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!1 � oo" New7ou <br /> uM <br /> aaavxnxu Ju,o Bwuwr.ao <br /> Water Boards <br /> I <br /> Central Valley Regional Water Quality Control Board <br /> 4 February 2019 <br /> Angela Lee <br /> Huntbrook Holdings LLC <br /> 2351 Sunset Boulevard#170-717 <br /> Rocklin, CA 95768 <br /> II <br /> E&R FREEMAN, 3138 E. MAIN STREET, STOCKTON, SAN JOAQUIN COUNTY, <br /> CASE# 390328 <br /> Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff have <br /> reviewed the Work Plan for Proposed Additional Off-Site Groundwater Monitoring Wells <br /> (Work Plan) dated 2 January 2019, submitted on your behalf by RDM Environmental Inc. <br /> (RDM)for the E&R Freeman unauthorized petroleum release at 3138 E. Main Street in <br /> Stockton (Site). <br /> In response to increasing concentrations of methyl tent butyl ether(MTBE) and tent butyl <br /> alcohol (TBA) in the currently downgradient-most shallow monitoring well, MW-5, in the Work <br /> Plan RDM proposes to install three monitoring wells northeast of the Site to define the extent <br /> of hydrocarbon impact to groundwater. The wells are proposed as follows: <br /> Proposed Location Relation to Site Target Screen Sampling <br /> Well Distance Direction Ground- Interval <br /> water(ft) Zone (ft bgs) <br /> MW-9 Church Parking Lot 250 NE At least 48 <br /> MW-10 Main St 240 ENE hours after <br /> MW-10(Alt) S. Windsor Ave 315 ENE Shallow 65-45 development; <br /> quarterly for 3 <br /> MW-11 S. Windsor Ave 360 NE additional <br /> quarters <br /> Alt=Alternate well location proposed incase City will not permit a well in Main St. <br /> R=feel;bgs=below ground surface <br /> Based on discussions with Mr. Mike Berrington of RDM, locations for the proposed wells are <br /> limited by known access issues to the Main Street City right-of-way as well as the residential <br /> and commer ial- roperties immediately north of Main Street. As such, Central Valley Water <br /> Board sta concur ith the proposed well locations and the proposed alternate well location. <br /> By 17 May 2019, please submit a Well Installation Report detailing completion of the <br /> proposed scope of work and the resultant findings, as well as the initial groundwater <br /> sampling results. <br /> KARL E.Loxatev SCU,P.E.,CRAB I PATRIOK POWnA,Ego.,FXK1R,Va orr¢eR <br /> 11020 sun Conies DING 1200,Rancho Cmaova,CA 05670 1 w ,Rrat8100a1Ga.Ce.00v/contraNaRoy <br /> (j nFcrcaao risen <br />