Appendix B Leak Detection for Fueling Systems.pdf

FY25 FED GUIDE SPECIFICATIONS AS OF 7 NOVEMBER 2024

VARIOUS LOCATIONS, KOREA

USACE / NAVFAC / AFCEC UFGS- 33 01 50. 31 ( Febr uar y 2020)

Pr epar i ng Act i v i t y: USACE Superseding UFGS- 33 58 00 ( Apr i l 2008)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2024

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 01 50.31

LEAK DETECTION FOR FUELING SYSTEMS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 DELIVERY, STORAGE, AND HANDLING

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.1.1 Nameplates

2.1.2 Metallic Requirements

2.2 ELECTRICAL WORK

2.2.1 Underground Wiring

2.2.2 Grounding and Bonding

2.3 LEAK DETECTION SYSTEM

2.3.1 Underground Storage Tanks

2.3.2 Aboveground Vaulted Storage Tanks

2.3.3 Underground Piping associated with tanks less than or equal to

50,000 gallons

2.3.4 Containment Sumps

2.3.5 Monitoring Wells

2.4 ELECTRONIC MONITORING/ALARM PANEL FOR PIPELINES ASSOCIATED WITH

TANKS GREATER THAN 50,000 GALLONS

2.4.1 Panel Housing

2.4.2 Panel Alarms

2.4.2.1 Audible Alarm

2.4.2.2 Visual Alarm

2.4.3 Acknowledge Switch

2.5 COMPUTATIONAL PIPELINE MONITORING SYSTEM

2.6 FINISHES

2.6.1 Factory Coating

2.6.2 Field Painting

PART 3 EXECUTION

SECTION 33 01 50.31 Page 1

3.1 INSTALLATION

3.1.1 Storage Tank Sensors/Detectors

3.1.2 Automatic Line Leak Detector

3.1.3 Sensors in Sumps

3.2 FIELD QUALITY CONTROL

3.2.1 Leak Detection System Test

3.2.2 Storage Tank Tightness Tests

3.2.3 Tank Fill Tests

3.3 DEMONSTRATIONS

-- End of Section Table of Contents --

SECTION 33 01 50.31 Page 2

USACE / NAVFAC / AFCEC UFGS- 33 01 50. 31 ( Febr uar y 2020)

Pr epar i ng Act i v i t y: USACE Superseding UFGS- 33 58 00 ( Apr i l 2008)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2024

SECTION 33 01 50.31

LEAK DETECTION FOR FUELING SYSTEMS

NOTE: Thi s gui de speci f i cat i on out l i nes many of t he r equi r ement s f or l eak det ect i on syst ems f or f uel i ng applications.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

PART 1 GENERAL

NOTE: Thi s speci f i cat i on does not addr ess t he moni t or i ng of t ank bot t oms f or f i el d- f abr i cat ed, ver t i cal st or age t anks.

Use t hi s UFGS i n conj unct i on wi t h UFC 3- 460- 01 " Desi gn: Pet r ol eum Fuel Faci l i t i es" . I ncl ude i n t hi s speci f i cat i on any addi t i onal equi pment / devi ces necessar y t o meet st at e and l ocal r egul at i ons.

UFC 3- 460- 01 r equi r es under gr ound st or age t anks and under gr ound pi pi ng t o be moni t or ed f or l eaks i n accor dance wi t h 40 CFR 280, 40 CFR 281, 49 CFR 195, and any appl i cabl e st at e and l ocal r equi r ement s.

SECTION 33 01 50.31 Page 3

I n or der t o meet SPCC ( 40 CFR 112) pr ogr am r equi r ement s and/ or as a best management pr act i ce, al l under gr ound pi pes associ at ed wi t h Abovegr ound St or age Tanks ( ASTs) must meet t he secondar y cont ai nment and/ or l eak det ect i on pr ovi s i ons of 40 CFR 280, 40 CFR 281, and any appl i cabl e st at e and l ocal r equi r ement s - see spec wr i t er not es under UNDERGROUND PI PI NG sect i on.

Var i ous met hods can be used t o conf or m t o t he l eak det ect i on and moni t or i ng r equi r ement s of t he CFRs.

