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01/22/1999 10:32 9167379298 LUSH CEOSCIENCES INC PACE 03 Site Investigation Work Plan January 22, 1999 1108 West.Tokay Street Lodi,California Soil Boring We believe the best means for quickly and inexpensively assessing soil contamination during the early phase of this work would involve the use of drive-point sampling techniques. This is a quick and cost-effective way of collecting undisturbed soil and groundwater samples as required. The other advantage of this is that there will be no drill cuttings left on site. The penetrations are made using a hydraulically driven or hammer-driven steel probe. Samples arse collected by withdrawing the probe and driving a 2-in outer diameter split-spoon sampler into undisturbed soil at the base of the boring. Samples are collected in 1.5-in diameter,clean brass sleeves mounted in the sampler. Soil samples will be eoilected at maximum 5-11 intervals and at lithologi.c contacts in the borings using a split-spoon sampler fitted with clean brass sleeves. Soil samples designated for possible laboratory analysis will be sealed, labeled, entered onto a chain of custody record,and placed in iced storage. A photoionizing organic vapor meter(OVM)will be used during sampling to detect potential hydrocarbon concentrations in the soil samples. Each penetration will be backfilled with a neat cement/bentonite powder grout. A groundwater sample will be collected from the boring by inserting a I-in diameter slotted temporary PVC casing into the boring approximately 3 to 5 fit below the groundwater surface. Groundwater is then purged from the casing using a bailer or surface pumps and a sample collected for analysis. Sample water will be collected in 40-m1 glass vials, 1-liter glass bottles,and 500-m1 plastic bottles for the required analyses. After exploration using the drive-point sampling techniques and evaluation of field and laboratory data, site data(boring logs,analytical reports)will be summarized and recommendations will be presented in a report. QUALIFICATIONS AND EXPERIENCE Lush Geosciences,Inc.and its Principal Geologist,Andrew Lush,has extensive experience across a wide range of projects. Relevant experience includes development of groundwater and vadose-zone monitoring programs and mitigation of subsurface contamination for a wide variety of contaminated sites including service stations,landfills,refineries,bulk fuel storage plants,agricultural sites,and industrial facilities;,groundwater sampling and sample analyses for Solid Waste Assessment Tests for landfills. Our personnel are very familiar with the geologic setting of the site through extensive work in the Sacramento and San Joaquin Valleys. $45-001 -2-