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SUMMARY OF PRIOR WORK: <br /> July, 1996 - A 2,000 gallon gasoline UST, product lines and dispensing pump were <br /> removed from the property. After taking samples, the removed soil was returned to the <br /> hole; pea gravel was added to fill-the excavation, and the site was compacted and covered <br /> with asphalt. TABLE 1 summarizes the results of the laboratory analyses of the soil <br /> samples taken after tank removal. Minor amounts of toluene, ethylbenzene, xylene, and <br /> MTBE were detected; TPHg and lead were not identified. <br /> January, 1997 - A "push-type" geoprobe unit was mobilized on the site at the <br /> approximate location shown on PLATE M. Soil vapor samples were taken at 15', 30', & <br /> 45', and a water sample was taken at 46'. BTEX & TPH were measured in all soil vapor <br /> samples. Toluene, ethylbenzene, xylene, and TPH were identified in the water sample. <br /> MTBE was below detection limits in both soil vapor and water samples. The results of <br /> those analyses are summarized on TABLE IL <br /> WORKPLAN FOR PLACING ONE SOIL BORING AND ONE 2" GROUND <br /> WATER MONITORING WELL: <br /> 1. Mobilize properly licensed auger rig on the locations shown on PLATE IV. Rig to be <br /> equipped with sufficient hollow-stem augers to drill to 80' bgl without having to <br /> decontaminate flights. Equipment to include at least two (2) split-spoon samplers and <br /> sufficent metal sleeves to complete project. <br /> Soil Boring: <br /> I. Soil samples will be taken at 5 foot intervals beginning at the first native soil <br /> encountered beneath tank fill, and every 5' it�'` the Geologist in charge. <br /> Although groundwater is anticipated at ab t 60'below oil sampling may continue <br /> beyond that depth depending upon results o screening of samples. <br /> 2. Soil samples will be described by the Geologist, and selected samples will be preserved <br /> for laboratory analysis. A portion of each core will be placed in a sealable plastic bag and <br /> screened for hydrocarbon vapors with a PID meter or similar device. <br /> 3. Water samples may be collected during coring operations by use of a hydropunch or <br /> similar device. All samples will be properly sealed, labeled, and preserved for transport <br /> under,chain of custody to a State Certified laboratory for analysis. <br /> 4. After reaching final depth as determined by the Geologist and SJ Co. EHD representa- <br /> tive. the soil boring will be grouted from bottom to the surface with a- entonite <br /> slurry placed with a flexible hose or similar equipment. <br /> 3 <br />