Laserfiche WebLink
PACIFIC <br /> ENVIRONMENTAL <br /> GROUP INC: <br /> SEP 1. o 1996: - <br /> ENVIRONMENTAL HEAMJ <br /> PERMIT/SERVICES <br /> September,9, 1996. <br /> Project 310-097.1B <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services_ <br />` Environmental Health Division- <br /> .304 E. Weber Avenue, Third Floor <br /> P.O. Box 388 <br /> Stockton, California 95201-0398,, <br /> Re: 'Corrective Action Plan <br /> Former Unocal Service Station,0123 <br /> .1034 Central Avenue at Llth Street . . <br /> Tracy, California <br /> Dear Mr, Infurna: <br /> This corrective action plan has been prepared on behalf of Unocal Corporation (Unocal)to <br /> present procedures to be used, if necessary, during the removal of two underground fuel <br /> storage tank (UST),at the site.referenced above., Should hydrocarbon-impacted soils be <br /> encountered within the UST excavation, Unocal'm i y proceed with limited over-excavation as ' <br /> a corrective action to remediate subsurface soils. Possible corrective action procedures to be <br /> implemented are described below. <br /> CORRECTIVE ACTION PLAN <br /> Background <br /> -The site is located on the southeast corner.of the intersection of Central Avenue and Eleventh <br /> Street in Tracy, California. The"asphalt-paved property currently serves as a parking lot for a <br /> Wells Fargo Bank. Land usage in the site vicinity is primarily retail and commercial. Three <br /> on-site groundwater monitoring wells were installed in 1995 to assess groundwater <br /> conditions. Diesel- and gasoline-range hydrocarbons have been detected in.these wells. <br /> Groundwater occurs.at approximately 10 feet below grade. <br /> Two.underground storage tanks have been shown to remain,beneath the sidewalk adjacent to" <br /> Eleventh "Street, in the north central portion of the"site (Figure 1). These tanks appear to be <br /> theeasternmost tanks of the original fuel storage to ik cluster, which was in service from <br /> approximately 1921 to 1950. The remaining tanks are of 550-gallon capacity, single-�walled' <br /> 205 Gateway Place, Suite 440, San Jose,California 95110 (408)441-7500 FAX(408)441.-7539 <br />