Laserfiche WebLink
WORWEST <br /> COR PORAT ION <br /> 2.5 QUALITY ASSURANCE AND QUALITY CONTROL <br /> 2.5.1 Review of Analytical Results <br /> Independent laboratories, recognized by the National Environmental Lab Accreditation <br /> Program (NELAP), will be responsible for all of the water quality analyses and results. <br /> Analytical results will be reviewed promptly upon receipt from the laboratory for sample <br /> preservation and integrity, data completeness, calibration and quality control sample <br /> frequency, quality control results, and other data quality related issues. The temperature <br /> of the samples upon receipt at the lab, effective preservation using acids or bases as <br /> appropriate, and appraisal of holding times will be evaluated in the sample preservation <br /> and integrity assessment. The results will be compared to the analysis list, ensuring the <br /> requested analytical methods are followed and detection limits are consistent with the <br /> project specifications. Any analytical abnormalities will be examined, and the laboratory <br /> will be contacted if there are any questions about the impact from the anomalies to <br /> sample results. <br /> The cation-anion balance, relationship between total dissolved solids (TDS) and specific <br /> conductance, comparison of field and laboratory pH, comparison of field and laboratory <br /> specific conductance, and calculated and gravimetric TDS results will be evaluated for all <br /> samples. The laboratory will be contacted if there are any issues, and results will be <br /> reanalyzed and reports re-issued if necessary. <br /> This sampling plan does not include extra samples for QA/QC purposes such as field <br /> blanks, trip blanks, or duplicates. Samples are collected following rigorous standard <br /> operating procedures that include using new bottles, wearing gloves during sampling, and <br /> completing chains of custody for each sample. Norwest's experience with the NELAP <br /> certified laboratory performing the analyses has demonstrated that errors are extremely <br /> rare and that they can be identified by analyzing the results as discussed above. The <br /> laboratory also has internal QA/QC policies and procedures that include matrix spike, <br /> duplicate, and blank analyses. <br /> TRANSIT MIX CONCRETE CO. <br /> SURFACE WATER AND GROUNDWATER MONITORING PLAN <br /> 2-10 <br />