2009 Annual Survey Report and Appendices-Phase I[1]

5349.02 City of Hayward (Proj 623-7041) 2009 Annual Survey Report (Final)

FINAL REPORT ANNUAL CATHODIC PROTECTION SYSTEM SURVEY

2009

PROJECT 623-7041 CITY OF HAYWARD

RESERVOIRS, PIPELINES, AND BART LINE CURRENT MONITORING STATIONS

HAYWARD, CA

PREPARED FOR:

CITY OF HAYWARD 777 B STREET

HAYWARD, CA 94541-5007

PREPARED BY:

CORRPRO 2799 MILLER STREET

SAN LEANDRO, CA 94577 (510) 614-8800

September 2009 5349.02 City of Hayward (Proj 623-7041) 2009 Annual Survey Report (Final)

5349.02 City of Hayward (Proj 623-7041) 2009 Annual Survey Report (Final)

TABLE OF CONTENTS

SUMMARY ................................................................................................................................... 1

SYSTEM DESCRIPTIONS ......................................................................................................... 3

TEST PROCEDURES.................................................................................................................. 6

CRITERIA..................................................................................................................................... 8

RESULTS AND CONCLUSIONS .............................................................................................. 9

RECOMMENDATIONS............................................................................................................ 13 APPENDICES Appendix 1 – Reservoir Data – Rectifier, Anode bed, and Potential Data Appendix 2 – Pipelines – Rectifier and Groundbed Data Appendix 3 – Pipelines – Potential Survey Data Appendix 4 – West Winton Pipeline – Soil Resistivity and Chemical Analysis Data Appendix 5 – Mission Pipeline – Soil Resistivity and Chemical Analysis Data Appendix 6 – GPS Data Appendix 7 – Photographs Appendix 8 – Criterion – NACE Standard SP0388-2007 Appendix 9 – Criterion – NACE Standard RP0196-2004 Appendix 10 – Criterion – NACE Standard SP0169-2007

5349.02 City of Hayward (Proj 623-7041) 2009 Annual Survey Report (Final) Page 1

SUMMARY During the months of February through July 2009, Corrpro conducted the annual cathodic protection system (CPS) survey on the reservoirs, pipelines, and BART line current monitoring stations for the City of Hayward. The structures inspected during the survey were:

750 Highland Reservoir 1000 Highland Reservoir 1285 Highland Reservoir 1530 Highland East Reservoir Garin Hill Reservoir South Walpert Reservoir Hesperian Aqueduct North (33-inch) Hesperian Aqueduct South (43-inch) Industrial Pipeline Valle Vista Pipeline 42-inch Wastewater Treatment Plant Pipeline West Winton 30-inch Aqueduct 2,000-foot ductile-iron pipeline (DIP) section of West Winton 30-inch Aqueduct Mission Boulevard 24-inch Aqueduct BART Line Current Monitoring Stations at:

- Jackson Street 12-Inch Water Main at Silvia Street - Western Boulevard 8-Inch located between Peralta Street and Simon - South Meter Vault 40-Feet South of the BART substation in the BART

Southern Alameda Yard Test Station The survey consisted of determining the level of cathodic protection currently being maintained on the structures and, if possible, adjusting the cathodic protection (CP) systems to meet NACE International criteria for cathodic protection. Based on the data obtained during the survey, all the reservoirs (except Garin Hill, which was not internally accessible at the time of testing and has a non-functioning rectifier) are currently receiving adequate cathodic protection. The Hesperian Aqueduct pipeline is receiving adequate cathodic protection at the majority of the test stations tested; however, approximately half of the pipeline test stations could not be located or accessed for testing, and seven (7) of the twelve (12) rectifiers associated with the system are not functional at this time, due to varying degrees of damage to the rectifiers and/or anode wells. The Industrial/Valle Vista pipelines are meeting the -850 mV NACE criteria for cathodic protection at a few of the test stations, but only about half of the test stations were able to be located and/or tested. Also, two (2) of the six (6) rectifiers are not functional. The 42-inch Wastewater Treatment Plant pipeline cathodic protection system components could not be located and contact to the pipeline could not be made; therefore, the status of cathodic protection on the pipeline could not be evaluated.


Contact points at accessible appurtenances for the DIP portion of the West Winton pipeline could not be confirmed to be continuous to the carrier pipe, therefore current requirement and electrical continuity testing was inconclusive. The soil resistivity testing for the West Winton pipeline and the Mission Pipeline indicated “moderately-corrosive” to “corrosive” soil. Thus, installation of cathodic protection systems should be considered for preventing external corrosion of the Mission Pipeline and the DIP section of the West Winton Pipeline, thereby extending the service life of these pipelines. No functioning BART line current monitoring stations were located; therefore, the status of stray current at those locations remains unknown. Remedial items, as required for overall improvement and maintenance of the CP systems, are provided in the Conclusions and Recommendations sections of this report.


SYSTEM DESCRIPTIONS RESERVOIRS 750 Highland Reservoir The 750 Highland Reservoir is a 161.75-foot diameter, 32-foot high aboveground storage tank (AST) of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of one (1) cathodic protection rectifier powering twenty-eight (28) platinized-niobium impressed-current wire anodes. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank for CP monitoring. 1000 Highland Reservoir The 1000 Highland Reservoir is a 70-foot diameter, 35-foot high aboveground storage tank of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of one (1) cathodic protection rectifier powering twenty-eight (28) platinized-niobium impressed-current wire anodes. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank. 1285 Highland Reservoir The 1285 Highland Reservoir is a 105-foot diameter, 35-foot high aboveground storage tank of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of a galvanic system with ten (10) magnesium rod anodes connected to the tank through a rheostat for current output adjustment. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank. 1530 Highland East Reservoir The 1530 Highland East Reservoir is a 128-foot diameter, 35-foot high aboveground storage tank of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of a galvanic system with sixteen (16) magnesium rod anodes connected to the tank through a rheostat for current output adjustment. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank. Garin Hill Reservoir The new Garin Hill Reservoir (previous tank replaced in 2006/7) is an 80-foot diameter, 35-foot high aboveground storage tank of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of one (1) cathodic protection rectifier powering nine (9) platinized-niobium impressed-current wire anodes. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank. South Walpert Reservoir The Walpert Reservoir is a 166-foot diameter, 41-foot high aboveground storage tank of welded-steel plate construction. The cathodic protection system installed for internal corrosion control of the AST consists of one (1) cathodic protection rectifier powering thirty-six (36) platinized-


niobium impressed-current wire anodes. Also, one (1) permanent copper/copper-sulfate reference electrode is installed in the tank. PIPELINES Hesperian Aqueduct The Hesperian Aqueduct consists of two sections of cement-mortar lined and coated, welded-steel pipeline (MLCWSP) water main. The two sections (North and South) are electrically isolated from each other by an inline isolation flange at Industrial Parkway. Hesperian North consists of 12,500 feet of 33-inch diameter pipe and runs along Hesperian Boulevard (in Hayward) from the Skywest Pump Station to Industrial Parkway. Hesperian South consists of 40,000 feet of 42-inch diameter pipe and runs along Hesperian Boulevard and then Union City Boulevard from Industrial Boulevard (at the Industrial Aqueduct tee) down to the Newark Slough at Thornton Avenue in Newark. The cathodic protection system installed for the Hesperian North pipeline consists of four (4) rectifiers and associated anode wells (Skywest, West Street, Depot Court, and Oliver Drive). The cathodic protection system installed for the Hesperian South pipeline consists of eight (8) rectifiers with associated anode wells (Pepsi, Union Sanitary, Silvertide Drive, Delores Drive, Melissa and Winslow, Alameda Creek, Bettencourt and Braidburn, and Hickory and Thornton). Industrial and Valle Vista Pipelines The Industrial Aqueduct consists of approximately 13,964 feet of 24-inch diameter welded-steel water main. The pipeline runs along Industrial Parkway from Hesperian Boulevard (a butterfly valve tee connecting to the 42-Inch Hesperian Aqueduct) to Mission Boulevard (an insulating joint tee into the Mission Aqueduct). The Valle Vista Sewage Force Main consists of 11,350 feet of 27-inch diameter concrete cylinder pipe with welded joints. The pipeline runs along Industrial Parkway, Arden Road, and Baumberg Court from the Valle Vista Pump Station (east of Highway 880) to a junction at a concrete vault (Weir Box) on Baumberg Court. The cathodic protection system originally designed and installed for the Valle Vista and Industrial pipelines consists of six (6) rectifiers and associated anode wells distributed along the pipelines (Mission, Taylor, Ruus Road, Hopkins, Well B, and Baumberg Court). 42-Inch Wastewater Treatment Plant (WWTP) Pipeline The 42-Inch diameter WWTP pipeline originally consisted of approximately 800 feet of 42-inch diameter mortar MLCWSP within the plant. The pipeline ran from the Fluid Bed Reactor (currently the Aeration Blower Building) through a valve vault north of the Final Clarifier (currently the Aeration Tanks) to the Outfall Junction Box (no longer exists). The pipeline then changed to a 12-inch MLCWSP from the Outfall Junction Box to the Equalization Pond Junction Box, and then a 45-inch diameter pipe MLCWSP from there to a tie-in to a 48-inch reinforced


