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D <br /> I <br /> gown and Caldw <br /> Consultants <br /> r� <br /> 723 S Street <br /> Sacramento <br /> California 95814-7092 <br /> (916)444-0123 <br /> FAX(916)444-8437 <br /> ENVIRONMENT 1 <br /> January 27, :1992 �L HEALTH <br /> PERMIT/SERVICES <br /> Mr. Saed Sadredin <br /> Assistant Manager <br /> San Joaquin'County Air Pollution Control District <br /> -. _ ,2321 WestNashington;Suite I <br /> Stockton, California 95201 . 017-6660-02/1 <br /> Subject: Vapor Extraction Pilot Test Plan of Soil Containing Petroleum Hydrocarbons, <br /> ARCO Station 2133, Stockton, California <br /> Dear Mr. Sadredin: <br /> Brown and Caldwell Consultants (BCC) is planning to conduct a soil vapor extraction pilot test <br /> at ARCO Products Company (ARCO) Station 2133 located at 2908-_Benjamin Hoit Drive in <br /> Stockton, California. The purpose of a pilot vapor extraction_ test is to:- (1) de'terniine the <br /> i feas;<bi ity of designing Ia'-soil vapor extraction and treatment system, and (2) determine-the <br /> �vaporn�This letteations ofr represents ourhsoihv vapor extraction ypilotdtest planorinatedsolvents-irY,the:soilT <br /> Pilot Test Equipment <br /> The equipment that will be used to conduct the pilot test consists of a portable vacuum pump <br /> driven by a 5-horsepower motor. A trailer-mounted generator, driven by a diesel engine, will <br /> provide electrical power to the motor. The vacuum pump assembly and_ ' generator equipment win <br /> `be provided by BCC. Soil vapors will be extracted from four Vapor.exioaction wells. <br /> Proposed Pilot Test Schedule Z <br /> We are proposing to conduct the pilot test some time during the week of February 10, 1992. We E <br /> do not anticipate conducting the test for more than one day. j <br /> Emission Control <br /> Hydrocarbon emissions to the atmosphere will be controlled with granular activated carbon <br /> (GAC). Two 55-gallon GAC units will be,placed in series at the discharge of the vacuum pump. <br /> A portable organic vapor meter will be used to monitor the GAC units for breakthrough. If i <br /> breakthrough occurs, either fresh GAC.units will be installed, or the test will be terminated. <br /> 6660,coxxEsr M.i <br />