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r Results of CPT Investigation and Work flan Cleanup and Abatement Order No 5-00-707 EAI Project No 1232 2.4 RESULTS OF CPT INVESTIGATION On November 13, 2000, three 150-foot deep CPT soundings (CPT-1 through CPT-3) were advanced around the RIW (see Figure 2) The CPTs were advanced, in accordance with ASTM ' standards (D3441), by Gregg In Situ, Inc (Gregg) under the supervision of EAI staff (Brent Mecham) and RWQCB staff(Marty Hartzell) The following parameters were recorded by the cones at 5-centimeter depth intervals for each of the three soundings, tip resistance, sleeve ' friction, and dynamic pore pressure Appendix A contains a copy of the Gregg report documenting the results obtained from the CPT soundings The information obtained from the CPTs advanced on November 13, 2000 were reviewed in the field by Brent Mecham of EAI and Marty Hartzell of the RWQCB, and based on this review, it was determined that discrete soil and ground water samples would be collected and ' tested from three new CPT borings (the new CPT borings to be drilled within 5-feet of the original CPT soundings), at the following depth intervals Soil Samples Ground Water Samples CPT ID No (feet below ground surface) (feet below ground surface) CPT-1 59 - 60 61 - 64 81 — 82 84- 88 101 — 102 CPT-2 57 - 58 60 - 63 74 - 75 76 - 79 107 — 108 89- 92 CPT-3 58 — 59 60- 63 ' 86 - 87 88 - 92 99 — 100 1 101 - 104 124 - 125 1 125 — 128 1 The only evidence of any contamination on November 13, 2000, was a slight odor in soil at sounding location CPT-3 between depths of approximately 90 and 100 feet below ground surface (bgs) 1 Between November 14 and 15, 2000, three new CPT borings, also labeled CPT-1, CPT-2 and CPT-3, were advance within 5-feet of the CPT soundings advanced on November 13, 2000, for the purpose of collecting discrete soil and ground water samples for analytical testing at the depths listed above Boring CPT-1 terminated at 102 feet bgs, CPT-2 at 108 feet bgs, and CPT- 3 at 125 feet bgs Appendix B contains boring logs for these three CPT borings 2.1 Analytical Results The soil and ground water samples were tested for total petroleum hydrocarbons as gasoline (TPH-G) by modified EPA Method 8015, and volatile organic compounds (VOCs) including, MTBE TBA, DIPS, ETBE, TAME, EDB, ethanol and methanol, by EPA Method 8260B . Appendix C contains the chain of custody record forms and laboratory reports r BS 1232P WELLS-WP -3- ENVIRONMENTAL AUDIT, INC.&