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RON <br /> Ms. Carol Oz <br /> Page 2 <br /> March 17, 1992 <br /> SF031604.RP <br /> sample ES-1 was 74.8 mg/kg; however, lead results for the <br /> other soil samples were between 5.96 mg/kg and 12.3 mg/kg and <br /> none of the five samples collected from the bottom of <br /> excavation trenches contained lead in excess of 10 mf/k <br /> g. <br /> The excavated underground piping was triple rinsed with <br /> pressurized steam on the inside and outside. The cleaned <br /> piping was transported as a non--hazardous waste to the Levin <br /> Metal corporation in Sacramento, California for recycling. <br /> All rinsate water was collected in United States Department of <br /> Transportation approved 55-gallon drums. The rinsate water <br /> was transported and disposed of by Romic Chemical corporation <br /> in East Palo Alto, California <br /> Approximately 20 cubic yards of the excavated soil is f <br /> currently situated on and covered by plastic, next to the <br /> excavation trenches. Based on the soil results, the soil <br /> within 2.5 feet below the former gasoline pipes does not <br /> require treatment or disposal. We have recommended that Del <br /> Monte backfill the soil into the trenches. <br /> kr Please call me if you have any comments or questions at (510) <br /> 6528149 (ext. 2118) . <br /> sincerely, <br /> CH2M HILL <br /> Bern Baumgartner <br /> Environmental Engineer <br /> BEB/pipe <br /> cc: Mr. Steven Schneider/PHS <br /> Services <br /> Mr. Wilbur Sp g / <br /> 24r. David Koll/Del Monte Plant 33 <br /> HILL/SFO <br /> Mr. Tim Bray/CH2M <br /> - i <br /> �r <br />