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Levine-Fricke-Recon <br /> CN NEEFS.NVDPO MOGiSTS A APPLIED SCIENTSTS <br /> Once the entire extraction and treatment system installation has been completed, LFR will require <br /> access to the two wells to test the in-well equipment, controls, and pumps. <br /> SOIL MANAGEMENT <br /> Based on our observations during the recent reconstruction, we are assuming that Chevron's <br /> contractor has replaced the upper two to three feet of soil with base rock. During excavation for <br /> trenching, the excavated material will be sorted to separate recently placed base rock from any <br /> remaining native soil. The base rock will be neatly stockpiled along the edge of trench in a low <br /> berm and covered with weighted plastic sheeting. Any excavated soil will be placed in a small bin <br /> to be located in the northeast corner of the Subject Property. Once all soil has been excavated, a <br /> representative composite sample will he collected from the bin and submitted to Sequoia <br /> Analytical Laboratory. Pursuant Mr. Hunter's request, the sample will be analyzed for total <br /> petroleum hydrocarbons as gasoline using EPA Method 8015; benzene, toluene, ethylbenzene, and <br /> total xylenes using EPA Method 8020; and methyl tertiary butyl ether using EPA Method 8260. A <br /> composite sample will be collected by combining four individual samples. If laboratory results <br /> indicate that no detectable concentrations of chemicals are present in the soil, LFR will arrange <br /> for disposal of the soil in a Class III landfill. If petroleum-based chemicals are detected, Chevron <br /> has indicated that it will arrange for disposal of such soil. <br /> FIELD PERSONNEL <br /> Mr- Donald T. Bradshaw, R.G., Site Project Manager, oversees all aspects of the construction at <br /> the Lincoln Center site and can be contacted at (510) 596-9559. Mr. Chris Alger, Senior <br /> Engineering Geologist, is responsible for supervising the field personnel conducting Phase I IRA <br /> tasks and can be contacted at (510) 596-9683. Representatives of Lincoln Properties, Ltd. may <br /> occasionally be in attendance to oversee field activities. <br /> SCHEDULE <br /> Our construction schedule will begin with the installation of the two extraction wells beginning the <br /> week of May 18, 1998. The extraction wells will likely be installed in two consecutive weeks. We <br /> will notify you by fax and telephone at least 48 hours before the start of this work. The active <br /> portion of the work will be conducted at night to minimize impact to the station operations <br /> between the hours of 8:00 p.m. and 7:00 a.m. The drilling rig will not be left on site over the <br /> weekend, however, as described above, the drilling rig will need to remain in place during the <br /> daytime hours during the week. We will provide a security guard to patrol the area and keep <br /> unauthorized persons from entering the exclusion zone left around the drill rig during off-shift <br /> hours. <br /> Trenching and installation of well vaults, conveyance piping, electrical service conduits, and <br /> backfilling and paving will be conducted approximately one month after installation of the <br /> extraction wells. This work is tentatively scheduled for June 1998, and will also be conducted <br /> LIhACasSCbevmn-rcv�md-0ai 1 I'SRL 4 <br /> STO:S00 'H'5'.1 \OHA3HJ OLC9 Zt8 OTS$ St:9u HILZ/SO <br />