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rw b° DI SCU551O`' OF LAWRATORY RESULTS Following are tables surrmarixing test results from both of the two groups run. The first series from Excavation f/ 1 , sampled 1/31 /1989, is given in Table A. The second group, from E%c3va- tion // 2, sampled 7/10/30, is given in Table B. TABLE A Sample N,o. BTEX (mg/kg,) TEPH (mg/kg) Tank 1 N N.D. .025 N.D. 10 Tank 1 S N.D. 025 N.D. 10 # 3 N.D. .025 37 TABLE B 8 N.D. .025 N.D. 10 E N.D. . 025 490 N Benzene .34 N.D. 10 5 N.D. .025 N.D. 10 W N.D. .025 N.D. i0 All samples from the first excavation showed no contamination a* detectable limits, except for Sample no. 3 in the 2 feet deep trench at the edge of the railroad track (Figs. 3 h 9 ) . No contamination was found in either test at the bottom of the tank excavation. This indicates that the tank had not leaked prior to removal . If the tank had leaked, it should have been revealed in the excavation bottom tests . Also, if product had leaked and penetrated to the water table, it would have been brought to the bottom of the excavation by the water +.vhich en- tered the excavation at night . The negative tests at tank bottom also show that all of the spill that occurred at tank removal was cleaned UP. Samples locations for the tests shown on Table B are shown on Figures 4 and 9 and in Appendix A-10. The four sidwalls of Excavation no. 2 were sampled about 5 or 6 feet from the surface. The slight benzine measurement of .84 mg/ kg at Sample N was taken very near Sample no. 3 from the first series of tests; that is, at the NE side of the railroad track. The bottom sample of this excavation also showed no contamin- ation (Sample C). A TEPH reading of 490 mg/kg was found at loca- tion E, also near the railroad tracks. Please note that the buildings and railroad tracks do not line up in either a north-south or east-west direction. 6