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Groundwater Well Development Field Standard Operating Procedure <br /> SWE-FSOP-602;Revision 1 Ahtna Southwest Environmental Operations <br /> • Development Procedures (Section 4.3) <br /> • Documentation (Section 4.4) <br /> • Demobilization/Site Restoration (Section 4.5) <br /> 4.1 Pre-Field Tasks <br /> Preparation and coordination tasks for sonic drilling generally include the activities described below. <br /> 4.1.1 Clearances <br /> Before starting well development, confirm that groundwater well locations have been appropriately <br /> cleared of potential overhead, surface, and subsurface hazards per the project work plans. Before raising <br /> the mast on any development rig, ensure appropriate clearances are maintained from nearby/overhead <br /> structures and power and communication lines. <br /> 4.1.2 Health and Safety <br /> • Hold Tailgate Safety Meetings in the manner and frequency stated in the health and safety plan. <br /> • All personnel at the site should have appropriate training and qualifications as per the health and <br /> safety plan. <br /> • All personnel within the exclusion zone should pay close attention to rig operations during well <br /> developmnet. Rotating or swinging components can snag or catch loose clothing or strike <br /> personnel and cause severe injury or death. <br /> 4.1.3 Rig Decontamination and Preparation <br /> Decontaminate all downhole equipment, sounders, bailers, pumps, and other materials used during well <br /> development. Procedures should follow SWE-FSOP-801 (Equipment Decontamination). <br /> [PFAS Project]: In general, all well development equipment will be washed with certified PFAS-free <br /> potable water and detergents such as Alconox, Liquinox or Citranox and should end with a triple <br /> rinsing with laboratory certified PFAS-free de-ionized water. If another source is used, a sample <br /> should be collected and tested for PFAS. If the concentrations are low enough to meet project Data <br /> Quality Objectives, the water is acceptable for use. <br /> Wherever possible, development equipment should also be rinsed immediately before use. <br /> 4.1.4 Calibrations <br /> Before mobilization, calibrate the safety-related sampling and monitoring equipment, water quality <br /> meters, and other measuring devices according to the instrument manufacturer's specifications. <br /> 4.1.5 Personal Protective Equipment (PPE) <br /> Provide workers with and don the appropriate PPE specified by the project work plans. <br /> 4.2 Mobilization and Setup <br /> The standard procedure for well development is described below. Project work plans may have additional <br /> specifications. <br /> Page 8 of 11 <br />