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1 <br /> f <br /> I <br /> { APEX ENYIROTECH, INC. <br /> -STANDARD OPERATING PROCEDURES <br /> RE: LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL 1 <br /> SOP-5 <br /> In addition to routine instrument calibration, replicates, spikes, blanks, spiked blanks, and certified reference <br /> materials are routinely analyzed at method-specific frequencies to monitor precision and bias. Additional <br /> components of the laboratory Quality AssurancelQuality Control program include: <br /> � 3 <br /> 1. Participation in state and federal laboratory accreditationicertification programs; <br /> E 2. Participation in both U.S. EPA Performance Evaluation studies (WS and WP studies) and inter-laboratory <br /> E <br /> performance evaluation programs; <br /> 3. Standard operating Procedures describing routine and periodic instrument maintenance; <br /> 4 <br /> 4. "Out-of-Control"/Corrective Action documentation procedures; and, <br /> 5. Multi-level review of raw data and client reports. <br /> i <br /> j <br /> ATTAGHMENTI$OR91.R7LY 1993 <br /> - j <br />