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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 /> 2.0 Groundwater Monitoring and Sampling
<br /> 2.1 GROUNDWATER MONITORING AND SAMPLING PROCEDURES
<br /> Quarterly groundwater monitoring of 15 shallow wells (A-Zone) (MW-9, 2AMW-12, 2AMW-13,
<br /> 2AMW-14, MW-18 through MW-23, MW-25, MW-28, MW-31, MW-34, and MW-45), 21 B-Zone
<br /> wells (MW-16, MW-17, MW-24, MW-26, MW-27, MW-35, MW-42 through MW-44, MW-46
<br /> through 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 April 15, 2013. Quarterly groundwater sampling of seven shallow wells (MW-9,
<br /> 2AMW-12, MW-18, MW-20, MW-21, MW-22, and MW-31), eight B-Zone wells (MW-16, MW-42,
<br /> MW-51, 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 between July 15 and 18, 2013. Groundwater monitoring and sampling activities were
<br /> performed as required by monitoring and reporting program (MRP) No. R5-2012-0805
<br /> (Appendix A, 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 by
<br /> Wallace-Kuhl, on behalf of the City of Stockton, and under a separate MRP. These wells have
<br /> not been sampled April 21, 2008. Stantec's groundwater monitoring and sampling activities are
<br /> to be concurrently coordinated with Wallace-Kuhl.
<br /> 2.2 LABORATORY ANALYSIS
<br /> Stantec's standard operating procedures for groundwater monitoring and sampling are included
<br /> as Appendix C. Collected groundwater samples were submitted under chain-of-custody (COC)
<br /> documentation to Kiff Analytical, a state certified laboratory located in Davis, California and were
<br /> analyzed for the following:
<br /> • TPHd and TPHo by Environmental Protection Agency (EPA) Method 8015M
<br /> • TPHg; benzene, toluene, ethylbenzene, and total xylenes (collectively BTEX); and fuel
<br /> oxygenates (MTBE and TBA) by EPA Method 8260B
<br /> • Dissolved arsenic by EPA 6000/7000 Series (Third Quarter, select wells only)
<br /> Monitoring well construction details are included on Table 2. Groundwater elevation and
<br /> analytical data are presented in Table 3 and Table 4. Historical analytical data is included as
<br /> Appendix D. Certified laboratory analytical reports, Stantec Lab Validation forms, COC
<br /> documentation, and monitoring and sampling field data sheets are included as Appendix E.
<br /> 5ta ntec 2.1
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