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a <br /> I <br /> i <br /> I <br /> 1 <br /> l� <br /> O.E.S. - stocker n Platinar g 2991 <br /> I�h Pago _+- <br /> r <br /> 5,.. Eric Trevena of the San Joaquin County Environmental Health <br /> I � <br /> Department was an site to obsorve the tank removal and sampling <br /> w <br /> procedures. The tank was in pi,5ir condition and extremely <br /> ,.. corroded on the east end. A hole, approximately 1 centimeter in <br /> diameter, was located at the bottom east end of the tank. The <br /> I native soil consisted. of brown, clayey silt and was overlain by a <br /> 2-foot layer of asphaltic fill/debris. A strong petroleum. odor <br /> J was :noted In the brown, clayey silt beneath the tank. No <br /> _ groundwater was encountered in the excavation. <br /> a <br /> Two sail samples were collected fro, beneath the former tank <br /> site, one from each e,nd. The two samples were analyzed for ben- <br /> zene, toluene, ethyl benzene, and xylene (STEX) by EPA Method <br /> 8020, for total petroleum hydrocarbons-gasoline (TPH-G) by Method <br /> ;.I 5030/Mod.8015, for ethylene dibromide (EDB) by Method 504, and F <br /> for tetraethyl lead (TEL) by Method DHS-LUF:T. <br /> i Gasoline and gasoline constituents (BTEX) were detected in <br /> h. <br /> the sail samples. Total petroleum hydrocarbons (TPH•-G) were <br /> detected at 3300 mg,!kg, and 2800 mg/kg. various concentrations <br /> of benzene toluene, ethyl benzene, and lens were detected in <br /> i � r Y xylene <br /> ' both samples. Tetraethyl lead (TEL) and ethyl dibromide (EDB` <br /> •� were not.detected in the soil samples. <br /> Condor rec e a <br /> ). <br /> L omm tided th t four soil br;rings he drilled around <br /> 77 ---- )--- u' - <br /> the-TK1-90--site-to--j:.nvestigate--the-vertical-and-horizonta3.-e ent - ----� ------- <br /> CONDOR <br />