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  <br /> <br />Central Valley Regional Water Quality Control Board <br /> <br />22 July 2021 <br /> <br /> <br />Munir Obaid & Talal Nasser <br />3501 Kentucky Avenue <br />Riverbank, CA 95367 <br />Nagi & Halima Saleh-Ali <br />40 Jersey Lane <br />Patterson, CA 95363 <br /> <br /> <br />RESPONSE TO WELL DESTRUCTION WORK PLAN, FORMER RANCH MARKET, <br />23569 SOUTH SANTA FE ROAD, RIVERBANK, SAN JOAQUIN COUNTY, LUST <br />CASE #390609, GeoTracker Global ID T0607700477 <br /> <br /> <br />Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff <br />reviewed the Work Plan for Destruction of Groundwater and Soil Vapor Monitoring <br />Wells (Work Plan) dated 18 June 2021. Condor Earth Inc. (Condor) submitted the Work <br />Plan on your behalf for the Former Ranch Market underground storage tank (UST) <br />petroleum release case at 23569 South Santa Fe Road in Riverbank (Site). In the Work <br />Plan, Condor proposes to destroy all of the groundwater and soil gas monitoring wells <br />remaining at the Site, as summarized in the table below. <br /> <br />Well Type No. of <br />Wells <br />Sand Pack <br />Depth Interval <br />Range (ft bgs) <br />Destruction Method Grout Method <br />Shallow <br />Groundwater <br />Monitoring <br />9 23-43 Explosives placed <br />from bottom of <br />sanitary seal to total <br />depth <br />Emplace gout in <br />casing prior to <br />detonating <br />explosives <br />Deep <br />Groundwater <br />Monitoring <br />1 60-70 <br />Soil Gas <br />Monitoring 2 5.5-6 <br />Overdrill with 7” <br />hollow stem auger <br />to total depth <br />Backfill borehole <br /> <br />Central Valley Water Board staff concurs with the scope of work as proposed in the <br />Work Plan. However, San Joaquin County Environmental Health Department <br />(SJCEHD) maintains jurisdictional authority over well destructions in San Joaquin <br />County, so the proposed well destructions must be completed under, and in accordance <br />with, SJCEHD permits and requirements. By 29 October 2021, please submit a Well <br />Destruction Report. In this report, please summarize the date and method of each well