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QUAL X TY A S SURAivCE MANUA L <br /> FOR <br /> SELF-MONITORED INDUSTRIES <br /> INTRODUCTION AND PURPOSE <br /> A Quality Assura,-ice (QA) Yragru.�, is a series or <br /> accuracy of analytical results, practices designed to ensure the <br /> Cnetral Valley Region, has mandated thatfthe�Cittyrnagal ofnStock-ton implementWater ualityoatQAlprogram <br /> for the self-monitored industries. This document presents the elements of the QA <br /> program that the City will require to be initiated and maintained by its industrial <br /> dischargers. <br /> Self-Monitoring results sent to the City are used for billing and enforcement as well <br /> as in determining compliance with Permit Conditions. <br /> obtained during analyses It is essential that the values <br /> are accurate and reliable. Results from samples obtained by <br /> the City's Environmental Control Officers should correlate with the results of samples <br /> taken internally by the discharger. <br /> Quality Assurance: The overall structure used to monitor the sampling r <br /> from sample collection through sample analysis. The Qq p <br /> , chain programincludes the review <br /> of sample collection protocols, of custody procedures, and quality control <br /> Quality Control (QC) : The mechanical steps taken to implement a quality <br /> program. Field QC would include appropriate assurance methods, sample containers, <br /> preservation, and the collection of duplicates, backgrounds and blanks. <br /> When the practices outlined in this manual are uniformly and consistently applied, the <br /> industrial discharger will benefit in two ways: The results of analyses will be <br /> defensible; and problems with treatment and sample handling are easily identified for <br /> correction. <br /> SAMPLE COLLECTION AND HANDLING <br /> The importance of QA/QC in sample handling is to ensure the integrity of the sample; <br /> i.e. , to prevent possible contamination from a variety of sources. <br /> Sample Containers and Sampling Apparatus <br /> Use appropriate sampling equipment. 1 <br /> (borosilicate) or plastic (polyethylene or Polypropylene)Most samples can be collected in glass <br /> information published as "Table II -- Required Containers, Preservation Techniques, and <br /> Bolding Times" from Federal Register, 40CFR Part 136.3. <br /> 1 <br />