concrete pipe (RCP). According to WWTP personnel, the pipeline no longer goes to the Outfall Junction Box, but goes directly west from the valve vault to a newly built control shed. The cathodic protection system originally installed for the pipeline consisted of five (5) anode junction boxes connecting pipe structure wires to multiple 60-pound anodes via potentiometers. (See drawing East Bay Dischargers Authority, Water Quality Management Program – Phase 1, Hayward Secondary Treatment Facilities – Unit No. 2, Cathodic Protection, 12/81, by Kennedy/Jenks Engineers) West Winton Aqueduct The West Winton Aqueduct reportedly consists of 2,000 feet of 30-inch diameter ductile iron pipeline (DIP) and 9,088 feet of 30-inch diameter asbestos cement pipeline (ACP). The pipeline runs primarily along West Winton Avenue from just east of Hesperian Boulevard to the intersection of Francisco Street and Mission Boulevard. The DIP section of the West Winton Aqueduct pipeline does not currently have any cathodic protection systems installed. Mission Boulevard Aqueduct The Mission Boulevard 24-inch Aqueduct reportedly consists of approximately 10.7 miles of 24-inch diameter concrete-cylinder pipeline built in 1956. The pipeline runs primarily along Mission Boulevard from a turnout northwest of Mission Boulevard and Callery Court in Hayward to Mission Boulevard and East Las Palmas Avenue in Fremont. The Mission Boulevard Aqueduct does not currently have any cathodic protection systems installed. B. A. R. T. MONITORING TEST STATIONS BART monitoring test stations were originally installed to monitor the stray current, if any, present on City of Hayward pipelines caused by BART lines in the vicinities of each of the test stations. The original locations of the three known test stations are:

- Jackson Street 12-Inch Water Main at Silvia Street - Western Boulevard 8-Inch located between Peralta Street and Simon - South Meter Vault 40-Feet South of the BART substation in the BART

Southern Alameda Yard Test Station


TEST PROCEDURES Test station locations surveyed by Corrpro were located using drawings and assistance provided by City of Hayward personnel. The following test procedures were used during the annual cathodic protection system survey: RESERVOIRS An internal tank-to-water potential survey of each tank was conducted. The potentials were measured with respect to a portable copper-copper-sulfate reference electrode (CSE) to incremental immersion depths at the man-way and the monitoring ports at each tank, as equipped. Potentials were measured with the cathodic protection system energized (On) and temporarily interrupted (Instant-Off) in manual mode, at the lowest tap set position possible while still closely matching the current output exhibited during potential control operation. ‘On’ and ‘Instant-Off’ structure potentials at the permanent reference electrodes were measured in automatic and manual control modes. Each cathodic protection rectifier was adjusted, as required, based on a field analysis of the measurement data, and restored to automatic operation. Rectifier output and tank-to-water potential survey data collected during the survey of the reservoirs is included with the reservoir potential data in Appendix 1. PIPELINES All pipe-to-soil potential measurements were made using a high-impedance digital multimeter and a portable copper/copper-sulfate reference electrode (CSE). Connections to the pipe for the potential tests were made at test station cables or by directly contacting the pipe, where possible. Anode currents were documented by measuring the voltage drop across the calibrated shunt within the test station or anode junction box and then calculating the current using Ohm’s law. Energized pipe-to-soil potentials were measured at each test location with the cathodic protection current applied (rectifier ON or anodes connected) and with the cathodic protection current momentarily interrupted (rectifier OFF or anodes disconnected). Geosynchronous current interrupters were utilized to simultaneously interrupt the current at all rectifiers affecting each section while testing. Rectifier output survey data collected during the survey of the pipelines is included in Appendix 2. Potential survey data collected for the pipelines is included in Appendix 3. The electrical continuity and current requirement data are included in Appendix 4. The soil resistivity data collected is included in Appendix 5. GPS coordinates for each test station and rectifier are listed in Appendix 6. Photographs of test stations and rectifiers are included in Appendix 7. A soil corrosivity analysis was conducted on the West Winton and Mission pipeline alignments to develop corrosion control recommendations. Soil resistivities along each pipeline were calculated from measurements made at representative locations along the pipelines utilizing a


Megger DET2/2 digital soil resistance meter and the ASTM G-57 Wenner Four-Pin Method. Measurements were taken in 5-foot increments up to 15-feet spacing. Where possible, measurements were taken in both the longitudinal and transverse directions at each location. Additionally, representative soil samples collected by Corrpro from five (5) locations along the West Winton pipeline and six (6) locations along the Mission pipeline alignment were subjected to chemical analysis to determine corrosivity. The samples were collected from depths of zero to 2 feet. Corrpro evaluated the soil chemical analysis information to determine the soil corrosive properties and to determine appropriate corrosion control measures.

The soil resistivity values indicate the relative capability of the soil at each location to carry electrical current and is generally recognized as the most significant soil characteristic with regard to corrosivity of the soil. Areas of low soil resistivity are more corrosive than areas of higher resistivity. Soil resistivity can also change dramatically with moisture content. Soil, which has a high resistivity when it is dry, can have substantially lower resistivity when wet or saturated depending on such factors as pH and chemical content. The degree of corrosion experienced in the low resistivity area is usually governed by the lowest measured resistivity. A relatively simple soil resistivity survey will indicate, with a high degree of accuracy, all areas likely to be actively corroding in accordance with the following guide:

Soil Resistivity (ohm-cm) Degree of Corrosivity 0 – 500 Very corrosive 501 –2,000 Corrosive 2,001 – 10,000 Moderately corrosive 10,001 – 30,000 Mildly corrosive Above 30,000 Negligible

Tests were also conducted to determine the electrical continuity and cathodic protection current requirement of the DIP portion of the West Winton pipeline using the current attenuation method. Attempts were made to impress cathodic protection current onto the respective pipeline(s) and then obtain pipe-to-soil potential measurements along the pipeline with the CP current momentarily interrupted. Where an “Instant OFF” of 100 millivolts or more negative than the original (Static) pipe-to-soil potential was observed at test locations, the pipeline was deemed electrically continuous and the associated current output was deemed the minimum current required to achieve cathodic protection of the pipe at that location. Otherwise, the pipeline section was considered electrically discontinuous.


CRITERIA NACE International has established criteria for cathodically protected reservoirs and pipelines. The criteria for reservoirs are set forth in Section 6 of the NACE Standards SP0388-2007 and RP0196-2004, and were applied to determine the adequacy of cathodic protection of the specified structures. Where NACE Criterion 6.2.1 and 6.2.2, and 6.3.1 and 6.3.2, respectively, are met, adequate internal cathodic protection of the reservoirs is indicated. Applicable portions of the referenced standards are included in Appendix 8 and 9. The criteria for pipelines are set forth in Section 6 of the NACE Standard SP0169-2007, and were applied to determine the adequacy of cathodic protection of the specified structures. Where NACE Criterion 6.2.2.1.1, 6.2.2.1.2, or 6.2.2.1.3 are met, adequate cathodic protection of the pipelines is indicated. Applicable portions of the referenced standard are included in Appendix 10.


RESULTS AND CONCLUSIONS RESERVOIRS Tank-to-water potential test data for the reservoirs (see Appendix 1) indicates that the all reservoirs tested meet NACE criteria (RP0388 and RP0196) for cathodic protection. However, access to the Garin Reservoir roof was not made available and testing was not possible. Also, the rectifier for the Garin Hill Reservoir cathodic protection system is obsolete and not functional and needs to be replaced with a modern cathodic protection rectifier. Therefore, it is assumed that the tank does not currently meet NACE criteria for cathodic protection. PIPELINES Hesperian Aqueduct

RECTIFIERS Skywest:

- The rectifier is in good working order and is operating correctly. West Street:

- The rectifier cabinet door’s lower hinge has failed and requires repair/replacement. - The rectifier ammeter has failed and requires replacement.

Depot Court:

- The rectifier ammeter has failed and requires replacement. Oliver Drive:

- The rectifier cabinet door’s lower hinge has failed and requires repair/replacement. - The rectifier is not outputting any current and requires troubleshooting to determine

the cause. Reportedly, the anode and/or structure wires may have been damaged by past construction activity in the area.

Pepsi:

- The rectifier is not outputting any current. - The rectifier enclosure is damaged and vandalized and requires replacement. - All wires associated with the rectifier have been cut and are missing and the rectifier

has been gutted. - There is no AC power available at the rectifier location. The City is reportedly

waiting on PG&E to supply AC power to the location. - The location requires a new rectifier. The new rectifier will require an AC or DC

power source to be supplied at the location. Union Sanitary:

- The rectifier is not outputting any current and requires troubleshooting to determine the cause.


- The rectifier cabinet door’s lower hinge has failed and requires repair/replacement. Silvertide:

- The rectifier is not outputting any current. - There is no AC power available at the rectifier location. The City is reportedly

waiting on PG&E to supply AC power to the location. Delores Drive:

- No access was provided to the rectifier. - According to City of Hayward personnel, there is no AC power available at the

rectifier location. The City is reportedly waiting on PG&E to supply AC power to the location.

Melissa and Winslow:


waiting on PG&E to supply AC power to the location. AC power lines were reportedly cut during construction activity in the area.

- The rectifier cabinet is bent and rusting and requires repair/replacement. - The anode well’s flush-to-grade Christy box is buried.

