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HomeMy WebLinkAboutFAIRFAX SHELL 91 ANNULAR 11-13-2023 Appendix VII Underground Storage Tank Secondary Containment Testing Report Form TYPE OF ACTION Installation Repair 6 Month 36 Month 1. FACILITY INFORMATION CERS ID Test Date Facility Name Facility Address City ZIP Code 2. SERVICE TECHNICIAN INFORMATION Company Performing the Test Phone Mailing Address Service Technician Performing Test Contractor/Tank Tester License Number ICC Number ICC Expiration Date 3. TRAINING AND CERTIFICATIONS Manufacturer and Test Equipment Training Certifications Expiration Date 4. TEST PROCEDURE INFORMATION Test Procedures Used Components Tested 5. CERTIFICATION BY SERVICE TECHNICIAN CONDUCTING TEST I hereby certify that the secondary containment was tested in accordance with California Code of Regulations, title 23, division 3, chapter 16, section 2637; that required supporting documentation is attached; and all information contained herein is accurate. I understand that test procedures shall be made available upon request by the governing authority. Service Technician Signature Date Total # of Pages L.A.N. Testing Rev. 11/2/20 CERS = California Environmental Reporting System, ICC = International Code Council, ID = Identification, NA = Not Applicable, UDC = Under-Dispenser Containment, Page 1 of 3 Underground Storage Tank Secondary Containment Testing Report Form 6. TANK SECONDARY CONTAINMENT TEST Test Method Developed by ☐ Manufacturer ☐ Industry Standard ☐ Professional Engineer Test Type ☐ Pressure ☐ Vacuum ☐ Hydrostatic Test Equipment Used: Tank ID Tank Manufacturer Tank Capacity Test Start Time Initial Reading Test End Time Final Reading Change in Reading Pass/Fail Criteria Tightness Test Results ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail 7. PIPE SECONDARY CONTAINMENT TEST Test Method Developed by ☐ Manufacturer ☐ Industry Standard ☐ Professional Engineer Test Type ☐ Pressure ☐ Vacuum ☐ Hydrostatic Test Equipment Used: Pipe Run ID Pipe Manufacturer Test Start Time Initial Reading Test End Time Final Reading Change in Reading Pass/Fail Criteria Tightness Test Results ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail Pipe Run ID Pipe Manufacturer Test Start Time Initial Reading Test End Time Final Reading Change in Reading Pass/Fail Criteria Tightness Test Results ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail ☐ Pass ☐ Fail Additional copies of this page may be attached. L.A.N. Testing Rev. 11/2/20 All tests marked “Fail” and any repairs made before or during the tightness test must be described in the COMMENTS section. Page 2 of 3 Underground Storage Tank Secondary Containment Testing Report Form L.A.N. Testing Rev. 11/2/20 8. COMMENTS All tests marked “Fail” and any repairs made before or during the tightness test must be described in the COMMENTS section. Page 3 of 3 __________________________________________________________________ 4. TANK SECONDARY CONTAINMENT INTEGRITY TESTING 4.1 General. Double –walled tanks have interstitial space that can be tested for integrity. There are two methods of testing the integrity of tank secondary containment systems – dry and wet. Dry test methods use a partial vacuum to determine the integrity of the containment. To perform a wet test on an existing liquid-filled tank interstitial space, the liquid level in the interstitial space is raised and is monitored for a specified period of time to determine if the containment has integrity. A tank secondary containment integrity test does not necessarily determine whether the primary tank is tight because portions of the primary tank, such as tank fittings and manway openings, may not be included in the containment integrity test. Figure 4.2 Tank Secondary Containment Integrity Testing – Dry Test Method 4.2.1 Purpose. This method is used to test the integrity of the dry secondary containment of the UST. 4.2.2 Description of Test. A partial vacuum is drawn on the interstitial space and it is monitored for a specified period of time. If the vacuum level is maintained, the containment system has passed the test. The vacuum test time depends on the volume of the annular space and site conditions. 