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PRE-FIELD WORK ACTIVITIES <br /> Health and Safety Plan <br /> Field work performed by Delta and its subcontractors at the site is conducted according to guidelines established in a Site <br /> Health and Safety Plan(SHSP). The SHSP is a document that describes the hazards that may be encountered in the field <br /> and specifies protective equipment, work procedures and emergency information. A copy of the SHSP is at the site and is <br /> available for reference by appropriate parties during work at the site. <br /> Locatin2Underground Utilities <br /> Prior to commencement of any work that is to be below surface gradd,the location of the excavation, boring, etc. is marked <br /> with white paint as required by law. An underground locating service such as Underground Service Alert (USA) is <br /> contacted. The locating company contacts the owners of the various utilities in the vicinity of the site to mark the locations <br /> of their underground utilities. A private locator may also be contacted for a private independent clearance. Any invasive <br /> work is preceded by hand auguring to a minimum depth of five feet below surface grade to avoid contact with underground <br /> utilities. <br /> FIELD METHODS AND P OCEDURES <br /> Soil Borings <br /> A Delta Environmental Consultants, Inc. geologist continuously logs (if required) each borehole during drilling and checks <br /> drill cuttings for indications of first recognizable occurrence of ground water. In addition,the geologist screens soil samples <br /> for volatile hydrocarbon vapors using either a portable photo-ionizatiori detector or flame ionization detector. <br /> Monitoring <br /> The ground water monitoring wells were drilled with a Sonic Drilli g rig. Soil samples are typically collected in <br /> clean brass or stainless steel tubes of varying diameters and lengths (typically two by six inches). The tubes arc <br /> typically set in an 18-inch-long split-barrel sampler. For continuous sampling, a two or four foot long core barrel <br /> may be utilized. The sampler attached either to the end of drill rods or on a wire-line hammer device, is conveyed to <br /> the bottom of the borehole. When possible,the sampling devise is dr ven its entire length either hydraulically or by <br /> repeatedly pounding a 140-pound hammers using a 30-inch drop (blow). The number of drops used to drive the <br /> sample is recorded on the boring log. The sampler is extracted from the borehole and the tubes containing the soil <br />