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L & M OPERABLE UNIT-THIRD QUARTER 2013 SITE STATUS, REMEDIAL SUMMARY,
<br /> AND GROUNDWATER MONITORING REPORT
<br /> Groundwater Monitoring and Sampling
<br /> November 1, 2013
<br /> Number
<br /> Wells With
<br /> Wells With Wells of Wells With
<br /> Number Number Stable or Non-
<br /> Constituent Zone Increased Concentrations Stable or Non-
<br /> of Wells of Wells Detectable
<br /> Concentration Decreased Detectable
<br /> Concentrations
<br /> Concentrations
<br /> MW-16, MW-51,
<br /> B 0(i) MW-42, MW-59 2(l) 4(4)
<br /> MW-57, MW-60
<br /> MW-62, MW-63,
<br /> C 0(2) MW-54, MW-64 2(0) MW-65, MW-66, 5(5)
<br /> MTBE MW-67
<br /> MW-68, MW-69,
<br /> MW-70, MW-71,
<br /> D 0(i) MW-55 1 (0) 7(7)
<br /> MW-72, MW-73,
<br /> MW-74
<br /> MW-16 MW-42,
<br /> B 0(0) 0(0) MW-51, MW-57, 6(6)
<br /> MW-59, MW-60
<br /> MW-62, MW-63,
<br /> TBA C MW-54-- 1 (0) MW-64 1 (0) MW-65, MW-66, 5(6)
<br /> MW-67
<br /> MW-68, MW-69,
<br /> D 0(0) MW-55, MW-71 2(l) MW-70, MW-72, 6(7)
<br /> MW-73, MW-74
<br /> Notes:
<br /> B-Zone wells MW-24, MW-26, MW-27, MW-35, MW-44, MW-56,and MW-58 were not sampled during 2Q13 per MRP No.R5-2012-0805.
<br /> C-Zone well MW-61 was not sampled during 2Q13 per MRP No. R5-2012-0805.
<br /> • In general, reported TPHg, TPHd, TPHo, benzene, MTBE, and TBA concentrations in
<br /> samples collected from the deep zone wells were within historical ranges during 3Q13
<br /> (Figure 11 through Figure 16 for B-Zone, Figure 18 through Figure 23 for C-Zone, and
<br /> Figure 25 through Figure 30 for D-Zone). Concentrations during 3Q13 remained
<br /> relatively stable or were reported as non-detect.
<br /> • Dissolved phase TPHg, TPHo, and benzene, in B-Zone wells were generally delineated
<br /> to the north, west, and south. Dissolved TPHd was delineated except to the north and
<br /> east. Dissolved MTBE was delineated except to the southwest and east. Site wells
<br /> located to the east (UOU and MOU wells) are not currently sampled by Stantec, and
<br /> therefore, data is not available to contour. TBA was reported as non-detect above the
<br /> laboratory reporting limit during 3Q13.
<br /> • Dissolved phase TPHg, MTBE, and TBA concentrations in
<br /> C-Zone wells were generally delineated except to the east, during 3Q13. Dissolved
<br /> 5ta ntec 2.16
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