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I EAST BAY WALTERJ.BISHOP <br /> MUNICIPAL UTILITY DISTRICT MANAGER OF WASTEWATER <br /> August 6 , 1990 <br /> Mr . Ron Valinoti , Director ECEIVED <br /> Environmental Health Division <br /> San Joa uin County, Public Health Services <br /> P. o. Box 2009 y AUG I 0 1990 <br /> Stockton, CA 95201 ENVIRON-MENTAL HEALTH <br /> Dear Mr . Valinoti : PERMIT/SERVICCES <br /> Re: EBMUD Stockton Center .- Site Code 1169 <br /> Based on the sampling analysis resultsreported to you-on -Jun-e -5-; - <br /> 1990 , the District is proposing to install additional groundwater <br /> monitoring wells at the Stockton •Center to fully define. the <br /> extent of the contamination. <br /> The District proposes installing four additional groundwater <br /> monitoring wells in the down-gradient direction. A map showing <br /> the tentative locations is attached. The actual locations of the <br /> wells will be selected in the field. <br /> The construction' details of the ground water monitoring wells <br /> will be the same as submitted in the original work plan for the <br /> site . The monitoring wells will be developed after installation. <br /> Initial sampling will occur approximately one to two weeks after <br /> development to allow the formation to stabilize . Each well will <br /> be sampled for Total Petroleum Hydrocarbons, Benzene, Toluene, <br /> Ethylbenzene and Xylenes . The three existing wells will be <br /> sampled at the same time as the new wells. <br /> All sample results will be reported to your office as well as the <br /> Central Valley Regional Water Quality Control Board. <br /> Please advise the District if the proposal submitted is <br /> acceptabl_e . .- The D.i_strict will,_proceed to install_the monitoring <br /> wells once your approval is received. <br /> If you have any questions regarding the proposal , please contact <br /> Karen Folks at ( 415 ) 465-3700, extension 221 . <br /> Sin erely, <br /> J <br /> Sr � <br /> OEPH G. DAMAS <br /> Manager of Source Control <br /> JGD:BBH:bbh <br /> Enclosure <br /> i <br /> cc: CVRWQCB, Attn: Gordon L. Boggs <br /> 2130ADELINE STREET.P.O.BOX24055.OAKLAND.CA 94623.(415)465-3700 <br /> BOARD OF DIRECTORS SANFORD M.SKAGGS.KENNETH H.SIMMONS.HELEN BURKE <br /> JOHN M.GIOIA. WALTER R.McLEAN.NANCYJ NADEL.MARY C..WARREN <br />