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0 <br /> Appendix B <br /> Steam cleaning effluent was contained in 55-gallon drums and temporarily stored on site. <br /> The disposal of the effluent will be the responsibility of the client. <br /> Drill cuttings generated during the drilling procedure were placed in 55-gallon drums and <br /> located on site. The soil is typically characterized by collecting and analyzing samples <br /> from the drum(s). Stratus Environmental will recommend an appropriate method for <br /> disposition of the cuttings based on the analytical results. The client will be responsible <br /> for disposal of the drill cuttings. <br /> Soil Sample Collection <br /> During drilling, soil samples were collected in cleaned brass, two by six inch tubes. The <br /> tubes were set in an 18-inch-long split-barrel sampler. The sampler was conveyed to <br /> bottom of the borehole attached to a wire-line hammer device on the drill rig. When <br /> possible, the split-barrel sampler was driven its entire length, either hydraulically or by <br /> repeated pounding a 140-pound hammer using a 30-inch drop. The number of drops <br /> (blows) used to drive the satripler was recorded on the boring log. The sampler was <br /> extracted from the borehole, and the tubes containing the soil samples were removed. <br /> Upon removal, the ends of the lowermost tube were sealed with Teflon sheets and plastic <br /> caps. Soil samples for chemical analysis were labeled, placed on ice, and delivered to a <br /> state-certified analytical laboratory, along with the appropriate chain-of-custody <br /> documentation. <br /> Soil Classification <br /> As the samples are obtained iri the field, they were classified by the field geologist in <br /> accordance with the Unified Soil Classification System. Representative portions of the <br /> samples were retained for further examination and for verification of the field <br /> classification. Logs of the borings indicating the depth and identification of the various <br /> strata and pertinent information regarding the method of maintaining and advancing the <br /> borehole was prepared. <br /> Monitoring Well Installation <br /> Monitoring wells were completed by installing 2- to 4-inch-diameter Schedule 40 <br /> polyvinyl chloride (PVC) casing. The borehole diameter for a monitoring well was a <br /> minimum of four inches larger than the outside diameter of the casing. <br /> A monitoring well is typically cased with threaded, factory-perforated and blank <br /> Schedule 40 PVC. The perforated interval consists of slotted casing, with 0.01 inch-wide <br /> by 1.5-inch-long slots, with 42 slots per foot. The screened sections of casing are factory <br /> machine slotted and were installed approximately 5 feet above and 10 feet below I <br /> first-encountered water level. The screened interval will allow for seasonal fluctuation in <br /> water level and for monitoring floating product. A threaded or slip PVC cap is secured to <br /> the bottom of the casing. The slip cap can be secured with stainless steel screws or <br /> friction; no solvents or cements are used. Centering devices may be fastened to the <br /> i <br />