SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

PROJECT DESCRIP'T'ION,' DEC p 7 199Z SOIL RRYMIATION ; FORMER MAJOR MART GASOLINE STA`TION ENVIRONMENTAL 4F { �y PERMiTISERV1Cc"5 91 INTRODUCTION { Recent investigations of shallow soils onsite have shown thi t 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 fexcavation and investigation project is now planned to remove these;''kimpacted 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. PROJECT DESCRIPTION 'K I� 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 litte to ro gasoline residues are now present in the soil. If the soil is free of gasoline residuesit will be used for filling in r the excavation pit. If residues remain, the soil will be hauled offsite for treatment. P • After sampling, the stockpile will be temporarily relocated to the south edge of the ;. property to provide access to the existing pit by excavation equipment. 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 tolthe target depth will not affect any nearby buildings. 0� • During the excavation, air monitoring will be conducted to assure no significant emmissions of gasoline residues are released. U such em!h are identified, work will cease and the excavation will be covered. Appropriate measures will then be taken i . to control any emissions prior to continuing the excavation. • After the-completion of the excavation work, the tank pit will be filled with clean soil �I. (either from the existing stockpile or from an offsite source) and the area paved with asphalt. SCHEDULE S 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. Backfill of the excavation pit will require two days and grading of the area and paving will r quue 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 hours on weekdays. 3` :r i i