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grade. Soil samples will be collected at five foot intervals between the depths of 5 and 50 feet. Drilling will be conducted by Osterberg and Stewart under C57 license 446670 using a hollow stem auger drill rig. Drill cuttings will be logged continuously for characterization of soil type utilizing the Unified Soil Classification System. Obvious soil discoloration and hydrocarbon odors will be utilized to determine soil contamination in the field. Descriptions of the soils encountered will be recorded on boring logs and included within the assessment report. All drill cuttings will remain on- site, covered with plastic sheeting, pending return of laboratory results. Disposal of these materials will be addressed in the revised Soil Remediation Plan. WaterWork anticipates beginning the activities described in this workplan within 5 days of approval by the SJCEHD. The soil borings should be completed within one and a half days of mobilization to the site. This time estimate is dependent upon the availability of the drilling contractor, the occurrence of good weather, and other factors including client needs and site specific conditions. The soil samples collected from the site will be handled in accordance with WaterWork ' s Soil Sampling Protocol (Appendix C) . Drive samples collected from the borings will be analyzed for BTX ( EPA 8020 ) , TPH as gasoline (DOHS method) and tetra ethyl lead ( DOHS method ) . The analyses will be conducted by Sequoia Laboratories, a State certified laboratory. A revised Soil Remediation Plan will be prepared according to Regional Board guidelines which incorporates the results of the soil sampling and logging. 4.0 Groundwater Sampling Plan The seven existing monitoring wells at the site will be monitored and sampled on the same day. The free product level ( if any ) , static water level and the total well depth will be measured prior to purging using an optical interface probe. The probe will be cleaned between measurements. All well locations are shown on Figure 1. Wells will be purged using a pneumatic pump to remove at least four well volumes. The sufficiency of purging will be determined by the stabilization of pH, temperature and electrical conductivity which will be recorded on a field log. The purged water will remain on site in secured, labeled 55 gallon drums until laboratory results are received. A proposal to treat or dispose of the water will then be submitted to the Environmental Health Department. Water sample collection and preservation will be in accordance with the Groundwater Sampling Protocol contained in Appendix C. The water samples will be analyzed by Sequoia Laboratories for BTEX and Total Petroleum Hydrocarbons by EPA method 503 . 1 . These sample results will be included in the 2