Laserfiche WebLink
34A}�� �: F �F1O 2 7 <br /> 2. Immediately after sample collection and labeling,the samples will be sealed in a <br /> plastic batt and placed in a sturdy ice chest. The temperature in the ice chest will <br /> be maintained at or below 4°C. <br /> 3. Soil samples and groundwater samples will be delivered to a State of <br /> Californis-cettificd chemical analytical laboratory within 48 hours of sampling <br /> along with a completed chain-of-custody record. <br /> 4. Soil samples not selected for laboratory analyses will be placed in iced storage <br /> for no fewer than 14 days. <br /> 6.0 QUALITY ASSLTtANCEIQUALITY CONTROL <br /> In order to ensure a successful sampling program, Quality Assurance and Quality Controi <br /> procedures will Ix carefully followed. The key points of the Quality Assurance procedures <br /> pertain to the submittal of quality assurance samples and document control (decontamination <br /> procedures have been previously discussed). <br /> 6.1 ' Quality assurance Satrapies <br /> Quality a,surance samples will be used to evaluate the quality of the data obtained from <br /> the field Frogram. Two distinct types of quality assurance samples will be used for this <br /> purpose. <br /> 1. Blind duplicates of water samples will be submitted to the testing <br /> laboratory at a minimum rate of 1 per 10 regular samples obtained, but <br /> ao less than one per ice chest,to determine the precision of the <br /> laboratory analyses. <br /> 2. F-eld travel blanks will be submitted at a rats of 1 per 10 water samples <br /> collected, but no less than one per ice chest, in order to determine if <br /> cross contamination occurred in transit. All field travel blanks will be <br /> supplied by the testing laboratory. <br /> Soil and groundwater samples will be submitted to a State of California-certified <br /> analytical1aboratory for chemical analyses. Established QA/QC procedures for <br /> analytical operations will include sample custody procedures,Standards of analytical <br /> accuracy, analyses of matrix spikes and method blanks,data reducrion,verification of <br /> raw analytical data, and maintenance of control charts to monitor.analytical <br /> performance. These QA/QC procedures are outlined in the laboratory Quality <br /> Assuranc('/Quality Control Plan which is available upon request. Organic chemical <br /> analyses will be performed in conformance with standard procedures established by the <br /> United States Environmental Protection Agency(EPA) in"Guidelines Establishing Test <br /> Procedures for the Analysis of Pollutants Under the Clean Water Act" <br /> {40 CFR]'art 136, October 1984). The laboratory is periodically evaluated through <br /> external audits conducted by the EPA and the State of California Department of Toxic <br /> .Substances Control using QC laboratories. <br /> 402331-98_63 A-6 <br />