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April 14, 1995 Page 4 • removed from the site, aloe with affected soil in the vicinity of he tanks thereby g y t removing much of the previous source of hydrocarbons to the groundwater Based on the results of previous investigations, PACIFIC proposes to conduct a 6-month field study to validate sustainable use of SVE to accelerate the remediation of hydrocarbon-impacted soil and groundwater SVE removes hydrocarbon vapors from soil pore spaces, the capillary fringe, and groundwater It also inhibits the migration of fugitive vapors Finally, SVE provides oxygen to the vadose and saturated zones, thereby enhancing the rate of biodegradation The scope of work to implement the field study includes the following tasks (1) Authority to Construct/Permit to Operate acquisition, (2) installation of manifold piping from an internal combustion engine to existing vapor extraction Wells VW-1, i V-2, and VW-3, (3) SVE system start-up, (4) remedial progress monitoring (i e , track TPH-g removal rates and biodegradation indicators), and (5) preparation and submittal of a technical report Permitting Along with the appropriate permit application form, all necessary information will be submitted to the San Joaquin Valley Unified Air Pollution Control District (District) to obtain an Authority to Construct Subsequent to soil vapor extraction system start-up and source testing, information will be submitted to the District in order to gain a Permit to Operate Installation PACIFIC proposes to utilize existing Wells VW-1, VW-2, and VW-3 for the purpose of conducting SVE at the site These vadose wells will utilize a common header which will be attached to the manifold of an internal combustion engine The engine will provide the vacuum which will draw the soil vapors through the well casing into the engine The resulting soil vapors are used as a fuel source to run the engine Exhaust gases then pass through a catalytic converter prior to atmospheric discharge per District requirements Soil Vapor Exti action Start-up As a preface to start-up, baseline monitoring of site conditions will take place Parame- ters to be measured and/or recorded will include (1) groundwater elevation, (2) soil vapor hydrocarbon concentration on a per well basis, (3) soil vapor concentrations of oxygen and carbon dioxide on a per well basis, (4) soil vapor moisture content, and (5) dissolved hydrocarbon and oxygen concentrations on a per well basis Start-up and source testing will follow the baseline monitoring event During start-up, • the system will be tuned, flow rates will be monitored, applied and subsurface pressures 3100403A\WORKPLAN