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40 C�] 40 40 Task 6.0 Production Pump Removal and Inspection The pump, motor, and associate column pipe shall be removed from each well and visually inspected. The pump will be sent offsite for additional inspection and maintenance by others. CDM will coordinate the pick up, service, and delivery of each pump and motor. The maintenance fee for servicing of each pump and motor is not included in this proposal. Task 7.0 Pre Treatment Video Survey The Contractor shall conduct an initial downhole color video survey to document existing casing and screen configurations and conditions prior to starting maintenance activities at each well. The camera shall have the capability of both downhole and 360 degree lateral view and shall be equipped with a light to illuminate the well bore. The video survey shall be recorded on VHS videotape format and four copies of the videotape shall be provided to the ;Engineer within five working days of completion of the survey. The video survey shall be used in the selection of the downhole tools to be used and the type of development. Task 8.0 Brushing, Swabbing, and Netting The Contractor shall conduct brushing, swabbing, and jetting of the well casing and screen or open hole (as equipped) at each well. The brush shall be of a spiral constniction for a full 360 -degree contact with the casing or screen and be equipped with a tight rubber swab 24 inches above the brush. The 24 -inch gap shall have four equal intake holes to allow brushing and reverse airlifting in combination without pushing debris back into the production zone. Airlifting shall be applied to remove debris. Jetting shall be performed using a 360 -degree tool attached to a submersible pump capable of operating at 450 gallons per minute at 300 psi at the screen or open hole. The jet tool shall be lowered using 3 -inch diameter tubing, allowing jetting to occur simultaneously (to loosen and clean the gravel or remove residuals from the open hole rock face) and airlift (remove debris and sediment or tighten gravel pack for sand control). During the jet/ airlift procedure, a valve placed on top of the tubing shall be opened intermittently to discharge debris from the well. Task 9.0 Disinfection The contractor shall inject stabilized sodium hypochlorite into the well during the last pass of the jet tool at each well. Concentration, volumes, and pH range shall be determined on a per -well basis. The chemicals shall have a contact time of no less than six hours and no more than 18 hours, The spent disinfection solution shall be properly disposed of offsite or neutralized prior to discharge. Task 9.1 Acidization (Optional) Prior to 'Task 9.0, should it be determined that a well might benefit from acidization, the Contractor may proceed with treatment after receiving written authorization from the Engineer. The written authorization must be received prior to the start of acidization activities. A well undergoing acidization shall be equipped with a sealed wellhead including a pressure gauge, blow -off valve, tank, and Braden head. Acid blends shall consist of hydrochloric, sulfamic, and citric acids plus Well-Klccn concentrate. Percentage of acids to be used shall not exceed 10 percent of the total volume. The acid tW 17