Alameda Creek:

- The rectifier cabinet door’s lower hinge has failed and requires repair/replacement. - The anode well’s flush-to-grade Christy G-4 box lid is missing and requires

replacement. Bettencourt and Braidburn:

- The rectifier ammeter has failed and requires replacement. Hickory and Thornton:


waiting on PG&E to supply AC power to the location. All other rectifiers are in good working condition and are operating properly.

TEST STATIONS Well B RFT:

- Pipe-to-soil potentials are not meeting -850 mV Instant-Off NACE criteria for cathodic protection. Depolarized pipe-to-soil potentials are needed to determine the cathodic protection status of the pipe at this location.

ETS 36, ETS 28, ETS 23R, ETS 22R, ETS 22R, 17R, 16R, 13, 11, (OL)-5R, 5, 4R, 3(OL)-3R, and F2:

- These test stations could not be located.


Industrial and Valle Vista Pipelines

RECTIFIERS Ruus Road:

- The rectifier was reportedly destroyed by a car accident. - The anode wires and a structure lead wire were found in a flush-to-grade Christy box

in the sidewalk. Measurements taken on the anode wires suggest anode lead wires are still electrically continuous to the individual anodes. However, the structure lead was found to be broken. The severed end of the remaining structure wire is underground approximately 2-feet east of the Christy box.

- The rectifier and structure wire should be replaced. Replacement of the anode well should also be considered, since the actual condition of the buried anode lead wires is unknown.

Hopkins:

- The rectifier is not outputting any current and requires troubleshooting to determine the cause.

- AC is present at the rectifier. - The rectifier’s AC disconnect enclosure cover is not weatherproof and should be

replaced.

TEST STATIONS W534+59:

- This test station could not be located. It appears that the test station’s G-5 box may only be paved over.

W498+21, W463+95, W462+50, S123+34, S140+99:

- These test stations could not be located. W463+65 RFT (Ruus Road Rectifier):

- See previous “Rectifiers” section. S204+25 (Post-mounted):

- Test lead wires and test station conduit are missing and require replacement. Hopkins RFT (Hopkins Rectifier), W426+12 (West), S168+93, S112+94:

- Pipe-to-Soil potentials are not meeting -850 mV Instant-Off NACE criteria for cathodic protection. Depolarized pipe-to-soil potentials are needed to determine the cathodic protection status of the pipe at this location.

Wastewater Treatment Plant 42-Inch Pipeline

- The five (5) anode junction boxes originally installed for the pipeline were not able to be located and no cathodic protection measurements were able to be taken. Therefore, no conclusions pertaining to the cathodic protection status of the pipeline can be made.


West Winton Pipeline Soil Corrosivity Testing:

- Soil resistivity and chemical analysis measurements along the pipeline indicate that the soil in the area of the pipeline is moderately-corrosive to corrosive. Thus, cathodic protection should be considered for extending the service life of the pipeline.

Current Requirement and Electrical Continuity Testing:

- Current requirement and electrical continuity testing of the DIP section of the pipeline was inconclusive.

- Contact to the carrier pipe could not be confirmed at any of the appurtenances (valves, etc.) identified as possible contact locations. Tests conducted at these locations indicated that most or all of the appurtenances are most likely electrically isolated from the carrier pipe.

- Installation of pipe test leads (at approximately three locations) along the DIP section of the pipeline is required for current requirement, electrical continuity, and corrosion monitoring testing.

Mission Boulevard 24-Inch Aqueduct Soil Corrosivity Testing:

- Soil resistivity and chemical analysis measurements along the pipeline indicate that the soil in the area of the pipeline is moderately-corrosive to corrosive. Thus, cathodic protection should be considered for extending the service life of the pipeline.

BART Line Current Monitoring Stations Jackson Street 12-Inch Water Main at Silvia Street:

- This test station enclosure has been knocked off its concrete footing and gutted. Only AC power wires and the enclosure are left. The concrete footing is also damaged.

Western Boulevard 8-Inch located between Peralta Street and Simon:

- This test station could not be located. South Meter Vault 40-Feet South of the BART substation in the BART Southern Alameda Yard Test Station:

- This test station could not be located.


RECOMMENDATIONS Continue to maintain and operate the ICCP system rectifiers at the present output settings. Operating voltage and current output should be read from the rectifier panel meter(s) and recorded monthly. Report to Corrpro any variance in excess of ±20% compared to the values recorded during this survey. Institute a program to conduct annual cathodic protection surveys for all structures addressed in this report. It is also recommended that the following items be addressed: RESERVOIRS Garin Hill Reservoir Conduct a cathodic protection design survey to determine the cathodic protection status of the Garin Hill Reservoir and to determine the size and type of cathodic protection rectifier required to replace the existing, non-functioning rectifier. Based on the design survey, it may be determined that the anodes also need to be replaced. PIPELINES Hesperian Aqueduct

RECTIFIERS West Street:

- Repair or replace the rectifier cabinet door’s lower hinge, door, or the whole enclosure.

- Replace the rectifier ammeter. Depot Court:

- Replace the rectifier ammeter. Oliver Drive:


- Troubleshoot the rectifier to determine why it has no current output. - Energize the anode and structure wires with a test rectifier to determine if they are

functional. Pepsi:

- Install a new rectifier and anode well at this location. Consider a solar-powered system if AC power is not able to be provided.

Union Sanitary:


- Troubleshoot the rectifier to determine why it has no current output. - Repair or replace the rectifier cabinet door’s lower hinge, door, or the whole

enclosure. Silvertide:

- Troubleshoot the rectifier to determine why it has no current output. - Consider a solar-power supply, if AC power is not able to be provided.

Delores Drive:

- Provide access to this rectifier to facilitate inspection. - Consider a solar-power supply, if AC power is not able to be provided.

Melissa and Winslow:

- Troubleshoot the rectifier to determine why it has no current output. - Consider a solar-power supply, if AC power is not able to be provided. - Repair or replace the rectifier cabinet. - Locate and raise to grade the anode well’s flush-to-grade Christy box.

Alameda Creek:


- Replace the lid for the anode well’s flush-to-grade Christy G-4 box. Bettencourt and Braidburn:

- Replace the rectifier ammeter. Hickory and Thornton:

- Troubleshoot the rectifier to determine why it has no current output. - Consider a solar-power supply, if AC power is not able to be provided.

TEST STATIONS

Well B RFT:

- Collect depolarized pipe-to-soil potentials to determine the cathodic protection status of the pipe at this location. This will involve turning the rectifier(s) off for a period of time and then monitoring the pipe-to-soil potentials.

ETS 36, ETS 28, ETS 23R, ETS 22R, ETS 22R, 17R, 16R, 13, 11, (OL)-5R, 5, 4R, 3(OL)-3R, and F2:

- Locate or replace these test stations, if feasible.


Industrial and Valle Vista Pipelines

RECTIFIERS Ruus Road:

- Replace the rectifier and structure wire. - If economically feasible, install a new anode well, since the functionality of the

buried anode lead wires cannot be guaranteed, and operation of the rectifier with damaged anode lead wires will result in failed anode lead wires.

Hopkins:

- Troubleshoot the rectifier to determine why it has no current output. - Replace the rectifier’s AC disconnect enclosure cover.

TEST STATIONS W534+59, W498+21, W463+95, W462+50, S123+34, S140+99:

- Locate or replace these test stations, if feasible. W463+65 RFT (Ruus Road Rectifier):

- See Ruus Road rectifier recommendations. S204+25 (Post-mounted):

- Replace test lead wires and test station conduit. Hopkins RFT (Hopkins Rectifier), W426+12 (West), S168+93, S112+94:

- Collect depolarized pipe-to-soil potentials to determine the cathodic protection status of the pipe at this location.

Wastewater Treatment Plant 42-Inch Pipeline

- Locate or replace the missing anode junction boxes originally installed for the pipeline, for proper cathodic protection monitoring.

West Winton Pipeline

- Install corrosion monitoring test stations (3 each) along the DIP section of the pipeline to conduct current requirement, electrical continuity, and corrosion monitoring testing, and to determine the next step in providing cathodic protection to the pipeline. The test stations should be installed at both ends and near the middle of the DIP section. A corrosion inspection is also recommended when the pipe is excavated for installation of the test stations.


Mission Pipeline

- Install corrosion monitoring test stations along the pipeline at 1-mile intervals (approximately 11 total) to conduct current requirement, electrical continuity, and corrosion monitoring testing, and to determine the next step in providing cathodic protection to the pipeline. A corrosion inspection is also recommended when the pipe is excavated for installation of the test stations.

BART LINE CURRENT MONITORING STATIONS Jackson Street 12-Inch Water Main at Silvia Street:

- Install a new Current Monitoring Station at this location. Western Boulevard 8-Inch located between Peralta Street and Simon:

- Locate or replace this test station. South Meter Vault 40-Feet South of the BART substation in the BART Southern Alameda Yard Test Station:

- Locate or replace this test station.

