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`...� `t PRE-FIELD WORK ACTIVITIES Health and Safety Plan Field work performed by Delta and Delta's subcontractors at the site is conducted according to guidelines established in a Site Health and Safety Plan (SHSP). The SHSP is a document which describes the hazards that may be encountered in the field and specifies protective equipment, work procedures, and emergency information. A copy of the SHSP is at the site and available for reference by appropriate parties during work at the site. Locating Underground Utilities Prior to commencement of any work that is to be below surface grade, the location of the excavation, boring, etc., is marked with white paint as required by law. An underground locating service such as Underground Service Alert (USA) is contacted. The locating company contacts the owners of the various utilities in the vicinity of the site to have the utility owners mark the locations of their underground utilities. Any invasive work is preceded by manual hand augering to a minimum depth of five feet below surface grade to avoid contact with underground utilities. FIELD METHODS AND PROCEDURES Direct Push Technology.Soil and Ground Water Sampling A well known example of direct push technology for soil and ground water sampling is the Geoprobe®. For the purpose of this field method,the term geoprobe will be used instead of direct push technology for soil and ground water sampling. The geoprobe is typically used without a drill rig. The standard geoprobe consists of a sample barrel and drive casing. When a soil sample is to be collected for laboratory analysis cleaned brass or stainless steel tubes of varying diameters and lengths(typically one by six inches) are used as the sample barrel. The sample barrel and drive casing are simultaneously pushed, pounded or vibrated three to five feet into the soil. The sample barrel containing the soil is removed and a new or cleaned sample barrel is then lowered to the bottom of the boring. The process is repeated until the desired depth is reached. The soil samples are labeled and handled according to the Quality Assurance Plan(QAP). If ground water is encountered,a water sample can be collected with a bailer or tubing utilizing a peristaltic pump. The soil sample is collected, labeled, and handled according to the QAP. A geologist from Delta Environmental Consultants, Inc. continuously logs (if required) each borehole using the Soil Classification method section during advancement and constantly checks soil samples for indications of the first recognizable occurrence of ground water. A portion of the sample may be screened in the field, when required according to the Soil Sample Screening method section. CL006.KS