SITE INFORMATION AND CORRESPONDENCE

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PROJECT DFSCRIP'IZON: DEC 0 ?' 1992 IATION SOIL REyIED FORMER N OR (MART GASOLINE STATION ENVIRONMENTAL HEALTH PERMITISERVIC-3 1 'I I t MODUCTION Recent investiations of shallow soils onsite have shown that gasoline components currently remain only in a corner of the bottom of the tank excavation pit and perhaps in a portion of the soil stored on the east part of the property which came from the:';original tank removal. An excavation and investigation project is now planned to remove,}these impacted soils and complete the portion of the project focused on the shallow soils by filling the excavation to the surface. Future work, if any, will involve below grade drilling which will not materially impact the surface of the site. if PROJECT DESCRIPTION The excavation and site restoration will be completed as follows: e • The existing soil stockpile will be sampled further to determine if gasoline components remain in the soil. Limited prior work indicates lithe to no gasoline residues are now present in the soil. If the soil is free of gasoline residues,1,1 it will be used for filling in the excavation pit. If residues remain, the soil will tie hauled offsite for treatment. • the stockpile will be temporarily located to the south edge of the After sampling, kp Po Y property to provide access to the existing pit by excavation equipment. !E • The excavation will be deepened to a maximum of 40 feet below grade (if necessary) to remove soils having gasoline residues. The soil removed will be classified by a mobile laboratory onsite and hauled away to an appropriate disposal site. A review of soil stability has been completed to assure excavation to'the target depth will not affect any nearby buildings. During the excavation, air monitoring will be c�ondu ivied to assure no significant ` emmissions of gasoline residues are released. If such em�missions are identified, work will cease and the excavation will be covered. Appropriate measures will then be taken to control any emissions prior to continuing the excavation. 'I Aber the-completion of the excavation work, the tajnk pi will be filled with clean soil (either from the existing stockpile or from an offsite soyrce) and the area paved with asphalt. lip ;1 SCFIEDULE F Preparations for the excavation work is expected to take two days and the actual excavation one day. Soil removal is expected to require a maximum of two days. 11 Backfill of the excavation pit will require two days and grading of the area and paving will require two days. As some coordination time is expected, the entire project should require a total of twelve working days with intensive work occupying only three to four days. All work will be conducted during daylight .tours on weekdays.