FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

i I '1 Soil Vapor Extraction Pilot Test Report STALLWORTH AUTO SALES j . 602 North California Street, Stockton, California I . 1 .0. INTRODUCTION At the request of Mr. Stallworth, Advanced GeoEnvironmental, Inc. (AGE) has prepared this report of environmental activities conducted at the site located at 602 North California Street, Stockton, California (site). The report documents the results of two 8-hour SVE pilot tests conducted to provide vapor extraction data for the proper design of a soil remediation system. IBJ The site and the surrounding area are illustrated on Figure 1 ; a plan of the site, including soil boring [ and well locations, is illustrated on Figure 2. Site background information is summarized in aAppendix A. p This report is prepared in accordance with guidelines established by the Central Valley Regional Water Quality Control Board (CVRWQCB) for the investigation of underground storage tank (UST) sites. Field work was performed as detailed in the AGE-prepared Soil Vapor Extraction14 ir Sparging Feasibility Testing Work Plan, dated 14 December 2006. it 2.0. SOIL VAPOR EXTRACTION PILOT TESTS On 17 July 2007, an 8-hourpilottest was conducted using lower vadose-screened vaporwell VW- 1 , I I screened from 20 feet to 30 feet bsg, as the extraction well. On 18 July 2007, an 8-hour pilot test was conducted using upper vadose-screened vapor well VW-2, screened from 10 feet to 20 feet bsg, as the extraction well. 2. 1 . LOWER VADOSE SVE PILOT TEST I On 17 July 2007, an 8-hour SVE pilot test was conducted at the site using lower vadose-screened vapor well VW- 1 , screened from 20 feet to 30 feet bsg, as the extraction well. The pilot test was performed to provide SVE data for the proper design of a soil remediation system. The test was conducted using a Fuji regenerative 150 standard cubic feet/minute (sefm) blower powered by a - 2.5 HP motor and electricity was supplied by a gasoline-powered generator. The extracted hydrocarbon vapor was routed through four 400-pound (lb) carbon vessels loaded on a trailer. Effluent air from the vessels was monitored with an OVA equipped with a PID to ensure complete adsorption of hydrocarbon vapors. I The pilot test was initiated at 0900 hr and continued for approximately 8 hours, at which time the test was terminated. An induced vacuum potential was applied to the casing of vapor well VW- I The vacuum-induced pressure reduction was monitored at surrounding observation points (lower vadose vapor extraction well VW-3 , upper vadose vapor wells VW-2 and VW-4, and monitoring — Advanced GeoEnvironmental, Inc.