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F _ <br /> EAST BAY - WALTER J.BISHOP <br /> MUNICIPAL UTILITY DISTRICT MANAGER OF WASTEWATER <br /> December 15, 1989 <br /> Eilk <br /> g,DEC 2 2 uY� <br /> ENVIRONMENTAL HEALTH <br /> PERM IT/SERViES <br /> Ms. Diane Hinson <br /> Environmental Health Division <br /> San Joaquin Local .Health District <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Dear Ms. Hinson: <br /> Re: Stockton Center - 1804 W. Main Street, Stockton <br /> This letter transmits the .results .of the Soil and Groundwater <br /> Assessment performed by Kleinfelder, Inc. at the District's <br /> Stockton Center located at 1804 W. Main Street in Stockton. <br /> A total of four soil borings and three groundwater .monitoring <br /> wells were installed. The soil analytical results are on Page 12 <br /> and the groundwater monitoring data for 2 sets of samples are on <br /> Page 14 . <br /> In addition to the site assessment work performed by Kleinfelder, <br /> the District removed the two remaining underground storage.-tanks, <br /> at:the.�facil ty on-September._28_,,__l989 . A of 11 report was sent to <br /> Ms:; Kasey Foley _of-your office on November 21 , 1989 . JNo soil <br /> contamination was found in the tank excavations. <br /> The Kleinfelder assessment suggests an on=site source of <br /> groundwater contamination. The. underground .tank suspected to be <br /> the source of the contamination was removed in July, 1987 . At <br /> the time of removal , the concrete vault which encased the tank <br /> was found to be intact. <br /> Additional sampling data is necessary to -confirm the origin of <br /> the contamination. The District will continue to sample the <br /> three groundwater monitoring wells on a quarterly basis . The <br /> District will evaluate installation of additional monitoring <br /> wells, as proposed by Kleinfelder, if the hydrocarbons are <br /> persistent. <br /> i <br /> 2130 ADELINE STREET.P.O.BOX 24055.OAKLAND.CA 94623.(415)465-3700 <br /> BOARD OFDIRECTORS SANFORD M.SKAGGS.KENNETH H.SIMMONS.HELEN BURKE <br /> JOHN M.GIOIA. WALTER R.McLEAN.NANCYJ.NADEL.MARYC.WARREN <br />