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KLEINfELDER <br /> Teflon bladder pumps and/or bailers. During the purging of the wells, field parameters (pH, <br /> conductivity, and temperature) are monitored. Samples are collected after the field parameters <br /> have stabilized (normally requiring the removal of three to five well volumes). Water sampling <br /> containers are supplied and prepared by the laboratory. These sample containers are <br /> immediately sealed after sample collection and placed in an iced cooler. At the end of the day, <br /> the water samples are delivered under chain-of-custody to an analytical laboratory certified by <br /> the state for the planned chemical analysis. <br /> A-3.3 Sample Handling <br /> After labeling, the sample is immediately stored in an iced cooler for transport to the analytical <br /> laboratory. The label includes Kleinfelder's name,job number, the date and time the sample was <br /> collected, the employee number of the individual who performed the sampling, and a unique <br /> five-digit sample identification number. A custody seal is also placed on the sample in such a <br /> way that any attempt to tamper with the sample is easily visible. An example of a sample label <br /> and custody seal are attached at the end of this appendix. <br /> A Kleinfelder chain-of-custody form is attached to the cooler. The chain-of-custody form <br /> includes Kleinfelder's name, address and telephone number, the employee number of the <br /> individual who performed the sampling, the sample numbers, the date and time the samples were <br /> collected, the number of containers each sample occupies, and the analyses for which the <br /> samples are being submitted. The chain-of-custody form is signed by each person who handles <br /> the samples, including all Kleinfelder employees and the receiving employee of the analytical <br /> laboratory when the samples are delivered. An example of the chain-of-custody form is <br /> attached. <br /> A-3.4 Equipment Decontamination <br /> To reduce the potential for cross-contamination between wells, all developing and sampling <br /> equipment is washed in a trisodium phosphate solution and rinsed in distilled water or steam <br /> cleaned prior to use in the next monitoring well. <br /> 20-0232-01/2011 R1514 Page A-5 <br /> 0 2001,Kleinfelder,Inc. December 6,2001 <br />