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�{ Quik Stop Market No. 132 January b, 1993 Project No. F7132.34 Page 2 • sampling, for laboratory analysis, of five groundwater monitoring wells (including the two new wells) located on or adjacent to the site as required for quarterly groundwater sampling and analysis; • survey of the new groundwater monitoring wells and related areas of the site to a known datum; ' review and analyses of all laboratory results; and, • preparation of this report. FIELD OPERATIONS ' The field operations for this project included: drilling, sampling, and logging of exploratory borings; groundwater monitoring well construction, development, and ' sampling; and site survey. Exploratory Borings ' On December 9, 1992, a P.C. Exploration Mobile B-53 drilling rig, equipped with 4 1/4-inch inside diameter hollow-stem augers, was used to drill the two soil borings required for soil sampling and monitoring well installation (Plate 2). The borings were logged by a RESNA geologist with the soil described and classified according to the RESNA Soil Sampling Protocol (Appendix A). 1 Soil samples were collected through the hollow stem auger at approximately 5-foot depth intervals or at the direction of the RESNA geologist. When the desired sample ' depth was reached, a modified California split-spoon sampler, equipped with three clean brass liner tubes, each six inches long and two inches in diameter, was used to collect and retain soil samples. The sampler was advanced into the undisturbed soils as ' described in the RESNA Soil Sampling Protocol (Appendix A). After recovery from the borehole and the sampler, the bottom sample liner was immediately covered with aluminum foil and plastic end caps, labeled with a unique sample number and pertinent ' sample information, and packed into a cooler chilled with ice. During sampling operations the organic vapor monitor (OVM) was not operating properly and consequently no OVM readings are available. The soil in the remaining sample liners ' was visually characterized for logging purposes. Completed boring logs are included in Appendix B. Upon completion of field characterization, the examined soil was placed in 55-gallon steel-drums with the borehole cuttings. Groundwater Monitoring Well Construction ` Upon completion of the exploratory borings, a groundwater monitoring well was constructed in each borehole. The monitoring wells were constructed using 2-inch- diameter Schedule 40 polyvinyl chloride (PVC) blank and factory-slotted casing with 0.020-inch slot size. Only flush-threaded couplings were used; no solvents or cements