4.2.3 Test Conditions. The primary tank may contain any level of product. No bulk deliveries shall occur during the test. ____________________________________________________________________________ Caution: Use only air operated vacuum source or a vacuum pump powered by an explosion-proof motor. Vacuum pumps with electric motors that are not explosion-proof may ignite flammable vapors. If a portable air compressor is used, it should be located at least 20 feet away from the venturi-eductor or outside any Class 1, Division 1 area. ____________________________________________________________________________ 4.2.4 Preparation. The procedures in this section are general in nature and reflect the suggested vacuum levels and hold times for testing tank secondary containment areas. Consult tank manufacturer and authority having jurisdiction (AHJ) guidelines before performing these tests as their requirements may differ. Determine if there is liquid present in the interstitial space. If liquid is found, determine if the liquid is water or product, and remove it to the extent practicable. The hydrostatic pressure from a high water table imposes inward pressure on the outer wall of a UST. Applying a vacuum to the interstitial space of the tank creates additional pressure on the outer wall. The combined forces can damage the secondary tank wall when there is a large defined space between the primary and secondary tanks. Consequently, to prevent damage to the tank, it is important to observe the water table and associated recommended vacuum levels when testing. Vent the primary tank to atmosphere during the test. In some installations, the tank interstitial space may be vented to minimize the buildup of condensation. In these cases, seal off any vent lines to the tank interstitial space prior to testing. Determine the volume of the tank. This information is available from facility records or the automatic tank gauge (ATG) readout. 4.2.5 Steel Tanks. Determine if the interstitial space is a “tight wrap” design for a “110% containment” design. Tanks with a 100% containment design should us the latest version of Steel Tanks Institute’s (STI) Recommended Practice R012, Recommended Practice for Interstitial Tightness Testing of Existing Underground Double Wall Steel Tanks for Testing. For tight wrap tanks, use the test method in this section. 4.2.6 Fiberglass Tanks. Determine if the interstitial space is a “tight wrap” design for a “100% containment” design. Either type of fiberglass tank may use this test, or the latest version of Fiberglass Tank & Pipe Institute’s, Field Test Protocol for Testing the Annular Space of Installed Underground Fiberglass Double Wall and Triple-wall Tank with Dry Annular Space. FT&PI 4/01/07. 4.2.7 Test Equipment Test equipment shall include:  a vacuum-generating device that can be used in a Class 1, Division 1 area capable of pulling 15 inches of mercury (Hg) vacuum;  an automatic vacuum shutoff valve or vacuum regulator (The shutoff can be set to close at a predetermined safe level, preventing the possibility of accidentally imposing a high vacuum that could damage the tank. The use of the valve is recommended because it limits the vacuum that can be applied to the interstitial space.);  vacuum gauge with a range of 0 inches to 30in Hg graduated in increments of 0.5 inches Hg or less.  toggle valve and vacuum hoses; plumber’s plug.  stopwatch or other time measurement device capable of measuring a 1-second increment; 4.2.8 Test Procedure 1. Install the plumber’s plug in the interstitial riser(s) below any tees. 2. Connect the vacuum gauge, valve and the vacuum-generating device to the fitting on the plumber’s plug. The valve should be between the vacuum source inlet and the pressure gauge. The gauge should be between the valve and the fitting so it will read the interstitial vacuum shutoff valve is located at the inlet of the vacuum-producing device and should be set at a minimum 10 percent and no more than 2 inches Hg above the test vacuum. 3. Ensure all connections are airtight. 4. Start the vacuum-generating device, and open the valve. 5. Pull the vacuum to 10 inches Hg for Fiberglass tanks and 6 inches for Steel tanks. Close the valve. 6. Allow the vacuum to stabilize for a minimum of 5 minutes at the specified vacuum level. If the stable vacuum cannot be maintained, test equipment shall be inspected for leakage. Repeat steps 4 and 5 until a stable vacuum is achieved. If a stable vacuum cannot be maintained, the tank secondary containment integrity test fails. 7. When the vacuum level stabilizes, record the vacuum level and the test start time. 8. Observe the vacuum level for the period of time shown in Table 4-1. 9. Record the final time and vacuum level. 10. Check the interstitial space for accumulation of liquids. 4.2.9 Pass/Fail Criteria. If there is no loss in vacuum level, no liquids are drawn into the interstitial space during the test duration shown in Table 4.1, and the tank secondary containment area has no additional fluid than at that start of the test, then the tank secondary containment passes the test. __________________________________________________________________ 5. PIPING SECONDARY CONTAINMENT INTEGRITY TESTING 5.1 General Underground product piping is available with single wall and double walls. Double-walled piping provides containment for leaks from primary containment and must be leak-free to prevent release of product into the environment. 