ARCHIVED REPORTS_XR0005949 - Laserfiche WebLink

Home Browse Search

04 February 2000 AGE-NC.Project No. 98-0433 ' Page 2 of 5 samples were then collected from each well using a new disposable plastic bailer. Each water sample ' was transferred into three chilled 40-m1 volatile organic analysis (VOA) vials containing 0.5 ml hydrochloric acid(18%) as a sample preservative and one 1-liter amber bottle lacking preservative. After collection,the samples were labeled and placed in a chilled container for transportation under ' chain-of-custody to McCampbell Analytical Laboratories (MAI), a DHS-certified analytical laboratory. Each sample was analyzed for: • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in accordance with EPA Method 8015 Modified; ' Volatile aromatic hydrocarbons: benzene, toluene, ethyl benzene and total xylene (BTEX) in accordance with EPA Method 8020 and ' Oxygenated fuel additives: methyl butyl ether (MTBE), tertiary butyl alcohol (TBA), di- isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether (TAME) in accordance,with EPA Method 8260 Modified 2.3. DOMESTIC WELL SAMPLE COLLECTION A water sample was collected from the domestic drinking water well located on the Jimco site. The well pump was operated for one minute. A sample was collected from the dedicated sample tap on ' the well head; the sample was collected in three chilled 40-m1 VOA vials containing 0.5 ml hydrochloric acid(18%)as a sample preservative and a one 1-liter amber bottle lacking preservative. The labeled sample was stored in a chilled container and transported under chain-of-custody to MAI to be analyzed for constituents listed in Section 2.2. 3.0. FINDINGS Ground water elevations and flow direction were calculated from field data and observation and petroleum-hydrocarbon impact was quantified through laboratory analysis of ground water samples collected over the last quarter. 3.1. GROUND WATER GRADIENT AND FLOW DIRECTION Depth to ground water at the site ranged from 18.42 to 20.16 feet below well casing tops. The data indicates an average decrease of the ground water elevation at the site of 1.49 feet since the previous quarterly monitoring event. The ground water elevations at the site ranged from 38.63 feet to 38.75 Advanced GeoEnvironmcntal,Inc.