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GAVIN NEWSOM <br /> GWFIiNOH <br /> csu Foxxia YANA GARCIA <br /> SE Water Boards �■/ ENVIRONMENTAL <br /> FOR <br /> ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 30 August 2023 <br /> 2151 Country Club, LLC 2151 Country Club, LLC <br /> c/o Roger Hartley c/o Roger Hartley <br /> P.O. Box 1692 2151 Country Club Blvd <br /> Manteca, CA 95336 Stockton, CA 95204 <br /> REQUEST FOR DEDICATED BIO-SPARGE WELL WORK PLAN, <br /> BOULEVARD AUTOMOTIVE, 2151 COUNTRY CLUB BOULEVARD, STOCKTON, <br /> SAN JOAQUIN COUNTY, LUST CASE #390044, GLOBAL ID #T0607700030 <br /> Central Valley Water Board staff reviewed the Work Plan for Bio-sparge Feasibility <br /> Testing (Work Plan) dated 14 July 2023. Frey Environmental Inc. (Frey) submitted this <br /> document on your behalf for the Boulevard Automotive underground storage tank (UST) <br /> petroleum release case at 2151 Country Club Boulevard in Stockton (Site). In the Work <br /> Plan, Frey proposes to conduct a 5-day bio-sparge pilot test to evaluate the feasibility of <br /> bio-sparge remediation at the Site. <br /> Central Valley Water Board staff has the following comments: <br /> 1. Frey proposes to use existing monitoring wells MW-15 and MW-16 as bio-sparge <br /> injection wells. Central Valley Water Board staff concurs with the use of MW-15 <br /> as a bio-sparge well, but not with MW-16. Frey refers to monitoring wells used <br /> for the purpose of monitoring remedial progress as observation wells. The wells <br /> proposed to be used as intermediate water zone observation wells are <br /> sufficiently close to MW-15 to allow for the use of MW-15 as a bio-sparge well. <br /> However, due to a lack of close surrounding observation wells in the deep water <br /> zone, staff recommends a dedicated bio-sparge well within 30ft of MW-16, with <br /> MW-16 to be used as an observation well. Staff requests a work plan for the <br /> installation of a dedicated deep zone bio-sparge well. Table 1 at the end of this <br /> document presents the distance between bio-sparge and remediation monitoring <br /> wells. <br /> 2. Frey proposes to monitor various remediation parameters in the two bio-sparge <br /> wells and in observation wells IW-2, IW-4, IW-6, MW-10C, MW-11 C, and MW-18. <br /> In order to provide intermediate zone monitoring north of MW-15, Central Valley <br /> Water Board staff requests that you also utilize well MW-26 as an observation <br /> well. Staff also requests that you monitor the requested dedicated deep zone <br /> bio-sparge well. <br /> MARK BRADFORD, CHAIR I PATRICK PULUPA, ESQ., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200, Rancho Cordova, CA 95670 1 www.waterboards.ca.gov/centralvalley <br />