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Each monitor 11 was finished with a lo�..ing cover set into concrete. A watertight, locking cap sealed the well casing inside the cover. Each cover was set above the existing grade to provide additional protection against infiltration of surface water. The monitoring wells were developed using a pneumatic pump and new polyethylene tubing. The wells were purged until purgewater was cleared of fines or ten well volumes were removed. 2. 2 Soil Sampling Soil samples were collected continuously from boring MW1, and at approximately five foot intervals from the remaining borings using a 2-inch inside diameter split spoon sampler containing three brass tubes . The sampler was driven 18 inches beyond the tip of the augers by a 140-pound hammer dropping 30 inches. The number of blows required to advance each six inch interval was counted and recorded as an aid to assessing the surficial geology of the site. The sampler was then retrieved from the boring, and the sample tubes were extracted from the sampler. Drill cuttings and drive samples were logged by an experi- enced field geologist using the Unified Soil Classification System. Descriptions of the soil types and well construc- tion details recorded on a boring/well log are included in Appendix I. 2.3 Groundwater Sampling and Analysis The volume of water in each well was calculated before collecting groundwater samples. Approximately three well volumes of water were evacuated from each well using a pneumatic pump. Turbidity, conductivity, pH, and tempera- ture were monitored during the purging of each well and were allowed to stabilize prior to collecting samples for analy- sis. Water samples were collected from each well using a clean teflon bailer. The sample water was transferred from the bailer to the appropriate sample containers with as little agitation as possible. Sample containers were labeled with the following informa- tion: well number, site location, date and time of sample collection, type of analysis requested, and the initials of the person collecting the sample. The samples were placed on ice and submitted to Sequoia Analytical Laboratories (DHS Cert . #1210 ) . A chain-of-custody form accompanied the groundwater samples from the site to the laboratory to serve as a record of sample possession. 2