ARCHIVED REPORTS_XR0004905 - Laserfiche WebLink

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. 13 15 2 Mechanical surging devices, such as 'plungers', bailers, and surge blocks shall be operatea in such a way as to prevent darnage to the well, and without producing excess sediment 13 15 3 The air or gas supply used m devetopment operations shall be free of hydrocarbons, avid other pollutants or contaminants A?i development and air jetting methods roust obtain prior approval from the Director 13 15 4 Water used in letting operations shat be free of pollutants and contaminants Water jetting development methods must obtain prior approval from the Director 13 15 5 All equipment used for developing, sampling, and/or repairing of wells roust be free of contarnmation and cleaned between the construction and/or sampling of wells to prevent cross contarnination 13 15 6 A minimum of 12 hours of time shall be allowed between placement of the annular seal and well development 13 15 7 Development and purge water, that is not peiiaitted for discharge to land or sanitary sewer, shall be containerized m properly secured and labeled DOT drums prior to disposal in accordance with all applicable federal, state, and local requirements 13.16. REHABILITATION AND REPAIR OF MONITORING WELLS 13 16 1 Rehabilitation methods should be compatible with the use of the monitoring well Well rehabilitation methods which include surging by use of compressed air, backwashing or surging by alternately starting or stopping a pump, water jetting, sonic cleaning, or combinations of these, must obtain prior approval from the Director 13 162 Materials used for repairing well casing shall meet the requirements of Section 13.8 13.17. REQ FOR DESTROYING MONITORING WELDS AND EXPLORATION HOLES 13 17 1 A monitoring well shall be investigatfA to determine its condition and details or its construction prior to its destruction a 13 172 The well shall be sounded immediately before it is destroyed to determine whether there are obstructions that will interfere with filling and sealing 13 17 3 Any obstructions found in the well or boring shall be removed before filling and sealing operations begun - 13 17 4 If the well was constructed and mairitairied m accordance with these Standards, the sealing material shall be placed under pressure to ensure that the monitonng well is properly filled and sealed 13 17 5 Casing material may require perforation, or puncturing, to allow for proper placement of sealing materials 13 17 6 If the well constriction is unknown and/or is located in an area of known or suspected pollution or contarniivation, the well shall be destroyed by removing all .material within,the vaginal borehole'includung the well casing, screen, filter pack, acid mnular seal), and the created hole filled completely with appropriate seaLing material 13 17 7 Exploratory borings, installed for sampling purposes, shall be completely grouted with appropriate sealing material The too 3 feet of the bonng may be backfilled with clean, uncontaminated fill material 21