ARCHIVED REPORTS XR0006117 - Laserfiche WebLink

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SAMPLE COLLECTION AND HANDLING (Cont. Field Blank: This sample contains laboratory pure water which has been carried through sample collection devices (e.g. pass the water through the composite sampler) . Analysis of this sample determines whether the sampling equipment is contaminating the sample. Required 2 times/yr for monthly monitoring, 3 time/yr if less frequent . Field Duplicate: This is a separate sample collected at the sampling site. It will provide a measure of the homogeneity of the sample material and the consistency of the sampling technique. Results are suspect if not within 10% of one another. This is especially important for grab samples. Duplicates are required on 10% of all analyses, or 1 time/yr if less than 10 analyses are performed in a calandar year. Sample Analysis All pretreatment analyses must be performed using prescribed EPA methods (Appendix IV) An industry that contracts with a laboratory to perform pretreatment analyses must obtain a statement from that laboratory, documenting that it is certified by the State of California for the analytical methods used. If pretreatment samples are analyzed in-house, your laboratory must be State certified for the particular method used in the analysis, and evidence of proper certification must be on file with the Municipal Utilities Department. EQUIPMENT AND INSTRUMENTS Maintenance Instrument and equipment performance must be monitored continuously. Any indication of improper functioning should be reported to the Supervisor and noted in a designated logbook. Major repairs and adjustments to equipment and instruments must be performed to manufacturer's specifications. General analytical equipment must: be maintained semi-annually and on an as-needed basis. Compositing samplers are to be maintained on a weekly basis and should be on a Preventative Maintenance Program. Data regarding this maintenance should be entered into a designated logbook. Essential operating parts and components are to be kept in stock (use manufacturer's recommended list) and immediatly available for repairs and service when needed. Calibration PH Meters are to be standardized on a regular schedule. The values, time and operator's I.D. are to be recorded in a designated logbook (See recommended pH calibration procedures in Appendix V) . ph buffers are to be purchased already prepared, and traceable to National Bureau of Standards. Flow meters are to be calibrated 2 times/yr by certified personnel . Records Performance, maintenance and calibration records are to be kept for the various pretreatment instruments . A11 printed data generated by an instrument (e.g_ pH meters and flow meters) will be dated and annotated to clearly identify samples. These charts and print-outs are to be retained as a permanent record for three years . . 3