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own-R-411591 <br /> E <br /> CALIFORNIA WATER LABS <br /> 1-7 QUALITY ASSURAMOLQUALITY CONTROL <br /> MANAGEMENT SUMMARY <br /> (Contlnusd) <br /> i so that any procedure performed can be reconstructed from supporting documenta- <br /> tion,with an accurate audit trail to their source. CIVL utilizes a process. -,the tracking <br /> of all reagents, standards, and preparations. Information that Is documented for <br /> reagents and"as-is standards`includes the code number.Item name,manufacturer, <br /> lot number, concentration,by whom it was opened, and riie date emptied. Prepara- <br /> tions and standards are documented with the code,date,p:.,eparation codes ofreagents <br /> or standards used,volume prepared, preparer's name, standardization date, actual <br /> concentration,restandardization or expiration date,and any comments pertaining to <br /> the preparation. <br /> ^4 <br /> Equipment Maintenance <br /> All equipment and instrumentation used in an analysis must be properly main- <br /> tained and verified. Specific procedures for preventive maintenance are outlined for <br /> all major analytical instrumentation. A laboratory logbook is kept with each <br /> instrument,and all routine maintenance is recorded. Copies of work rendered under <br /> service contracts are kept Ina elle. Balances are verified daily and before use with Class <br /> P weights. The Class P working weights are verified against NBS Class S weights on <br /> a monthly basis. Class S weights are sent for verification yearly. Analytical balances <br /> are serviced and calibrated by a certified technician on a yearly basis unless there is <br /> € aroblem. A delivery check <br /> p ry is performed monti-.ly on fixed-volume pipets. The <br /> temperatures of all storage refrigerator/freezer;, incubators, ovens, furnaces, and <br /> water baths are monitored daily. Working thermometers are verified against an NBS <br /> thermometer every six months. Meters for pH and conductivity are calibrated daily <br /> and before use. Conductivity on the de-ionized water is measured, and the systems <br /> physically examined,on a daily basis.To prevent laboratory contamination,fume hood <br /> r velocities are remeasured monthly. The autoclave is cleaned weekly, with the kilet <br /> ampule test and cycle timing performed monthly. All other laboratoiy equipment is <br /> maintained according to the manufacturers's specifications. Procedures for the <br /> washing of laboratory glassware differ from lab to lab and are posted in the applicable <br /> areas. <br /> i <br /> i..� ALL OF THE ABOVE PROCEDURES ARE DOCUMENTED IN THE APPROPRIATE <br /> LOGBOOK OR ON A DATA SHEET AFFIXED TO THE EQUIPMENT. <br /> -:, <br /> QUALITY CONTROL. <br /> Quality assurance consists of developing and Implementing a quality strategy for <br /> lab operations. personnel procedures, and documentation. Quality control, on the <br /> other hand,is the s eciflc tactic to ensure that <br /> procedures p.ocedures foranalysis follow the desire <br /> strategy. Unless a particular method requires more stringent procedures.CWL follows <br /> these guidelines: <br /> !.1 <br /> Method Blanks <br /> ' Method blanks are prepared and analyzed for every 20 samples cr one per batch, <br /> whichever is most frequent. Samples associated with method blanks not meeting <br /> "f laboratory standards must be reprepared and reanalyzed. Method blanks for volatile <br /> organics are analyzed every twelve hours. <br /> t:4 4 <br /> Y/J9 <br /> i <br />