SITE INFORMATION AND CORRESPONDENCE

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PROJECT DESCRIPTION DEC 0 7 1992 SOIL REM IDIATION FORMER MAJOR MART GASOLINE STATION E1VVIRONMENTA>r HEA13-H PERMITlsE7VIC-3 3� INTRODUCTION _ � M Recent investigations of shallow soils onsite have shown thati 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. i6 I� i PROJECT DESCRIPTION � The excavation and site restoration will be completed as follows: • The existing soil stockpile will be sampled further to determine if gasoline components remain in the soil. Limited prior work indicates little to no gasoline residues are now present in the soil. If the soil.is free of gasoline residues p it will be used for filling in the excavation pit. If residues remain, the soil will be hauled offsite for treatment. • After sampling, the stockpile will be temporarily r�elocated to the south edge of the '4 property to provide access to the existing pit by excavation equipment. I j The excavation will be deepened to a maximum of 40 feat 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 conducted to assure no significant emmissions of gasoline residues are released. If such em;nussions 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. • After the-completion of the excavation work, the tL pith will be filled with clean soil either from the existing stockpile or from an offsite source) and the area paved with { kP asphalt. SII SCHEDULE 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. 'fBackfill 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. Allwork'will be conducted during daylight hours on weekdays. -