COMPLIANCE INFO_1986-2000 - Laserfiche WebLink

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0 The soil samples were collected using the excavator. Immediately upon removal of each • tank, an excavator bucket of native soil from each sample location was taken. After filling the excavator bucket from the desired location in the bottom of each excavation, approximately 6 inches of soil were rapidly scraped away from the surface of the soil using • a hand trowel: The soil samples were collected in 6 -inch long brass tubes which were driven into the soil. The samplers were sufficiently driven into the soil so as to allow no headspace in the brass tubes. Following retrieval, both ends of the brass tubes were • covered with Teflon, securely capped with polyethylene end caps, labeled, and placed in an C ice chest containing Blue Ice and kept at 4°C for transport to the analytical laboratory for chemical analyses. The samples collected were labeled with the sample identifier, location, sampler's name, and time and date of sample collection, using a black indelible marking pen. The samples • collected were recorded on a Sample Management/Chain-of-Custody form which tracks the samples from time of collection to delivery at the analytical laboratory. All information recorded on the Sample Management/Chain-of-Custody form was entered in ink. • BACKFILL AND COMPACT THE EXCAVATION The excavation was backfilled and compacted by AEMC on 25 and 26 April 1991, and on • 2 May 1991. Compaction testing was conducted by Kleinfelder, Inc., and an average density of greater than 90% of the maximum dry density was achieved. Copies of compaction density test results are presented in Appendix C. LABORATORY The soil samples were analyzed for the following parameters: • Total Petroleum Hydrocarbons—Diesel (TPH-D) (EPA Method 8015 Modified); and Benzene, Toluene, Xylene, and Ethylbenzene (BTXE) (EPA Method 8020). ® r,pbe.Wa"> Page 8 AMERICAN