Thi s speci f i cat i on cover s t he pr ef er r ed met hods r el at ed t o t anks and pi pi ng. Var i at i ons f r om t hi s speci f i cat i on must be coor di nat ed wi t h and appr oved by t he Usi ng Agency.

1.1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN PETROLEUM INSTITUTE (API)

API RP 540 (1999; R 2004) Electrical Installations in Petroleum Processing Plants

API RP 1130 (2007; R 2017) Computational Pipeline Monitoring for Liquids

API RP 2003 (2015; 8th Ed) Protection Against Ignitions Arising out of Static, Lightning, and Stray Currents

SECTION 33 01 50.31 Page 4

ASTM INTERNATIONAL (ASTM)

ASTM B117 (2019) Standard Practice for Operating Salt Spray (Fog) Apparatus

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 142 (2007; Errata 2014) Recommended Practice for Grounding of Industrial and Commercial Power Systems - IEEE Green Book

IEEE 1100 (2005) Emerald Book IEEE Recommended Practice for Powering and Grounding Electronic Equipment

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2020) Enclosures for Electrical Equipment (1000 Volts Maximum)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2023) National Electrical Code

NFPA 77 (2024; ERTA 1 2023) Recommended Practice on Static Electricity

NFPA 407 (2022; TIA 21-1) Standard for Aircraft Fuel Servicing

NFPA 780 (2023) Standard for the Installation of Lightning Protection Systems

1.2 SUBMITTALS

NOTE: Revi ew submi t t al descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t , and cor r espondi ng submi t t al i t ems i n t he t ext , t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect . The Gui de Speci f i cat i on t echni cal edi t or s have cl assi f i ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a “ G” t o an i t em, i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For Ar my pr oj ect s, f i l l i n t he empt y br acket s f ol l owi ng t he " G" c l assi f i cat i on, wi t h a code of up t o t hr ee char act er s t o i ndi cat e t he appr ovi ng aut hor i t y. Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy

SECTION 33 01 50.31 Page 5 and Ai r For ce pr oj ect s.

The " S" c l assi f i cat i on i ndi cat es submi t t al s r equi r ed as pr oof of compl i ance f or sust ai nabi l i t y Gui di ng Pr i nci pl es Val i dat i on or Thi r d Par t y Cer t i f i cat i on and as descr i bed i n Sect i on 01 33 00 SUBMI TTAL

PROCEDURES.

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for Contractor Quality Control approval. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government. Submit the following in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Leak Detection System ; G

Electronic Monitoring/Alarm Panel

Computational Pipeline Monitoring System

SD-03 Product Data

Leak Detection System ; G

Electronic Monitoring/Alarm Panel

Computational Pipeline Monitoring System

SD-06 Test Reports

Leak Detection System Test ; G

SD-07 Certificates

Demonstrations

SD-08 Manufacturer's Instructions

Leak Detection System

SD-10 Operation and Maintenance Data

Leak Detection System ; G

Electronic Monitoring/Alarm Panel ; G

Computational Pipeline Monitoring System ; G

1.3 DELIVERY, STORAGE, AND HANDLING

Handle, store, and protect equipment and materials to prevent damage before and during installation in accordance with the manufacturer's recommendations, and as approved by the Contracting Officer. Replace damaged or defective items.

SECTION 33 01 50.31 Page 6

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

Provide materials and equipment that are standard products of a manufacturer regularly engaged in the manufacturing of such products, that are of a similar material, design and workmanship, and that have been in satisfactory commercial or industrial use for a minimum 2 years prior to bid opening. Include applications of the equipment and materials under similar circumstances and of similar size. Materials and equipment must have been for sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2 year period.[ Products having less than a 2 year field service record will be acceptable if a certified record of satisfactory field operation, for not less than 6000 hours, exclusive of the manufacturer's factory tests, can be shown.]

2.1.1 Nameplates

NOTE: I n a sal t wat er envi r onment , subst i t ut e accept abl e non- cor r odi ng met al such as, but not l i mi t ed t o, ni ckel - copper , 304 st ai nl ess st eel , or monel . Al umi num i s unaccept abl e. Nomencl at ur e ( or syst em i dent i f i cat i on) shoul d be est abl i shed by t he designer.