5.2 Purpose This method is used to test the integrity of piping interstitial space(s). 5.3 Description of Test. The interstitial space is sealed at the ends and is pressurized with an inert gas. The pressure is monitored for 1 hour. If any pressure drop occurs, the secondary containment fails the test. 5.4 Test Conditions The primary pipe may contain fuel, and dispensing activities may continue during the test without affecting the test results. 5.5 Preparation If the interstitial space contains product, ensure that the interstice is open to the atmosphere and perform a precision test on the primary piping before conducting a test on the secondary containment piping. Termination fittings must be sealed at all piping terminations, and test fittings must be accessible to perform the test. Check with the piping manufacture regarding testing procedures and the proper pressure before testing requirements stated in this recommended practice are general statements and may vary. Recommended pressure levels and test durations are addressed in Section 5.7. Piping manufactures’ test procedures may differ. This test can be conducted in sections or as one continuous pipe depending on the installation. Care should be taken to ensure that the entire secondary containment of the piping system is tested. 5.6 Test Equipment Test equipment shall include:  inert gas source (nitrogen, helium, etc.);  stopwatch or other time-measurement device capable of measuring a 1-second increment;  test tubing assemblies (Turbine assemblies provide access to the beginning and end of the interstitial space.);  pressure gauge with a 15 psig maximum pressure reading with 0.5 increments. 5.7 Test Procedure. 1. If necessary, re-install termination (test) boots at piping terminations. 2. If necessary, connect the tubing assemblies to the secondary containment termination fitting on each end of the section of piping to be tested. 3. Connect the inert gas source and pressure gauge. 4. Gradually pressurize the interstitial space to 5 psig. Close the valve and allow the pressure to stabilize. Repressurize to the specified test pressure if necessary. 5. Observe the pressure for a period of 1 hour. 6. If the piping pressure after 1 hour is less than the test pressure, check termination fittings and test assemblies for leaks. 7. Release the pressure on the system slowly. 8. Remove the test equipment. 9. Restore the piping to its normal operating condition. 5.8 Pass/Fail Criteria. If no pressure change occurs during the test period, the piping fails the secondary containment integrity test. If there is an increase in pressure over the test period, repeat the test. If there is any drop in pressure over the test period, the piping fails the secondary containment integrity test. If there is any increase in pressure over the test period, repeat the test. __________________________________________________________________ 6.5 CONTAINMENT SUMP INTEGRITY TESTING ____________________________________________________________________________ CAUTION: Gaining access to the containment sump requires removing the lid, cover or dispenser panel that is in place to protect the equipment in the sump. These components can be heavy. They may require special handling and more than one person to remove them. Use caution when moving and replacing them when testing is complete. During the test, put the covers and panels in a safe location where they are secure and isolated from vehicle and customer traffic. ____________________________________________________________________________ 6.5.1 General Containment sumps are liquid-tight structures designed to temporarily contain leaks or spills. In addition, Containment sumps often serve as the leak detection monitoring location for double-walled piping systems. Leakage from the primary containment typically flow by gravity inside the secondary containment to the sump, where it can be easily observed or detected by a sensor. This section describes a hydrostatic test method. There are vacuum test methods available for containment sumps. Consult the manufacture before performing a vacuum test. ____________________________________________________________________________ Note: Follow the manufacturer’s instructions when testing the interstitial spaces of double walled containment sumps. ____________________________________________________________________________ 6.5.2 Purpose. This section describes the preparation and procedures to test the integrity of containment sumps to ensure that they do not leak. 6.5.3 Description of Test. The containment sump is filled to the proper level with water. The water level is measured at the beginning and at the end of test. 6.5.4 Test Equipment. Test equipment shall include:  water;  measuring stick that is accurate to within1/16 (0.063) inch and of sufficient length;  stopwatch or other time-measurement device capable of measuring a 1-second increment 6.5.5 Preparation. 