Attachment_B.pdf

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South Beaches WWTP Mechanical Integrity Testing Class I Deep Injection Well System 332113.56 - 1 Brevard County, FL Issued for Bid

SECTION 332113.56 – MECHANICAL INTEGRITY TESTING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes:

1. The work, materials, and equipment necessary to perform internal and external mechanical integrity testing of injection well.

2. Downhole packer required for the casing pressure tests and the procedure and materials for performing the pressure test.

3. Background geophysical logs to be performed prior to the Radioactive Tracer Survey

(RTS), the type of geophysical tool necessary to perform the RTS, and the procedures for performing the RTS.

B. Related Requirements:

1. Section 332113.23 “Geophysical and Video Logging” for Color Video Recording.

2. Mechanical Integrity Test Plan (Attached).

C. Preinstallation Conference: Conduct conference prior to mobilization and installation of testing equipment to Project site.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of packer, RTS tool, and associated test pumping, flow and pressure measurement, and storage equipment.

1. Include material descriptions, dimensions of individual components and profiles, and capacities if applicable.

2. Diagram of the RTS logging tool with description of gamma ray detectors.

3. Include rated capacities, operating characteristics, flow measurement limits, pressure measurement limits, and furnished specialties and accessories as applicable.

B. Qualifications Data: Submit qualifications for drilling superintendent supervising the project.

C. Pressure Gauge Certification: Calibration certificate 90 days prior to testing.

D. Iodine 131 Tracer Assay Date: Provide manufacturer’s certification of isotope assay date for radioactive tracer.

ATTACHMENT B

South Beaches WWTP Mechanical Integrity Testing Class I Deep Injection Well System 332113.56 - 2 Brevard County, FL Issued for Bid

E. Flow Measuring Device Certification: Calibrated and certified within 90 days with the certification letter provided to the Engineer.

F. Backflow prevention: If the water supply point to perform RTS is connected to the Owner’s potable system, install reduced pressure zone backflow preventer and associated piping and valves with a diagram of the configuration.

1.4 INFORMATIONAL SUBMITTALS

A. Qualifications Data: Florida Water Well Contractor license for drilling superintendent supervising the project.

B. License to handle radioactive material.

C. Site Radiation Survey: Submit at completion of RTS.

D. Packer assembly diagram with dimensions and associated tubing tally.

E. Deliverables: Submit 3 field copies of RTS within 3 hours of time when logging is complete.

Submit written field evaluation of their quality within 2 days of completion. Provide three copies of finished logs as soon as possible after logging. Provide electronic copies of logs in

ASCII raw data files in LAS format and PDF for each log on a USB drive or transmit electronically within 72 hours of cessation of logging activities at each well.

1.5 OPERATING REQUIREMENTS

A. Take all necessary steps to prevent any salty or brackish water produced at the wellhead during operations from being discharged to the ground and contaminating the shallow aquifer.

Accomplish all operations without any uncontrolled well-flowing conditions.

B. Perform any activities necessary to remediate a spill, should it occur, to the satisfaction of the

Owner, Engineer, and regulatory agencies.

C. Coordinate all Work with the plant superintendent.

D. Limit the period the injection well is out of service to no more than five calendar days.

E. Hours of all normal operations will be limited to 7 A.M. to 7 P.M., Monday through Friday, unless otherwise authorized by the Engineer.

F. Submit to the Engineer schedule and ongoing updates so that the Engineer may make the required 7-day notification to the Florida Department of Environmental Protection prior to any testing.

1.6 QUALITY CONTROL

A. Be responsible for quality control of all testing and logging. Accurately measure the depths of each tool used and provide representative measurements of downhole conditions as part of the

Class I Deep Injection Well System 332113.56 - 3 Brevard County, FL Issued for Bid

Work. Recalibrate any logging or testing equipment suspected by the Engineer of not accurately measuring downhole depths and/or conditions.

1.7 REMEDIAL WORK

A. If remedial work on the injection well becomes necessary because of accident, loss of tools, defective material, or for any cause related to the Work, propose a method of correcting the issue, in writing. Suggested methods shall be reviewed by the Engineer before work proceeds.

Be responsible for all remedial work necessary resulting from his/her activities.

PART 2 - PRODUCTS

2.1 PACKER EQUIPMENT

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Baker Single Set Production Injection Packer Model 300-01.

2. TAMJ Packer.

3. Or equal.

B. Diameter: Appropriate for size of well casing to be pressure tested.

C. Operation: Run on drill pipe or tubing to bottom of final casing depth.

D. Isolation: Seal tightly against casing walls to effectively isolate well casing from open hole below casing. Engineer will be the sole judge on effectiveness of packer element isolation of well casing.

2.2 PRESSURE TEST PUMPING EQUIPMENT

A. For the casing pressure tests, furnish and temporarily install pumping equipment of sufficient size and capacity to pressurize the 20-inch diameter casing in the injection well to 200 psi.

2.3 PRESSURE TEST SETUP

A. Furnish and install pressure pack-off device sufficient to seal the drill pipe and test wellhead prior to running of the casing pressure tests with no leaks.