Requi r e mel ami ne pl ast i c namepl at es f or al l NAVFAC pr oj ect s. Al so f or NAVFAC pr oj ect s, r equi r e namepl at es t o be associ at ed or keyed t o syst em char t s and schedul es.

Attach nameplates to all specified equipment defined herein. List on each nameplate the manufacturer's name, address, [contract number,] [acceptance date,] component type or style, model or serial number, catalog number, capacity or size, and the system which is controlled. Construct plates of [anodized aluminum] [stainless steel] [melamine plastic, 3 mm thick, UV resistance, black with white center core, matte finish surface and square corners] [_____]. Install nameplates in prominent locations with nonferrous screws, nonferrous bolts, or permanent adhesive. Provide nameplates with a minimum size of 25 by 65 mm . Provide normal block style lettering with a minimum 6 mm height. Accurately align all lettering on nameplates. [For plastic nameplates, engrave lettering into the white core.] [Key the nameplates to a chart and schedule for each system.

Frame charts and schedule under glass, and locate where directed near each system. Furnish two copies of each chart and schedule. Provide nameplate identifying its function.]

2.1.2 Metallic Requirements

NOTE: I ncl ude t he br acket ed i nf or mat i on i f avi at i on f uel wi l l be handl ed.

Do not construct internal parts and components of equipment, piping, piping components, and valves that could be exposed to fuel during system operation of zinc coated (galvanized) metal[, brass, bronze, or other

SECTION 33 01 50.31 Page 7 copper bearing alloys]. Do not install cast iron bodied valves in piping systems that could be exposed to fuel during system operation.

2.2 ELECTRICAL WORK

NOTE: Coor di nat e t he i gni t i on t emper at ur e of t he f uel ( s) t o be handl ed wi t h t he el ect r i cal desi gn.

I gni t i on t emper at ur es wi l l be as def i ned i n NFPA 497M. Fuel i gni t i on t emper at ur es wi l l di ct at e t he maxi mum al l owabl e t emper at ur e r at i ng of t he el ect r i cal equi pment .

Provide controllers, integral disconnects, contactors, controls, and control wiring with their respective pieces of equipment. Provide electrical equipment, including motors and wiring, as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Provide switches and devices necessary for controlling and protecting electrical equipment. Provide controllers and contactors that have a maximum of 120-volt control circuits and that have auxiliary contacts for use with the controls provided.

2.2.1 Underground Wiring

Enclose underground electrical wiring in PVC coated conduit.

Dielectrically isolate conduit at any steel storage tank connection.

2.2.2 Grounding and Bonding

Perform grounding and bonding in accordance with NFPA 70 , NFPA 77 , NFPA 407 , NFPA 780 , API RP 540 , API RP 2003 , IEEE 142 , and IEEE 1100 . Provide jumpers to overcome the insulating effects of gaskets, paints, or nonmetallic components.

2.3 LEAK DETECTION SYSTEM

NOTE: Thi s par agr aph and subsequent sub- par agr aphs addr ess pr i mar i l y l eak det ect i on syst ems t hat conf or m t o 40 CFR 280 and 40 CFR 281. For l eak det ect i on syst ems appl i cabl e t o l ar ge f uel di st r i but i on syst ems ( 49 CFR 195) , r ef er t o par agr aph COMPUTATI ONAL PI PELI NE MONI TORI NG SYSTEM.

Provide a system, including sensors and detectors, that is intrinsically safe for use in a Class 1, Division 1, Group D environment as defined by NFPA 70 . Provide system compatible with the fuel to be handled. Furnish sensors that distinguish and report the difference between hydrocarbons and water. Provide electronic output and transmission from sensors and detectors. Provide sensors that have a minimum probability of detection of 95 percent and a maximum probability of false alarm of 5 percent.

