ARCHIVED REPORTS_XR0002550 - Laserfiche WebLink

Home Browse Search

' Soil Vapor Extraction Pilot Test Report • LARRY'S AUTO ' 308 North Grant Street, Stockton, California ' lA. INTRODUCTION At the request ofAMr Skobrak of Larry's Auto,Advanced GeoEnvironmental, Inc (AGE)has ' prepared this report for the property located at 308 North Grant Street, Stockton, California The report documents the procedures and results of an 8-hour soil vapor extraction(SVE)pilot test at 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 document, Quarterly Report- Fourth Quarter 2005, ' dated 15 February 2006 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 and Soil Vapor Extraction Pilot Test dated 10 November 2005 and approved by the San Joaquin County - Environmental ' Health Department letter dated 27 December 2005 Ile 2.0. PROCEDURES On 17 January 2006, an 8-hour SVE pilot test was conducted at the site using vapor wells VW-5A and VW-513, respectively, as the extraction wells for two four-hour stages of the pilot test Vapor Y4 64 well VW-5 was drilled at an angle of 10° from vertical directed N 80' W, with a horizontal run of & 9 7 feet, and was triple-completed as a vapor extraction remediation well VW_!� is screened from 13 feet below surface grade (bsg)to 23 feet bsg,V W%from 26 5 to 41 5 feet bsg,and VW-5C from 45 to 55 feet bsg(Figure 3) The first four hours(phase I)of the pilot test utilized shallowly screened VW-5A, the second four hours (phase II) utilized the deeper-screened VW-5B, VW-5C was not utilized as it is screened completely below the water table J 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 tengine 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 1 ' Advanced GeoEnvironmcntal,Inc r