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90343TEXT CON-2 • • <br /> 3. Goggles or safety glasses; <br /> 4. Hard hats; <br /> 5. Respirators; and <br /> 6. Long sleeve shirt or coverall . <br /> The protective clothing described above (with the exception of the <br /> respirators) was required to be worn by personnel involved with drilling <br /> and sampling. <br /> The following monitoring equipment were used during drilling <br /> operations: <br /> a. An AID organic vapor meter (OVM) , with photo ionization detector. <br /> b. An explosimeter. <br /> The OVM was used to monitor the concentration of organic vapors. In <br /> general , readings were taken in the breathing zone whenever augers were <br /> added during drilling. The explosimeter was used to monitor for explosive <br /> conditions that might develop during drilling operations. No significant <br /> levels of organic vapors were detected during drilling operations. <br /> Drilling and Sampling <br /> The drilling was conducted on August 6, 1986 at which time four borings <br /> (B-1 through B-4) were advanced to a depth of 20 ft. Locations of these <br /> borings are shown in Figure 1. A Mobile B-53 drill rig equipped with both <br /> 8 and 10 inch outside diameter augers was used to install the borings. <br /> Observations of soil types from the cuttings and samples, hydrocarbon odor <br /> detection, and sample locations were noted on the boring logs which are <br /> appended to this report. The purpose of the borings was to assess both the <br /> vertical and horizontal extent of contaminant migration. Groundwater was <br /> estimated to be situated approximately 9 to 10 ft. below grade. <br />