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• A disposable polyethylene or stainless steel bottom valve bailer will be used for <br />collection of each groundwater sample. Polyethylene bailers will be discarded after each <br />sample is collected. Stainless steel bailers will be washed between wells using a bristle <br />brush with a detergent rinse followed by two clear water rinses, and a final <br />deionized/distilled water rinse. The bailers will be air dried or dried using paper towels. <br />• New nylon rope will be used to lower the bailers into the wells. The nylon rope will be <br />discarded after each well. <br />• Groundwater samples will be placed into laboratory -supplied containers containing <br />preservatives. <br />• Groundwater will be discharged from the bailer via a bottom -emptying device. <br />Discharge to the containers should be conducted in a manner to minimize bubbling and <br />agitation of the liquid. The containers will be filled to the top forming a meniscus to <br />minimize the headspace. <br />• Water removed from the well will be contained in a portable polyethylene tank. The tank <br />will be transported and stored at the IT office pending laboratory analysis and disposal of <br />the groundwater. <br />• Sample Retention and Analysis Procedures <br />• Chain of custody procedures, including the use of chain of custody forms, will be used to <br />document sample handling and transport from collection to delivery to the laboratory for <br />analysis. <br />• The samples will be placed on ice in an insulated chests overnight in the custody of an IT <br />employee. The samples will be picked up within approximately 48 hours of collection by <br />a courier supplied by the laboratory, or will be delivered to the laboratory by IT personnel <br />within approximately 48 hours of collection. The samples will be transported to the <br />laboratory in a motor vehicle. <br />Soil samples will be labeled with the boring number, and the sample collection depth. <br />For example, "MW -2R-10" represents monitoring well 2 collected at a depth of 10 feet <br />below the ground surface. <br />• Laboratory quality assurance/quality control procedures are summarized below: <br />— Method Blank Frequency = one per 2 samples <br />— Matrix Spike/Matrix Spike Duplicate = one per 2 samples <br />— Laboratory Control Sample/Laboratory Control Sample Duplicate = one per 2 <br />samples <br />IT CORPORATION <br />SAC:\\\SACRFP 1\COMMON\sacDP\2002\PRJ\PJ8\880\8800391 A.2ac.doc <br />(01040000) <br />A-4 <br />