ARCHIVED REPORTS XR0003300 - Laserfiche WebLink

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4 • 3 The soils containing elevated levels of petroleum hydrocarbons from the east end of the former 26,000-gallon tank cavity will be removed using a backhoe or srnulat piece of equipment from atound the sand tower present at the eastern end of the excavation The sand tower will be supported or dismantled if the soil removal operation encroaches on the base of the tower Confirmation samples will be collected from the excavation following removal of the soils containing elevated levels of petroleum hydiocaiboins 4 The soils containing elevated levels of petioleirnn hydiacaibons fionn tine north wall of the totmet 10,000-gallon tank cavity may be removed using a backhoe of sinnrlar piece of equipment frons the surface following backfilling of the excavation if the soils ate of limited extent If found to extend too close to the rail lines to the north, further exploration using a (nand auger of drilling rig may be iecluned 22 BENEFICIAL REUSE: OF EXCAVATE=D SOILS 1 An estimated 1,100 cubic yaids of soil containing elevated levels of pets oleurn hydiocai bow, Ila,, Aeady been removed or will be removed as part of the tank removal ac.uvitits Tine primacy option foi dealing with the soil is beneficial reuse as base rnatenal toi tesurfacing a paiking lot on Santa Fe piopei ty The pai king lot will be resurfaced in the nett month o; two, and the soil would be blended to the gtavel base rock prior to application to tiie ground Road oil will then be spread over the surface to create an asphalt-like surface 2 To evaluate theotential hazardous nature of the soil, a composite sample of the soil will be P P P analyzed for ,ele(.ted paiametei5 indicated in "title 22, Article 11 of the California Code of Regulations Selected analysis will include volatile and semi-volatile organics, pestierdEs, petroleum hydiocai bons, metals, and an acute aquatic toxicity test The indicated tests iepiesent the range of compounds potentially present in the tanks 3 If the composite soil sample is not considered hazardous following completion of the above tests, use of the soil as base material foi the resurfacing of tile parking lot should be acceptable If the soil is found to exhibit hazardous chaiacteiistics, use of the soil as base material may still be allowable depending on the nature of the contannunant(s) and permitting i equii ernents 4 The secondary option for dealing with the soil is onsite biotreatment The soil would be . placed in lined piles where nutrients will be added to enhance biodegradation of the petioleurn hydrocarbons The tieatrnent time is dependant air a number of factors including types of ENVIRONMENTAL SOLUTIONS