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B�1 Brown and Caldwe <br /> eJ Consultants <br /> r� <br /> 723 S Street <br /> Sacramento <br /> California 95814-7092 <br /> (916)444-0123 <br /> FAX(916)444-8437 <br /> May 8, 1991 E <br /> ILAL11 <br /> IV <br /> MAY 13 IT-11 <br /> Ms Mary F. Meays IVIRONMENTAL HEALTH <br /> Environmental Health Specialist PERMIT/SERVICES <br /> Public Health Services <br /> San Joaquin County <br /> 445 North San Joaquin <br /> Stockton, California 95201 017-5690-01/1 <br /> Subject: Notice to Abate, Unsealed Groundwater.Recovery Well, <br /> ARCO Station 2133, Stockton, California <br /> Dear Ms. Meays: <br /> We are sending this letter in response to the Notice to Abate dated April 16, 1991. The Notice <br /> recommends that a sanitary seal be placed on the extraction well as per San Joaquin County <br /> Ordinance,Number =1862 and the City of Stockton Ordinance Number 2311-C. S. at ARCO <br /> Products Company;(ARCO)::Station 2133, located at 2908:West Benjamin,Holt Drive,,Stockton, <br /> California. <br /> ARCO will comply with the request to install a sanitary seal"on the extraction.well. The seal <br /> will consist of a polyvinyl chloride well cap modified to accept the submersible pump power <br /> cable, suspension cable, discharge line, and the cable for a low level pump control switch. <br /> Compression type fittings will be used to seal the openings. A lower explosive limit (LEL)meter <br /> currently located in the well opening will be removed when the seal is installed, because the LEL <br /> meter must be open to the atmosphere and is no longer useful once the well is sealed. The <br /> current Water Well Standards: State of California, Department of Water Resources Bulletin <br /> 74=81 specifications for installing a "well cap" on a well with a submersible pump will be <br /> followed. Page 37 of the Bulletin shows a schematic of the installation. and is included as <br /> Exhibit A. <br /> While ARCO does agree to comply with the request, we feel that the requirement of a sanitary <br /> seal on anextraction well for the recovery of shallow groundwater containing petroleum <br /> hydrocarbons is not necessary. The water does not meet drinking water standards, and the open <br /> well, while allowing some hydrocarbon vapors to be vented, does not present a serious hazard. <br /> The seal will be.installed-as.;soon.as a contractor familiar.with the installation of,sanitary well <br /> seals can be.scheduled <br />