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Home My WebLink AboutDERR-2024-012888IMPRESSED CURRENT CATHODIC PROTECTION SYSTEM EVALUATION DEQ Underground Storage Tank Program TESTING PER CRITERIA & STANDARDS ESTABLISHED BY NACE AND/OR STI (STEEL TANK INSTITUTE) • Access to the soil directly over the cathodically protected structure that is being evaluated must be provided. • A site drawing depicting the UST cathodic protection system and all reference electrode placements must be completed. I. UST OWNER II. UST FACILITY FACILITY NAME: HOLLADAY HILLS-BELL OIL FACILITY ID#: 7000068 FACILITYADDRESS: 500W 100S CITY: COALVILLE STATE: UT ZIP: 84017 COUNTY: SUMMIT FACILITY NAME: HOLLADAY HILLS-BELL OIL FACILITY ID#: 7000068 FACILITYADDRESS: 500W 100S CITY: COALVILLE STATE: UT ZIP: 84017 COUNTY: SUMMIT III. CP TESTER IV. CP TESTER’S QUALIFICATIONS TESTER’S NAME: PAYTON KELLY COMPANY NAME: M&M CATHODIC PROTECTION ADDRESS: 303 REDBERRY RD. CITY: DRAPER STATE: UT ZIP: 84020 PHONE: 801-750-3061 CP TESTERS CERTIFICATION NUMBER(s) & EXPIRATION DATE(s): STEEL TANK INSTITUTE CP INSPECTOR: #CP-16798 EXP:7-13-2026 UTAH: CP TESTER #UT418 EXPIRES 10-16-2025 WYOMING: CP TESTER #CP-2023-C-04 EXPIRES 7-13-2026 V. REASON SURVEY WAS CONDUCTED (mark only one) Routine - 3 year Routine – within 6 months of installation 90-day re-survey after fail Re-survey after repair/modification Date next cathodic protection survey must be conducted no later than: 11/19/2027 (required within 6 months of installation/repair & every 3 years thereafter). VI. CATHODIC PROTECTION TESTER’S EVALUATION (mark only one) PASS All protected structures at this facility pass the cathodic protection survey and it is judged that adequate cathodic protection has been provided to the UST system (indicate all criteria applicable by completion of Section VIII). FAIL One or more protected structures at this facility fail the cathodic protection survey and it is judged that adequate cathodic protection has not been provided to the UST system (complete Section IX). INCONCLUSIVE The cathodic protection survey of an impressed current system must be evaluated by a corrosion expert. (complete Section VII). CP TESTER’S SIGNATURE: DATE CP SURVEY PERFORMED: 11/19/2024 VII. CORROSION EXPERT’S EVALUATION (mark only one) The survey must be conducted and/or evaluated by a corrosion expert when: a) supplemental anodes or other changes in the construction of the impressed current system are made; b) stray current may be affecting buried metallic structures or c) an inconclusive result was indicated in Section VI. PASS All protected structures at this facility pass the cathodic protection survey and it is judged that adequate cathodic protection has been provided to the UST system (indicate all criteria applicable by completion of Section VIII). FAIL One or more protected structures at this facility fail the cathodic protection survey and it is judged that adequate cathodic protection has not been provided to the UST system (complete Section IX). CORROSION EXPERT’S NAME: COMPANY NAME: NACE INTERNATIONAL CERTIFICATION: NACE INTERNATIONAL CERTIFICATION NUMBER: CORROSION EXPERT'S SIGNATURE: DATE REVIEWED: VIII. CRITERIA APPLICABLE TO EVALUATION (mark all that apply) -850 OFF Structure-to-soil potential more negative than –850 mV with respect to a Cu/CuSO4 reference electrode with protective current temporarily interrupted (instant-off). 100mV POLARIZ. Structure(s) exhibit at least 100 mV of cathodic polarization (at least 100mV shift negative from depolarized state or recorded native) IX. ACTION REQUIRED AS A RESULT OF THIS EVALUATION (mark only one) NONE Cathodic protection is adequate. No further action is necessary at this time. Test again by no later than (see Section V). RETEST Cathodic protection may not be adequate. Retest during the next 90 days to determine if passing results can be achieved. REPAIR/RETEST Cathodic protection is not adequate. Repair/modification is necessary as soon as practical but within the next 90 days. X. DESCRIPTION OF UST SYSTEM TANK # PRODUCT CAPACITY TANK MATERIAL PIPING MATERIAL FLEX CONNECTORS 1 DSL 8,000 GAL STEEL (LINED) FRP ALL FLEXS IN CONTAIN. 