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Site Characterization - Second Event Page 9 <br /> Former Karlson Trucking Facility <br /> Project No. 191.2 <br /> April 27, 2000 <br /> A clean dedicated stainless steel bailer was used to collect each sample. <br /> Bailer cleanliness was verified by collecting a bailer blank (pouring distilled <br /> water through the bailer and collecting it in a VOA vial) prior to collecting <br /> the analytical sample. Disposable gloves were worn by the sampling <br /> technician while collecting all samples. The gloves were changed between <br /> the collection of each sample to reduce the potential for cross-contamination. <br /> Water samples were transferred from the bailer into unpreserved 1 liter <br /> amber glass containers (and) 40 ml VOA vials preserved with hydrochloric <br /> acid. Extreme care was exercised during the collection of each sample to <br /> prevent agitation of the water contained in the bailer and during transfer. <br /> All samples were checked for head space bubbles, labeled, inserted into foam <br /> holders and placed in an ice chest cooled to 4°C for transport to the <br /> laboratory. <br /> A chain of custody document, listing all samples collected and their intended <br /> analyses, accompanied the samples from field to the laboratory, thereby <br /> providing a means to track their movement and insure their integrity. <br /> Samples were shipped to Sherwood Labs (DHS# 1400), of Hilmar, California, <br /> for analysis. <br /> Each sample was analyzed as follows using the following EPA methods: <br /> a 3510/8015m - Total Extractable Petroleum Hydrocarbons (TEPH). <br /> In addition, one sample from MW-4 was also analyzed for Polynuclear <br /> Aromatic Hydrocarbons (PAH/PNA) by EPA method 8270. <br /> The detection limits for the above analyses are listed on the attached data <br /> tables. <br /> 2.2.4 Groundwater Field & Analytical Data <br /> Geo-Probe <br /> Detectable dielectric oil range petroleum hydrocarbons were present in <br /> groundwater samples from SB-8 and SB-9 (0.654 and 0.193 mg/l, dielectric oil <br /> range petroleum hydrocarbons, respectively). In addition, groundwater <br /> samples collected from various levels in SB-10 contained detectable levels of <br /> diesel range petroleum hydrocarbons, specifically: <br /> a 133 mg/1 at 14 feet below grade, <br /> a 2.820 mg/1 at 19 feet below grade, <br /> 2937 Veneman Avenue, Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293 <br /> Modesto, Ca 95356 Fax: (209)569-0295 <br />