1. Care should be taken when conducting the test in the rain or during freezing weather conditions. 2. Remove and properly dispose of any liquid and debris (leaves, sediment and trash) in the containment sump. 3. Inspect the containment sump for damage. Examine all preparation fittings, conduits, junction boxes, caps and risers (if present), and side-wall seams for defects, damage or improperly installed components (e.g., loose penetration fitting clamps or missing interstitial space caps), correct these items before performing the integrity test. If there are items that must be repaired (e.g., deteriorated penetration fitting boots), notify the owner/operator and obtain approval prior to proceeding with repairs. 4. Test boots or secondary containment termination fittings must be present on the piping penetrating the sump. During testing, these fittings prevent water from entering the interstitial space of double-walled piping. Without these fittings, the integrity of the sump cannot be tested using this method. 5. If interstitial monitoring sensors are present within the containment sumps, temporarily remove them before conducting the test. If the sensor is removed, reposition after testing to appropriate position according to the manufacturer’s instructions. 6. If the containment sump is found to have cracks, loose parts or separation of any joints or penetration fittings, it is not considered to be liquid-tight. This visually indicates a test failure. ____________________________________________________________________________ Caution: Water can damage electrical connections. Ensure that there are no components that can be damaged by the addition of water to the sump. If such components are present, take appropriate precautions when performing the test or use an alternative test method. _____________________________________________________________________________________ 6.5.6 Test Procedure  Begin the test by adding water to the sump to a minimum of 4 inches above the highest sump penetration or sump sidewall seam, whichever is higher. To compensate for sump deflection, the water must be allowed to settle a minimum of 15 minutes before taking the initial test measurement. If the highest sump penetration or sump sidewall seam is less than 4 inches from the top of the sump, add water to within 1 inch of the top of the sump.  Place the measuring stick vertically at the lowest point in the sump and extending above the water level in the sump to allow for an accurate measurement to be taken. The location of the measuring stick must remain the same for each water level measurement. Document the initial water level measurement as measured from the bottom of the sump. Alternative measurement methods may be used provided that the measurement to 1/16 (0.063) inch can be made.  Take all precautions to prevent the water level from being disturbed during the duration of the test.  After 1 hour, document the ending water level measurement.  Upon completion of the test:  remove all water and properly dispose of it according to Section 6.7;  reinstall any interstitial monitoring sensors in their proper positions;  return the test boots or secondary containment fittings to their pre-test operating configurations;  inspect and reinstall all containment sump lids, gasket and covers. 6.5.7 Pass/Fail Criteria. If the water level changes less than 1/8 (0.125) inch, the containment sump passes the integrity test. If the water level changes 1/8 (0.125) inch or greater, the containment sump fails the integrity tests. 6.6 Accelerated Precision Hydrostatic Test for Spill Buckets and Containment Sumps. Electronic precision test equipment can be utilized to test spill buckets and containment sumps. It incorporates more sensitive equipment that permits a test to be conducted in a shorter period of time. The procedures use the same test fluid and test the same volume as other methods outlined in this chapter. The manufacturer of the measurement equipment should specify the precision and duration of the test and the pass/fail criteria. However pass/fail criteria should not be less stringent than those prescribed for the 1-hour test in Section 6.5.7. The data sheet for Sections 6.2 or 6.5 may be used for this test. Refer to Appendix D. 6.7 Proper Disposal of Test Liquids. Test liquids must be disposed of properly. Check with the AHJ regarding requirements for proper disposal.