Laserfiche WebLink
�KLEINFELDER <br /> enver vcovre.egmsowvo.. <br /> After the wells are developed, the aquifer is allowed to equilibrate for at least 24 to 48 hours. <br /> The wells can then be purged and sampled. Purging and sampling may be accomplished with <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 3 to 5 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 <br /> was collected, the employee number of the individual who performed the sampling, and a <br /> ' unique five-digit sample identification number. A custody seal is also placed on the sample in <br /> such a way that any attempt to tamper with the sample is easily visible. An example of a <br /> sample label 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 <br /> ' were 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 /> ' 101486.6/SAC14R02453 Page A-5 July 25, 2014 <br /> 0 2014 Kleinfelder <br />