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Excavation Remediation Report Advanced Environmental Concepts,Inc. <br /> V <br /> excavated and stockpiled separately in order to allow access to the deeper contaminated soil horizon. <br /> (These volumes were excavated from two separate UST emplacements of the following approximate <br /> dimensions: Diesel Pit- 12 feet wide, 15 feet long, soil removed from average depth of 8 to 12 feet BGL; <br /> Gasoline Pit: 50 feet wide, 130 feet tong, soil removed from depths ranging from 4 to 16 feet BGL. The <br /> impacted soil was primarily located in the zone of the capillary fringe and excavation effectively served as <br /> ..source removal"to attenuate continued degradation of groundwater quality from gasoline. Sidewall and <br /> 1,.., floor samples were collected and analyzed in order to confirm the complete removal of contaminated soil. <br /> The October 1997 samples were analyzed by Associated Laboratories, a certified laboratory located in <br /> Orange. The July 1998 samples were analyzed by Baseline On-Site Analysis, a certified laboratory located <br /> in Huntington Beach. Analytical results of these confirmation samples are presented in Tables 5-7. <br /> Laboratory reports and Chain-of-Custody documentation are included in Appendix B. <br /> TABLE -5 <br /> Analytical Results -Confirmation Samples - Diesel Pit Area <br /> 10/06/97 <br /> (Ppm) <br /> V <br /> CONSTITUENT TPH-D MTBE BENZENE TOLUENE ETHYLBENZENE XYLENES <br /> SAMPLE I.D. .- w < <br /> DSL-12' ND ND ND ND ND ND <br /> 4.0 DSL-E-10' ND ND ND ND ND ND <br /> DSL-N-11' ND ND ND ND ND ND <br /> I.W DSL-S-11' ND ND ND ND ND ND <br /> DSL-W-11' ND ND ND ND ND ND <br /> �.. DETECTION 10 .005 .005 .005 .005 .015 <br /> LIMIT <br /> TABLE -6 <br /> `r Analytical Results -Confirmation Samples -Gasoline Pit <br /> 10-07-97 AND 10-08-97 <br /> (Ppm) <br /> CONSTITUENT TPH-G MTBE BENZENE TOLUENE ETHYLBENZENE XYLENES <br /> �.•, SAMPLE I.D. < <br /> :x. a:f'%•?•-.^.'tx,.::t<:.canv'.i..:..•keccu'.'}:•;} iS,•}$?a�.',F .Y22at'G <br /> WW-11ND ND ND ND ND ND <br /> NW-11' ND ND ND ND ND ND <br /> WW1@9' ND ND ND ND ND ND <br /> Gas-C-13' ND ND ND ND ND ND <br /> Project: AEC 96C-1707 7 <br /> V <br /> •ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND - <br /> 4400ASHE ROAD,#206 • BAKERSFIELD.CA 93313 8051831-1646 • FAX 8051831-1771 <br /> v <br />