2 UNL 8,000 GAL STEEL (LINED) FRP ALL FLEXS IN CONTAIN. 3 PREM 8,000 GAL STEEL (LINED) FRP ALL FLEXS IN CONTAIN. 4 5 6 7 XI. IMPRESSED CURRENT RECTIFIER DATA (complete all applicable) In order to conduct an effective evaluation of the cathodic protection system, a complete evaluation of rectifier operation is necessary. RECTIFIER MANUFACTURER: UNIVERSAL RATED DC OUTPUT: VOLTS:50 AMPS:8 RECTIFIER MODEL: GSAI RECTIFIER SERIAL NUMBER: 970373 RECTIFIER OUTPUT AS INITIALLY DESIGNED OR LASTLY RECOMMENDED (if available): VOLTS: AMPS: TAP SETTINGS DC OUTPUT EVENT DATE COURSE FINE VOLTS AMPS HOUR METER COMMENTS "AS FOUND" 11/19/2024 1 4 11.27 V 2.66 A 42145 13.3 mV (shunt) x .2 = 2.66 A "AS LEFT" 11/19/2024 1 4 11.27 V 2.66 A 42145 13.3 mV (shunt) x .2 = 2.66 A XII. IMPRESSED CURRENT POSITIVE & NEGATIVE CIRCUIT MEASUREMENTS (output amperage) Complete if the system is designed to allow such measurements (i.e. individual lead wires for each anode are installed and measurement shunts are present). CIRCUIT 1 2 3 4 5 6 7 8 9 10 TOTAL AMPS ANODE (+) TANK (-) XIII. DESCRIPTION OF CATHODIC PROTECTION SYSTEM REPAIRS AND/OR MODIFICATION Complete if any repairs or modifications to the cathodic protection system are made OR are necessary. Certain repairs/modifications are required to be designed and/or evaluated by a corrosion expert (completion of Section VII required). Additional anodes for an impressed current system (attach corrosion expert’s design). Repairs or replacement of rectifer (explain in “Remarks/Other” below). Anode header cables repaired and/or replaced(explain in “Remarks/Other” below). Impressed current protected tanks/piping not electrically continuous (explain in “Remarks/Other” below). REMARKS/OTHER: NO REPAIRS PERFOMED. SURVEY ONLY. XIV. UST FACILITY SITE DRAWING Attach detailed drawing of the UST and cathodic protection systems. Sufficient detail must be given in order to clearly indicate where the reference electrode was placed for each structure-to-soil potential that is recorded on the survey forms. Any pertinent data must also be included. At a minimum you should indicate the following: All tanks, piping and dispensers; All buildings and streets; All anodes and wires; Location of CP test stations; Each reference electrode placement must be indicated by a code (1,2,3 R-1, R-2, R-3etc.) corr esponding with the appropriate line number in Section XVI of this form. AN EVALUATION OF THE CATHODIC PROTECTION SYSTEM IS NOT COMPLETE WITHOUT AN ACCEPTABLE SITE DRAWING. (LARGER SITE DRAWING IS ATTACHED TO THIS SURVEY) XV. IMPRESSED CURRENT CATHODIC PROTECTION SYSTEM CONTINUITY SURVEY • This section may be utilized to conduct measurements of continuity on underground storage tank systems that are protected by cathodic protection systems. • When conducting a fixed cell - moving ground survey, the reference electrode must be placed in the soil at a remote location and left undisturbed. • Conduct point-to-point test between any two structures for which the fixed cell - moving ground survey is inconclusive or indicates possible isolation. • For impressed current systems, the protected structure must be continuous with all other protected structures in order to pass the continuity survey. NOTE: The survey is not complete unless all applicable parts of sections I-XIV are also completed DESCRIBE LOCATION OF “FIXED REMOTE” REFERENCE ELECTRODE PLACEMENT: POINT TO POINT CONTINUITY SURVEY WAS CONDUCTED STRUCTURE “A” 1 STRUCTURE “B” 2 STRUCTURE “A” 3 FIXED REMOTE INSTANT OFF VOLTAGE STRUCTURE “B” 4 FIXED REMOTE INSTANT OFF VOLTAGE POINT-TO-POINT 5 VOLTAGE DIFFERENCE (mV) ISOLATED/ 6 CONTINUOUS/ INCONCLUSIVE (example) PLUS TANK BOTTOM (example) PLUS PRODUCT LINE @ STP (example) -915 mV (example) -999 mV (example) ISOLATED (example) PLUS TANK BOTTOM (example) PLUS PRODUCT LINE @ STP (example) 22 mV (example) ISOLATED DSL FILL RISER DSL STP RISER 2.5 INCONCLUSIVE DSL FILL RISER DSL ATG RISER 45 ISOLATED DSL FILL RISER DSL TANK BOTTOM 347 ISOLATED UNL FILL RISER UNL STP RISER 102 ISOLATED UNL FILL RISER UNL ATG RISER 141 ISOLATED UNL FILL RISER UNL TANK BOTTOM 266 ISOLATED PREM FILL RISER PREM STP RISER 17.4 ISOLATED PREM FILL RISER PREM ATG RISER 12.2 ISOLATED PREM FILL RISER PREM TANK BOTTOM 269 ISOLATED RECT. NEG. PREM STP RISER 6.5 INCONCLUSIVE RECT. NEG. UNL STP RISER 60 ISOLATED RECT. NEG. DSL STP RISER .4 CONTINUOUS REMARKS/OTHER: POSSIBLE MINOR ISSUES WITH STRUCTURE WIRING CLAMPS ON STPS- ALTHOUGH CP POTENTIALS MEET OR EXCEED CRITERIA. 