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• September 5.2001 1.0 INTRODUCTION This Remedial Investigation Feasibility Study (RIFS) Workplan (Workplan) has been prepared to perform initial site investigation at the former Busy Bee Cleaners (Site), 40 N. Main Street, Lodi, California. Based the results of this initial investigation, additional investigation and/or remediation may be required at the Site. As proposed, this RIFS will occur in several phases of work as follows: • Phase 1 — Initial investigation to assess if a problem, such as soil and/or groundwater contamination exists; • Phase 2 — If a problem is found in Phase I, Phase II consists of defining the extent of the problem, or contamination, in two directions, vertically and areally; in addition, the magnitude of the contamination concentration-wise, both vertically and areally, is also defined; • Phase 3 — Once Phase II is complete and the full extent and chemical magnitude of the contamination has been defined, then remedial alternatives can be identified and evaluated based on the type, extent and chemical magnitude of the contamination. Remedial alternatives that are deemed feasible are then selected and evaluated using a suitability/cost matrix. The eventual selection of the recommended remedial technology will be the final product of this work. 1.1 Phase 1 Purpose The investigation described in this workplan has the following objectives: • Assess existing soil conditions at the Site and property adjacent to the Site (with owner's written permission); • Assess groundwater conditions beneath the Site; • Recommend appropriate further action for the Phase II portion of the RIFS, if warranted. 1.2 Scope of Work • The scope of services described in this Workplan include: • Locate underground utilities using Client's as-built drawings (if available) as well as Underground Service Alert (U.S.A.); • Obtain necessary permits and/or regulatory approvals; • Advance five (5) drilled soil borings and one (1) hand-auger boring at the locations shown on Figure 1; Note: the drilled borings will be advanced to groundwater whereas the hand-auger boring will be advanced to approximately 20 feet bgs; • Collect soil samples at 5-foot intervals beginning at five feet below ground surface (bgs) and continuing until total depth. The samples will be collected using brass or stainless steel sleeves; • Field screen samples for volatile organic compounds (VOCs) using a hydrogen flame- ionizing detector (FID); • Secure soil samples in sleeves sealed with Teflon, end caps and tape. The sealed tubes will be placed in a cooler at 40 centigrade and transported to a DHS certified laboratory under Chain-of-Custody procedures. Selected samples will be chosen for chemical analysis; E2C Remediation, LLC 1