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. Work Plan for Well Installation and Testing January 13, 1995 San Joaquin Catholic Cemetery 3 TASK 3 SOIL VAPOR EXTRACTION TESTING Soil vapor extraction testing will be conducted at the site over a one-day period Testing will be performed to determine the following attainable radius of influence, attainable flow rates, hydrocarbon concentration in the extracted soil vapor, and approximate hydrocarbon dissipation rates Vapors will be extracted from three separate points, one single shallow VEW, one shallow nested VEW and one deep nested VEW (Figure 1) using a vacuum pump rated for 250 CFM flow .� and 13 inches of mercury vacuum Extracted vapors removed by the vacuum pump will be routed through an internal combustion unit (VR Systems model V3C) approved for treatment by the San Joaquin Valley Unified Air Pollution Control District Induced vacuum readings at the surrounding monitoring wells and VEWs, and applied vacuum, LEL, oxygen, and flow rate readings at the extraction point will be collected during the test at 10 to 15 minute intervals Extracted vapor samples from each extraction point will be collected in Tedlar bags when steady state pneumatic conditions have been attained and later in the test to determine the rate of hydrocarbon dissipation over the duration of the test The extracted soil vapor samples will be labeled, stored in an insulated container at ambient temperature, and submitted under a chain-of-custody manifest to a State- certified laboratory for analysis of BTEX and TPH-G In addition, one extracted vapor sample will be analyzed for methane TASK 4 REPORT PREPARATION Groundwater Technology will prepare a report summarizing the methods and results of the work described above The report will include a historical summary of laboratory analytical results of soil, groundwater and vapor sampling In addition the report will be supported by appropriate maps and graphics A summary of recommended alternatives for remedial action will be Included based on the results of the soil vapor extraction test PROJECT SCHEDULE Groundwater Technology, Inc is prepared to begin the work outlined above within two weeks of approval by the SJCPHS-EHD It Is anticipated that well installation and testing can be completed within one week Laboratory analyses reporting will take an additional four weeks • 00815VEr WKP(MI SC-17) E® GROUNDWATER ❑ TECHNOLOGY -