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�� KLEINFELDER SCOPE OF WORK Task 1 Permittiniz and Pre-Field Activities It has been Kleinfelder's experience that this proposal contains sufficient detail and information to be submitted to PHS/EHD to review and approve a probe/boring permit. Kleinfelder can prepare a probe/boring permit application, a proposed probe/boring location map, and a health and safety plan for submittal along with this proposal to PHS/EHD. Additionally, the permit must be approved prior to advancing soil probes. After obtaining approval from the PHS/EHD, Kleinfelder will commence with the assessment. Please note that PHS/EHD will bill SJRTD directly for oversight on this project. Kleinfelder understands USA has been notified for this project, but will require an updated notification or separate ticket number for the entire site prior to field work. Task 2 Advancement of Push Probes Approximately eight (8) push probes will be advanced near the former tank excavation to assess the lateral and vertical extent of petroleum hydrocarbon impacted soil and to evaluate if first encountered groundwater has been impacted at the subject site. The pushprobes will be advanced to depths ranging from 25 to 50 feet below ground surface (bgs). Approximately six perimeter probes will be advanced and stepped-out approximately 20 to 50 feet from the former tank location. A single dual-tube probe will be advanced near the central portion of the former tank. The dual-tube probe will be advanced into first encountered groundwater, estimated to be 35 feet bgs. A grab groundwater sample will be collected at this location. A second single tube probe will be advanced approximately 50 feet bgs in the central portion of the tank area to assess the vertical extent of petroleum hydrocarbons in soil. Based on initial field observations, the stepped-out placement and probe depths of the pushprobes may need to be adjusted to better evaluate the extent of potential contaminants. The actual sampling locations will also be dependent on access, surface conditions, and potential interference with subsurface utilities. No offsite probes are proposed at this time. Pushprobes will be advanced using a pneumatically driven steel probe. Soil samples will be obtained by inserting a sample barrel, lined with acetate liners, into the probe. The sample barrel will be lowered to the desired sampling depth and driven into the soil. The sample tubes will be removed and sealed with Teflon and tightly fitting plastic end caps. Soil samples will be collected continuously during the advancement of the pushprobes at depths ranging from surface to the proposed maximum depths ranging from 25 to 50 feet bgs. During the advancement of the borings, soil samples will be collected continuously for lithologic classification and subjective observations (soil discoloration and odor). Lithologic classification will be based on the Unified Soil Classification System (USCS). At this time, we propose to submit three soil samples for quantitative chemical analyses from each of the six perimeter borings and a centrally located probe boring. The soil samples 02002PROP.ENV/ST05P174/DH:ly Page A-2 ©2005 Kleinfelder,Inc. May 16,2005