B. Furnish a calibrated pressure gauge for the pressure test. Furnish pressure gauge calibration certificate demonstrating the gauge has been calibrated with the previous 90 calendar days prior to each use. Provide gauge supply with a calibrated range from zero to 200 PSI in one 1 pounds per square inch (psi) increments with an accuracy of plus or minus 0.5 percent.

Class I Deep Injection Well System 332113.56 - 4 Brevard County, FL Issued for Bid

2.4 RADIOACTIVE TRACER SURVEY LOGGING EQUIPMENT

A. Provide continuous recording geophysical logging equipment capable of running the following background logs to the bottom of each well:

1. Gamma ray.

2. Temperature and differential temperature.

3. Casing collar locator.

B. Provide continuous recording geophysical logging equipment capable of running the following logs associated with the RTS to the bottom of each well:

1. Gamma ray.

2. RTS.

3. Casing collar locator.

C. RTS Logging Tool: Configured with three gamma ray detectors positioned one above and two below the ejector port, and a casing collar locator device. Provide configuration diagram to

Engineer prior to its use.

D. Provide gamma ray detectors on the RTS tool that are of the scintillator type.

E. Provide RTS recording equipment capable of time driven recording with multiple settings for time interval adjustment. The presentation of the logs must be such that the response remains on scale.

F. Provide medicinal grade Iodine 131 radioactive isotope tracer for subsurface eject to perform the RTS. The tracer may be no older than 5 days from the manufacturer’s assay data. The RTS must be performed within 8 days (one half-life) of the “dispensed by” date shown on the assay for the Iodine I-131 used for the RTS.

G. Provide RTS logging equipment that is capable of printing log output in real time with the background gamma ray log superimposed.

2.5 RADIOACTIVE TRACER SURVEY PUMPING EQUIPMENT

A. If the water supply point of delivery does not yield the flow rate required for testing, furnish storage and pumping equipment for conducting the dynamic RTS for the planned durations and for flushing the casing. Water injection during the dynamic RTS will be at a velocity of a target rate of up to five feet per minute for the final casing diameter.

B. Furnish and temporarily install flow measuring device that is capable of accurately measuring the flow at each injection rate. Obtain Engineer approval on pumping equipment and flow measuring devices prior to use.

C. Calibrate and certify flow measuring devices and pressure gauges within 90 days prior to testing and send certification letter to the Engineer. Submit certificate of flowmeter calibration to the

Engineer prior to its use.

Class I Deep Injection Well System 332113.56 - 5 Brevard County, FL Issued for Bid

D. Furnish and temporarily install all valves, backflow prevention, and appurtenances necessary to adjust and control the injection rate into the injection well while testing. If the water supply point is connected to the Owner’s potable system, furnish and install reduced pressure zone backflow preventer at connection point prior to connecting.

PART 3 - EXECUTION

3.1 GENERAL REQUIREMENTS

A. Provide equipment in first class working order with the minimum capabilities necessary to do the described Work, acceptable to the Engineer. No unnecessary delays or work stoppages allowed because of equipment failure. Equipment failure will not be considered a valid reason to extend the length of the contract. In the event of negligence, faulty operation, or equipment failure damaging the well, be responsible for repair and/or remediation.

B. Provide only competent workmen for the execution of this work and all such work shall be performed under the direct supervision of an experienced well testing superintendent, who shall be available to the job, when requested.

C. Furnish and Install flow control devices and required piping on wellhead as required in preparation for logging.

3.2 MECHANICAL INTEGRITY TESTING SEQUENCE OF WORK

A. Required sequence:

1. Prepare well for video survey by pumping clear water into well (if required).

2. Perform color video survey.

3. Suppress surface artesian flow using weighted material (if required) and remove and store wellhead as directed by the Owner.

4. Perform casing pressure test.

5. Install wellhead and flush weighted material down the well.

6. Perform temperature log.

7. Perform RTS.

8. Restore well.

3.3 COLOR VIDEO SURVEY

A. Perform color video survey in accordance with the requirements of Section 331123.23

“Geophysical and Video Logging” in the injection well. Perform survey over the entire length of the well, both cased and open hole, to survey interior conditions of each well. Survey conditions of casing and open hole of injection well prior to RTS. st

3.4 PRESSURE TESTING

A. Packer Installation:

Class I Deep Injection Well System 332113.56 - 6 Brevard County, FL Issued for Bid

1. Pressure test packer assembly at the surface prior to insertion into the well.

2. Remove wellhead assembly as required to allow for installation of packer and tubing used to convey packer to test depth. If required, suppress artesian flow in well using weighted solution to prevent discharge of formation water at surface while installing packer.

3. Install packer in the well to a location near the bottom (between 10 and 30 feet) of the injection tubing or well casings as determined by the Engineer.

4. Inflate packer to a pressure such that the well casing is not damaged and an effective hydraulic seal is obtained. Consider the installation details of the injection well to prevent damage to the well.

