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2.0 DRILLING AND SAMPLING PROCEDURES Field work for this phase of investigation took place on three occasions: November 4 and December 2, 1995 and January 6, 1996. On November 4, a Mobile Drill B-61 truck-mounted drilling rig equipped with hollow-stem augers was mobilized; however, the truck bogged down in the turf and could not reach the drill site identified by Mr. Michael Infuna of EHD. Therefore, three shallow borings (SP-7 through SP-9)were drilled using a hand auger(Figure 4). The borings were drilled to a depth of 6 feet. The auger was used to collect a soil sample from the bottom of each hole in brass sample sleeves. The sleeves were sealed with Teflon sheets and plastic end caps and placed in a cooled ice chest. They were transported to Sequoia Analytical Laboratories and analyzed for pesticides(EPA method 8080). On Decemeber 2, a Little Beaver hydraulic drilling rig was used to drill boring SP-10 (Figure 4). This boring was located one foot southeast of SP-8. SP-10 was drilled to a depth of 15 feet. Soil samples were collected through the 3-inch-diameter augers in 1-inch-diameter plastic sample sleeves measuring 2 feet in length. Three samples were collected, at depths of 6-8 feet, 9-11 feet, and 15-17 feet. The bottom sample was wet when collected. Groundwater entered the boring and stabilized at a depth of 9 feet. A plastic bailer one inch in diameter and 2 feet in length was used to collect a groundwater sample in two 1-liter amber bottles and three 40-m1 glass vials. All samples were placed in a cooled ice chest and transported to Sequoia Analytical. They were analyzed for Total Oil & Grease (EPA method 418.1)and Chlorinated Hydrocarbons(EPA 8010). On January 6, the same procedures were used to drill SP-11 in the same vicinity(Figure 4). Water was encountered at 9 feet, and therefore soil samples were collected at 6-8 feet and 9-11 feet. A water sample was also collected. Sequoia analyzed these samples for Total Petroleum Hydrocarbons as diesel (EPA method 3550/8015) and pesticides(EPA 8080). 3.0 RESULTS The laboratory report is included in Appendix A. As summarized in Table 1, no recoverable hydrocarbons (oil & grease) or halogenated hydrocarbons were detected above reporting limits in soil samples from SP-10. Extractable hydrocarbons (Total petroleum hydrocarbons in the diesel range) were detected by EPA 8015 at concentrations of 1.4, 1.9, and 1.1 mg/kg(parts per million) in samples from SP-10 and at concentrations of 2.8 and 3.5 mg/kg in samples from SP-11. No pesticides were detected in either sample from SP-11 above reporting limits. As shown in Table 2, neither chlordane nor DDT was detected in the water sample from SP-11; however, Heptachlor epoxide was detected at a concentration of 0.40 ug/1 (parts per billion), slightly less than twice the reporting limit for this pesticide. No recoverable hydrocarbons were detected above the reporting limits in either water sample, but extractable hydrocarbons were detected in both samples.