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Stantec
<br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2012 SITE STATUS,
<br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT
<br /> February 1, 2013
<br /> 2.0 Groundwater Monitoring and Sampling
<br /> 2.1 GROUNDWATER MONITORING AND SAMPLING PROCEDURES
<br /> Quarterly groundwater monitoring of 14 shallow wells (A-Zone) (MW-9, 2AMW-12, 2AMW-13,
<br /> MW-18 through MW-23, MW-25, MW-28, MW-31, MW-34, and MW-45), 21 B-Zone wells
<br /> (MW-16, MW-17, MW-24, MW-26, MW-27, MW-35, MW-42 through MW-44, MW-46 through
<br /> MW-52, and MW-56 through MW-60), eight C-Zone wells (MW-54, and MW-61 through
<br /> MW-67), and eight D-Zone wells (MW-55, and MW-68 through MW-74), were performed by
<br /> Stantec on October 15, 2012. Quarterly groundwater sampling of four shallow wells (MW-9,
<br /> 2AMW-12, MW-18, and MW-20), six B-Zone wells (MW-16, MW-42, MW-51, MW-57, MW-59,
<br /> and MW-60), seven C-Zone wells (MW-54, and MW-62 through MW-67), and eight D-Zone
<br /> wells (MW-55, and MW-68 through MW-74), were performed by Stantec between October 16
<br /> and 17, 2012. Groundwater monitoring and sampling activities were performed as required by
<br /> the MRP No. R5-2012-0805 (Appendix A), which was issued by the RWQCB on May 11, 2012.
<br /> MRP No. R5-2012-0805 is summarized in Table 1.
<br /> The City of Stockton is responsible for monitoring and sampling at the portion of the South
<br /> Shore Parcels identified as the MOU and the UOU. Five shallow wells, MW-3, MW-7,
<br /> 2AMW-15, MW-37, and MW-38 are located in the MOU and UOU and are gauged and sampled
<br /> by Wallace-Kuhl, on behalf of the City of Stockton. Stantec's groundwater monitoring and
<br /> sampling activities are conducted concurrently with Wallace-Kuhl; during 4Q12, Wallace-Kuhl
<br /> gauged wells for depth to water, but did not sample. Wells MW-36 and 3MW-1 R, which were
<br /> previously part of the MOU/UOU MRP, were destroyed by the City of Stockton on April 5, 2004
<br /> due to the development of the adjacent parcel. Well MW-6 was destroyed by the City of
<br /> Stockton on June 21, 2007 due to excavation and construction activities in the area; MW-06R
<br /> was reinstalled in close proximity in November 2008. Wells MW-4, MW-5, MW-8, MW-10,
<br /> MW-11, MW-40, MW-53, and MW-39 were abandoned by the City of Stockton during 4Q08.
<br /> Wells 2BMW-1 and MW-06R were abandoned by the City of Stockton during 2Q10 and 3Q10,
<br /> respectively, due to the construction of the DMV building.
<br /> Groundwater monitoring wells were sampled according to the requirements stated in MRP
<br /> No. R5-2012-0805.
<br /> 2.2 LABORATORY ANALYSIS
<br /> Groundwater monitoring of L&M OU wells during 4Q12 was performed by Stantec. Stantec's
<br /> standard procedures for groundwater monitoring and sampling are presented in Appendix C.
<br /> Collected groundwater samples were submitted under chain-of-custody (COC) documentation
<br /> to Kiff Analytical, a state certified laboratory located in Davis, California and were analyzed for
<br /> the following:
<br /> I:\Tidewater\TW Stockton(P2A)\QMRs\2012\4Q12-Ann ual\4Q12 and Annual QSSR QRSR QMR Stockton_FINAL.doc 2.1
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