APPENDICES

APPENDIX 1

CITY OF HAYWARDPROJECT NO. 623-7041

RESERVOIRSHAYWARD, CA

RECTIFIER AND POTENTIAL DATA

MARCH 2009

NAME / ID: 750 Highland ReservoirLOCATION:MANUFACTURER:MODEL: CTAYSA 40-12DSERIAL NO.TYPE/FEATURES: Automatic potential-controlled.A.C. INPUT:D.C. OUTPUT:SHUNT: 15 A / 50 mVANODE SYSTEM:

Date Status Setting Volts Amps Auto/Man On I-Off Set Actual By Remarks3/11/09 AF A-4 9.2 1.9 Auto 1099 1000 1080 1080 GDM Portable Meter3/11/09 AT A-4 9.2 2.0 Manual 1477 1152 1080 1080 GDM Portable Meter3/11/09 AL A-4 9.2 2.0 Auto 1477 1152 1080 1080 GDM Portable Meter

TANK-TO-WATER POTENTIALS (-mV to Portable CSE)

Depth (Ft.) On I-Off

0 (22/28) 2595 10505 2467 1054

10 2128 103715 1792 102320 1554 100422 1492 1000

Notes:1. Status: AF = As Found, AT = As Tested, AL = As Left2. Pot. = Potential3. CSE = Copper/Copper-Sulfate Reference Electrode.4. Depth of tank-to-water potentials measured from surface of water.6 Tank was about 90% full.

DC Output

0.063-inch diameter platinized niobium wire anodes (28) with #14 HMW/PE anode lead wire.

Goodall

82H1109

40 Volts, 12 Amps

Pot. Meas. (-mV) Pot. Meas. (-mV)

5349.02 City of Hayward (Proj 623-7041) APP 1 - Reservoir Data (Final) Page 1 of 6

APPENDIX 1




MARCH 2009

NAME / ID: 1000 Highland ReservoirLOCATION:MANUFACTURER:MODEL: CTAYSA 40-4DSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 2.2 Amps, 1 PhaseD.C. OUTPUT:SHUNT: 5 A / 50 mVANODE SYSTEM:

Date Status Setting Volts Amps Auto/Man Pot. Meas. (V) Pot. Set (V) By Remarks3/12/09 AF A-3 3.5 0.1 Auto 1.16 0.84 BM Panel Meters3/12/09 AT A-3 4.5 0.2 Man 0.908 0.88 BM Portable Meter3/12/09 AL A-3 4.5 0.2 Auto 1.21 0.85 BM Portable Meter3/12/09 AL A-3 4.0 0.2 Auto 1.18 0.88 BM Panel Meters



0 (23/30) 2756 10515 2630 1090

10 2590 104015 2390 100620 2390 101825 2240 1049


DC Output

Goodall

82H1110

40 Volts, 4 Amps

0.063-inch diameter platinized niobium wire anodes (28) with #14 HMW/PE anode lead wire.


APPENDIX 1




MARCH 2009

NAME / ID: 1285 Highland ReservoirLOCATION:MANUFACTURER:MODEL: A7-P-0020 (Anode junction box).SERIAL NO.TYPE/FEATURES: Galvanic SystemSHUNT: 2 A / 200 mVANODE SYSTEM:

REMARKS:

Date Status % Volts Amperes On I-Off By Remarks3/11/09 AF 19 N/A 0.0 1.168 0.954 GDM Panel Meters3/11/09 AF 19 1.354* 0.2 1.176 0.966 GDM Portable Meter3/11/09 AT 19 4.8 0.4 2.365 1.5 GDM Portable Meter3/11/09 AL 19 4.8 0.4 1.05 - GDM Portable Meter



0 (28/32) 1198 9915 1195 988

10 1193 99315 1191 99420 1189 99525 1188 98228 1186 1000

Notes:1. Status: AF = As Found, AT = As Tested, AL = As Left2. Pot. = Potential3. CSE = Copper/Copper-Sulfate Reference Electrode.4. Depth of tank-to-water potentials measured from surface of water.6 Tank was about 90% full.7. New tank installed in 2005 (replacement for old 1285).8 * Open circuit anode potential.

DC Output

Ten (10) 2-inch diameter, 10-foot long, 25-pound magnesium rod anodes with #8 HMWPE anode lead and header wires.

Corrpower

C-021700JB

Pot. Meas.

New tank installed in 2005 as a replacement for the original 1285 Highland Reservoir.


APPENDIX 1




MARCH 2009

NAME / ID: 1530 Highland ReservoirLOCATION:MANUFACTURER:MODEL: C-051930 (Anode Junction Box)SERIAL NO.TYPE/FEATURES: Galvanic SystemA.C. INPUT: N/AD.C. OUTPUT:SHUNT: 2 A / 200 mVANODE SYSTEM:

REMARKS:

Date Status % Volts Amperes By Remarks3/11/09 AF / AL 40 N/A 0.0 GDM Panel Meters3/11/09 AF / AL 40 N/A 0.2 GDM Portable Meter

TANK-TO-WATER POTENTIALS (-mV to CSE)

To Depth (Ft.) On I-Off

Ref 1 - 1208 986Ref 2 - 1200 969

Portable 0 (28/32) 1250 1006Portable 5 1244 1000Portable 10 242 1000Portable 15 1238 996Portable 20 1236 955

Notes:1. Status: AF = As Found, AT = As Tested, AL = As Left2. Pot. = Potential3. CSE = Copper/Copper-Sulfate Reference Electrode.4. Ref 1, 2 = Permanent CSE, Portable = Portable CSE. 5. Depth of tank-to-water potentials measured from surface of water.

DC Output

Sixteen (16) 2-inch diameter, 10-foot long, 25-pound magnesium rod anodes with #8 HMWPE anode lead and header wires.

Corrpower

C-021700JB

N/A


APPENDIX 1




MARCH 2009

NAME / ID: Garrin ReservoirLOCATION:MANUFACTURER:MODEL: 0195SERIAL NO.TYPE/FEATURES: Installed by Cathodic Protection Services Waterworks Division (Springfield, NJ).A.C. INPUT: 110 Volts, 7 Amps, 1 PhaseD.C. OUTPUT:SHUNT: N/AANODE SYSTEM:

Man. Aux-1 Aux-2Date Status Setting Volts Amps Auto/Man A-1 Cell A-2 Cell Pot. Set I Set I Ratio I Ratio By Remarks

3/12/09 AF / AL - 0.0 0.0 Manual -2.0 -2.0 0.95 0 0 0 BM Panel Meters


Depth (Ft.) On I-Off- - -

Notes:1. Status: AF = As Found, AT = As Tested, AL = As Left2. Pot. = Potential3. CSE = Copper/Copper-Sulfate Reference Electrode.4. Depth of tank-to-water potentials measured from surface of water.6 No access to the ladder. No static potentials taken.

DC Output

Nine (9) 0.063-inch diameter platinized niobium wire anodes.

Micro-Polatrol

19178

25 Volts, 20 Amps


APPENDIX 1




MARCH 2009

NAME / ID: South Walpert ReservoirLOCATION:MANUFACTURER:MODEL: CTAYSA 40-12SERIAL NO.TYPE/FEATURES: CustomA.C. INPUT:D.C. OUTPUT:SHUNT:ANODE SYSTEM:

Date Status Setting Volts Amperes Auto/Man On I-Off Pot. Set By Remarks3/11/09 AF A-3 6.0 0.3 Auto 1.05 - 0.85 GDM Panel Meters3/11/09 AF A-3 5.9 0.2 Auto 1.05 - 0.85 GDM Portable Meter3/11/09 AT A-2 4.8 0.4 Man 2.36 1.5 1 GDM Portable Meter3/11/09 AL A-2 4.8 0.4 Auto 1.05 - 1 GDM Portable Meter



0 (23/30) 2929 11035 2900 1115

10 2840 110015 2775 110720 2712 111425 2614 1117


DC Output

Thirty-six (36) 0.063-inch diameter platinized niobium wire anodes.

Goodall

82H1108

40 Volts, 12 Amps

Pot. Meas.


NAME: SkywestLOCATION: Hesperian Blvd. and Skywest Drive (Skywest Pump Station)MANUFACTURER:MODEL: CAYSE 30-16 Z88,251,509,1001,1502SERIAL NO.TYPE/FEATURES: Tap-AdjustedA.C. INPUT: 115/230 Volts, 6.91/3.45 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 20 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)GROUNDBED DATA:

REMARKS:

Date Setting Volts Amperes By Remarks

9/4/07 A-1 0.50 0.50 BM As Energized9/13/07 B-1 7.60 7.32 BM As Adjusted / Left2/19/09 B-1 7.9 6.0 BM As found / As left

ANODE CURRENT OUTPUT (Amps):

Anode No. 2/18/09

1 0.692 1.723 0.864 1.035 1.656 1.47

Total 7.42

APPENDIX 2


HESPERIAN AQUEDUCT PIPELINE (42-INCH AND 33-INCH)

MARCH 2009

DC Output

HAYWARD, CA

RECTIFIER AND GROUNDBED DATA

Connection to EBMUD. Connection to SFPUC.

C-061339

30 Volts, 16 Amperes

Five (5) Hi-Silicon Cast Iron Anodes with Coke-Breeze Backfill in a 111' Deep Well.

5349.02 City of Hayward (Proj 623-7041) APP 2 - PL Rectifier Data (Final) Page 1 of 18

NAME: West Street (Prev. Hesperian rectifier No.11 in 1997 report.)LOCATION: Hesperian Blvd. and West Street (North end of Hesperian Pipeline)MANUFACTURER: GoodallMODEL: CSAYSA 18-12 DFRSZSERIAL NO.TYPE/FEATURES: Custom A.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15A / 50 mV (Rectifier), 0.01 Ohm (Anode junction box)REMARKS:

Date Setting Volts Amperes Filter Bypass By Remarks

2/18/09 C-4 3.4 1.5 On BM As found / As left


Anode No. 2/18/09

1 0.262 0.173 0.134 0.145 0.136 0.167 0.128 0.139 0.13

10 0.18Total: 1.55

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


Cabinet door lower hinge broken. Ammeter broken.

