ARCHIVED REPORTS_XR0006018 - Laserfiche WebLink

Home Browse Search

C A M B R ! A Feasibility Test Report JIMCO Truck Plaza 1022 Frontage Road, Ripon, California November 16, 2005 (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX), and methyl tertiary butyl ether (MTBE) using EPA Method 8015/8021 3 2 2. Combined SVE/AS Test Procedures Cambria performed a combined SVE and AS test using well EW-1 for vapor extraction and well AS-1 for air sparging Operating parameters for the SVE portion of the test were the same as those used during the constant vacuum test Air was injected into well AS-1 starting at 3 psi and then slowly increased in increments of 0 1 psi until a breakthrough pressure of 6 9 psi was observed After overcoming the hydrostatic head, air injection was conducted at two pressures of approximately 4 8 psi and 6 5 psi During the test, Cambria measured vapor extraction flow rates, wellhead vacuum, injection flow rates, injection pressure at the wellhead, and the pressure or vacuum influence in observation wells MW-2, MW-7, MW-9, and MW-10 The depth to water, dissolved oxygen (DO), and hydrocarbon concentrations in the observation wells were also monitored periodically Extracted soil vapor was analyzed with a Honba gas analyzer, and one vapor sample was collected from the SVE vapor stream towards the end of the combined SVE/AS test The vapor sample was analyzed for TPHg, BTEX,and MTBE by EPA Method 8015/8021 3 2 3 Test Equipment A liquid-ring vacuum pump capable of generating up to 28 inches of mercury (in Hg) vacuum and a flow rate of 400 actual cubic feet per minute (acfm) was used for vapor extraction A propane-fired thermal oxidizer was used for soil vapor abatement An air compressor was used to inject compressed air into the saturated zone A trailer-mounted 100-kilowatt diesel generator was used to provide electricity for the extraction and treatment equipment A tempos aiy pi opane tank was used to provide supplemental fuel as necessary A Horiba gas analyzer, calibrated to iso-butlylene, was used to measure carbon dioxide and hydrocarbon vapor concentrations from the extraction well A TSI thermoanemometer was used to measure vapor extraction flow rates and temperature Magnehelic gauges were used to measure the vacuum applied at the wellhead and induced in the observation wells A Solinst water level meter was used to measure the depth of groundwater in the wells A Thomas Industries vacuum pump was used to collect soil vapor samples in one-liter Tedlar bags for field measurements and laboratory analysis 7