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A <br /> PUBLi(1 HEALTH SE VICES OPQUfN'•.0 <br /> SAN JOAQUIN COUNTY <br /> )OG] KHANNA NI.D.,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 0 (1601 East Hazelton Avenue) • St CalifornianCalifornia 95201 i65-- <br /> (209) 468-3400 <br /> JONATHAN MARLOWE <br /> MARLOWE PROPERTIES <br /> P 0 BOX 150-211 DEC 10 1991 <br /> SAN RAFAEL CA 95915 <br /> Re: 4648 Waterloo Road IN REPLY REFER TO SnE CODE, 1828 <br /> Stockton CA 95215 <br /> APN# 101-021-32 <br /> San Joaquin County Public Health Services Environmental Health Divisionil(PHS/EHD)has completed review <br /> of the recent submittal entitled Preliminary Report Evaluation of Soil nand Groundwater Contamination <br /> (Report #38033-1)dated August 5, 1988 and prepared by Applied-Geosy,;tems as well as the accompanying <br /> Marlowe Properties letter dated November 13, 1991. <br /> Four underground storage tanks (UST)were removed from San quihck��County Assessor's parcel number, <br /> APN# 101-021-32, on January 4, 1988. The following is an inventory of former underground storage tanks <br /> (UST) located on APN# 101-21-32- <br /> Former Tank #1, 1000 gallons; 4640 Waterloo, Laura Scudders; Site Code: 1929. <br /> Former Tank #2, 550 gallons; 4638A Waterloo, Burruel Electric Site Code: 1827. <br /> Former Tank #3, 1000 gallons; 4642.A Waterloo,Allied Van; Site Code: 1940. <br /> k <br /> Former Tank #4, 550 gallons; 4648 Waterloo, Paragon tures; Site Code: 1828. <br /> The 1987 billing statement for former UST#4(enclosed)was directed micDrroctly to 4638B Waterloo Road <br /> 11 1 <br /> rather than to the correct address 4648 Waterloo Road. The approved closure/removal plan acted as a permit <br /> . <br /> for these former USTIs. A copy of the approval notice is enclosed',for yo6 information. <br /> The contamination associated with former UST#4(benzene less than 500 ppb,toluene 1000 ppb,xylene <br /> 2000 ppb,ethylbenzene <500 ppb,TPH 37 ppm,TPH-gas 40 ppm'.,Iand total lead 74 ppm)was confirmed by <br /> the Ramcon Report dated March 28, 1988. <br /> Further investigation of the contamination associated with 10LIUCr USIA#4 was performed with two soil <br /> borings,B-1 and B-2,drilled on July 7, 1988. B-1 was drilled to 30 Meet and field screening with an OVA did <br /> not indicate contamination at that depth. A bottom sample wast taken��at 30 feet, however the analytical <br /> detection limits were too high for BTXE; (100 ppb instead of 5 ppb) to confirm that no contamination was <br /> present. <br /> Field screening of B-2 with an OVA indicated contamination begfiming at a depth of 30 feet, highest at 45 <br /> feet, and ending at a depth of 75 feet. Two samples collected in B-2, 45 feet and 60 feet, were analyzed. <br /> Contamination was noted at 45 feet(TPH-3.4 ppm,ethylbenzene iOO ppb,toluene 1000 ppb,and xylene 500 <br /> ppb) and at 60 feet (xylene 900 ppb). B-2 was converted into m6ntioring well, MW-1, which is screened <br /> .j p <br /> between 40 feet and 80 feet with a 1988 static water level measurement of 63.59 feet. Groundwater <br /> contamination,TPH 4.92 ppm,benzene 270 ppb,toluene 49 ppb,xylene 230 ppb,and ethylbenzene 5 ppb,was <br /> reported in the Preliminary Report #38033-1,dated August 5, 1988. <br /> A Division of San Joaquin County Health Care Services <br />