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(44 ug/kg). Laboratory analyses of soil samples for oth r constituents of concern included PCB's (below detection limits). Maximum metal concentrations in the soil were reported as follows: hexavalent chrome (below detection limit); cadmium (below detection limit); lead (14 mg/kg); nickel (6 mg/kg); zinc (170 mg/kg); and chrome III (10 mg/kg). i I PHSEHD has named Henry Hansen as a Responsible Party for the identified soil hydrocarbon contamination associated with the former underground storage tank at the subject property. PHSEHD has required Henry Hansen to conduct a limited followup sampling by a single soil boring site immediately under the former UST location to determine the vertical extent of hydrocarbon contamination. Current Soil Sampling Results I Exploratory soil boring HH-SB 1 was located immediately over the former waste oil UST location (Exhibit 3). This soil boring was advanced using a Mobile Drill B-53 drill rig with a continuous hollow stem flite auger. The drilling contractor was Earthtec Ltd, Roseville, California. HH-SB-1 was started, sampled, and compl ted on June 16, 2000. Drilling and soil sampling was conducted under the oversight of this off ce by a State of California Certified Engineering Geologist. The soil flite augers were steam cleaned prior to use in a hole. Soil samples were collected every five feet by a modified California split-spoon sampler using 2 '/z inch diameter brass sleeves. All sampling equipment was decontaminated by Alquinox prior to sampling. The first sample was collected at a depth of 6.0 to 6.5 feet belo ground surface. A total of eight soil samples were collected with total depth reached at 41.5 feet below ground surface. All cuttings were drummed in a 55 gallon DOT drum and left onsite. The lithologies penetrated were primarily brown to dark brown, medium to coarse grained sand, dry, and micaceous. No indication of proximity to thegroundwater table was found to be present. No odor or hydrocarbon staining was found tc be present in the cuttings. A total of eight soil samples were collected from the soil boring. The soil boring was backfilled with bentonite chips to within 10 feet of the surface an backfilled with native soil. All eight soil samples were submitted to KIFF Analytical, Davis, California under chain of custody documentation. Two soil samples, SB-1-11. -11.5, and SB-1 -16.0- 16.5 were analyzed by U.S. Environmental Protection Agency ( SEPA)Test Method 8260B and other scans. Specific scans requested by PHSEHD included TPH-g soline, BTEX, 7 oxygenates, and volatile halocarbons. All analytical results were reported below laboratory detection limits. In addition, PHSEHD requested a wet extraction test (WET) for led and a scan for Chrome III. Both lead 3