Provide sensors and detectors that are compatible with the electronic monitoring/alarm panel. Reuse sensors after an alarm condition is sensed. Submit shop drawings for the leak detection system that include the following.

a. Wiring schematics for all parts of the system showing each

SECTION 33 01 50.31 Page 8 operating device and listing their normal ranges of operating values (including pressures, temperatures, voltages, currents, speeds, etc.).

b. Single line diagrams of the entire system, including any required alterations to the existing piping and tank(s).

c. Diagrams for posting that include distance markings such that alarm indications can be correlated to leak location in plan view. Include a piping and wiring display map with schematic diagrams from the leak detection system manufacturer. Frame diagrams under glass or laminated plastic and be posted where indicated by the Contracting Officer.

2.3.1 Underground Storage Tanks

NOTE: 40 CFR 280 and 40 CFR 281 def i ne and r egul at e under gr ound st or age t ank ( UST) syst ems. Accor di ng t o t hese CFRs, UST syst ems ar e def i ned as one or mor e combi nat i on of under gr ound t anks ( i ncl udi ng under gr ound pi pes connect ed t her et o) t hat ar e used t o cont ai n an accumul at i on of r egul at ed subst ances, and t he vol ume of whi ch ( i ncl udi ng t he vol ume of under gr ound pi pes connect ed t her et o) i s 10 per cent or mor e beneat h t he sur f ace of t he gr ound.

Per t he CFRs, UST syst ems do not cover under gr ound t anks l ess t han or equal t o 416 L, uand t anks used f or st or i ng heat i ng oi l f or consumpt i ve use on t he pr emi ses wher e st or ed. NOTE: Heat i ng oi l t anks must meet secondar y cont ai nment and l eak det ect i on r equi r ement s of 40 CFR 280 / 281 t o meet pr ovi s i ons of Spi l l Pr event i on Count er measur e and Cont r ol ( SPCC) Pr ogr am.

UFGS 33 56 10 r equi r es al l new under gr ound st or age t anks be t he doubl e- wal l ed t ype. The r equi r ed l eak det ect i on met hod f or t hese t ype t anks i s t o cont i nuousl y and aut omat i cal l y moni t or t he t ank' s i nt er st i t i al space. The syst em used must be capabl e of det ect i ng bot h f uel r el eased t hr ough a t ank' s i nt er i or wal l as wel l as t he i nf l ux of gr ound wat er t hr ough a t ank' s ext er i or wal l .

Furnish system that continuously and automatically monitors the interstitial space of an underground tank for breaches in the integrity of the inner and/or outer tank shells. Monitor the interstitial space by using either an electronic capacitance type liquid sensor or a positive pressure system. Monitoring the interstitial space of a fiberglass reinforced plastic (FRP) tank may be performed using a liquid-filled interstitial space monitoring system. Freeze protect (brine) the liquid solution used in a liquid-filled interstitial and contain appropriate corrosion inhibitors. Detect and discriminate between high and low brine level conditions.

SECTION 33 01 50.31 Page 9

2.3.2 Aboveground Vaulted Storage Tanks

Al l abovegr ound st or age t anks r equi r e l eak det ect i on. Thi s l eak det ect i on can be:

Vi sual - such as a dedi cat ed i ndi cat or on a vaul t ed tank.

Manual - such as a manual access por t used t o st i ck t he i nt er st i ce.

El ect r oni c - such as an el ect r oni c capaci t ance t ype, or s i mi l ar .

NOTE: Pr ovi de el ect r oni c and/ or v i sual i nt er st i t i al moni t or i ng i f r equi r ed by t he Usi ng Agency.

I nt er st i t i al moni t or i ng f or abovegr ound t anks i s not r equi r ed.

As ment i oned pr evi ousl y, t hi s speci f i cat i on does not addr ess t he moni t or i ng of t ank bot t oms f or f i el d- f abr i cat ed, ver t i cal st or age t anks. For t hese t ype appl i cat i ons r ef er t o St andar d Desi gn AW

78- 24- 27 ABOVEGROUND VERTI CAL STEEL TANKS W/ FLOATI NG

PANS AND FI XED ROOFS.

