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«< EauuRo 0.Boom JR. <br /> ooYa,a <br /> •�► r�w r w MArnww Roomuei <br /> "'`� <br /> Water Boards <br /> d1IRO1�IHl1.LL ITOres„oR <br /> Central Valley Regional Water Quality Control Board <br /> 25 February 2019 <br /> Ms. Beverly Garcia <br /> Raymond Investments <br /> 817 South Center Street <br /> Stockton, CA 95206 <br /> ADDENDUM TO REVISED WORK PLAN FOR ADDITIONAL SITE INVESTIGATION FOR <br /> STEP-OUT BORINGS, RAYMOND INVESTMENT CORPORATION-HELENA CHEMICAL <br /> FACILITY, 2245 WEST CHARTER WAY, STOCKTON, SAN JOAQUIN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board (Central Valley Water Board) <br /> have reviewed the 29 January 2019 letter, Addendum to Revised Work Plan for Additional Site <br /> Investigation dated February 27, 2018 Former Helena Chemical Facility, 2245 West Charter <br /> Way, Stockton, CA, submitted on your behalf by Condor Earth for the subject site (Site). <br /> The letter presents step-out boring locations proposed for delineating 1,2,3-trichloropropane <br /> (1,2,3-TCP) and nitrate at the Site. The letter indicates that all work will be performed in <br /> accordance with the approved 27 February 2018 Revised Work Plan for Additional Site <br /> Investigation. <br /> Central Valley Water Board staff concur with the proposed step-out locations. You may proceed <br /> with scheduling the field investigations. Please notify this office at least 72 hours prior to <br /> initiation of field activities in the event that staff elect to be present to observe the work and/or <br /> collect split samples. Results of this additional investigation should be submitted to this office no <br /> later than 15 May 2019. <br /> If you have any questions regarding this letter, you can contact me at (916) 464-4746, or by <br /> email at Aimee.Phiri@waterboards.ca.gov. <br /> AIMEE C. PHIRI, P.E. <br /> Water Resource Control Engineer <br /> Federal/Private Site Cleanup Unit <br /> cc (by email): Mr. Scott Maim, Maim Fagundes LLP, Stockton <br /> Mr. John Lane, P.G., Condor Earth Technologies, Inc., Stockton <br /> Alex Dewitt, P.G., Condor Earth Technologies, Inc., Stockton <br /> Michael Kith, San Joaquin County, Environmental Health Department <br /> KARL E. LONGLEY SCD, P.E., CHAIR I PATRICK PULUPA, ESO., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive 0200,Rancho Cordova,CA 95670 1 www.waterboards.ca.gov/centralvalley <br /> 0 RECYCLED PAPER <br />