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T. <br /> _ <br /> V 04 <br /> F ,r <br /> r 3. The dimensions of the excavated pit were approximately 12 feet <br /> ' by 12 feet by 10 feet deep. Approximately 35 yards of soil were <br /> excavated. <br /> Four in-situ soil samples were tai:en by FGL Labs fallowing <br /> excavation to determine further extent of contamination. Figure 4 <br /> shows the four sample locations. Test results dated December 12, <br /> 1990 showed no further contamination (Exhibit #3) . All four sample <br /> values were recorded at non-detectable limits. Upon receipt of <br /> these results, Mr. Knoll approved Public Works to fill in the <br /> excavated pit with clean soil. <br /> The excavated material was then spread to a thickness of <br /> approximately 8" on an impervious plastic layer located near the <br /> tank removal site (Figure 5) . The soil was turned periodically for <br /> r # <br /> approximately three weeks before being tested. The soil was then <br /> I sampli;d on January 11, 1991 by FGL Labs. Two composite samples were <br /> taken. 'fest results dated January 22, 1991 showed a diesel #2' <br /> concentration of 6.1 mg/kg in one sample, and 1.6 mg/kg in the <br /> ( second sample (Exhibit #4) . <br /> The Department of Public Health Services mandated that the soil be <br /> removed and disposed of at a properly permitted site. The <br /> Department of Public Works subsequently submitted a,i application <br /> for disposal (Exhibit #5) of the diesel ::contaminated soil at <br /> 5f Forward Inc. , a properly permitted disposal site. Forward required <br /> L a more comprehensive test of the contaminated soil before it could <br /> be accepted at its disposal"site. <br /> ' -•is <br /> Sampling for the test required by .Forward was conducted by FGL � . <br /> Labs on February.28, 1991. Two composite samples were taken Test <br /> r results dated. March 'll and March 19, 1991 (Exhibit #6) showed that. <br /> tz, FA <br /> both 'samples taken exhibited non-detectable levels for all tested <br /> EE contaminants including diesel #2. <br /> It should' be noted that all remedial operations.. including <br /> excavation and sampling were attended by a representative from the . <br /> Environmental ,Health Division of the San Joaquin County Department <br /> of . Public Health Services. It should also be noted that the <br /> v sampling technique as well as all sample locations .were approved . <br /> b the Department of Public HealthServices <br /> Y: representative.p <br /> i f <br /> Recommendation. ; <br /> The Department of Public Works has requested that the Department <br /> e of Public Health Services allow Public Works to use the soil for <br /> road maintenance at its Harney Lane Landfill. <br /> � x <br /> EN,NO 01116111111 ME <br /> j <br />