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Ground Zero Analysis, Inc. <br /> SITE SAFETY PLAN <br /> FACILITY BACKGROUND <br /> The subject site is an automobile wrecking yard bounded by East Miner Street to the north, <br /> Highway 99 to the east, Southern Pacific Railroad easement to the south, and a small business <br /> property to the west. A portion of the site, approximately 50 feet wide and 430 feet long, was <br /> acquired by the California Department of Transportation (CalTrans) for highway improvements. <br /> Prior to acquisition, Kaldveer Associates (Kaldveer) performed a soil quality investigation on <br /> that portion of the site for CalTrans. In <br /> In June 1991, Kaldveer drilled 33 exploratory soil borings in the acquisition area to depths of <br /> 10 feet below ground surface (bgs). Soil borings were located in a grid-like pattern, but some <br /> were moved to obvious locations of staining. Three near-surface soil samples collected by hand, <br /> and a total of 66 soil samples collected from the borings at depths of 1 and 4.5 feet bgs were <br /> submitted to a CalTrans-approved laboratory. Selected samples were analyzed for total <br /> recoverable petroleum hydrocarbons (TRPH), total petroleum hydrocarbons as gasoline and <br /> diesel (TPHg and TPHd, respectively), benzene, toluene, ethylbenzene, total xylenes (BTEX), <br /> halogenated volatile organic compounds (HVOCs), ethylene glycol, and CAM 17 metals. <br /> The results of the Kaldveer investigation indicated three areas of contamination. Area I, located <br /> in the vicinity of the work shop, had surficial (less than 4.5 feet) lead and TPHd contamination. <br /> Areas II, located south of the work shop, and III, made up of three individual locations near the <br /> southern portion of the acquisition area, had surficial TRPH contamination. In addition to those <br /> contaminants, trichlorofluoromethane and methylene chloride were detected. However, both of <br /> these analytes are commonly used in laboratories. Since the concentrations of <br /> trichlorofluoromethane and methylene chloride were quite low, it can be concluded that they <br /> were present because of laboratory contamination. In addition, the laboratory reports indicated <br /> that all samples that contained detectable TPHd were "atypical of diesel fuel." <br /> WORK PLAN <br /> Task One: <br /> Soil sampling will be focused on the area near the work shop with visible staining, the <br /> southeastern end of the property, the sump area in the main building, along the leach lines from <br /> the sump, and in the leach field. In addition, random sampling will be performed in the <br /> southwestern area of the property. There will be a total of 9 focused and 3 random sample <br /> locations at the site. Soil samples will be collected at depths of approximately 1 and 4.5 feet <br /> below ground surface (bgs) at each location. The 1-foot samples will be analyzed for TRPH, <br /> TPHg, BTEX, and total lead. If the 1-foot samples are nondetectable, the 4.5-feet samples will <br /> not be analyzed. If total lead is detected at significant concentrations, soluable threshold limit <br /> concentration (STLC) lead will be analyzed. <br /> PAGE 2 <br />