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Preliminary Investigation and Evaluation Report— California Cedar Products <br /> presented in Table 1 - Analytical Results 12 September 2002 The certified <br /> analytical results and chain-of-custody documentation are presented in Appendix B <br /> 3 2 1 Soil TPH-d <br /> TPH-d was detected in soil samples consisting of poorly graded sand from probe B1 <br /> at concentrations of 6,900 mg/Kg at 13 feet bgs, 6,900 mg/Kg at 18 feet bgs and <br /> 170 mg/Kg at 23 feet bgs The TPH-d concentrations decreased rapidly in clay to <br /> concentrations of 14 mg/Kg at 25 feet bgs and ND<1 0 mg/Kg at 30 feet bgs <br /> TPH-d was detected in the up-gradient probe B2 in poorly graded sand at <br /> concentrations of 9 3 mg/Kg at 18 feet bgs and 410 mg/Kg at 23 bgs <br /> TPH-d was detected in the cross-gradient probe B3 in poorly graded sand at <br /> concentrations of 450 mg/Kg at 18 feet bgs and 750 mg/Kg at 23 feet bgs, dust <br /> above the clay contact <br /> TPH-d was detected in the down-gradient robe B4 in poorly graded sand at <br /> g P P Y <br /> concentrations of ND<1 0 at 18 feet bgs and 220 mg/Kg at 23 feet bgs <br />' 3 2.2 Soil BTEX and Fuel Oxgenates <br /> The aromatic hydrocarbon benzene, toluene, ethylbenzene and total xylenes <br /> (BTEX) were detected at very low concentrations to non-detectable levels in the <br /> selected soil samples tested In sample 131-3 at 23 feet bgs, ethylbenzene was <br /> detected at 0 37 mg/Kg and xylenes were detected at 1 4 mg/Kg Fuel oxygenates <br /> were all at non-detectable levels Sample B1-3 collected at 25 feet bgs only <br /> contained total xylenes at 0 063 mg/Kg <br /> • <br /> RAB Consulting <br />