Laserfiche WebLink
UPDATE 28 8-02-94 <br /> r� <br /> Mr John Margowski August 2, 1994 <br /> Manager, Environmental Affairs <br /> Wickland Properties <br /> P O Box 13648 <br /> 3640 American River Dr <br /> Sacramento, CA 95853-4648 <br /> (916) 978-2485 <br /> FAX (916) 978-2428 <br /> RE Update Status Report #28 for Former Regal Service Station <br /> #604 , 1.448 North El Dorado Street, Stockton, California 95202, <br /> site code 1081, first update since completion of Site Closure <br /> request <br /> Dear Mr Margowski. <br /> This report has been generated to update site status since a <br /> request for site closure was initiated on June 15, 1994 <br /> Western Geo-Engineers has updated the fate modeling and completed <br /> the Quarterly Ground Water and Vapor Extraction System (VES) <br /> Sampling through July 21, 1994 The previous update status <br /> report and fate modeling represented data through June 13 , 1994 . <br /> UPDATE STATUS REPORT #28, June 14, through July 21, 1994 . <br /> SUMMARY <br /> Vapor extraction has removed the lighter fractions of gasoline <br /> range hydrocarbons found in the soil as well as all of the BTEX' s <br /> dissolved in the ground water and the capillary fringe An <br /> estimated 531 ounds remained in the soil after the February 2 , <br /> 1994 confirmation sampling The system was turned on again <br /> February 16 and last sampled July 21, 1994 and has removed an <br /> additional ounds of bydrocAgb2rLThe WEGE laboratory, <br /> along with the confirmation analysis of MATRIX and AEN indicate <br /> that all of the more volatile and mobile compounds of gasoline <br /> including all of the STEX' s have been removed Modeling has <br /> shown that these remaining, less mobile , non-carcinogenic <br /> compounds have concentrations low enough to warrant being left in <br /> place Results of the most recent modeling (July 12, 1994) <br /> indicate that during the 100 years biodegradation is faster than <br /> contaminant delivery, therefore the TPHg in ground water would <br /> never reach 1 ug/L <br /> Monitoring of the ground water indicates that contaminated ground <br /> water has been remediated and meets the Title 22 and DHS <br /> standards Primary MCL' s have been met for two years, since <br /> September 11, 1992 and Secondary MCL' s have been met for over one <br /> year, since June 18 , 1993 <br /> pagel <br />