Furnish system that continuously and automatically monitors the interstitial space of a vaulted tank for breaches in the integrity of the primary tank and the exterior vaulted shell. Provide a manual access port that can be used to stick the interstice. In addition, provide either (1) a visual method that can automatically monitor the interstitial space such as a Pop-Up gauge, or (2) an electronic method such as an electronic capacitance type liquid sensor.

2.3.3 Underground Piping associated with tanks less than or equal to 50,000 gallons

NOTE: Thi s sect i on addr esses t he l eak det ect i on r equi r ement s associ at ed wi t h under gr ound f uel pi pes ( bot h pr essur i zed and suct i on) t hat ar e r egul at ed by 40 CFR 280 and 40 CFR 281.

For pi pes associ at ed wi t h t anks l ess t han or equal t o 50, 000 gal l ons i n capaci t y t hat ar e not par t of an ai r por t hydr ant syst em, t he f ol l owi ng i s r equi r ed per 40 CFR 280 Subpar t D:

Pr essur i zed and suct i on pi pi ng must be doubl e wal l ed wi t h i nt er st i t i al moni t or i ng - i ncl ude CONTAI NMENT SUMPS par agr aph.

Pr essur i zed pi pi ng must be equi pped wi t h an aut omat i c l i ne l eak det ect i on syst em - i ncl ude par agr aph f r om t hi s UNDERGROUND PI PI NG sect i on.

SECTION 33 01 50.31 Page 10

The use of i nt egr al l y i nst al l ed l i qui d and/ or vapor sensor s i nst al l ed wi t hi n t he i nt er st i t i al space of doubl e- wal l ed pi pi ng i s di scour aged and i s not cover ed i n t hi s speci f i cat i on.

For UST syst ems wi t h f i el d- const r uct ed t anks and ai r por t hydr ant f uel di st r i but i on syst ems, 40 CFR 280 Subpar t K al l ows f or al t er nat i ve l eak det ect i on st r at egi es. The speci f i cat i on wr i t er must del i neat e l eak det ect i on syst em r equi r ement s f or such syst ems under t he COMPUTATI ONAL PI PELI NE MONI TORI NG SYSTEM par agr aph, and desi gn a syst em t hat meet s t he Subpar t K r egul at or y r equi r ed l eak r at e. I n or der t o do so t he speci f i cat i on wr i t er must consi der pi pe segment vol umes, i n conj unct i on wi t h t he speci f i ed achi evabl e l eak det ect i on r at e of t he equi pment .

Provide Leak Detection System associated with tanks less than or equal to 50,000 gallons that continuously and automatically monitors for piping leaks using an automatic line leak detector. Detect a minimum leak rate of

0.003 L/s at 69 kPa line pressure within 1 hour. Detect leaks against a minimum 1.8 m of head pressure. Detect leaks from any portion of the underground product piping.

2.3.4 Containment Sumps

NOTE: Pr ovi de l eak det ect i on syst em on sumps i f r equi r ed by t he appr oved SPCC pl an and/ or l ocal r egul at or y r equi r ement s. Sumps may used i n var i ous l ocat i ons ( e. g. , l ow dr ai n poi nt s, hi gh vent poi nt s, abovegr ound t o bel owgr ound pi pi ng t r ansi t i ons, under neat h f uel di spenser s, above UST manways, et c. ) .

Wi t hi n each sump, r equi r e l i qui d sensor s t o be i nst al l ed t o moni t or f or t he i nf l ux of l i qui ds ( f uel or wat er ) . Wher e doubl e- wal l pi pi ng i s used f or t he f uel di st r i but i on, s l ope t he pi pi ng appr opr i at el y f r om sump t o sump i n or der t o assur e i mmedi at e not i f i cat i on of any pi pi ng f ai l ur e.

Provide Leak Detection System on sumps that continuously and automatically monitors each containment sump [and dispenser sump] with an electronic capacitance type liquid sensor. Furnish sensor that detects liquids within a minimum of 25 mm above a sump's bottom. The leak detection system must be capable of triggering shutdown of the submersible turbine pump or the dispenser pump.

2.3.5 Monitoring Wells

NOTE: For wel l s wher e gr oundwat er coul d possi bl y come i n cont act wi t h t he sensor bei ng used, speci f y

SECTION 33 01 50.31 Page 11 a hydr ocar bon/ gr oundwat er t ype sensor . For l ocat i ons wher e gr oundwat er i s not a concer n, speci f y a vapor t ype sensor .

