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C A M B R I A <br /> California landfill in accordance with Cambria's March 26, 1999 Over-excavation Work Plan <br /> Addendum <br /> ANALYTICAL RESULTS <br /> Tank excavation, dispenser island, and piping soil sample analytical results are summarized in <br /> Table 2 and presented on Plate 3 The certified analytical reports are presented in <br /> Appendix C A summary of these data is presented below <br /> UST Area. Initially, six samples were collected at depths of 10 5 to 14 0 fbg in the tank <br /> excavation Five of these samples (TS-1 through TS-6) contained detectable concentrations <br /> of TPPH, benzene, or MTBE These areas were over-excavated and resampled at depths of <br /> 13 0 to 15 0 fbg (TS-7 through TS-11) No TPPH or benzene was detected at these depths <br /> MTBE was only detected in sample TS-10 at a concentration of 0 395 ppm at a depth of <br /> 13 fbg <br /> Dispenser Areas Initially, four samples were collected at a depth of 2 0 fbg beneath the <br /> former dispensers Three of these samples (DS-1, DS-2, and DS-3) contained detectable <br /> concentrations of TPPH, benzene, or MTBE These areas were over-excavated and <br /> resampled at depths ranging from 5 5 to 12 5 fbg (DS-5 through DS-7) At these depths, <br /> TPPH concentrations ranged from ND to 9,950 ppm, benzene concentrations ranged from <br /> ND to 0 962 ppm, and MTBE concentrations ranged from 1 91 to 60 4 ppm <br /> Product Piping Initially, nine samples were collected at depths ranging from 1 5 to 3 0 fbg <br /> beneath the former product lines Five of these samples (PL-1, PL-3, PL-4, PL-8 and PL-9) <br /> contained detectable concentrations of TPPH, benzene, or MTBE These areas were over- <br /> excavated and resampled at depths ranging from 3 0 to 8 0 fbg (PL-10 through PL-14) <br /> TPPH was not detected at these depths Benzene was detected in sample PL-10 at a <br /> concentration of 0 0105 ppm at a depth of 3 5 fbg MTBE was detected in samples PL-l I <br /> and PL-10 at concentrations of 0 106 and 2 93 ppm, respectively <br /> Vapor Recovery Piping Initially, two samples were collected at a depth of 2 0 fbg beneath <br /> the former vapor recovery lines Both of these samples (VR-1 and VR-2) contained <br /> detectable concentrations of TPPH or MTBE Benzene was ND These areas were over- <br /> excavated and resampled at a depth of 4 5 fbg (VR-3 and VR-4) No TPPH, BTEX, or <br /> MTBE was detected at this depth <br /> • <br /> 241-1346 4 <br />