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1 09 March 1:999 <br /> . AGE-NC Project No. 98-0432 <br /> Page 4of7 t <br /> a depth of 30 feet bsg in soil boring B3. <br /> The soil borings were advanced at the site using a Geoprobe 5400 probing unit equipped with 1.25- <br /> inch diameter probe rods with a 2.15-inch diameter soil sampling assembly, or, in-portions of soil <br /> boring B3, using a Geoprobe macro soil sampling assembly and a 4400t Teflon sleeve. After <br /> collection, the ends of a 6-inch portion of the soil-filled sleeve were covered with Teflon sheets, <br /> ' capped and sealed with tape. <br /> All probing rods, sampling tools and sample liners used for sample collection were thoroughly rinsed <br /> ' with clean water after washing with'a.solution of Alconox prior to each sampling run. After <br /> collection,the ends of the second leading brass sleeve were covered with aluminum sheets, capped <br /> and sealed with tape. The sleeves were labeled and placed in a chilled container. <br /> Following collection of soil samples from borings B 1 and Bb, a water sampling assembly equipped <br /> with a slotted PVC screen was placed into the borings and a grab water sample was then collected <br /> from both borings. A suction was placed on an amber liter bottle through a Teflon tubing section into <br /> the well screen. A sample was then drawn to the surface:Each grab water sample was transferred <br /> ' into 40-m1 EPA-approved VOA vials containing 0.5 ml 18% hydrochloric acid as a, sample <br /> preservative and into 1-liter amber containers. Grab ground water and selected soil samples were <br /> transported under chain-of-custody, to Precision Envirotech (PET) ,in Stockton, a California <br /> ' Department of Health Services (DHS)-certified analytical laboratory. <br /> ' 3.2. LOGGING <br /> Soil was extruded from a the soil sleeve and screened'forthe presence of organic vaporusing an <br /> organic vapor meter(OVM) equipped with a photo-ionization�detector(PID: Thermo Environmental <br /> 580A, 10.0 eV,calibrated to isobutylene),and the readings were recorded on the boring log.The soil <br /> was then visually described in accordance with the Unified Soil Classification System(see Appendix <br /> B)• <br /> ' 3.3. LABORATORY ANALYSES OF SOIL SAMPLES <br /> Selected soil samples were analyzed for total petroleum hydrocarbons quantified-as diesel(TPH-d) <br /> in accordance with EPA Methods 8015 Modified. Other soil samples from borings were also <br /> analyzed for volatile aromatic hydrocarbons (benzene, toluene, eihylbenzene and total xylenes; <br /> ' BTEX)and Oxygenated compounds(di-isopropyl ether.[DIPE], ethyl tertiary-butyl ether [ETBE], <br /> methyl tertiary-butyl ether[MTBE],tertiary-amyl methyl ether[TAME] and tertiary-butanol'[TBA]) <br /> in accordance with EPA Method 8260-Modified. <br /> Advanced GeoEnvironmental,Inc.' <br />