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' Job No 4780201 • • 4 t 4.0 WELL INSTALLATION PROTOCOL ' 4.1 Well Drilling Protocol ' Monitoring Well Installation Permit No. 012320 was issued for the installation of well MW-1 by the SJCEHD on April 28, 1997 (see copy of ' permit in Appendix A). The well was drilled and installed by Spectrum Exploration, Inc. of Stockton, California (C-57 Lic. #512268) on August 1, ' 1997, using a mobile drill rig equipped with 8-inch diameter, hollow-stem ' augers. All augers, drill rods, subs, and collars were thoroughly steam-cleaned before drilling operations commenced. All equipment decontamination rinsate t was contained and stored on-site in labeled 55-gallon drums, approved for such use by the State of California Department of Transportation. ' In order to develop a profile of soil type and soil impact, soil samples were ' obtained during drilling operations at five-foot depth intervals beginning at a depth of 10 feet. Soil samples collected from the following intervals were ' retained for chemical analyses purposes: MW1-15', MW1-20', MW1-25', MW1-30', and MW1-40'. Soil samples were collected from the boring using a ' California modified, split-spoon sampler equipped with two-inch diameter brass sample tubes. Upon retrieval from the sampler, the ends of the sample tubes ' containing soil collected for laboratory analyses were covered with Teflon sheets, sealed with plastic caps, and stored on ice in a cooler. ' Soils encountered during drilling operations were logged continuously by examination of the soil cuttings and soil contained within the brass sampling ' tubes. This information is noted on the boring log presented as Figure 3. A discussion of soil types encountered is presented in Subsection 2.2 of this ' report. Groundwater was first encountered within Boring MW-1 at an approximate depth of 39 feet. There was a noticeable hydrocarbon odor in the ' soil encountered at all depths in Boring MW-1 . ' EzC, Inc. September 18, 1997