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h <br /> Mr. Harlin Knoll <br /> February 15, 2000 <br /> Page 4 of 4 <br /> excavation with clean imported and native fill. <br /> Since groundwater is anticipated in the excavation pit, ound Zero proposes to pump up to 40,000 <br /> gallons of groundwater from the excavation pit to de ter the excavation during digging and to <br /> remove a significant volume of contaminated groundwater. The groundwater will temporarily be :I <br /> stored on site in 21,000 gallon portable liquid storage tanks. Samples will be collected from the <br /> storage tanks to profile dissolved contaminants in the groundwater. Analytical results will be <br /> submitted to Sacramento County Regional Waste Water reatment Plant for acceptance of the water <br /> for disposal. Upon acceptance, the groundwater will be transported by tanker truck to the <br /> Sacramento County Regional Waste Water Treatment Plant, which is located approximately 20 <br /> miles north of the site in Elk Grove. <br /> Fieldwork will be conducted in accordance with the site-specific Health and Safety Plan and Quality <br /> Control/Quality Assurance Plan on file with PHS/EHD. <br /> Following the completion of all field work, a technical report will be submitted detailing the <br /> methodology and results of the remedial actions. <br /> 5.0 SCHEDULE <br /> It is anticipated that excavation and groundwater pumping can be completed within two weeks <br /> following approval of the Workplan. Soil profiling and spreading for aeration can be completed <br /> within two to three weeks after excavation and sampling has been completed. As time is of the <br /> essence, Mr. Manser would like to begin excavation activities as early as the week of February <br /> 22, 2000. Technical reporting should be completed by Aril 30, 2000. <br /> Please contact Ground Zero at your earliest convenience if you have any questions or comments <br /> regarding this report. <br /> Respectfully, .tER�D GF <br /> Ground Zero Analysis, Inc. ��� 0�� <br /> .10l1N P. <br /> LANE <br /> N No. 6795 Q <br /> John P. Lane OF <br /> CA Registered Geologist No. 6795 <br /> Attachments <br /> CC Mr. Mike Manser <br /> Ms. Marla Nahorn,Environmental Closures <br /> Mr. Mark List, RWQCB <br /> G:\Data\GROLFNDZE\MANSER\Manser 2linterimwp.doc <br />