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APPENDIX C <br /> Diamond Pet Food Processors of Ripon,LLC June 30,2011 <br /> Report of Waste Discharge—Groundwater Sampling Plan Page 6 of 7 <br /> LABORATORY QUALITY CONTROL PROCEDURES <br /> The quality assurance program for the analytical laboratory(Basic Laboratory) is described in their <br /> Quality Assurance Program Plan (QAPP), which is available from the laboratory upon request. The <br /> QAPP describes mechanisms the laboratory employs to ensure that all data reported meets or exceeds <br /> all applicable USEPA and State requirements. It describes the laboratory's experience, its <br /> organizational structure, and procedures in place to ensure quality of the analytical data. The QAPP <br /> outlines the sampling, analysis, and reporting procedures used by the laboratory. The laboratory is <br /> responsible for the implementation of and adherence to the quality assurance and quality control <br /> requirements outlined in the QAPP. <br /> ANALYTICAL METHODOLOGIES <br /> The analytical methodologies to be used by the laboratory for all parameters in the monitoring <br /> program will be an approved EPA or Standard Methods and will be selected by the laboratory to meet <br /> the sampling objectives. <br /> DATA QUALITY REVIEW,REPORTING AND RECORDKEEPING <br /> Prior to the submittal of a monitoring report to the CVRWQCB, several data evaluations, reporting, <br /> and recordkeeping tasks will be implemented. The following sections describe the evaluation, <br /> reporting, and recordkeeping procedures that are followed upon receipt of the analytical report. <br /> INITIAL QA/QC CHECKS <br /> Before the data are subjected to statistical analysis, Diamond staff or Consultant personnel will <br /> evaluate the data by examining the quality control information accompanying the data report from the <br /> laboratory. Relevant quality control data include measures of accuracy(percent recovery), precision <br /> (relative percent difference [RPD]), and sample contamination (blank determinations). Data that fail <br /> any of these checks will be flagged for closer evaluation. Results of the evaluation will be submitted <br /> with the analytical data in the routine monitoring report. <br /> The potential for sample contamination is assessed by measurements of"blank" samples. Blanks are <br /> samples of ultra-pure laboratory water that are not spiked with any analytes and are carried through <br /> the field sampling and laboratory environments. These samples are known as "field," "lab," and <br /> "equipment" blanks. It is assumed that any analytes that occur in the field or laboratory that might <br /> add to the concentration of the analyte in the sample will be picked up by the blank samples and <br /> measured. If any of the analytes of interest are found in the blank samples it is an indication of <br /> potential contamination of the unknown sample. <br /> 010070.00, Task I Lawrence&Associates <br /> w:Iclientsldiamond pet foods1010107.00-ripon rowdldiamondpet_rowd_june2011 draft.docx <br />