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r' + <br /> •CAMBRIA <br /> During the October 2001 sampling event,no total petroleum hydrocarbons as gasoline (TPHg) or <br /> benzene, toluene, ethylbenzene, or xylenes (BTEX) were detected in any of the site wells <br /> Methyl tertiary butyl ether (MTBE) was detected in well MW-8 at a concentration of 0 54 parts <br /> per billion (ppb) It was not detected in the other wells Benzene and MTBE data from this <br /> sampling event are presented on Figure 3 <br /> During the November 2001 sampling event, TPHg was detected in groundwater samples from <br /> MW-5 and MW-6 at concentrations of 82 and 120 ppb, respectively Benzene and MTBE were <br /> detected in all three wells at concentrations ranging from 4 2 to 5 5 ppb and 1 1 to 5 5 ppb, <br /> respectively These results are not consistent with historical results nor the December 2001 <br /> results, which are discussed below Additionally, because most of the constituents were detected <br /> in all of the wells at similar concentrations, these results are highly suspect Benzene and MTBE <br /> data from this sampling event are presented on Figure 4 <br /> During the December 2001 sampling event, TPHg and benzene were detected in well MW-6 at <br /> concentrations of 110 and 4 5 ppb, respectively MTBE was also detected in well MW-6 at <br /> 99 ppb TPHg, BTEX, and MTBE were not detected in wells MW-5 or MW-8 Benzene and <br /> MTBE data from this sampling event are presented on Figure 5 <br /> Cambria installed two soil vapor extraction (SVE) wells on November 16, 2001 and conducted a <br /> five-day SVE pilot test November 26 through 30, 2001 Cambria installed an additional SVE <br /> well on December 19, 2001 <br /> ANTICIPATED FIRST QUARTER 2002 ACTIVITIES <br /> Blaine will continue to sample the site on a monthly basis and coordinate the quarterly sampling <br /> event with the former Chevron station located at 301 West Kettleman Lane according to the <br /> existing sampling schedule They will gauge and sample all site wells and tabulate the data <br /> Cambria will prepare one groundwater monitoring report per quarter according to the existing <br /> reporting schedule <br /> Cambria will submit a report summarizing the SVE well installations and SVE test results under <br /> separate cover No additional SVE tests are currently scheduled <br /> • <br /> 1346 2 <br />