5. Notify the Engineer of the anticipated start time of the final pressure test at least seven days in advance. Engineer will coordinate the testing schedule with the regulatory agency. No additional compensation will be provided for standby time waiting on regulatory agency staff if less than 7 days advanced notice is given or for any scheduled time not conforming to the requirements of this specification.

B. Pressure Test:

1. Install testing wellhead, contractor’s pressure gauge, transducer, and pumping equipment such that no surface leaks exist and such that pressure gauge can be monitored by the header geologist for a pressure test.

2. Completely fill well and all equipment lines with water and pressure well casing or tubing to the pressure approved by the Engineer. Pressure test casing or tubing for a minimum 60 minutes with no greater than plus or minus 5 percent pressure gain or loss.

If the test pressure cannot be maintained within these tolerances for 60 minutes, undertake corrective measures at Contractor’s expense until the test is set satisfactorily accomplished.

3. Conduct preliminary pressure tests in the presence of the Engineer prior to performing the final pressure test for the regulatory agency.

4. With regulatory agency onsite, perform formal pressure test for one hour duration and monitor wellhead pressure within in the casing or tubing.

5. Release pressure from well casing or tubing and accurately measure the volume of bleed off water used to pressure well.

C. Packer Removal:

1. Depressurize packer and remove testing wellhead.

2. Trip packer and tubing out of the well.

3. Install wellhead and restore well. It may be required to add additional weighted material control flow in the well prior to installing well head.

3.5 TEMPERATURE LOG

A. Prior to temperature logging, maintain no flow condition in well a minimum of 12 hours to allow for temperature stabilization within well.

B. Run a differential and gradient temperature log from land surface to bottom of injection zone, top to bottom.

Class I Deep Injection Well System 332113.56 - 7 Brevard County, FL Issued for Bid

3.6 RADIOACTIVE TRACER SURVEY (RTS)

A. General Requirements:

1. Calibrate geophysical tools within one week of testing.

2. Date tracer (Iodine 131) less than one half-life at time of use.

3. Recalibrate flow and pressure gauges within thirty days of use.

4. Have gamma detectors field calibrated by geophysical logging crew, after tool has been loaded with tracer and prior to insertion into well, if requested by Engineer. Provide film documentation of radioactive tracer injection time and calibrate tracer injection time to +

1 millisecond. Do not permit time lag between injection and monitoring.

B. Provide required notification to Engineer prior to initiating RTS. Engineer will coordinate testing schedule with Florida Department of Environmental Protection (FDEP).

C. Prior to proceeding with the RTS, perform a background Geiger counter survey of the site.

D. Install flow control prevention devices and required piping.

E. Run a background gamma ray log with casing collar locator (CCL) from top of injection casing to bottom of injection zone. Locate bottom of injection casing with CCL by repeat passes.

F. Load RTS tool with appropriate volume of radioactive tracer.

G. Dynamic Tests 1 and 2:

1. Position tool with ejector five feet above bottom of casing and establish a low-flow

(approximately 5 ft/min) rate of injection well after connecting to a water supply point to provide water for this low flow rate and install a calibrated flowmeter in a location with access for viewing by the Engineer.

2. Release a radioactive tracer slug (1 millicuries), keep detectors stationary, and monitor gamma ray detectors in time-drive mode for 60 minutes.

3. Raise tool to 200 feet above bottom of injection casing to record dispersion of radioactive tracer (Log Out of Position). If upward movement of tracer is detected during monitoring period, immediately log out of position to a new position approximately 20 feet above previous position and resume time drive monitoring.

4. Flush well with at least one casing volume and run gamma ray log of interval logged in previous step again (Log After Flush). If no tracer staining is detected in upward pass

(i.e., tracer has been flushed from casing), then casing volume flush may be omitted with approval of Engineer.

5. Run an additional low-flow dynamic test in a similar manner as described above – but only for 30 minutes, again with the release of 1 millicuries.

6. Lower tool to top of injection zone or to the depth of the lowest permeable zone selected by the Engineer and release remaining Iodine 131.

7. Conduct a final gamma ray logging pass (same interval as logged in background gamma ray log).

H. Assess testing results with regulatory representative and make determination of results acceptance prior to removing equipment.

I. Conduct additional dynamic tests if requested by the FDEP or by Engineer.

Class I Deep Injection Well System 332113.56 - 8 Brevard County, FL Issued for Bid

J. With acceptance, remove RTS tool and flow control devices from well and restore.

K. Perform final Geiger Counter survey of site.

3.7 WELLHEAD RESTORATION

A. Replace all nuts, bolts, and washers removed for the existing piping, valves, and appurtenances during disassembly related to the Work with new nuts, bolts, and washers.

B. Replace gaskets on all joints requiring disassembly related to Work that have existing gaskets.

Do not reuse existing gaskets for reassembly.

3.8 SITE RESTORATION

A. Repair any damage caused as part of the Work and restore site to condition prior to the initiation of the Work. This may include but is not limited to touch-up painting on piping, valves, and appurtenances disturbed during the Work, removal of temporary facilities, repairs of damaged irrigation systems, and resodding (with Argentine Bahia) and rolling disturbed grassed areas.

END OF SECTION 332113.56