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1386 EAST BEAMER STREET <br /> WHO <br /> WOODLAND CA 45776-6003 <br /> �f (530) 668-5300, <br /> FAX(530)662-0273 <br /> w ege d—nolher com <br /> WESTERN <br /> GE4-ENGINEERS <br /> CALF CONTRACTOR#513857 <br /> REGISTERED GEOLOGISTS <br /> Mr Michael J Infurna Jr. February 20, 2001 <br /> Senior REHS <br /> Leaking Underground Fuel Storage Tank Program <br /> San Joaquin County Public Health <br /> Environmental Health Division(PHS-EHD) <br /> 304 East Weber Ave , Third Floor <br /> Stockton, CA 95202 <br /> (209) 468-3454 <br /> RE Workplan for defining the off-site TPHg plume laterally and vertically at former Regal Station <br /> R603 at 6425 Pacific Avenue, Stockton, California 95207. <br /> Dear Mr Infurna- <br /> INTRODUCTION <br /> Tlus site is being considered for closure Mr Marty Hartzell of the California Regional Water <br /> Quality Control Board, Central Valley Region(CRWQCB-CVR) stated the following concerns <br /> • The lateral and vertical extent of groundwater contamination has not been defined; <br /> • The groundwater has not been monitored for all fuel oxygenates and fuel additives, <br /> • The status of domestic water supply well southeast of the site has not been determined, and <br /> • The quarterly groundwater monitoring has not been conducted since January 1999 <br /> The following workplan has been developed to define the lateral and vertical extent of groundwater <br /> contamination east (downgradient) of MW12 The other three concerns are addressed and <br /> presented in Appendix B <br /> i <br /> a <br /> _r <br /> 2 R-603 extent WP 2-2001 <br />