310.2 Methane, CO2 ASTM D1945