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HORIZON ENVIRONMENTAL INC. DRILLING, SOIL SAMPLING, WELL DEVELOPMENT AND SURVEYING FIELD METHODS AND PROCEDURES These procedures describe pre -field activities, drilling, soil sampling, measurement of depth to groundwater, well development and groundwater sampling, and well surveying activities. Horizon Environmental Inc. (Horizon) will conduct field activities in general accordance with these field procedures. 1.0 HEALTH AND SAFETY PLAN Field work performed by Horizon and subcontractors at the site will be conducted according to guidelines established in a Site Health and Safety Plan (SHSP). The SHSP is a document that describes the hazards that may be encountered in the field and specifies protective equipment, work procedures, and emergency information. A copy of the SHSP will be at the site and available for reference by appropriate parties during work at the site. The SHSP plan shall comply with health and safety guidelines in the Horizon Health and Safety Program Handbook. 2.0 LOCATING UNDERGROUND UTILITIES Prior to commencement of fieldwork, the location of underground utilities will be researched with the assistance of Underground Service Alert (USA). USA will contact the owners of the various utilities in the vicinity of the site to have the utility owners mark the locations of their underground utilities. Work associated with the borings and monitoring well installations will be preceded by manual hand augering to avoid contact with underground utilities. 3.0 SOIL BORING AND SOIL SAMPLING PROTOCOL Soil borings and soil sampling will be conducted under the supervision of a Horizon geologist. The soil borings are typically advanced utilizing a truck -mounted hollow -stem auger drilling rig. To reduce the chances of crass -contamination between bore holes, down hole drilling equipment and sampling equipment will be decontaminated between borings. To reduce cross -contamination between samples, the split -barrel sampler will be decontaminated in a soap solution and double -rinsed between each sampling event. Soil sampling will be conducted in general accordance with ASTM 1586-84. This procedure involves a split -barrel sampler (California -type sampler) lined with brass sample sleeves that is driven into the soil by a 140 -pound weight falling 30 inches. The number of blow counts required to advance the sample 18 inches in 6 -inch intervals will be recorded. Generally, the bottom soil sample sleeve will be sealed using Teflon sheets and plastic caps, labeled, and promptly placed in iced storage for potential analysis. The soil sample will be submitted to a State -certified laboratory for the required analyses. Generally, the upper portions of each soil sample will be extruded from the brass sleeves, placed in a plastic bag, and sealed for later screening with a calibrated (using isobutylene) photo -ionization device (PID). Another portion of the soil sample was used for classification and description. After the portion of the soil sample is placed in the A - ] HORIZON ENVIRONMENTAL INC.