1. Describe the protected structure {“A”} that you are attempting to demonstrate is continuous (e.g. plus tank bottom). 2. Describe the “other” protected structure {“B”} that you are attempting to demonstrate is continuous (e.g. plus steel product line @ STP). 3. Record the fixed remote instant off structure-to-soil potential of the protected structure {“A”} in millivolts (e.g. –915 mV). 4. Record the fixed remote instant off structure-to-soil potential of the “other” protected structure {“B”} in millivolts (e.g. –908 mV). 5. Record the voltage difference observed between structure “A” and structure “B” when conducting “point-to-point” testing (e.g. 1mV). 6. Document whether the test (fixed cell and/or point to point) indicated the protected structure was isolated, continuous or inconclusive. XVI. IMPRESSED CURRENT CATHODIC PROTECTION SYSTEM SURVEY • This section may be utilized to conduct a survey of an impressed current cathodic protection system by obtaining structure-to-soil potential measurements. • The reference electrode must be placed in the soil directly above the structure that is being tested and as far away from any active anode as practical to obtain a valid structure-to-soil potential. • Both on and instant off potentials must be measured for each structure that is intended to be under cathodic protection. • The instant off potential must be -850 mV or more negative or the 100 mV polarization criterion must be satisfied in order to pass. NOTE: This survey is not complete unless all applicable parts of sections I – XIV are also completed LOCATION 1 CODE STRUCTURE 2 CONTACT POINT 3 REFERENCE CELL PLACEMENT 4 ON 5 VOLTAGE (mV) INSTANT 6 OFF VOLT. (mV) 100 mV POLARIZATION ENDING 7 VOLTAGE (mV) VOLTAGE 8 CHANGE (mV) PASS/ FAIL 9 (example) 1 (example) PLUS TANK (example) TANK BOTTOM (example) SOIL @ REG. TANK STP MANWAY (example) -1070mV (example) -875 mV (example) PASS (example) 2 (example) DIESEL PIPE (example) DISPENSER 7/8 (example) SOIL @ DIESEL TANK STP MANWAY (example) -810 mV (example) -680 mV (example) -575 mV (example) 105 mV (example) PASS 1 PREM TANK TANK STP BOREHOLE SOUTH -1406 -1164 - PASS 2 PREM TANK TANK STP BOREHOLE CENTER -1145 -1129 - PASS 3 PREM TANK TANK STP BOREHOLE NORTH -1675 -1123 - PASS 4 UNL TANK TANK STP BOREHOLE SOUTH -1381 -1098 - PASS 5 UNL TANK TANK STP BOREHOLE CENTER -1057 -1048 - PASS 6 UNL TANK TANK STP BOREHOLE NORTH -1652 -1171 - PASS 7 DSL TANK TANK STP BOREHOLE SOUTH -1676 -1058 - PASS 8 DSL TANK TANK STP BOREHOLE CENTER -1183 -1066 - PASS 9 DSL TANK TANK STP BOREHOLE NORTH -2153 -1104 - PASS 10 - - - 11 - - - 12 - - - 13 - - - 14 - - - 15 - - - 16 - - - 17 - - - 18 - - - 19 - - - 20 - - - 21 - - - 22 - - - 23 - - - 24 - - - 25 - - - 26 - - - 27 - - - 28 - - - 29 - - - 30 - - - 31 - - - 32 - - - 33 - - - 34 - - - 35 - - - 36 - - - 37 - - - 38 - - - REMARKS/OTHER: ALL POTENTIALS TAKEN OFF OF STP (AS PREVIOUS TESTERS HAVE DONE). ALTHOUGH I AM UNABLE TO PROVE STP'S ARE CONTINUOUS WITH THE TANKS THERE ARE INTERRUPTED POTENTIALS DURING THE SURVEY. AT THE TIME THE TANKS WERE LINED THERE WERE NO TEST LEADS INSTALLED ON THE TANK FOR FUTURE CATHODIC PROTECTION SURVEYS. WE STRONGLY RECOMMEND THE INSTALLATION OF TEST LEADS, AS PER STI RECOMMENDATIONS FOR TANKS WITH INTERNAL LINING. WE CAN PROVIDE A PROPOSAL UPON REQUEST TO ADDRESS THIS ISSUE. 1. Designate numerically or by code on the site drawing each local reference electrode placement (e.g. 1,2,3 T-1, T-2, P-1, P-2etc.). 2. Describe the structure that is being tested (e.g. plus tank; diesel piping; flex connector, etc.). 