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specific concerns of the Technical Review Committee of the SJCPHS/EHD as stated in their letter dated December 28, 1994 ' 3 1 TASK 1 PREFIELD ACTIVITIES Following approval of this workplan by the SJCPHS/EHD, all drilling permits will be obtained This will occur prior to any drilling operations at the site In addition, a site ' Health and Safety Plan will be prepared to establish the required level of protection and safety procedures to be used at the site This plan will be prepared in accordance ' with Mittelhauser Corporate Health and Safety procedures ' 32 TASK 2 SOIL BORINGS BOREHOLE LOCATION AND DEPTH ' Four soil borings are planned to complete this investigation The locations of these borings are shown on Figure 2 One of the four soil borings, ACS-1 , will be located close to the location of former sample point SW-7 Boring ACS-2 will be located close to the location of former sample point PL-7 in order to determine the vertical extent ' of elevated gasoline constituents at that location. The two remaining borings, ACS-3 and ACS-4, will be installed on the eastern side of the former Unocal station (known ' as the "vacant lot") approximately adjacent to the former location of the USTs and outside the perimeter of the backfilled excavation All of the borings will be advanced ' and sampled to an approximate depth of 10 feet below ground surface (bgs) ' 3.21 Soil Borings - Logging and Sampling ' All borings will be logged by a field geologist under the direction of a California Registered Geologist Boring logs will be prepared using the Unified Soil ' Classification Samples will be retrieved from depths of 5 and 10 feet bgs if groundwater conditions permit Soil samples will be retrieved using the hollow-stem drilling method The auger will be advanced to the desired sampling depth, and the 21SM"I wpWwwwy 1996 2 /qittelhauser c Q n r 0 e n r t 0 H