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' RIEMEDIATION SYSTEM SUMMARY <br />' In Situ Groundwater Extraction and Treatment System VB <br /> System description: <br /> A vacuum vaporizer wells stem known as LTVB nterdruck Verdam fer Brunnen is capable of <br /> p Y � p )� p <br />' extracting groundwater from one well,UVB The UVB treatment system consists of an in situ,400- <br /> millimeter-diameter reduced pressure air stripper and a 5-horsepower blower and includes a <br /> weatherproof cover and moisture knockout drum The moisture knockout drum has a built-in <br />' stripping unit to treat any accumulated water prior to removal Vapors stripped from groundwater in <br /> the UVB air stripper are extracted by the UVB vacuum blower The pressure outlet of the UVB <br /> blower is connected to a Thermtech VAC 25 thermal/catalytic oxidizer, to destroy volatile organic <br />' compound vapors in a heated chamber prior to release into the ambient air <br /> System startup date: b February 1997 <br />' Active extraction wells: None <br /> Inactive extraction wells/reason. UVB (The system was shut down on 22 September 2000 as <br /> proposed during the 12 September 2000 meeting between San <br />' Joaquin County Public Health Services and ExxonMobil <br /> Refining and Supply Company) <br />'. Modifications made during reporting period/reasons for modifications <br /> None <br />' Status of system operation during reporting period/reasons for downtime. <br />' The UVB system did not operate <br /> - System performance data totals (totals since system startup) <br /> Groundwater extracted: Not applicable <br />' Pounds of TPH removed, 1,998 7 (calculated as TPH-g) <br /> Pounds of benzene removed: 1845 <br /> Pounds of MTBE removed: Not calculated <br />' UVB system proposed work. <br />' The UVB system will remain shut down <br /> 0 1Profects1739421PLBLIMO—&—WQuarterly Progress Report\204413942 Q1004 system doc 3 <br />