2023-10-03_REVISION - M1977344 (23)

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5-1 Section 5 Data Generation and Acquisition This section provides sampling and analytical methods, handling and custody, and associated QC. 5.1 Sampling Methods Proper sample collection procedures are essential so that representative and reliable data are collected. Samples will be collected in accordance with the SAP, this QAPP and SOPs. The QA/QC procedures will be fulfilled by adhering to the requirements detailed in this QAPP and the SOPs, and adherence will be demonstrated through appropriate documentation of sampling procedures within the field logbook and field sheets as described herein. Field audits by the QAO may also be part of QA/QC procedures. The following general procedures will be followed during sample collection: • Water quality samples will be collected into laboratory-supplied sampling containers. Refer to the SOPs for information regarding containers, preservatives, hold times, and temperature requirements for the various analytical methods. • Samples will be collected using the specified equipment and methods necessary to obtain a sample that is representative of the desired medium at the given sampling station. • Field QA samples, including equipment blanks, field blanks, duplicates and site-specific MS samples, will be collected for aqueous samples. • Samples will be handled carefully to minimize exposure to external influences such as wind, dust, or rain. • Sample bottles will be labeled with a minimum of date, time of collection, sample identification, preservative information, filtered or unfiltered, and the sampler’s initials. • Sampling date and time and the sampler’s initials will be added to the COC form immediately after sampling. • If problems occur during sampling, the QAO will be notified. The source of the problem will be identified, and the appropriate corrective action taken. These incidents will be documented in the monitoring reports, the project folder, and filed with the appropriate data package. If the problem compromises the quality of collected data, the data will be flagged within the database. 5.2 Sample Handling and Custody Once sample containers have been filled, they will be labeled, placed in re-sealable plastic bags, and stored in a cooler on ice to maintain a temperature below 6 degrees Celsius (°C) and above freezing (0°C). Identification information for each sample will be recorded on the appropriate field data sheet at the time of sample collection. COC forms are to be completed immediately after sample collection and before the samples are released to another individual or organization. The samples shall be transported or shipped to the analytical laboratory in insulated containers to arrive within the appropriate holding time and temperature for the specified analyses and will be accompanied by a COC form that identifies the sample bottles, date and time of sample collection,