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LAMBRIA WORK PLAN Technical Rationale for Proposed Scope of Work • The February 2000 site investigation identified MTBE in groundwater beneath the site, and its lateral extent has not been delineated. • The City of Lodi Well No. 12 is located in the southwest corner of the property. Two monitoring wells (MW-7 and MW-8) are proposed between the dispenser islands and the municipal well (Figure 2). • A former Chevron Station is located upgradient of the subject site. One monitoring well (MW-6) is proposed in West Kettleman Lane to address the potential of MTBE migration from the former Chevron (Figure 2). Work Tasks i Permits: An appropriate permit for drilling will be obtained from SJCPHS/EHD for all wells, and an encroachment permit will be obtained from the California Department of I Transportation for well MW-6. Health and Safety Plan: A site-specific Health and Safety Plan will be prepared for field 3 work. Utility Clearance: Proposed drilling locations will be-marked and their locations cleared through Underground Service Alert (USA) prior to drilling: Site Investigation: Three exploratory soil borings (MW-6 through MW-8) are proposed as shown on Figure 2. The borings will be drilled using hollow-stem auger equipment and will be converted to groundwater monitoring wells. The scope of work described.in this work plan will be performed under the supervision of a registered geologist. A Cambria geologist will supervise the drilling and describe encountered soils using the Unified Soil Classification System and Munsell Soil Color Charts. Soil samples will be collected at five-foot intervals for lithologic description, possible chemical analysis, and organic vapor screening with a photo-ionization detector (PID). PID readings will be recorded on the boring log for each boring. 1346 3