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Kayo Oil C )pany conoco <br /> l y L <br /> a subsidiary of L_,ioeo Inc. <br /> JEP.O. Box 4784 <br /> Houston, TX 77210-4784 <br /> November 8, 1988 <br /> v <br /> NOV 91988 <br /> Mr . Gordon Boggs E: ifilJN,JEN ^,t 1E,ati1 <br /> Regional Water Quality Control Board PE-RiNIIT 1 SE!<Vi-_ES <br /> Central Valley Region <br /> 3443 Routier RD <br /> Sacramento, CA 95823 <br /> RE: 4'325 E. WashingtonStockton, CA <br /> Requested change to Remedial? Plan <br /> Dear Mr . Boggs : <br /> Thank you for taking the time to talk to me on Friday, 10/28/88 . <br /> The central point of the discussion was Kayo Oil 's request to <br /> modify the originally proposed groundwater remediation plan for the . <br /> Stockton site . Gr-o-undwat-er r-e-medi-ati-on-Nwill-wb_e-ga-c_h-ie-ved-wbyiri:ns-itu <br /> �_—�.__. __ -- <br /> bi-oreme-diat-ikon. Nutrients and oxygen in the form of hydrogen <br /> peroxide will be delivered to the ground through injection wells . <br /> Recovery wells will establish a cone of depression beneath the site <br /> and "flush oxygen and nutrients through the soil and groundwater .- <br /> The <br /> roundwater .The modification requested is to change from a 4 to 5 gpm over- / <br /> withdrawal to a balance of amount of water returned to the ground <br /> equalling the amount withdrawn. { <br /> The purpose of this letter is to provide you with background for <br /> our request and answer the concerns brought up during our <br /> discussion. The concerns consisted of : 1 ) the reason for the r <br /> requested change, 2 ) the effect of the pumping change on low <br /> permeability surface soils in this area of Stockton, 3 ) what are t <br /> the proposed modifications to the remediation system and what are <br /> the effects in relation to this site, .4 ) the monitoring system <br /> which will be used to monitor the groundwater clean-up, and 5) a <br /> contingency plan should the monitoring system show an induced move- <br /> ment of gasoline hydrocarbons off-site . These points are addressed <br /> below. <br /> �r <br /> 1) The reason for the requested change :. <br /> Ws <br /> The two main reasons for the requested change are technical <br /> and economic . The City of Stockton Municipal Utilities <br /> District has issued a 21 point interim policy (enclosed ) <br /> regulating gasoline contaminated water discharge to the sewer . " <br /> 21-493S <br />