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Table 4, continued Sample Date & Depth of TPH-D TPH-G B T E X TOG Sample (ft) (ppm) (ppm) (ppm) (ppm) ---------------------------------------------------------- BT Center/3 ' N.D. N . D. N.D. N.D. N.D. N. D N D. BT Center/8 ' N D. N . D. N.D. N. D. N.D. N .D. N.D BT South/8 ' N.D. N .D. N.D. N.D. N.D. N.D. 91 ---------------------------------------------------------- Method Detection 1 0 1 . 0 5 0 5 . 0 5 .0 5 .0 10 Limit ---------------------------------------------------------- Bldg Tr. . .Building Trench TPH-D. . . Total Petroleum Hydrocarbons as Diesel TPH-G. . .Total Petroleum Hydrocarbons as Gasoline BTEX. . .Benzene, toluene, ethylbenzene, total xylenes TOG. .Total Oil and Grease ppm. . Parts per million ppb. . Parts per billion (1 ppm = 1 ,000 ppb) SUMMARY OF OTHER ENVIRONMENTAL ACTIVITIES PERFORMED DURING THE PAST QUARTER The direction of groundwater flow and hydraulic gradient has been calculated for the February, 1994 sampling event . Groundwater continues to flow to the northeast . Infor- mation regarding the methodology used to determine the direction of flow and hydraulic gradient is presented in Appendix B. General housekeeping activities previously requested by Ms . Meays were performed during March and included the emptying and removal of drums containing well purge water , the introducted of the purge waterinto a storage tank for biological degradation, the emptying of drums containing drill cuttings onto the on-site soil storage pile, and the removal of general refuse dumped at the site by unknown parties ENVIRONMENTAL COMPLIANCE ACTIVITIES SCHEDULED FOR THE NEXT QUARTER EPM will complete the assessment tasks prescribed by PHS/EHD. The extraction and on-site groundwater treatment system will also be installed upon issuance of necessary permits . The next sampling of the on-site wells for Page 10