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Preliminary Investigation and Evaluation Report— California Cedar Products <br /> 5.2 TPH-d, BTEX and Fuel Oxygenates in Soil <br /> • Total Petroleum hydrocarbons as diesel TPH-d was detected in B1 at a <br /> maximum concentration of 6,900 mg/Kg at 13 feet bgs and at 18 feet bgs and <br /> decreased in concentration horizontally and vertically below 19 feet bgs, <br /> BTEX compounds were at low to non-detect levels Benzene was detected at <br /> 1 5 mg/Kg at 23 feet bgs in sample B3-3 Toluene was detected at 0 89 mg/Kg <br /> at 23 feet bgs in sample B2-3 Ethyl benzene ranged from 0 31 mg/Kg in sample <br /> B2-3 to 4 1 mg/Kg in sample 133-3 Total xylenes ranged from 0 02 mg/Kg in <br /> sample B2-3 to 2 3 mg/Kg in sample 133-3, <br /> Fuel oxygenates were not detected <br /> 5.3 Groundwater Sampling <br /> • TPH-d was detected in the groundwater sample collected from the hydropunch <br /> at B4 at a concentration of 2,600 ug/L, <br /> Benzene and toluene were at non-detectable levels, ethylbenzene was detected <br /> at 34 ug/L, and total xylenes were detected at 7 1 ug/L, <br /> oxygenates were detected in groundwater <br /> No fuel oxyg <br /> 5.4 Recommendations <br /> The following work is suggested to further characterize the horizontal extent of the <br /> diesel-range hydrocarbons identified by this investigation <br /> • Install five additional soil probes to terminate in the clay bed at 25 feet bgs (see <br /> Figure 6- Proposal Map), Analyze soil at 23 feet bgs to establish the Non- <br /> RAB Consulting <br /> 10 <br />