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Shell SITE INVESTIGATION WORK PLAN State of California certified laboratory for analyses. A standard 2-week turn-around time will be requested for laboratory results. Drill cuttings and any liquids generated during the investigation will be stored in 55 gallon steel drums or roll off bins, labeled, and sealed for temporary storage pending receipt of analytical data and profiling for disposal. The shallow zone groundwater monitoring well proposed north-northeast of boring B-109 will to be screened from approximately 30 to 50 ft bgs, matching the construction of well MW-15.Actual well construction details may change based on soil types and field conditions encountered during drilling. The well will be constructed using 2-inch diameter Schedule 40 PVC casing. A filter pack will be placed from the bottom of the well screen up to 2 feet above the top of the well screen,followed by a 2 foot thick bentonite seal, and cement grout to grade. The wells will be secured with a locking cap under a stove pipe well box extending approximately 3 feet above the surrounding ground surface. 2.6 Well Development and Sampling Blaine Tech Services, Inc. (Blaine) of San Jose, California will develop the new groundwater monitoring well at least 72 hours after well construction. At least 48 hours after well development, Blaine will sample the groundwater monitoring well and submit the samples to CalScience Environmental Laboratories, Inc. (CalScience) in Garden Grove, California for chemical analyses. 2.7 Soil and Groundwater Chemical Analyses Selected soil and groundwater samples will be analyzed by CalScience for Total Petroleum Hydrocarbons as crude oil (TPHc) using EPA Method 8015M and benzene, toluene, ethyibenzene,and xylenes(BTEX) using EPA Method 8260B. Groundwater sample analysis for TPHc will be done with and without silica gel cleanup, 2.8 Survey A licensed surveyor will survey the boring and well locations (latitudes and longitudes) and the wellhead elevation relative to mean sea level per Geotracker requirements. 2.9 Report Preparation Following the receipt of analytical results from the laboratory, CRA will prepare a written report which will include field procedures, laboratory results, and boring logs. 060223(30) 4 CONESTOGA-ROVERS&ASSOCIATES