83C2357



NAME: Depot Court (Prev. Hesperian rectifier No.10 in 1997 report.)LOCATION: Hesperian Blvd. and Depot CourtMANUFACTURER: GoodallMODEL: CSAYSA 18-12 DFRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/18/09 A-3 2.4 0.8 On BM As found / As left


Anode No. 2/18/09

1 0.112 0.073 0.054 0.075 0.086 0.087 0.098 0.009 0.10

10 0.10Total 0.75

DC Output

Ammeter broken.

93C2358


HAYWARD, CA


MARCH 2009

APPENDIX 2




NAME: Oliver Drive (Prev. Hesperian rectifier No.9 in 1997 report.)LOCATION: Hesperian Blvd. and Oliver DriveMANUFACTURER: GoodallMODEL: CAYSE 18-12 FRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:




Anode No. 2/18/09

1 0.002 0.003 0.004 0.005 0.00

Total 0.00

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


83C2153


Cabinet has broken lower door hinge. Rectifier Fuse and AC to rectifier are operational.


NAME: Pepsi (Prev. Hesperian rectifier No.8 in 1997 report.)LOCATION: Hesperian Blvd. and South Pepsi Drive (Alameda Flood Control Trench)MANUFACTURER: GoodallMODEL: CAYSE 18-12 FRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:REMARKS:


2/18/09 - - - - BM As found / As left

MARCH 2009

HAYWARD, CA


82C2154

APPENDIX 2



18 Volts, 12 AmperesEnclosure needs replacement. Damaged by construction activity. All wires are cut. New AC power required. If solar panel utilized, vandalism prevention required. City is waiting on PG&E.

DC Output


NAME: Union Sanitary (Prev. Hesperian rectifier No.7 in 1997 report.)LOCATION: Whipple Road and Benson Road in Union CityMANUFACTURER: GoodallMODEL: CSAYSA 18-12 FRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS: Cabinet door's lower hinge broken.


2/18/09 A-5 5.0 4.1 Off BM As found / As left


Anode No. 2/18/09

1 0.012 0.003 0.264 0.305 0.516 0.177 0.548 1.499 0.73

10 1.25Total 5.26

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


83C2148



NAME: Silvertide Drive (Prev. Hesperian rectifier No.6 in 1997 report.)LOCATION: Union City Blvd. and Silvertide Drive in Union CityMANUFACTURER: GoodallMODEL: CSAYSA 12-12 DFRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 2.2 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mVREMARKS: No AC at rectifier. Waiting on PG&E.


2/18/09 B-2 0.6 0.0 Off BM As found / As left

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


83C2152



NAME: Delores DriveLOCATION: Union City Blvd. and Delores Drive in Union City (By Alameda Creek Overpass)MANUFACTURER:MODEL:SERIAL NO.TYPE/FEATURES:A.C. INPUT:D.C. OUTPUT:SHUNT:REMARKS:


2/18/09 - - - - BM No access

DC Output

MARCH 2009

HAYWARD, CA


No key available for access through fence gate.

CITY OF HAYWARD

APPENDIX 2

PROJECT NO. 623-7041HESPERIAN AQUEDUCT PIPELINE (42-INCH AND 33-INCH)


NAME:LOCATION: Melissa Terrace and Winslow Terrace in FremontMANUFACTURER: GoodallMODEL: CSAYSA 12-12 SERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 2.2 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mVREMARKS: AC to rectifier cut in street during construction. Rectifier cabinet bent

and rusting. Anode well box buried.


2/18/09 B-5 0.6 0.0 BM As found / As left

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


82C2151


Melissa and Winslow (Prev. Hesperian rectifier No.5 in 1997 report.)


NAME: Alameda Creek (Prev. Hesperian rectifier No.4 in 1997 report.)LOCATION: Union City Blvd. at Alameda Creek Trail in FremontMANUFACTURER: GoodallMODEL: CSAYSA 18-12 DFRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/18/09 B-1 5.8 3.0 On BM As found / As left


Anode No. 2/18/09

1 0.602 0.443 0.604 0.635 0.80

Total 3.07

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


Rectifier cabinet door's lower hinge broken. In high grass. Anode well traffic box lid missing.

83C2356



NAME: Bettencourt and Braidburn (Prev. Hesperian rectifier No.2 in 1997 report.)LOCATION: Bettencourt Street and Braidburn Avenue in NewarkMANUFACTURER: GoodallMODEL: CSAYSA 18-12 FRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/18/09 B-1 5.4 3.9 On BM As found / As left


Anode No. 2/18/09

1 0.922 0.733 0.654 0.635 0.93

Total 3.86

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


Ammeter broken.

83C2150



NAME: Hickory and Thornton (Prev. Hesperian rectifier No.1 in 1997 report.)LOCATION: Hickory Street and Thornton Avenue in NewarkMANUFACTURER: GoodallMODEL: CSAYSA 18-12 FRSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 3.3 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 15 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:




Anode No. 2/18/09

1 0.002 0.003 0.004 0.005 0.00

Total 0.00

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


No AC supplied by PG&E. Possible solar location.

83C2149



NAME: Mission (Prev. Industrial rectifier No.1 in 1997 report.)LOCATION: Industrial Pkwy. and Mission Blvd.MANUFACTURER: CorrpowerMODEL: CSAYSA 40-22 AVOZ90, 183SERIAL NO.TYPE/FEATURES:A.C. INPUT: 115/230 Volts, 12.0/6.0 Amperes, 1/3 PhaseD.C. OUTPUT:SHUNT: 25 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/18/09 A-2 3.0 1.4 BM As found / As left


Anode No. 2/18/09

1 0.092 0.043 0.084 0.125 0.116 0.137 0.128 0.139 0.19

10 0.07Total 1.08

MARCH 2009

DC Output

Green rectifier enclosure. Negative Test & Drain leads on junction panel.

C-021836


APPENDIX 2



INDUSTRIAL 24-INCH PIPELINEHAYWARD, CA


NAME: Taylor (Prev. Industrial rectifier No.2 in 1997 report.)LOCATION: Industrial Pkwy. and Taylor AvenueMANUFACTURER: CorrpowerMODEL:SERIAL NO.TYPE/FEATURES: Constant-PotentialA.C. INPUT:D.C. OUTPUT:SHUNT: 25 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box) ANODE BED:

REMARKS: IR-Free / On-Potential Modes.

Date Setting Volts Amperes Mode Auto/Man Pot. Adjust By Remarks

2/18/09 A-4 3.7 2.0 IR-Free Manual 70% BM As Found / As Left


Anode No. 2/18/09

1 0.232 0.313 0.274 0.065 0.166 0.127 0.228 0.129 0.23

10 0.25Total 1.97

HAYWARD, CA


MARCH 2009

DC Output

One (1) 10-inch diameter, 200-foot deep, vertical anode well with six (6) 1-Inch O.D. by 40-inch long mixed-metal oxide anodes.

C-061526

APPENDIX 2


INDUSTRIAL 24-INCH PIPELINE


NAME: Ruus Rd. (Prev. Industrial rectifier No.3 in 1997 report.)LOCATION: 1,500 feet West of Ruus Road on Industrial Parkway.MANUFACTURER:MODEL:SERIAL NO.TYPE/FEATURES:A.C. INPUT:D.C. OUTPUT:SHUNT:REMARKS:


3/31/09 - - - - BM Only wires in Meter Box

STRUCTURE-TO-SOIL POTENTIALS (-mV) FOR "WATER" CHRISTY BOX WIRES

Wire Size/Color Static Structure Lead

#8 Blk HMW 304 Anode lead?#8 Blk HMW 233 Anode lead?#8 Blk HMW 235 Anode lead?#8 Blk HMW 306 Anode lead?#8 Blk HMW 307 Anode lead?#8 Blk HMW 230 Anode lead?#8 Blk HMW 301 Anode lead?#8 Blk HMW 260 Anode lead?#8 Blk HMW 304 Anode lead?#8 Blk HMW 305 Anode lead?#2 Blk HMW - Pipe lead?

APPENDIX 2



Rectifier destroyed by car accident years ago. Anode wires and structure wire still present in 2x1-foot "Water" Christy Box located in sidewalk. Structure wire was found to be severed and was pulled out of the earth and left in the box.

DC Output

HAYWARD, CA


MARCH 2009

NAME: Hopkins (Prev. Industrial rectifier No.4 in 1997 report.)LOCATION: Industrial Pkwy. And Hopkins StreetMANUFACTURER: GoodallMODEL: CPAYSA 24-20 ADEFPSZSERIAL NO.TYPE/FEATURES: CustomA.C. INPUT: 115 Volts, 6.9 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 25 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:

Date Setting Volts Amperes AC Ref (V) Set (V) By Remarks

2/19/09 A-4 1.5 0.0 On 0.15 0 BM As found2/19/09 A-4 1.5 0.0 Off 0.15 0 BM As left


Anode No. 2/19/2009

1 0.002 0.003 0.004 0.005 0.006 0.00

Total: 0.0

APPENDIX 2



DC Output

75A1044


HAYWARD, CA


MARCH 2009

AC disconnect enclosure / cover is not weather proof. Needs to be repaired or replaced. AC present at AC disconnect. AC to rectifier okay. Old pulse-generator installed.


