SITE HISTORY - Laserfiche WebLink

Home Browse Search

Tank Removal Report Thiels Goodyear Tire and Rubber Company, 1131 Holly Drive Tracy, California SEMCO was contracted by HMR Ranch to remove one 550-gallon waste oil underground storage tank (UST) from the commercial site at 1131 Holly Drive in Tracy, California. This report summarizes the activities associated with this removal. A copy of the State Underground Storage Tank Permit application and City of Tracy Building Permit is in the Appendix. On December 9, 1996, SEMCO removed the concrete slab above the tank and the soil surrounding the upper half of the tank. Excavated material was stockpiled onsite. The residual product in the tank was pumped into a 55-gallon DOT drum and the tank was subsequently rinsed with a high pressure, hot water wash. The rinse water was pumped into the drum containing the residual product and a second 55-gallon DOT drum. The contents of the two 55-gallon drums (approximately 80-gallons) was transported by Allied Petroleum to the Americiean facility in Silver Springs, Nevada. A copy of the waste manifest is in the Appendix. Twenty pounds of solid carbon dioxide (dry ice) was added to the tank immediately prior to removal to purge any potentially combustible vapors from the tank. A copy of the dry ice receipt is in the Appendix. The tank was removed when the vapor screening equipment indicated the oxygen and combustible vapor concentrations in the tank posed no explosive hazard. Tank removal, loading, and soil sampling activities were observed by Mr. Jerry Yoshioka of the San Joaquin County Environmental Health Division, and a representative from the City of Tracy Fire Department. The UST was a single-walled steel tank. it appeared rusted and three holes were observed in the tank. The upper one foot of soil surrounding the tank was discolored. No odor or discoloration was observed in soil greater than 1 foot below ground surface (fbgs). Three soil samples were collected. Two samples were collected from the tank cavity. One from the northeast corner of the excavation at approximately 1 fbgs and one from the bottom of the pit in the middle of the excavation at a depth of 9 fbgs (Pit Bottom@9). Soil sample SP 1-4 represented a four point composite sample collected from the excavated soil stockpile. The soil samples were labeled, entered onto a chain of custody, placed in an iced cooler, and transported to the North State Environmental state-certified laboratory. Samples Pit Bottom@9' and SP 1-4 were analyzed for total petroleum hydrocarbons as diesel (TPH-d; EPA Method 8015", TPH as gasoline (TPH-g; EPA Method 8015M), total extractable petroleum hydrocarbons (TEPH; EPA Method 5520F), benzene, toluene, ethylbenzene and total xylenes (BTEX; EPA Method 8020), nickel (EPA Method 7520), zinc (EPA Method 7950), chromium (EPA Method 7190), cadmium (EPA Method 7130), and lead (EPA Method 7420). Sample Pit Bottom@9' was additionally analyzed for volatile organic compounds (VOCs; EPA Method 8240) and semi-volatile organic compounds (SVOCs; EPA Method 8270). Soil sample 1