ARCHIVED REPORTS_XR0006386 - Laserfiche WebLink

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1 CLEART'AOTER G R b U P, E N C Induced vacuums were not apparent in monitoring wells located 70 to 118 feet i away • Air flow rates ranged from 1.0 to 18 ACFM with applied vacuums of 50-60 inches • An air sample was collected from VW-1 after a vacuum of 60 inches had been applied for approximately 50 minutes, analytical results indicate that the sample contained 730 ppm (2,200 milligrams per cubic meter) TPHg. VW-2 (at approximately 50 inches vacuum) • Induced vacuums of 0.52 and 0 26 inches were measured at distances of 35 feet (VW-1) and 40 feet (MW-5), respectively • Induced vacuums were not apparent in monitoring wells located 44 to 90 feet away P • Air flow rates were approximately 40 ACFM i ' • An air sample was collected from VW-2 at the end of the step-test after the vacuum had been reduced to approximately 10 inches, analytical results indicate the sample contained nondetectable TPHg, and 0 057 ppm benzene (0 17 ' milligrams per cubic meter) ' I , I � i I " k ' Air Sparge Pilot Test Pressures of 5, 9,'12 psi were applied to SWA for periods of 45, 60, and 30 minutes, respectively. Well SW-2 was tested at applied pressures of 9 and 12 psi for periods of approximately 60 and' 75 minutes, respectively During,the tests, vacuums and/or induced pressures (reported in inches of water) were measured in monitoring wells, SVE wells, and the other sparge well I I 1 I I SW-1 (applied pressures of 5, 9, and 12 psi) I I I;1• No induced pressures were apparent at monitoring points during the 5 psi step-E ! ' I test I d I !! I • I I I I I r I k , l+� I I I ! i I I S I I I l I i I I k I i , r I I I I v i At anlapplied`Ipressure ofl9, psi, apparent in' d, ranged�lfrom 0 60 I inches'(15 feet(away) fo 0 ,15 inches (55 feet away)`� ,I I �1l I 1 I ,� l ( v I�,hNIGllhll ID1011 PAR/3Q/PILOT 12 5 I II, 11, I , 'k I r r r� h rJIr I