NAME: Well B (Prev. Industrial rectifier No.5 in 1997 report.)LOCATION: Hesperian Blvd. and Industrial Pkwy. (28475 Hesperian Blvd.)MANUFACTURER: Integrated Rectifier Technologies, Inc.MODEL: BMASFS 18-22 DMSYSERIAL NO.TYPE/FEATURES:A.C. INPUT: 115/230 Volts 6.14/3.07 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 25 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/19/09 C-2 5.4 3.6 BM As found / As left


Anode No. 2/18/09

1 0.472 0.493 0.194 0.005 0.606 0.227 0.468 0.349 0.25

10 0.77Total 3.79

PIPELINE CURRENT RETURNS (AMPS):

PIPE ID. 2/18/09

27-Inch FM 2.8242-Inch W 0.93

Total 3.75

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


05R-0799



NAME: Baumberg Court (Prev. Industrial rectifier No.6 in 1997 report.)LOCATION: End of Baumberg Court (West of Baumberg Avenue)MANUFACTURER: GoodallMODEL: CSOYSE 40-28 EGPSERIAL NO.TYPE/FEATURES: Custom, Oil-FilledA.C. INPUT: 115/230 Volts, 15.7/7.7 Amperes, 1 PhaseD.C. OUTPUT:SHUNT: 50 A / 50 mV (Rectifier), 0.01Ohm (Anode junction box)REMARKS:


2/19/09 A-5 12.1 0.1 BM As found / As left


Anode No. 2/18/09

1 0.002 0.003 0.004 0.025 0.046 0.007 0.008 0.009 0.00

10 0.01Total 0.07

APPENDIX 2



DC Output

MARCH 2009

HAYWARD, CA


81C1286



TS Enclosure/Panel RectifierTS ID Type Wire Size/Color Depol. On I-Off Polar. Remarks

Skywest RFT RFT Rectifier Cabinet Skywest Pump Station#10 Wht-Red Tape (Test) 1466 1068#10 Wht-Blue Tape (Test) 1476 1085#12 Yel-Red Tape (Ref) 400 156#12 Yel-Blue Tape (Ref) 344 83

ETS-43 ETS G-5 Box "ETS", Orange Little Fink#8 Blk 894 870 Not found during 1997 survey#8 Red 894 870

ETS-41 ETS G-5 Box "ETS", Little Fink#8 Blk 888 880 Not found during 1997 survey#8 Red 888 880

ETS-39 ETS G-5 Box "ETS", Little Fink#8 Blk 894 894 Broken G-5 lid.#8 Red 894 894

Well B RFT RFT Wall mounted Junction Box, 12"x15" Panel ETS-36 relocated to Well B RFT?#10 Blk HMW (27"FM) 819 750#10 Blk HMW (42"W) 744 661 Hesperian 42-inch pipeline#10 Blk HMW (Red tape Zinc) 1125 1088No wire (33" W) - -

ETS 36 ETS CNL Relocated to Well B RFT?

Pipe-To-Soil Potentials (-mV)

APPENDIX 3

CITY OF HAYWARD

MARCH 2009

HESPERIAN PIPELINE (42-INCH AND 33-INCH)HAYWARD, CA

PROJECT NO. 623-7041

PIPE-TO-SOIL POTENTIAL DATA

5349.02 City of Hayward (Proj 623-7041) APP 3 - PL S-T-S Data (Final) Page 1 of 8



APPENDIX 3

CITY OF HAYWARD

MARCH 2009




ETS-33R ETS G-5 Box "ETS", Little Fink In field behind building near #8 Blk 965 958 railroad

ETS-32 ETS G-5 Box "ETS", Little Fink In field behind building near #8 Blk (Top) 960 952 railroad#8 Blk (Bottom) 955 949

ETS-31 ETS G-5 Box "ETS", Little Fink#8 Blk 964 953

ETS 28 ETS CNL

ETS 27 ETS CNL

ETS 23R ETS CNL

ETS-22R - - - 40 FT south of rose way St light.south band. Need to be dug up.

ETS-20 - Post-Mounted Gray Test Box Not found during 1997 survey.#8 Blk 983 974#8 Red 983 972




APPENDIX 3

CITY OF HAYWARD

MARCH 2009




ETS-19 - Post-Mounted Gray Test Box#8 Blk 970 950#8 Red 973 952

ETS 17R ETS CNL

ETS 16R ETS CNL

ETS 13 ETS CNL

ETS-12 ETS G-5 Box "ETS", Little Fink Previously ETS 5 in 1997 report.#8 Blk 945 945 TS needs to be moved to the edge#8 Red 945 945 of sidewalk

ETS 11 ETS CNL

ETS-10 ETS G-5 Box "Water", Little Fink#8 Blk 969 962#8 Red 969 962

ETS (OL)-5R ETS CNL

ETS 5 ETS CNL

ETS 4R ETS CNL




APPENDIX 3

CITY OF HAYWARD

MARCH 2009




ETS 3 (OL)-3R ETS CNL

ETS-F2 ETS CNL Thornton Avenue, Newark, CA

Notes:1. TS ID = Test station name.2. Depol. = "Depolarized Static" structure-to-soil potential.3. On = Structure-to-soil potential with cathodic protection current applied.4. I-Off = Structure-to-soil potential with cathodic protection current momentarily interrupted. 5. Polar. = "I-Off" - "Depol."6. CSE = Copper/Copper-Sulfate Reference Electrode.


TS Enclosure/Panel RectifierPL ID TS ID Type Wire Size/Color Depol. On I-Off Polar. Remarks

W 534+59 ETS (IJTS) CNL G-5 box possibly paved over in intersection.

W 534+59 RFT Rectifier enclosure, Test Panel Mission Rectifier#8 Blk HMW (Test) 1104 948

W 498+61 RFT Rectifier enclosure, Test Panel Taylor Rectifier(Reference cell) 1118 1106

W 498+21 ETS CNL

W 463+95 ETS CNL

W 463+65 RFT 2x1-foot "Water" Christy Box Ruus Road Rectifier#8 Blk HWM (x10) (Anodes) See Rectifier Data#2 Blk HMW Wire broken

W 462+50 ETS CNL

S 204+25 ETS Post-mounted Test Box No more conduit or wires to test box.

- - RFT Rectifier enclosure, Test Panel Hopkins Rectifier - Not Operational#8 Blk HMW (Test) 792 768

W 426+12 (West) G-5 "Water"#8 Blu HMW Solid 805 793


APPENDIX 3

CITY OF HAYWARD

MARCH 2009

INDUSTRIAL 24-INCH AND VALLE VISTA 27-INCH PIPELINESHAYWARD, CA




TS Enclosure/Panel RectifierPL ID TS ID Type Wire Size/Color Depol. On I-Off Polar. Remarks


APPENDIX 3

CITY OF HAYWARD

MARCH 2009

INDUSTRIAL 24-INCH AND VALLE VISTA 27-INCH PIPELINESHAYWARD, CA



W 426+12 (East) G-5 "Water"#8 Wht 1170 1170#6 HMW Blk 858 850

S 168+93 G-5 "Water" 817 794

- - RFT - - - - - Well B Rectifier

- - RFT - - - - - Baumberg Rectifier

S 112+94 ETS Post-mounted Test Box#8 Blk 823 823

S 123+34 - CNL

S 140+99 - CNL

Notes:1. PL ID: Water (W), Sewer (S)2. TS ID = Test station name.3. Depol. = "Depolarized Static" structure-to-soil potential.4. On = Structure-to-soil potential with cathodic protection current applied.5. I-Off = Structure-to-soil potential with cathodic protection current momentarily interrupted. 6. Polar. = "I-Off" - "Depol."7. CSE = Copper/Copper-Sulfate Reference Electrode.


Enclosure/Panel RectifierWater Main ID BARTD TS ID Wire Size/Color Depol. On I-Off Polar. Remarks

Jackson Street Jackson Street Overpass 100-ft south of BART Tracks, east side of Jackson Street at end of Silva AvenueUSPS Drop Box Style

#12 Wht (C1) 450 AC Electric Wiring?#12 Wht (C2) 85 AC Electric Wiring?#12 Red (P1) 448 AC Electric Wiring?#12 Red (P2) 390 AC Electric Wiring?#10 Blk (R) 50 AC Electric Wiring?

Unknown BARTD X-1 CNL In median, 400-feet northeast of BARTD rail crossing (from partial report)On Valle Vista 27" / Industrial Parkway 24"?

Unknown BARTD X-2 CNL North of BARTD rail crossingOn Valle Vista 27" / Industrial Parkway 24"?

Reportedly no longer exists

Western Boulevard Western Boulevard CNL Located on Western Boulevard between Peralta and Simon Street

Mission Boulevard Mission Boulevard CNL In the pressure-reducing vault at Mission Boulevard and Fairway Street

C Street C Street CNL Located at C Street and Sutro Street intersection.

Hesperian Hesperian 1 CNL In meter box at Sta. 393+40, south of Industrial Parkway.

Hesperian Hesperian 2 CNL In meter repair shop at Industrial Parkway and Hesperian Boulevard.

