attachment_1_bid_3005_25.pdf

Attachment 1: Scope of Services RFB 3005-25 Well Repair, Maintenance, and Installation Services

Bidder Initials: ______

Date: ___________

1. THE VENDOR SHALL PROVIDE ALL LABOR, MATERIALS, CHEMICALS, EQUIPMENT,

AND NECESSARY PERMITS TO PERFORM THE FOLLOWING SERVICES AT A MINIMUM:

1.1. Well Cleaning and Reconditioning

1.2. Well and Pumping Equipment Inspection and Repair

1.3. Pump Rental

1.4. New Well Installations

1.5. Well Function Analysis / Testing

2. WELL CLEANING AND RECONDITIONING:

2.1. Satisfactorily clean and recondition all wells following the AquaFreed® process or State approved equivalent process. Cleaning by a hydrochloric acid treatment method is not an acceptable approved equal. This will include a hoist/crane rig capable of pulling the motor and pumping equipment. The development rig MUST include a hydraulically operated surging piston with variable stroke length between 1 and 6-feet to provide a reciprocating surging action in the well automatically. Use of a cable tool rig is NOT permitted. The equipment shall also be capable of a stroke frequency up to 30 strokes per minute. The work will be performed by the Vendor’s personnel with equipment owned by the Vendor and shall not be subcontracted. The Vendor shall also determine the specific capacity of the well before and after reconditioning and provide a report.

2.2. The Vendor shall apply for, pay all fees, and obtain all permits necessary to complete the work, lawfully. The Vendor shall comply with all provisions of permits, including coordination and inspections of work by the appropriate approving authorities such as, but not limited to the NH Department of Environmental Services.

2.3. Material and shop drawings shall be submitted to the Chief of Inland Fisheries for approval.

2.4. Complete final cleanup of the site and facility to the complete satisfaction of the Owner. The work shall include the cost of legal disposal of all excess or waste materials generated from this project in a manner which is consistent with any local, state and federal rules and regulations for disposal of such materials.

2.5. Furnish all pump test results and other information related to work done on the well, pumps and motors, pump information, warranties and contract closeout material prior to making the final payment request.

2.6. Additional treatment of the well with Sodium Hypochlorite to clean well screens, if necessary.

3. WELL AND PUMPING EQUIPMENT INSPECTION AND REPAIR:

3.1. Preliminary Testing: Prior to pulling the pumping equipment, the VENDOR shall conduct a test of the well and pumping equipment by isolating the well from the system, connecting a temporary discharge line and orifice pipe to the station blow off line or yard hydrant, and operating the existing pump at a minimum of four (4) different flow rates to establish a baseline for the evaluation of the effectiveness of the cleaning effort. Vibration, voltage and amperage readings are also to be collected and recorded during the pre-cleaning testing procedures.

3.2. Removal and Inspection of Pump and Motor: The Vendor shall remove the pump and motor from the well, taking all due precaution to avoid damaging the well house, well casings, seals, discharge piping or pumping equipment. Once removed, the pumping equipment, column pipe, and discharge head shall be disassembled, cleaned by high pressure washing and inspected by the Vendor’s qualified personnel. A written Pump Inspection Report detailing the condition of the equipment will be prepared and submitted, along with a complete list of recommended repair parts, including pricing, to the Hatchery Superintendent for review. They will then send to the Inland Fisheries Division Chief for approval. No repairs shall be made without prior written authorization from the Division Chief.

3.3. Well Redevelopment: The Vendor shall redevelop each well for up to 32-hours by a combination of individual chemical treatments, mechanical surging, high volume backwashing and pumping. The development equipment to be used MUST include a minimum of three (3) full diameter blocks (two in the screen and one in the casing), an end-suction turbine pump, a calibrated orifice for the measurement of the flow rate and a minimum 1,500-gallon temporary holding tank to be used for the storage and neutralization of the redevelopment chemicals.

3.4. The wells will be redeveloped and chemically treated as follows:

3.4.1. 1st Treatment – Once the pumping equipment has been removed the Vendor shall pre-treat the well by jetting the interior of the screen with a high-pressure stream of water to remove soft materials and break apart hardened mineral deposits from the screen surface. The jetting tool is to be set within the well along with either a submersible or centrifugal pump. Once set, the jetting tool will be raised and lowered through the well screen covering the entire length of screen on each pass. Throughout the jetting process, the submersible/centrifugal pump will be used to pump debris loosened out of the well. Wastewater pumped from the well will be directed to a temporary holding tank where the solids will we allowed to settle out prior to discharge of the water on-site at a location acceptable to the owner.

3.4.2. 2nd Treatment - Upon removal of the jetting equipment, the surge-block development tools will be set, and prior to the placement of any chemicals, the well will be surged for a period of one (1) hour and then pumped to waste to remove any loose debris from the interior of the screen & casing. Place in the well screen a solution consisting of 20-degree baume Muriatic Acid and NuWell 310 Bio-Acid Enhancer. A sufficient amount of acid shall be placed in the well to provide an acid concentration in the entire screen and gravel pack of 15%. The NuWell 310 shall be added at a rate of 2.5 gallons per 55 gallons of Acid. Once the solution has been placed in the well it shall be forced into the formation by the addition of 1,500 gallons of potable water. The acid/NW310 solution shall then be surged, pumped and backwashed for a minimum of 4 hours. The high-volume backwash effort shall include the recirculation of unspent acid/NW310 solution into the well through the developing tools. Each backwash event should include a quantity of not less than 1,000 gallons of the chemical solution being forced back into the screened section of the well. Once the treatment is complete, the well will be pumped to waste while surging, into the temporary settling tank provided by the Vendor. After settlement, the acid solution will be neutralized to a pH of at least 6.0 by the addition of Soda Ash, and then discharged to waste on-site at the location designated by the owner. A detailed record of the neutralization data shall be maintained and submitted with the final report. In calculating the amount of chemicals to be required, the screen length plus 5' shall be considered as a base. The gravel pack shall be considered to have a porosity of 50% and allowance should be made to fill both the screen and the gravel pack with chemicals.

