Laserfiche WebLink
R <br /> WE S TERN 1386 FAS IF REAMER STREF 1 <br /> GEO-ENGINEERS WOODLAND CA 95776-6003 <br /> (530) 668-5300, <br /> CALM' CONIRAC I OR#513857 FAX(530)662-0273 <br /> REGISIM-1)GFOLOGISTS wcge@mother coin <br /> January 18, 1999 <br /> Mr John Margowski � ..,�r i- <br /> Wickland Properties <br /> �� <br /> P O Box 13648 1999 <br /> Sacramento, California 95853-4648 ENVIRt NiV1FN1/J_ -`7' --H <br /> (916) 978-2485, FAX (916) 978-2428 PERMIT/ SEF WN,.O� <br /> RE Update Status Report #55, January 1999 Quarterly for former Regal Station #603, 6425 <br /> Pacific Avenue, Stockton, California <br /> Dear Mr Margowski <br /> INTRODUCTION <br /> This update, STATUS REPORT #55, presents data collected from December 10, 1998 through <br /> January 11, 1999 and includes the Quarterly Groundwater Sampling, Vapor Extraction System <br /> Monitoring and Venting of MW8 <br /> SITE LOCA TION <br /> Former Regal Station 4603, was until July 1998 an operating EXXON service station located at 6425 <br /> Pacific Avenue at the northwest corner of Pacific Avenue and Douglas Road, Stockton, in San <br /> Joaquin County, California The site lies in section 21, T2N, R6E, MDB&M at approximately 12 <br /> feet above mean sea level (MSL), see Figures 1, 2 and 3 The parcel is ##31 and is recorded in <br /> Assessor's Book 97 <br /> GROUNDWATER MONITORING <br /> Depths to groundwater measurements were obtained from all monitor wells associated with this site <br /> (MWI, MW2, MW3, MW4, MW5, MW6, MW7, MW8, MW9, MW10, MW11, MW12 andMW13) <br /> on January 8, 1999 The vapor extraction-air sparging system had previously been turned off on <br /> December 19, 1998, no vacuum influence was measured, see Appendix A — Field Notes and <br /> Methods and Procedures Pump rinseate blanks were obtained after sampling the historically hottest <br /> well both days Both samples were below laboratory lower detection limits for TPHg, BTEX and <br /> MTBE Figure 4 represents the groundwater gradient obtained from measurements obtained on <br /> January 8, 1999 and shows a groundwater high at with localized gradient flowing to the cast and <br /> northeast Currently the tops of the well screens are below the top of groundwater(since May 1998) <br /> 1 8603 Update 455 o 1/99 <br />