Laserfiche WebLink
RECEIVED <br /> Harding Lawson Associates 7 ,+ 1991 <br /> NOVISI V 15t 1 <br /> November 6, 1991 <br /> ' 17060, 025 . 03 <br /> ' The Southland Corporation <br /> 5820 Stoneridge Mall Road, Suite 310 <br /> Pleasanton, California 94588 <br /> ' Attention: Mr. Hal Miller <br /> Manager, Environmental Services <br /> ' Gentlemen: <br /> i' Results of Third Quarter Monitoring, 1991 <br /> 7-Eleven Convenience Store <br /> 455 Grant Line Road <br /> Tracy, California <br /> This letter reports the results of groundwater monitoring by <br /> Harding Lawson Associates (HLA) for the third quarter of 1991 <br /> at the 7-Eleven convenience store, 455 Grant Line Road in <br /> � Tracy, California. The site is shown on Plate 1. This <br /> report describes the field procedures used and presents the <br /> ' results of chemical analyses, comparing them with previous <br /> chemical data for the site. <br /> BACKGROUND <br /> HLA was retained to perform a soil and groundwater <br /> I� investigation at the 7--Eleven store in November 1987, <br /> ## following an underground tank leak. As part of that <br /> Investigation, we installed 15 monitoring wells on and <br /> ' immediately ad3acent to the site (Plate 1) . The results of <br /> our multi-phased investigation were submitted in a "Problem <br /> Assessment Report" (PAR) dated January 10, 1989 , to the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) <br /> f1 and the San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) . That document also <br /> Included the results of a feasibility study and <br /> recommendations for remediation. <br /> In March 1989 , the underground tanks and fuel dispensing <br /> ' facilities were removed from the site. During these <br /> activities MW-A and MW-7 (formerly MW-B) , near the tank <br /> backfill, were destroyed. The remaining 14 HLA wells were <br /> left intact. <br /> Engineering and 1355 Willow Way Suite 109 Contort! CA 94520 5101687 9660 <br /> ' Env ronmenial Services A 5ubs4diary of Harding AS Ocja7es • Off,,,,,Narronwrde <br />