3.4.3. 3rd Treatment – Once the Acid solution has been pumped from the well, the Vendor shall treat the well using a wetting agent to remove formation fines, silts and clays. Place 1 gallon of Nu Well 220 (Johnson Screen) per 1,000 gallons of well volume. Once the solution has been placed in the well it shall be forced into the formation by the addition of 500 gallons of water. The well shall be surged, pumped and backwashed (as described above) for a minimum of 4 hours, the solution pumped from the well, neutralized as needed, and discharged to waste on-site.

3.4.4. 4th Treatment – Once the Wetting Agent solution has been pumped from the well, the Vendor shall place in the well sufficient Sodium Hypochlorite solution to provide a minimum concentration of 200 ppm. The total volume of the chlorine solution shall be 3 times the volume of the water in the screen and gravel pack.

Immediately following the injection of the chlorine, the well will be surged without pumping to distribute the solution through both the screen and gravel pack. Following this surging effort, the solution is to be forced into the formation by the addition of 1,500 gallons of water. Whenever possible the solution shall remain in the well overnight and be surged, pumped and backwashed (as described above) for a minimum of 4 hours before pumping to waste. Following treatment, the chlorine solution will be pumped into a temporary settling tank provided by the Vendor. The Sodium Hypochlorite solution will be neutralized in the Vendor’s temporary holding tank with Sodium Bisulfite until a chlorine residual of < 5ppm is achieved.

The neutralized solution will then be discharged to waste on-site at the location designated by the owner. A detailed record of the neutralization data shall be maintained and submitted with the final report.

3.4.5. Additional Treatments - At the completion of each chemical treatment, a brief 30-minute pumping test shall be conducted to provide an estimate of the development results. The test MUST be completed using the end suction turbine pump and calibrated orifice pipe. No other methods of pumping or flow measurement will be permitted. Upon completion of each treatment, an analysis of the development results shall be made with the owner. The decision of whether to provide additional chemical treatments will be made at that time.

3.4.6. Pumping to Clear Well Treatment Chemicals – The final 6-hours of machine time is to be spent surging and pumping the well to waste to ensure that all treatment chemicals have been removed from the well and surrounding aquifer prior to the well being returned to service.

3.5. REASSEMBLY AND REINSTALLATION: The Vendor shall reassemble and install the reconditioned pumping unit in the well, being careful to maintain proper alignment with the existing pump foundation and discharge piping.

3.6. FINAL TEST OF WELL AND EQUIPMENT: Following the installation of the pump in the well, the Vendor shall conduct a 2-hour pumping test of the well and its equipment, comparing the results of this test with the capacity of the well prior to its reconditioning. Voltage and amperage measurements shall be taken and recorded, together with pump discharge pressure, static and pumping water levels and capacities at four (4) operating points of the pump.

3.7. REPORT: Upon completion of all work, a letter report detailing the work completed. Information to be included in the report includes the following:

3.7.1. Complete details of the results of the daily testing throughout the redevelopment process, redevelopment chemicals including quantities used and a detail of any repair parts furnished.

3.7.2. A separate report detailing the post-cleaning flow test on the well and pumping equipment showing all pertinent well, pump and motor information as well as all field test data collected, and a plot of the current pump performance shall be made.

3.8. SALVAGE: All pump parts and equipment removed from the existing work and not required to be reinstalled in the new work shall remain the property of the owner.

4. PUMP RENTAL:

4.1. Shall provide a pump of equal or greater capacity to what is being used on-site.

4.2. Short term rentals shall be billed at a daily rate and long-term rentals (more than one week) shall be billed at a weekly rate.

5. NEW WELL INSTALLATIONS:

5.1. Shall include but not limited to the following:

5.1.1. Engineering plans / drawings as needed

5.1.2. Developing the scope of work

5.1.3. Drilling and any site work

5.1.4. Installation of equipment / materials

5.1.5. Reusing or replacement of existing equipment still in good working order

5.1.6. Operational testing

5.1.7. Permitting in cooperation with the NH Fish & Game Department and the NH Department of Environmental

Services

6. WATER FLOW TESTING:

6.1. Conduct a flow test in order to estimate the current capacity of the well to determine if any repairs or replacements to equipment need to be made. Provide a report to the state site representative.

7. SITE SAFETY REQUIREMENTS:

7.1. Vendor’s field employees must all have current state safety training requirements to be permitted on site. Visit https://www.dol.nh.gov/inspections/safety for additional information.

7.2. Due to the use of heavy equipment, the use of hazardous chemicals, the presence of potential overhead and electrical hazards, the Vendor’s field crew must consist of a 2-person crew for all on-site activities including accessing the pump station, removal & reinstallation of the permanent pumping equipment, installation & removal of the developing tools, all chemical handling including surface preparation, injection, pumping and neutralization, and all mechanical surging and pumping activities.

https://www.dol.nh.gov/inspections/safety