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1 <br /> Geological Technics Inc, <br /> 11077 1h St. <br /> Modesto,Cafifomia 9535422- R ECENED <br /> (209)522-4119/Fax(209)522-4227 lU^'� <br /> NOV 0 8 Z004 <br /> November 3, 2004 <br /> ENVIRONMENT HEALTH <br /> GTI Project No.: 750.2 PERMIT/SERVICES <br /> GTI Project Name: City of Escalon <br /> Ms Lisa Middleton <br /> San Joaquin Valley Air Pollution Control District(SJVAPCD) <br /> 4230 Kiernan Ave.,#130 <br /> Modesto, California 95356-9322 <br /> RE: Authority To Construct(N-4546-2-1) <br /> City of Escalon (Former Arco Mini Mart), 1305 Escalon,Ave.,Escalon,CA <br /> Dear Ms Middleton: <br /> Attached are copies of the laboratory data (Air Toxics) for the influent and effluent air samples <br /> collected on September 24, 2004 from the Soil Vapor Extraction—Granulated Activated Carbon <br /> System (SVE). The SVE was started and air samples collected in the presence of San Joaquin <br /> County Environmental Health Department (SJCEHD) and SJVAPCD personnel on September <br /> 24,2004. <br /> During the initial inspection Ms Middleton requested that the initial laboratory sample analysis <br /> be submitted to the SJVAPCD in accordance to ATC N-4546-2-1 Section 15. Ms Middleton <br /> stated that the submission of monthly and annual reports is not required. As per the ATC, <br /> records of all site activities, field measurements, laboratory results and other compliance <br /> requirements are kept by GTI and are available for SJVAPCD inspection upon request. <br /> • Flow rate at initial inspection was 182 cfm <br /> • Calculations indicate the system is operating at 99.7%efficiency <br /> • Calculations indicate VOC emissions from the soil remediation system have a cumulative <br /> total of 1.06 pounds in 40 days of operation <br /> • As of November 3, 2004, GTI estimates that 125 pounds of TPH-G, BTEX and MtBE <br /> constituents have been removed from the subsurface by the SVE <br /> If you should have any questions regarding this project,please contact Ray Kabianow or myself. <br /> Respectfully Submitted, <br /> GEOLOClICAL TEUN1CS INC <br /> Eric L. Price <br /> Geologist <br /> cc: Lori Duncan—SJC PHS/EHD <br /> Gordon Boggs—RWQCB-CVR <br /> Doug Stidham—City of Escalon <br /> USTCFP <br />