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PUBLIC HtALTH SERVICES pp�'u�M-.rte <br /> SAN JOAQUIN COUNTY - ?, <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 ``��� <br /> 2091468-3420 FILE <br /> COPY <br /> RUTH STRONG <br /> RUTH STRONG PROPERTY <br /> 330 E HOLLYWOOD MAY 0 6 1999 <br /> TRACY CA 95376 <br /> RE: RUTH STRONG PROPERTY SITE CODE: 2054 <br /> 5157 W BUSINESS LOOP 205 <br /> TRACY CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHSIEHD) has reviewed "Quarterly Report— October 1998" for the above <br /> referenced site dated January 15, 1999 prepared by Advanced <br /> GeoEnvironmentai, Inc. (AGE). This report was received by this office on <br /> February 24, 1999. <br /> Six underground storage tanks (UST) were removed at the site in August 1989. <br /> Analyses of soil samples taken indicated the existence of petroleum hydrocarbon <br /> contamination in the soil and groundwater with the highest concentration around <br /> UST # 2, 4, and 5 cluster. Six soil borings were drilled and four monitoring wells <br /> were installed by AGE on July 8, 1998 in a preliminary investigation. PHSIEHD <br /> field staff noted strong petroleum hydrocarbon odor in soil samples collected <br /> from soil boring #4 (B-4) (located in the former dispenser area) at 10 feet below <br /> surface grade(bsg), B-5 (20 feet southwest of the dispenser) at 10 feet bsg, and <br /> B-6 (40 feet north of the former USTs) at 10 and 15 feet bsg. Analytical results <br /> of soil samples collected from B-4 at 10 feet bsg were 420 parts per million <br /> (ppm) Total Petroleum Hydrocarbon as Diesel (TPH-d) and 580 ppm Total <br /> Petroleum Hydrocarbon as Gasoline (TPH-g), B-5 at 10 feet were 11 ppm TPH-d <br /> and 1.6 ppm TPH-g, B-6 at 10 feet were 49 ppm TPH-d and 200 ppm TPH-g, <br /> and monitoring well #1 (MW-1) at 10 feet were 200 ppm TPH-d and 330 TPH-g_ <br /> Analytical results of the water sample collected for the first quarterly sampling <br /> event on July 15, 1998 from MW-1 was 510 parts per billion (ppb) TPH-d. <br /> Analytical results of the water sample collected from MW-2 (20 feet north- <br /> northwest of the former USTs) were 2,400 ppb TPH-g, 1,600 ppb TPH-d, and <br /> less than 0.5 ppb Benzene. Analytical results of the water sample collected from <br /> the MW-2 on October 16, 1998, rose to 5,800 ppb TPH-g, 3,300 ppb TPH-d, <br /> 1,200 ppb Benzene, 52 ppb Toluene, 160 ppb Ethyl-benzene, and 760 ppb <br /> Xylene. <br /> ?,Division of San Joaquin County Health Care Services <br />