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M Horizon Environmental Inc. WELL DESTRUCTION FIELD METHODS AND PROCEDURES The following section describes field procedures that were utilized by Horizon Environmental Inc. (Horizon) personnel in performance of the tasks involved with this project. 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. 2.0 LOCATING UNDERGROUND UTILITIES Prior to commencement of work on site, 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. Well Destruction permits will be acquired prior to the commencement of work at the site. 3.0 GROUNDWATER DEPTH EVALUATION Each monitoring well is opened and allowed to equalize to atmospheric pressure prior to sounding. Total depth (TD) and depth -to -water (DTW) are measured to the nearest 0.01 -foot using an electronic, hand-held, water -level indicator. The measuring point is the survey mark on the top of the well casing. 4.0 WELL DESTRUCTION The well box will be removed and the well construction materials will be drilled out to approximately one foot below the recorded total depth of the well. The borehole will be backfilled with neat cement grout emplaced through a tremie pipe from the bottom to the top of the borehole. After grouting is completed, the tremie pipe will be removed and additional neat cement will be added to top off the borehole. The upper foot of the borehole will be backfilled with quick -set aggregate cement mix tinted to match the surrounding surface. Project No. 34050-17.war HORIZON ENVIRONMENTAL INC.