3. Describe where the structure being tested is contacted by the test lead (e.g. plus tank bottom; diesel piping @ dispenser 7/8; etc.). 4. Describe the exact location where the reference electrode is placed for each measurement (e.g. soil @ regular tank STP manway; soil @ dispenser 2, etc.) 5. {Applies to all tests} Record the structure-to-soil potential (voltage) observed with the current applied (e.g. –1070 mV). 6. {Applies to all tests} Record the structure to soil potential (voltage) observed when the current is interrupted (e.g. 680 mV). 7. {Applies to 100 mV polarization test only} Record the voltage observed at the end of the test period (e.g. 575 mV). 8. {Applies to 100 mV polarization test only} Subtract the final voltage from the instant off voltage (e.g. 680 mV – 575 mV = 105 mV). 9. Indicate if the tested structure passed or failed one of the two acceptable criteria (850 instant off or 100 mV polarization) based on your interpretation of data. ATTACHMENT 1 - LARGER SITE DRAWING: ATTACHMENT 2 - CERTIFICATION OF CP TESTER: ATTACHMENT 3 – REFERENCE ELECTRODE CALIBRATION TEST PERFORMED Copper-Copper Sulfate reference electrode field calibration test (half-cell) The following reference electrode calibration test is performed quarterly: Visual inspection: The field reference electrode should always have a quantity of undissolved copper sulfate crystals present in the solution to assure that the solution is saturated. The solution should be azure blue and clear since contaminants can make the solution cloudy. Parts required to perform field calibration test: QUANTITY DESCRIPTION 1 COPPER-COPPER SULFATE CuCu/SO 4 HALF CELL – CALIBRATION STANDARD – NOT USED IN FIELD 1 COPPER-COPPER SULFATE CuCu/SO 4 HALF CELL – TO BE CALIBRATED – FIELD REFERENCE ELECTRODE INSTRUCTIONS: 1. Place both the CALIBRATION STANDARD – NOT USED IN FIELD half-cell and the half cell to be calibrated into a container of distilled water. 2. Connect the half-cells to the leads of a voltmeter capable of giving reading in mill volts. 3. Turn on the voltmeter and see if the voltmeter reads a potential difference of (+/-) 10mV or more. 4. Wait up to five (5) minutes. 5. If half-cells show 10mV or more difference of potential, the half-cell being calibrated is out of calibration and should be replaced or cleaned and re-checked. ATTACHMENT 4 – FLUKE MULTIMETER CALIBRATION The following equipment shows the Fluke Multi-meters used for testing of CP potentials for these surveys: The 77, 87, 175, 177, & 179 Manufacturer’s Calibration Information provides the information necessary to adjust and verify the performance of the Fluke Models 175, 177, and 179 True RMS Multi-meters. WE PERFORM A PERFORMANCE TEST ON THESE DEVICES QUARTERLY (within the last 90 days): The performance tests verify the operation of the Meter when measuring low voltage DC potentials, such as those encountered during a CP survey. We check the accuracy of each Meter function against its specifications as referenced to a precision, stable, low-voltage supply reference that is accurate to within 0.007% (plus or minus 350uV) as measured by a calibrated 8.5 digit Keysight 3458A DMM that has an accuracy of 0.0008% (Keysight Technologies, Loveland Standards and Calibration Labs Certificate of Calibration 1-7581424013-1, (valid through January 21, 2024). If meter fails any part of the test per specifications of the manufacturer (+/- .09 volt @ 5 VDC ), calibration adjustment and/or repair is indicated it is sent to the manufacturer for repair and or calibration. WE PERFORM A CALIBRATION ON THESE DEVICES QUARTERLY (within the last 90 days): Calibration test of multi-meters was performed against its specifications as referenced to a precision, stable, low-voltage supply, as indicated above. Signature showing calibration test of multi-meters completed within the last 90 days: ____________________________ Signature ____________________________ Printed Name RRRRobert Butner, STI CP INspector/ NACE CP2obert Butner, STI CP INspector/ NACE CP2obert Butner, STI CP INspector/ NACE CP2obert Butner, STI CP INspector/ NACE CP2