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I I gasoline using DHS Leaking Underground Fuel Tank(LUFT) methods and for benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method 8020 Equipment used for drilling and sampling will be cleaned prior to beginning of work All sampling equipment will be decontaminated between each sampling event using a non-phosphate detergent, an ivory soap solution, and a de-ionized water rinse The drill cuttings, decontamination fluids and groundwater generated during drilling and sampling will be placed in 55-gallon drums and stored on-site On the day following the soil probe sampling, a hollow stem auger drill ng will be utilized to construct one vadose zone well to approximately 25 feet below grade in the vicinity of the zone containing the highest concentration of petroleum hydrocarbons The advantage of utilizing the soil probe system for the soil investigation (rather than a hollow stem auger drill ng) is that the soil probe system results in less impact to the paved surface and no soil cuttings are generated, thus, soil disposal costs are eliminated The advantage of utilizing the mobile laboratory unit, rather than sending soil samples off-site for analysis, is that a greater amount of soil samples can be analyzed at a lower cost, thus, resulting in more data enabling an efficient remedial system design Task 2 - Pilot Test An SVE pilot test will be performed to develop adequate data to assist in the evaluation of SVE as the preferred remedial option at the subject site A San Joaquin Valley Unified Air Pollution Control District permit wavier will be acquired for the test The one day pilot test will utilize a portable air extraction blower system to induce a vacuum pressure on the soil, by extracting air from the vadose well Measurements will be made during the test for several parameters that will allow evaluation of SVE feasibility to remediate the impacted soil The air extraction rate, pressure response, radius of influence, and concentration of volatile organic compounds will be recorded All air emissions will be abated during the test by two 200 pound granular activated carbon (GAC) canisters Regularly spaced PID readings will be taken from the air discharge from the GAC to assure that no VOC emissions are released to the atmosphere These data will allow the initial design of a full-scale SVE system for the site The pricing and capability assessment of an SVE system based on this pilot test will allow for an efficient feasibility study M91ed2 4