Structure-To-Soil Potentials (-mV)

APPENDIX 3

CITY OF HAYWARD

MARCH 2009

B. A. R. T. MONITORING TEST STATIONSHAYWARD, CA




Enclosure/Panel RectifierWater Main ID BARTD TS ID Wire Size/Color Depol. On I-Off Polar. Remarks

Structure-To-Soil Potentials (-mV)

APPENDIX 3

CITY OF HAYWARD

MARCH 2009

B. A. R. T. MONITORING TEST STATIONSHAYWARD, CA



Unknown Southern Alameda Yard CNL In the south meter vault, 40-feet south of the BARTD Substation.

Notes:1. Water Main ID: Associated pipeline name.2. BARTD TS ID = Test station name.3. Depol. = "Depolarized Static" structure-to-soil potential.4. On = Structure-to-soil potential with cathodic protection current applied.5. I-Off = Structure-to-soil potential with cathodic protection current momentarily interrupted. 6. Polar. = "I-Off" - "Depol."7. CSE = Copper/Copper-Sulfate Reference Electrode.8. Reportedly, the Jackson Street water main is a 12-inch diameter, cast-iron pipeline with unbonded joints that runs along Jackson Street.9. Reportedly, the Western Boulevard water main is an 8-inch diameter, cast-iron pipeline with unbonded joints that runs along the east side of Western Boulevard.

10. Reportedly, the Mission Boulevard water main is a 24-inch diameter, concrete-coated, welded steel pipeline that runs along Mission Boulevard.11. Reportedly, the C Street water main is a 6-inch diameter, unbonded cast-iron pipeline.


Test Soil Resistance (Ohm) @ Depth (Ft) Soil Resistivity (Ohm-cm) @ Depth (Ft)No. 5 10 15 5 10 15 0'-5' 5'-10' 10'-15'

1 2.6 1.3 0.8 2,470 2,405 2,430 2,470 2,343 2,4822 2.0 0.9 0.6 1,905 1,754 1,672 1,905 1,625 1,5283 1.9 1.13 0.73 1,787 2,164 2,085 1,787 2,743 1,9444 1.7 0.84 0.67 1,656 1,605 1,919 1,656 1,556 3,1535 2.9 1.5 0.9 2,777 2,811 2,677 2,777 2,847 2,4446 2.1 1.19 0.91 2,039 2,271 2,602 2,039 2,562 3,6747 1.9 0.74 0.57 1,783 1,409 1,632 1,783 1,165 2,3838 2.9 1.31 0.67 2,748 2,505 1,910 2,748 2,301 1,295

Avg 2.2 1.10 0.74 2146 2116 2116 2146 2143 2363

Test Locations:1, 2 Fransisco St. & D St. In library lawn (1. Watkins St. side, 2. Mission Blvd side).3, 4 Winton Ave. & Connery Ct. (3. In landscaping near stop sign., 4. In landscaping by HS near Soto Rd.)5, 6 Winton Ave. & Edloe Dr. (5. In landscaping in front of Hayward PD, 6. In landscaping at bus stop.)

7 In sidewalk landscaping in front of 533 Meek Ave.8 Perpendicular to D St., NE of intersection of D St. and Grand St. at the entrance of Meridian Apartments.

Notes:1. Survey Equipment: Megger DET2/2 soil resistance meter, using Wenner 4 Pin Method.2. Ground conditions at the time of testing were slightly moist.

Layer Resistivity (Ohm-cm)

HAYWARD, CA

SOIL RESITIVITY DATA - BARNES LAYER ANALYSIS

MARCH 2009

APPENDIX 4


WEST WINTON PIPELINE

5349.02 City of Hayward (Proj 623-7041) APP 4 - West Winton Soil Resistivity Data (Final) 1 of 2

Sample Depth, ft. pH Sulfate ChlorideNo. (ppm) (ppm)1 0 - 2 6.9 55 402 0 - 2 6.8 25 403 0 - 2 6.8 70 404 0 - 2 6.2 55 205 0 - 2 7.4 50 40

Ave: 6.8 51 36

Notes:Soil samples collected during March 2009.

Min. Resistivity

HAYWARD, CA

SOIL CHEMICAL ANALYSIS DATA

MARCH 2009

3,158

2,7603,5803,700

(Ohm-cm)3,480

2,270

APPENDIX 4

PROJECT NO. 623-7041CITY OF HAYWARD

WEST WINTON PIPELINE

5349.02 City of Hayward (Proj 623-7041) APP 4 - West Winton Soil Resistivity Data (Final) 2 of 2

TestNo. 5 10 5 10 0'-5' 5'-10'

1 2.00 0.76 1,911 1,459 1,911 1,1802 0.66 0.19 632 356 632 2483 1.66 1.18 1,589 2,260 1,589 3,9074 30.70 0.90 29,395 1,724 29,395 8885 2.32 1.03 2,221 1,972 2,221 1,7746 3.74 1.28 3,581 2,451 3,581 1,8637 0.97 0.39 929 747 929 6258 1.33 1.20 1,277 2,294 1,277 11,2529 9.37 2.59 8,972 4,960 8,972 3,427

10 6.18 4.83 5,917 9,249 5,917 21,17111 5.93 3.11 5,678 5,956 5,678 6,262

Avg 5.90 1.59 5646 3039 5646 4781

Test Locations:1 Mission Blvd. & Pinedale Ct.2 Mission Blvd. & Devon3 Mission Blvd. & Broadway St.4 29587 Mission Blvd.5 Mission Blvd., Landscaping N-E corner of intersection6 Mission Blvd., Landscaping on West side7 Mission Blvd., Landscaping 15' West of shoulder8 35637 Mission Blvd.9 Mission Blvd. & Niles Canyon

10 Mission Blvd., Landscaping on West side11 Mission Blvd. West side across from school

Notes:1. Survey Equipment: Megger DET2/2 soil resistance meter, using Wenner 4 Pin Method.2. Ground conditions at the time of testing were generally dry.

APPENDIX 5


MISSION PIPELINE

Layer Resistivity (Ohm-cm)

HAYWARD, CA

SOIL RESITIVITY DATA - BARNES LAYER ANALYSIS

JULY 2009

Soil Resistance (Ohm) @ Depth (Ft) Soil Resistivity (Ohm-cm) @ Depth (Ft)

5349.02 City of Hayward (Proj 623-7041) APP 5 - Mission Soil Resistivity Data (Final) 1 of 2

Sample Depth, ft. pH Sulfate ChlorideNo. (ppm) (ppm)1 0 - 2 6.6 70 202 0 - 2 6.2 50 403 0 - 2 7.2 35 404 0 - 2 6.2 65 405 0 - 2 6.7 80 406 0 - 2 6.8 50 40

Ave: 6.6 58 37

Notes:Soil samples collected during July 2009.

APPENDIX 5


MISSION PIPELINEHAYWARD, CA

SOIL CHEMICAL ANALYSIS DATA

JULY 2009

2,3302,710

2,1201,9263,008

Min. Resistivity(Ohm-cm)

6,3202,640

5349.02 City of Hayward (Proj 623-7041) APP 5 - Mission Soil Resistivity Data (Final) 2 of 2

Name Degrees North Degrees WestBART TS 37.665300 122.0824001000 Res 37.654267 122.0317501285 Res 37.658167 122.0132001530 Res 37.639733 121.989117750 Res 37.658383 122.044733

Garin Res 37.631950 122.032733S. Walpert Res 37.668850 122.072300West Rectifier 37.647883 122.107450Depot Rectifier 37.638917 122.102000

Oliver Drive Rectifier 37.626867 122.094650Pepsi Rectifier 37.609667 122.085350

Union Sanitary Rectifier 37.594500 122.086417Silvertide Rectifier 37.583800 122.080933Dolores Rectifier 37.569850 122.076217

Alameda Creek Rectifier 37.564317 122.066733Melissa and Winslow Rectifier 37.553900 122.058250

Bettencourt and Braidburn Rectifier 37.540600 122.055083Hickory and Thornton Rectifier 37.526317 122.056200

Mission Rectifier 37.629383 122.047033Taylor Rectifier 37.622667 122.055733

Hopkins Rectifier 37.617517 122.078117Well B Rectifier 37.617583 122.088817

Baumberg Rectifier 37.618783 122.104400Skywest Rectifier 37.657767 122.113717

Coh-R46355 37.618000 122.065450Ets x 37.619717 122.107583Ets10 37.544550 122.055750Ets12 37.533567 122.054200Ets19 37.566200 122.069600Ets20 37.568517 122.073833

Ets22R 37.574883 122.079717Ets31 37.598350 122.086917Ets32 37.602583 122.087217Ets33 37.606567 122.087717

Ets33R 37.607450 122.087783Ets39 37.624617 122.092900Ets41 37.629617 122.096000Ets43 37.634300 122.098917

I/VV Ets 112+94 37.618767 122.104500

HAYWARD, CA

GPS DATA

MARCH 2009

APPENDIX 6


5349.02 City of Hayward (Proj 623-7041) APP 6 - GPS Data (Final) Page 1 of 2

Name Degrees North Degrees West

HAYWARD, CA

GPS DATA

MARCH 2009

APPENDIX 6


I/VV Ets 153+50 37.653383 122.109117I/VV Ets 168+93S 37.617900 122.085567I/VV Ets 426+12 37.617617 122.078150

