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I ' Soil Vapor Extraction Pilot Test Report • Former Fisco Warehouse (Howard Lenz Property) ' 1648 Shaw Road, Stockton, California ' 1.0 INTRODUCTION At the request of Mr Peter Lenz of Irmovative Beverage Brokers,Advanced GeoEnvironmental,Inc ' (AGE) has prepared this report for the property located at 1648 Shaw Road, Stockton, California The report documents the procedures and results of an 8-hour soil vapor extraction(SVE)pilot test Iat the site The site and the surrounding area are illustrated in Figure 1 On-site structures and well locations ' are illustrated on Figure 2 Background information and results of previous investigations at the site can be found in the AGE-prepared documents,Monitoring Well Installation Work Plan, dated 21 August 2000 and Monitoring Well Installation and Quarterly Report-First Quarter 2001,dated 23 March 2001 2.0. PROCEDURES On 14 January 2002, an 8-hour SVE pilot test was conducted at the site using vapor well VW-2, I screened from 15 feet below surface grade (bsg) to 35 feet bsg as the extraction well The pilot test was performed to provide SVE data prior to installation of a full scale remediation system The test was conducted using a VACLEEN 1000 SVE system,manufactured by Environmental Techniques The VACLEEN unit consists of a positive-displacement blower, driven by an internal combustion (IC) engine Propane was used as a supplemental fuel source to start the engine and maintain performance Hydrocarbon vapor was destroyed as part of the internal combustion process Emissions from the engine were routed through two catalytic converters to maximize the destruction rate of the extracted hydrocarbon vapors ' All field work procedures and reporting requirements are in accordance with guidelines issued by the Central Valley Region of the Regional Water Quality Control Board (CVRWQCB) for subsurface investigation of underground storage tank (UST) system sites 21 SVE PILOT TEST The pilot test was initiated at 9 00 am and continued for approximately 8 hours An induced vacuum potential was applied to the casing of vapor well VW-2 The vacuum-induced pressure reduction was monitored at surrounding observation points (VW-1, VW-3, MW-2, MW-4, MW-5, MW-6 and MW-7) with air-tight well caps pre-connected with Magnehelic vacuum gauges fitted to each observation well A sample port was tapped into the PVC near the wellhead and a portable organic vapor meter equipped with a photo-ionization detector (PID Microtip model 1000 calibrated to isobutylene) was used to measure organic vapor (OV) concentrations The organic vapor I Advanced GeoEnvironmental,Inc f