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GEORGE DEUKMEJIAN,Govetnol <br /> STA{OF CALIFORNIA <br /> CALIFORNIA REGIONAL WATEk,.-2LIALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION ®, <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> 4 August 1988 <br /> � ua a �gaa <br /> ti <br /> ENVIROMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Don Gagnon <br /> Gold Bond Building Products <br /> 800 West Church Street <br /> Stockton, CA 95203 <br /> REQUEST FOR VARIANCE FROM THE MONITORING ALTERNATIVES IN THE <br /> UNDERGROUND TANK REGULATIONS FOR THREE TANKS AT THE GOLD BOND <br /> BUILDING PRODUCTS FACILITY IN STOCKTON, CALIFORNIA <br /> We have examined the proposal for a variance prepared by American <br /> Environmental Management Corp. and discussed it with San Joaquin <br /> Local Health District to assure that the proposal meets local as <br /> well as state requirements. We agree that the large tank can not <br /> be tested with conventional precision tank testing methods, so a <br /> variance to the existing California Regulations for monitoring <br /> underground storage tanks is appropriate. However, before we can <br /> complete our review, Gold Bond must provide data to support the <br /> request. Our review shows that some details were omitted which <br /> must be addressed and submitted in a completed report. Following <br /> are subject areas to be discussed: <br /> - How will the line connecting the large tank to the two smaller <br /> tanks be monitored? <br /> - Provide figures and maps which indicate the basis for location <br /> of monitoring wells (MW) and specifics of MW construction such <br /> as depth, depth of screened interval, screen size, filter <br /> pack, etc. , <br /> - A 1" = 25 ' scale map which shows the tank sizes and locations <br /> on the property as well as the monitoring system location is <br /> to be included in the report. <br /> - The proposal states that two MWs will be installed near the <br /> large tank, one upgradient and one downgradient. However, <br /> according to Regional Board staff, the closest MW is about <br /> 1100 feet north of nearest tanks to be monitored, so the local <br /> gradient around the tanks to be monitored has not been <br /> determined. (A minimum of three wells are necessary to solve <br /> a "simple" gradient direction problem) . <br />