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PUBLIC HEALTH SERVICESo* ...� <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION 0 ?'=� <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> ALFRED F CALDRON <br /> C (OPY <br /> CALDRONS GENERAL STORE <br /> 12750 W BYRON RD MAR 14 1994 <br /> TRACY CA 95376 <br /> RE: Caldron's General Store SITE CODE: 1531 <br /> 12750 W Byron Rd <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD)has <br /> reviewed the January 1994 report of Soil Excavation for the above referenced site prepared <br /> by Geological Audit Services, Inc. <br /> Laboratory analysis of the sidewall samples taken during the over excavation indicate that <br /> all contaminated soil has been removed. The 150 yards of contaminated soil has been <br /> stockpiled on site in three locations pending remediation procedures. One stockpile was <br /> placed within 10 feet of the site drinking water well. PHS/EHD recommends that the soil <br /> stockpile be removed from the well location prior to remediation of the stockpile. Please <br /> submit a workplan to PHS/EHD within 30 days of the date of this letter regarding <br /> remediation of all the contaminated soils. <br /> Due to the presence of groundwater in the excavation at both the time of the tank removal <br /> and during the over excavation�a groundwater investigation is required. There is currently <br /> an approved workplan and a permit for installation of three 2 inch PVC monitoring wells. <br /> Installation of the monitoring wells shall begin within 30 days of the date of this letter. <br /> The detection limits used for the analysis of groundwater samples from the monitoring wells <br /> shall be Benzene, Toluene, Ethylbenzene, and Xylene .5 parts per billion (ppb); total <br /> petroleum hydrocarbon-gasoline (TPH-g) 50 ppb. In addition, water from the on site <br /> domestic drinking water well shall be sampled and analyzed for TPH-g and BTEX at the <br /> same detection limits as the on site monitoring wells. <br /> A well survey showing the location of all domestic, agricultural and municipal wells within <br /> 2,000 feet of the site has not been submitted to PHS/EHD please include this in the next <br /> report. <br /> PHS-EHD has reviewed the laboratory analysis of the soil sample obtained from the <br /> drainage ditch. The analysis revealed the contaminants to be motor oil and diesel with a <br /> trace of gasoline. According to our underground storage tank (UST) file, the USTs at this <br /> A Division of San Joaquin County Health Care Services <br />