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Appendix H: Phase II Limited Subsurface Investigation <br /> AGE-NC Project No. 11-2006 <br /> Page 3 of 4 <br /> FINDINGS <br /> Leather scraps and cuttings, consistent with the site's past use as a tannery, were <br /> encountered in boring B5 between 7 feet and 8 feet bsg. Hydrocarbon odors were <br /> observed in soil samples collected from borings 131 and 132. Utilizing the OVM, organic <br /> vapors were detected in soil samples collected from borings 61, B2 and 136 at <br /> concentrations between 0.4 parts per million volume(ppm)and 7,110 ppm. Boring logs are <br /> included in this appendix. <br /> Nine of the thirty total soil samples collected from soil borings 61 through 66 were <br /> analyzed for the constituents listed above. Constituents of concern were not reported at <br /> or above laboratory detection limits in any of the soil samples analyzed. <br /> Grab ground water samples were collected from borings 131, 64 and 136 and analyzed for <br /> the constituents listed above. Gasoline (e.g., carbon range between C5 and C12), <br /> benzene, toluene, ethylbenzene, total xylenes and other VOCs were reported in the grab <br /> ground water sample collected from boring B1 (131-W); constituents of concern were not <br /> reported at or above laboratory detection limits in grab ground water samples collected <br /> from borings 134 and 66. Analytical results of grab ground water samples are summarized <br /> below: <br /> Sample ID Gasoline BTEX VOCs <br /> B1-W 3,400 Benzene: 4.0 Isopropylbenzne: 2.8 <br /> Toluene: 27 n-Propylbenzene: 11 <br /> Ethylbenzene: 28 1,3,5-trim ethylbenzene: 8.4 <br /> Total Xylenes: 100 1,2,4-Trimethylbenzene: 68 <br /> n-Butylbenzene: 2.2 <br /> B4-W ND ND ND <br /> B6-W No ND ND <br /> Notes: <br /> -All concentrations in micrograms per liter(pg/L) <br /> -BTEX:Benzene,toluene,ethylbenzene and total xylenes <br /> -ND:not detected at or above detection limits <br /> The laboratory report (Cal Tech Environmental Laboratories Lab Project. No. CT214- <br /> 1105085),quality assurance/quality control report,and chain-of-custody forms are included <br /> in this appendix. <br /> Advanced GeoEnvironmental,Inc. <br />