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30 May 2000 AGE-NC Project No. 97-0372 Page 9 of 17 regulatory expenses. AGE reports will be submitted to both agencies. An authoritative sampling strategy will be followed to assess areas of known or suspected activities for contaminants most likely to impact the subsurface media. To meet the objectives of both the PHS-EHD and the DTSC, the following scope of work was derived from the 14 March 2000 meeting. Miscellaneous Storage and Tank Storage Area • Advancement of two soil borings to 25 feet bsg in the vicinity of the previously excavated and backfilled soil in the driveway to obtain soil samples for confirmation analysis for lead, nickel, cobalt, copper, chromium, and cyanides (the target metals); This is an area that has had a known release of waste water that required excavation. The two borings are required to collect soil samples directly beneath the former floor of the excavation and at a 5-foot greater depth for analysis to confirm removal of potentially impacted soil. The first encountered native soil sample from each boring will initially be analyzed for pH and target metals. • Advancement of one soil boring to 20 feet bsg in the vicinity of the sump hole in the former tank storage area to collect soil samples for analysis as noted above. The sump hole was located under a valve in the tank. The unlined sump hole provides a potential vertical migration path for contaminants to enter the subsurface from any releases from the tank or tanks formerly located in the area. Samples will be collected at 2 feet, 5 feet, 10 feet, 15 feet and 20 feet bsg. Selected samples will be analyzed for pH, cyanides and the target metals note above. Only one shallow sample will be initially analyzed. • Advancement of two additional soil borings randomly located to sample shallow soil for pH, the target metals and cyanides. Total depth of borings will be 15 feet, with samples collected at 2 feet, 5 feet, 10 feet and 15 feet bsg. Municipal Well Area • Advancement of one soil boring to first water in the vicinity of the municipal well to obtain a continuous core from surface to total depth and to collect soil and ground water samples. The water sample will be analyzed for the target metals, volatile organic compounds (VOCs) and pH; the continuous soil core will be utilized to identify permeable subsurface pathways from the site to the well bore. If needed, shallow soil samples may be analyzed as background samples as shallow soil is not likely to have been impacted by operations on the RV Circuits site. As noted above, the measured depth of static water level in the inactive municipal well on the adjacent property was 30 feet Also as noted in Section 2.2 above, the drilling log for the California Water Service well on the adjacent site shows yellow clay from near surface to 26 feet below surface grade (bsg); from 26 feet to 30 feet bsg the log shows `boulders'. The `boulders', if encountered, may make obtaining the proposed total depth and Advanced GeoEnvironmentnl,Inc