FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

V Environmental Health Specialist from the LEA. All soil samples will be taken by a certified laboratory technician and tested for TPH Diesel (8015) and BTEX(8020) at a certified laboratory. The excavation will be left open until the soil test results are known. The tank removal/excavation area will be ramped on the north side for excavation equipment access, and the area will be encircled by a safety fence while the excavation remains open. Pending test results, no additional excavation will be required should results indicate a level of non-concern. If results indicate a level of non-concern, a certification of remediation and permission to backfill the tank removal/excavation area will be requested from the LEA by the Department of Public Works. Once approval to backfill the excavation area has been given, the excavation area will be filled with clean soil and properly compacted to eliminate settling. The surface will be graded to promote positive drainage from the area. Should test results indicate diesel contamination remains, plans for further remedial action will be determined based on sample results if deemed necessary by the LEA. Possible options might include further excavation, or a determination through computer modeling that the site does not pose a threat to the environment. All contaminated soil removed and stockpiled will be remediated onsite using aeration and/or bioremediation. All contaminated soil will be placed on an impervious plastic layer and turned biweekly at a minimum. Soil sampling will be performed as determined by the County project engineer. The soil will be deemed successfully remediated when soil test results indicate a level of non-concern. The Department of Public Works will then request that the LEA allow the remediated soil to be used as road subbase at the landfill site, and consider the underground storage tank facility remediation complete. R:\WES\CMCLOSE\TANKPROP.UST LA 21523