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2191 Navy Drive <br /> Page 2 <br /> Figure 6 Cross Section A-A' - TPU-g <br /> • Borehole P3 —soil sample at 15 feet bsg was positive for MTBE, ethyl tertiary- <br /> butyl ether (ETBE), and tertiary-butyl alcohol (TBA) instead of non-detect <br /> (ND) as indicated in the cross section. <br /> • MW-6—soil sample at 15 feet bsg was positive for TBA; and soil sample at 20 <br /> feet bsg was positive for TPH-diesel instead of TPH-gasoline at 1.2 milligrams <br /> per kilogram (mg/kg). <br /> • Borehole P9---soil sample at 15 feet bsg was also positive for ETBE. <br /> Section 5.0 Assessment of Hydrocarbon-impacted Soil and Groundwater <br /> The narrative states that the estimated distribution of dissolved TPH-gasoline <br /> concentrations is depicted in plan view in Figure 8. Figure 8 was inadvertently <br /> omitted from the submitted report. Please submit Figure 8. <br /> Appendix D Adsorbed Volume-Mass Calculations <br /> Please revise and resubmit the contaminant mass calculations to reflect the correct <br /> volume formulas. <br /> Quarterly Report— Third Quarter 2004 <br /> Please revise Table 2 to include analytical results for groundwater samples <br /> collected on February 6, 2004; and revise the analytical results for groundwater <br /> samples collected on July 16, 2004 to reflect that TPH-g was detected at 190 µg/L <br /> in MW-3; MTBE was detected at 33 µg/L by Method 8260 in MW-4; and the TBA <br /> results were less than 10 (<10) µg/L in MW-8 for sampling events 200312004. <br /> If you have any questions, please contact Vicki McCartney at (209)'468-3456. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> 4 <br /> Vicki McCartney, REHS 'Nuel C:.Henderson, Jr., RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> C.' William Little, AGE <br /> James L.L. Barton, CVRWQCB <br /> e <br />