ARCHIVED REPORTS_XR0009848 - Laserfiche WebLink

Home Browse Search

excavator moved to the south end of the excavation, and soil removal continued. The clean fill was stored in a separate pile than the underlying spoil, which was placed in the empty truck, (which had returned from Forward. ) At this time, the size of the excavation was approximately 12' wide and 30 ' long, grading from 12' deep at the north end to about 9--10 ' at the south While removing spoil from a depth of 10-12' , about 20 feet from the north end, a very strong petroleum odor was noted, and the removed spoil revealed obvious staining and discoloration. As digging progressed, the contamination appeared to be strongest on the east and south wall, and the bottom. The west wall did not show any apparent contamination. The contaminated soil consisted of very clayey sand & sandy clay, with lenses of very hard, dense clay, (hardpan. ) This spoil was not placed in the truck, but was stored on site pending further profiling The remaining clean spoil was placed in the truck, and was trans- ported to Forward under prior agreement. A total of 2 loads, (36 cubic yards, ) wa delivered to the disposal facility: copies of the receipts for the spoil are attached asPPP$NDIX F-, Excavation continued to a depth of about 20-21 ' , the limit of the equipment being used. Contamination was still present on the south and east walls, but work was discontinued due to space limitations. The dimensions of the excavation at this time were approximately 32' long, and 12 to 15' wide, refer to PLATES VI & VI for details. Five (5) soil samples were taken from the sides of the excavation as directed by the RG and Michael Collins of the County EBD using the excavator bucket. It was not possible to obtain a soil sample from the bottom at the south end due to depth of the hole A 2" X 6" brass tube was driven into the spoil collected in the bucket by the geologist, briefly described, promptly sealed with teflon tape and plastic end caps , and then sealed with duct tape The metal tubes were then labeled and placed on ice pending transport to a State Certified laboratory for analysis The locations and identifying number of each soil sample is shown on P4ATE: _vz _&_VZI . Two (2) composite samples were taken from the spoil pile for characterization purposes_ They were sealed, labeled and stored with the other soil samples The excavation was left open pending the results of the laboratory analysis It was barricaded off with sawhorses and metal drums and marked with Yellow plastic tape. Samples were transported under chain of custody to FGL Environmental for analysis iLaboratory results of the above work revealed that a minor amount 5