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• Groundwater Gradient 0 108 Rift SVE QUARTERLY OPERATION AND PERFORMANCE Equipment Inventory Two 200 cfm King, Buck & Associates SVE Systems [S!-Nos 9321(Unit 1) &9230 unit 2)] ExtractionWells VW-6, VW-8, VW-9, & MW-9 connected to Unit 1 (currently) VW-1, VW-14, MW-3, & MW-7 connected to Unit 2 (currently) Operating Mode Catalytic Required Permits San Joaquin Valley Air Pollution Control District Permit Nos N-5026-1-0& N-5026-2-0 GRO Conc End of Period [Unit 1] 2,800 Mg/M3 total influent GRO Conc End of Period [Unit 2] _2,500 mglm3(total influent) Benzene Conc End of Period [Unit 1] 12 mg/m3 total influent Benzene Conc End of Period [Unit 2] 25 Mg/M3 total influent MTBE Conc End of Period [Unit 11 51 Mg/M3 total influent MTBE Conc End of Period [Unit 2] 35 mg/m3 total influent Average Flow Rate This Period [Unit 11 157 30 scfm Average Flow Rate This Period [Unit 21 226 15 scfm Applied Vacuum This Period [Unit 1] 11 inches water column Applied Vacuum This Period [Unit 2] 12 inches water column HC Destroyed This Period (lab) 86 92 lbs as GRO from both units Cumulative HC Destroyed 86 92 lbs as GRO(from both units) Number of Auto Shutdowns 2 (Unit 2 DISCUSSION During the weekly visits to the site and the quarterly monitoring event, product was measured in well MW-1 at thicknesses ranging from 0 01 to 0 03 feet thick During each site visit, free product was manually bailed from well MW-1 and placed In properly labeled DOT approved drums pending disposal Approximately 14 gallons of a product/water mixture was bailed from well MW-1 during the first quarter 2004 Approximately 185 gallons of product/water mixture have been balled to date Product thickness measurements and volumes of liquid bailed are summarized in Table 1 In wells MW-4, MW-6, MW-8, MW-9, VW-1, VW-7, VW-8, VW-10, VW-12, VW-14, VW-18, and VW-20, there was less than 1 foot of water column in the well, the water in these wells does not appear to be formation water Wells MW-5, MW-7, VW-9, VW-11, VW-13, VW-16, VW-17, and VW-19 were dry Well VW-15 was obstructed Groundwater in wells screened within the upper water-bearing zone (MW-2 and VW-2 through VW-6) were measured at depths between 43 90 and 59 75 feet below bgs Groundwater levels in the wells screened within the upper water-bearing zone have increased between 0 01 to 5 80 feet since the December 22, 2003, monitoring event In the lower water-bearing zone, groundwater was measured for the first time in well MW-3 at 91 05 feet bgs Groundwater in well MW-1 was measured at P IBP-Arco for URS16I001Quarterly120041Arco_6100 1Q04 doc STR/1TU5