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Ground Water Sampling <br /> SW-846,or other standard methods,the analytical procedure and method detection <br /> • limits to be used should be documented in the format of a Standard Operating <br /> Procedure (SOP) <br /> 2. For analysis by non-SW-846 methods, the following should be provided <br /> a) Approval of the U S EPA or Cal/EPA for standardized methods, <br /> b) For EPA or standardized methods, a reference to the source of the <br /> method, and <br /> C) For non-standard methods, a complete SOP,with method detection limit, <br /> should be included as an integrated part of the sampling and analysis <br /> program to be approved by the Cal/EPA and specified in the permit <br /> I28 Field and Laboratory Quality Assurance/Quality Control <br /> One of the fundamental responsibilities of the RP is the establishment of continuing <br /> programs to ensure the reliability and validity of field and analytical laboratory data <br /> gathered as part of the overall ground-water monitoring program Refer to SW-846(U S <br /> EPA, 1986) for requirements and guidance on establishing and maintaining field and <br /> laboratory quality control programs In general, laboratory quality assurance and quality <br /> control (QA/QC)programs should address the following areas <br /> o Control samples, <br />�• o Acceptance criteria, <br /> o Deviations, <br /> o Corrective action for sampling and analysis procedures, <br /> a Data handling, <br /> o Laboratory control samples, <br /> o Method blanks, <br /> a Matrix-specific effects <br /> The RPs' SAP should explicitly describe the QA/QC program that will be used in the field <br />' and laboratory The Data Quality Objectives (DQOs)of the project should be described <br /> in terms of precision, accuracy, completeness,representativeness and comparability for <br /> both field activities (sampling, measurements and screening) and laboratory analyses, <br />' including the project required acceptance limits and means to achieve these QA objectives <br /> Refer to US EPA, QA/G-4 for a discussion of DQOs In addition, the preventative <br /> maintenance procedures to be used for the field and laboratory instruments and the <br />' ground-water monitoring system should be described A table showing the type of <br /> maintenance to be performed and the frequency is appropriate Many RPs use commercial <br /> 28 <br />