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Stratus' office, the samples are transferred to a locked refrigerator cooled to approximately 4° Celsius. Chemical preservation is controlled by the required analysis and is noted on the chain-of-custody form. The number -of samples collected to evaluate impact to soil is determined by the overseeing registered geologist. This information and rationale is typically presented in the work plan. Stockpiled Drill Cuttings and Soil Sampling Soil generated during drilling operations will be stockpiled onsite. The stockpile will be set on and covered by plastic sheeting in a manner to prevent rain water from coming in contact with the soil. Prior to collecting soil samples, Stratus personnel will calculate the approximate volume of soil in the stockpile. The stockpile will then be divided into 50 cubic yard (volume) sections, if warranted, for sampling. Soil samples will be collected at 0.5 to 2 feet below the surface of the stockpile. Four soil samples will be collected from the stockpile and composited into one sample by the laboratory prior to analysis. The soil samples will be collected in clean brass, two by six inch tubes using a hand driven sampling device. To reduce the potential for cross-contamination between samples, the sampler will be cleaned between each sampling event. Upon recovery, the sample container will be sealed at each end with Teflon T11 sheeting and plastic caps to minimize the potential of volatilization and cross-contamination prior to chemical analysis. The soil sample will be labeled, placed in an ice chest cooled to 4° C, and delivered to a state-certified analytical laboratory, along with the appropriate chain-of-custody documentation. Sample Itdentiificatio¢n and Chain-of-Custody Sample identification and chain-of-custody procedures document sample possession from the time of collection to ultimate disposal. Each sample container submitted for analysis has a label affixed to it to identify the job number, sampler, date and time of sample collection, and a sample number unique to that sample. This information, in addition to a description of the sample, field measurements made, sampling methodology, names of onsite personnel, and any other pertinent field observations, are recorded on the borehole log or in the field records_ A chain-of-custody form is used to record possession of the sample from time of collection to its arrival at the laboratory. When the samples are shipped, the person in custody of them relinquishes the samples by signing the chain-of- custody form and noting the time. Monitoring Well Installation Monitoring wells will be completed by installing two or four-inch-diameter Schedule 40 polyvinyl chloride (PVC) casing. The two-inch diameter monitoring wells will be AM installed using 8-inch diameter hollow stem augers, and the four-inch diameter monitoring wells will be installed using 10-inch diameter hollow stem augers. Appendix A Page 3