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under the supervision of a Smith Environmental field geologist All site work was performed in accordance with the Quality Assurance/Quality Control Plan and the Site Safety and Health ' Plan included in Smith's "Workplan for Site Investigation" (August 1994) and workplan ' addendum (September 1994) In addition, samples were collected from the three existing monitoring wells on site and analyzed as part of the quarterly monitoring program ' FIELD INVESTIGATION Soil Borings On August 14 and 15, 1995, three soil borings (MW-4, MW-5 and MW-6) were advanced to ' depths of approximately 44 feet in locations upgradient and downgradient from former the USTs (Figure 2) The bonngs were advanced using 10-inch outside diameter hollow stem augers All drilling was performed by Spectrum Exploration, Inc (Spectrum, C57 #512268) Clean augers were used to drill each boring Dnll cuttings were placed on and covered with plastic sheeting ' and stored on site pending laboratory analysis Soil samples were collected at five foot intervals and field screened with an photoionization detector (PID) for evidence of semivolatile and ' volatile organic compounds PID readings were uniformly low, less than 4 5 parts per million (ppm) for MW-4 and MW-5 Samples collected from MW-6 at depths of 30 to 31 feet and 31 ' to 36 feet bgs showed PID readings of 15 4 ppm and 14 2 ppm, respectively Groundwater was encountered in the borings at depths ranging from 25 to 29 feet below ground surface (bgs) The soil samples collected at depths of 25 feet bgs in each boring (MW-4, MW-5 and MW-6) ' were submitted to Argon Laboratories in Modesto, California (DOHS No 1875) using chain of custody documentation The samples were analyzed for total petroleum hydrocarbons as ' gasoline (TPHg), benzene, toluene, ethylbenzene and xylenes (BTEX) using EPA methods 5030/8015/8020 Soil analytical results are contained in Table 1 W \1500781REPORTSIPAR � • � SMTH