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RE S hiH S NCKyhIEh•ITCI TE�ti 7i , � e1) { 2 11 . 27 No . 011 P . 03 <br /> Working To Restore Nature <br /> 3164 mold Camp Drive <br /> Keitcho Cordova , CA 95x,70 <br /> Phone ; (916) 85 2 &6690 <br /> av (916) 852-6688 <br /> September 22, 1992 <br /> Mr, Anthony Mendes <br /> San Joaquin County Air Pollution Control District <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject ; Notification of Combined Air Sparge/ Vapor-Extraction Feasibility Test to be <br /> Performed at ARCO Service Station No. 2130. 7906 North EI Dorado Street, <br /> Stockton , California <br /> Mr. Mendez: <br /> RESNA Industries ( RESNA ) proposes to conduct a combined air sparge/vapor extraction <br /> feasibility test (AS/ VET) at the subject site during the week of October 5 , 1992. At the <br /> request of ARCO Products Company (.ARCO), RESNA is performing this work in <br /> conjunction with an ongoing environmental investigation and anticipated treatment of <br /> hydrocarbon-bearing soil and ground water beneath the subject site. Lead regulatory <br /> oversight for the environmental programs being implemented at the site is being conducted <br /> by Mr. Michael Wurna of the San Joaquin County Public Health Services. <br /> n c -.n alternative to conventional groundwater pumping and aboveground treatment, ARCO <br /> I <br /> ras requeFted that RESNA evaluate the feasibility of utilizing air sparging technology to <br /> refflo%ve dissolved gasoline hydrocarbons from ground water beneath the site . Air sparging <br /> involves the inje :tion of air below the water surface to strip dissolved hydrocarbons from <br /> the ground water to the vadose zone, Vapors transmitted to the vadose zone are captured <br /> using soil vapor-extraction wells . A vapor extraction test will be performed to demonstrate <br /> that vapor-extraction is capable of capturing air sparge off-gas that is transmitted to the <br /> vadose zone. <br /> The ASIVET will be performed to collect site specific data and evalunte the feasibility of <br /> utilizing air sparging and vapor extraction technology as a hydi ocarbon-removal alternative. <br /> The equipment to be used for the test will consist of ( 1 ) blower, (2) an internal combustion <br /> ( I C) engine, (3) instrumentation for measuring air flow , air velocity, air pressure, and air <br /> temperature, (4 ) polyvinyl chloride piping , fittings, and wellhead connections , (5) a portable <br /> organic vapor analyzer and air sampling, apparatus and ( 6 ) existing vapor-extraction wells <br /> 09L2aman ' <br /> 30003.8 <br />