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Delineation and Destruction Work Plan for Well B-1 QC samples. In part, laboratory QC samples consist of matrix spike/matrix spike duplicate samples. Laboratory QC samples are a subset of the field-investigation-derived sample. The laboratory QC requirements are included in the laboratory QA project plans, which are included in the water quality sampling and analysis plan for the site (Dudek&Associates 2004). 8.2 Data Management Steps will be taken in the field, office, and laboratory to ensure that data are transferred accurately from collection to analysis to reporting. Sample documentation, including labeling, chain-of- custody forms, and custody seals, will be completed to ensure that data are transferred accurately to the laboratory. Notes will be taken in the field to double-check chain-of-custody forms for accuracy. Laboratory reports will be checked for completeness. Final laboratory reports will be reviewed by the laboratory QA manager or laboratory project manager for errors before release. Data will be entered into the computer by hand, and the data entry will be checked by a second person.The data listed in the text,tables,and figures will be checked against the laboratory reports. Instrument Calibration Laboratory calibration activities are described in the laboratory QA project plans. Field calibration activities and results will be recorded on forms and included with field notes. 9 REPORTING Following completion of the delineation and destruction activities, as described in Chapter 2, Delineation of Impacts from Unauthorized Release, and Chapter 3, Well Destruction Activities, Dudek will prepare a delineation and destruction completion report. The report will include an evaluation of the groundwater and soil sampling results,discussion of the extent of impacts from the unauthorized release, a summary of the destruction activities, the County EHD-approved well destruction permits, and certification of proper well destruction by a state-licensed C-57 drilling contractor. 10 ADDITIONAL REGULATORY REQUIREMENTS This delineation and destruction work plan will be submitted to DTSC for approval. The approved delineation and destruction work plan will be provided to the County EHD prior to fieldwork to obtain a monitoring well destruction permit. Per the County Well Standards(2005),a County EHD inspector may be present during the well decommissioning field activities. 10886-7 DUDEK 12 January 2019