Ww17300 37.655833 122.103083Ww194375 37.658267 122.096417Ww21580 37.661033 122.089917Ww2192 37.666867 122.086900Ww2465 37.665233 122.085783Ww2786 37.664250 122.087350Ww498 37.667917 122.085083Ww577 37.668833 122.081317Ww582 37.669567 122.082483Wwav 37.653500 122.109117Wwprs 37.652933 122.110567

Note:1. WGS 84 Datum.2. Ets = Test station on Hepserian Pipeline3. I/VV = Industrial / Valle Vista Pipelines4. Ww = West Winton Pipeline5. RES = Reservoir6. ps = pump station

5349.02 City of Hayward (Proj 623-7041) APP 6 - GPS Data (Final) Page 2 of 2

5349.02 City of Hayward (Proj 623-7041) APP 7 - Photos (Final) Page 1 of 21

APPENDIX 7

CITY OF HAYWARD

PROJECT NO. 623-7041 HESPERIAN 42-INCH PIPELINE

HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

ETS 12 ETS 12

ETS 10 ETS 19


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

ETS 20 ETS 20

ETS 22R ETS 22R


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

31 32

32 33R


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

33R 39

41 43


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Bettencourt and Braidburn Rectifier Bettencourt and Braidburn Rectifier

Alameda Creek Rectifier Alameda Creek Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Dolores Rectifier Silvertide Rectifier

Union Sanitary Rectifier Pepsi Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Depot Rectifier West Rectifier

Skywest Rectifier Melissa and Winslow Rectifier


APPENDIX 7

CITY OF HAYWARD

PROJECT NO. 623-7041 INDUSTRIAL 24-INCH AND VALLE VISTA 27-INCH PIPELINES

HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Baumberg Rectifier Baumberg Rectifier

Well B Rectifier Well B Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Taylor Rectifier Taylor Rectifier

Mission Rectifier Mission Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

112+94 (S) ETS 168+93 (S) ETS

204+25 (S) ETS 204+25 (S) ETS


APPENDIX 7

CITY OF HAYWARD PROJECT NO. 623-7041

INDUSTRIAL 24-INCH AND VALLE VISTA 27-INCH PIPELINES HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

426+12 (W) East 426+12 (W) West

426+12 (W)


APPENDIX 7


WEST WINTON 30-INCH PIPELINE HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

5+77 Blow off Stand pipe, Mission Blvd.

& Willis Ave. 14+98 2x3 Christy Box

21+92 4x3 Christy box, Grand St. & D St. 194+37.5 2x3 Christy Box, W. Winton & Edloe Dr.


APPENDIX 7



PHOTOGRAPHS

MARCH 2009

215 +80 4x3 Christy Box, Winton Ave &

Cannery 215 +80 4x3 Christy Box, Winton Ave &

Cannery

4X3 Christy Box, Winton Ave 4X3 Christy Box, Winton Ave


APPENDIX 7



PHOTOGRAPHS

MARCH 2009

Blowoff, Francisco St. and D St. Blowoff, Francisco St. and D St.

West Winton PRS West Winton PRS


APPENDIX 7

CITY OF HAYWARD

PROJECT NO. 623-7041 WEST WINTON 30-INCH PIPELINE

HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Valve 24+56 2x3 Christy Box, Grand St. & Dean St.

Valve 24+56 2x3 Christy Box, Grand St & Dean St.

5+77 Current Attenuation Testing 5+77 Current Attenuation Testing


APPENDIX 7

CITY OF HAYWARD

PROJECT NO. 623-7041 WEST WINTON 30-INCH PIPELINE

HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

21+92 Soil Resistivity Measurement 21+92 Soil Resistivity Measurement


APPENDIX 7

CITY OF HAYWARD

PROJECT NO. 623-7041 RESERVOIRS

HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

750 Highland Reservoir Rectifier 750 Highland Reservoir Rectifier



APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009




APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009


South Walpert Reservoir Rectifier South Walpert Reservoir Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

South Walpert Reservoir Test Station South Walpert Reservoir Test Station

Garin Ave Reservoir Rectifier Garin Ave Reservoir Rectifier


APPENDIX 7

CITY OF HAYWARD


HAYWARD, CA

PHOTOGRAPHS

MARCH 2009

Ruus Rd Rectifier Ruus Rd Rectifier

BARTD Monitoring Test Station -

Jackson St. BARTD Monitoring Test Station -

Jackson St.

5349.02 City of Hayward (Proj 623-7041) 2009 Annual Survey Report (Final) Appendix 8 Page 1 of 1

APPENDIX 8

NATIONAL ASSOCIATION OF CORROSION ENGINEERS INTERNATIONAL STANDARD SP0388-2007

CATHODIC PROTECTION OF INTERNAL SUBMERGED SURFACES OF STEEL

WATER STORAGE TANKS

SECTION 6 CRITERIA FOR CATHODIC PROTECTION AND MEASUREMENT PROCEDURES (EXTRACT)

6.1 Introduction

6.1.1 This section describes the criteria for impressed current cathodic protection along with measurement techniques which, when followed, provide virtually complete corrosion control on the internal submerged surfaces of steel water storage tanks.

6.1.2 The criterion in Paragraph 6.2 has been developed through laboratory experiments and has been verified by evaluating data obtained from successfully operated impressed current cathodic protection systems. It is not intended that the corrosion engineer be limited to these criteria if it can be demonstrated that corrosion control can be otherwise achieved.

6.1.3 Measurement of the voltage between the tank and a reference electrode placed in the water shall be used to determine whether adequate cathodic protection has been achieved. This voltage is referred to as tank-to-water potential.

6.2 Criteria

6.2.1 A negative, polarized tank-to-water potential of at least -850 mV relative to a saturated copper/copper sulfate reference electrode (CSE); or

6.2.2 A minimum of 100 mV of cathodic polarization between the tank surface and a stable reference electrode contacting the electrolyte. The formation or decay of polarization can be measured to satisfy this criterion.

CAUTIONARY NOTE: The 100 mV polarization shift criterion is only applicable to steel water tanks not having corrosion cells caused by connection to more noble metals such as copper, brass, or passive stainless steel (e.g., heated water tanks in which the submerged heater tubes are constructed of copper or brass, and are electrically continuous with the submerged steel tank).


APPENDIX 9


GALVANIC ANODE CATHODIC PROTECTION OF INTERNAL SUBMERGED

SURFACES OF STEEL WATER STORAGE TANKS

SECTION 6 CRITERIA AND OTHER CONSIDERATIONS FOR CATHODIC PROTECTION (EXTRACT)

6.1 Introduction

6.1.1 The purpose of this section is to list the criteria for CP, which, when complied with, either separately or collectively, indicate that adequate CP of submerged portions of steel water tank interiors has been achieved.

6.3 Criteria for Steel Water Tanks 6.3.1 A negative polarized tank-to-water potential of at least 850 mV relative to a CSE.

OR

6.3.2 A minimum of 100 mV of cathodic polarization between the structure surface and a stable reference electrode contacting the electrolyte. The formation or decay of polarization can be measured to satisfy this criterion. CAUTIONARY NOTE: This criterion is only applicable to steel water tanks not having corrosion cells caused by connection to more noble metals such as copper, brass, or passive stainless steel (e.g., heated water tanks wherein the submerged heater tube is of copper or brass materials and is electrically continuous with the submerged metal of the tank).


APPENDIX 10


CONTROL OF EXTERNAL CORROSION ON UNDERGROUND

OR SUBMERGED METALLIC PIPING SYSTEMS

SECTION 6 CRITERIA AND OTHER CONSIDERATIONS FOR CATHODIC PROTECTION (EXTRACT)

6.1 Introduction

6.1.1 This section lists criteria and other considerations for cathodic protection that indicate, when used either separately or in combination, whether adequate cathodic protection of a metallic piping system has been achieved (see also Section 1, Paragraphs 1.2 and 1.4).

6.1 Criteria

6.1.1 It is not intended that persons responsible for external corrosion control be limited to the criteria listed below. Criteria that have been successfully applied on existing piping systems can continue to be used on those piping systems. Any other criteria used must achieve corrosion control comparable to that attained with the criteria therein.

6.2.2 Steel and Cast Iron Structures

6.2.2.1 External corrosion control can be achieved at various levels of cathodic polarization depending on the environmental conditions. However, in the absence of specific data that demonstrate that adequate cathodic protection has been achieved, one or more of the following shall apply:

6.2.2.1.1 A negative (cathodic) potential of at least 850mV with the cathodic protection applied. This potential is measured with respect to a saturated copper/copper sulfate reference electrode contacting the electrolyte. Voltage drops other than those across the structure-to-electrolyte boundary must be considered for valid interpretation of these voltage measurements.

NOTE: Consideration is understood to mean the application of sound engineering practice in determining the significance of voltage drops by methods such as:

6.2.2.1.1.1 Measuring or calculating the voltage drop(s); 6.2.2.1.1.2 Reviewing the historical performance of the cathodic protection system; 6.2.2.1.1.3 Evaluating the physical and electrical characteristics of the pipe and its environment; and 6.2.2.1.1.4 Determining whether or not there is physical evidence of corrosion.

6.2.2.1.2 A negative polarized potential (see definition in Section 2) of at least 850 mV relative to a saturated copper/copper sulfate reference electrode. 6.2.2.1.3 A minimum of 100 mV of cathodic polarization between the structure surface and a stable reference electrode contacting the electrolyte. The formation or decay of polarization can be measured to satisfy this criterion.

2009 Annual Survey Report and Appendices-Phase I[1]

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