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L & M OPERABLE UNIT-THIRD QUARTER 2014 SITE STATUS, REMEDIAL SUMMARY,
<br /> AND GROUNDWATER MONITORING REPORT
<br /> Groundwater Monitoring and Sampling
<br /> October 31, 2014
<br /> Number
<br /> Wells With Stable
<br /> Wells With Wells of Wells With
<br /> Number Number 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-42,
<br /> B --- 0 (i) MW-59 1 (1) MW-51,MW-57, 5 (4)
<br /> MW-60
<br /> MW-54,MW-62,
<br /> MTBE C MW-63 1 (2) MW-64 1 (0) MW-65,MW-66, 5 (5)
<br /> MW-67
<br /> MW-55,MW-68,
<br /> MW-69,MW-70,
<br /> D --- 0(i) --- 0 (0) MW-71,MW-72, 8 (7)
<br /> MW-73,MW-74
<br /> MW-16,MW-51.
<br /> B --- 0 (0) MW-42 1 (1) MW-57,MW-59, 5 (5)
<br /> MW-60
<br /> MW-62,MW-63,
<br /> TBA C MW-54,MW-64 2 (l) --- 0 (i) MW-65,MW-66, 5 (5)
<br /> MW-67
<br /> MW-68,MW-69,
<br /> D MW-70 1 (2) MW-55 1 (1) MW-71,MW-72, 6 (5)
<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 3Q14 per MRP No. R5-2012-
<br /> 0805. B-Zone wells MW-17,MW-43,MW-46,and MW-52 were not sampled or gauged during 3Q14 due to sheen/SPH and MW-47
<br /> through MW-50 were not sampled due to skimmer in the well.
<br /> • In general, reported TPHg, TPHd, TPHo, benzene, MTBE, and TBA concentrations
<br /> in samples collected from the deep zone wells were within historical ranges
<br /> during 3Q14 (Figure 11 through Figure 16 for B-Zone, Figure 18 through Figure 23
<br /> for C-Zone, and Figure 25 through Figure 30 for D-Zone). Concentrations during
<br /> 3Q 14 remained relatively stable or were reported as non-detect.
<br /> • Dissolved phase benzene, MTBE, and TBA in A-Zone wells were generally
<br /> delineated to the north, west, and south. Dissolved phase TPHg and TPHo was
<br /> delineated except to the north. Dissolved TPHd was not delineated. Wells
<br /> located to the east (UOU and MOU wells) were not sampled, and therefore,
<br /> data is not available to contour.
<br /> 5ta ntec 2.18
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