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Appendix H: Phase II Limited Subsurface Investigation <br /> AGE-NC Project No. 11-2006 <br /> Page 2 of 4 <br /> transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a <br /> California Department of Public Health-Certified laboratory and analyzed for the following <br /> chemical constituents: <br /> • Total petroleum hydrocarbons (TPH-all) in accordance with EPA-method 8015- <br /> modified; and <br /> • Volatile organic compounds (VOCs) in accordance with EPA Method 82608. <br /> Soil sample duplicates were extruded into plastic bags and field-screened for the presence <br /> of organic vapors using an organic vapor meter (OVM), equipped with a photo-ionization <br /> detector (PID). Additionally, the soil was visually classified in accordance with the Unified <br /> Soil Classification System (USCS). PID readings and soil classifications were recorded on <br /> boring logs, provided in this appendix. <br /> GRAB GROUND WATER SAMPLE COLLECTION <br /> A grab ground water sample was collected from borings B1, 134 and B6 at a depth of <br /> approximately 30 feet bsg, utilizing a Geoprobe Screen Point 15 Ground Water Sampler TM <br /> (GWS). Each ground water sample was extracted using inertial action by lowering Teflon <br /> tubing through the hollow center of the push rods into the GWS. Sufficient sample was <br /> collected to fill three 40-ml EPA-approved volatile organic analysis (VOA) vials and one <br /> 1-liter amber bottle, each without preservative. The ground water sample containers were <br /> labeled with soil boring designation, date, time, and samplers initials and then placed in a <br /> chilled container. Grab ground water samples were transported under chain-of-custody to <br /> CTEL and analyzed for the chemical constituents listed above. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to sample collection, soil sampling equipment was thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. Probing rods and drilling equipment were <br /> thoroughly cleaned prior to soil probe boring advancement. <br /> BORING ABANDONMENT <br /> Soil borings were abandoned by backfilling with portland cement from the total depth to <br /> surface grade. <br /> ,Advanced GeoEnvironmcntal„Inc. <br />