Continuously and automatically monitor each monitoring well with a [hydrocarbon/groundwater] [vapor] sensor. [Hydrocarbon/groundwater sensor must distinguish the difference between hydrocarbons and water while totally immersed in groundwater. Sense when the groundwater level has reached a minimum definable setpoint.] [Provide vapor sensor to detect vapors of the fuel to be handled as well as sense the presence of liquid.]

2.4 ELECTRONIC MONITORING/ALARM PANEL FOR PIPELINES ASSOCIATED WITH TANKS

GREATER THAN 50,000 GALLONS

NOTE: Use a s i ngl e panel t o moni t or al l appl i cabl e sensor s and det ect or s i f possi bl e. Del et e any of t he i t ems of t hi s par agr aph t hat ar e not appl i cabl e.

Perform continuous integrity checks on the status of each sensor's connections and wiring. Include a battery backup (rechargeable) that can operate the complete leak detection system during a power failure for a minimum period of 48 hours. Submit shop drawings of the panel layout along with panel mounting and support details. Provide panel that is compatible with and connected to the following:

a. Tank interstitial sensors and detectors.

b. Sump sensors and detectors.

c. Automatic line leak detectors.

d. Monitoring well sensors and detectors.

e. Digital tank gauge system as defined in Section 33 56 10

FACTORY-FABRICATED FUEL STORAGE TANKS.

2.4.1 Panel Housing

NOTE: Panel s l ocat ed out door s r equi r e NEMA 4 encl osur es. Panel s l ocat ed i ndoor s onl y r equi r e a st andar d i ndust r i al encl osur e. Expl osi on- pr oof encl osur es ar e cur r ent l y unavai l abl e.

Provide panel housing that is a [NEMA 4 rated enclosure in accordance with NEMA 250] [standard industrial enclosure]. Provide panel housing consisting of a hinged door to swing left or right (doors must not swing up or down).

2.4.2 Panel Alarms

NOTE: Del et e any of t he i t ems of t hi s par agr aph t hat ar e not appl i cabl e.

SECTION 33 01 50.31 Page 12

Account for the effects of thermal expansion or contraction of the fuel product, vapor pockets, tank or piping deformation, evaporation or condensation, as well as groundwater levels (if applicable) prior to initiating an alarm condition. Panel must produce an audible and visual alarm in the event any of the following occur.

a. Sensing of a hydrocarbon liquid from a sensor or detector.

b. Sensing of a hydrocarbon vapor from a sensor or detector.

c. Sensing of water from a sensor or detector.

d. Failure of an automatic line leak test.

e. Loss of pressure in positively pressurized tank interstitial.

f. Sensing a high or low liquid level in liquid-filled tank interstitial.

g. Sensing minimum groundwater setpoint.

h. Failure of any integrity check.

i. Sensing tank high, high-high, or low level alarm conditions.

2.4.2.1 Audible Alarm

NOTE: I f speaker s ext er nal t o t he panel ar e necessar y, i ndi cat e t hei r l ocat i on on t he dr awi ngs.

Panel must have [internal] [external] speakers that produce a buzzer sound of [70] [_____] decibels or greater in the event of a detected alarm condition. The audible alarm must be located in an area easily heard [in the control room] [near the dispensers] [near the pumps] in the event of an alarm condition.

2.4.2.2 Visual Alarm

Provide a visual alarm that illuminates in the event of a detected alarm condition. Include either individual lights for each alarm condition or include a single light and a liquid crystal display (LCD) panel that displaces information regarding each alarm condition. The visual alarm must be located in an area where it can be seen [in the control room] [near the dispensers] [near the pumps] when illuminated in the event of an alarm condition.

2.4.3 Acknowledge Switch

Provide panel with a manual acknowledge switch that will deactivate the audible alarm. Do not deactivate subsequent audible alarms unless depressed manually again for each occurrence. Do not extinguish the visual alarms until the alarm condition has been corrected. Switches must be an integral component located on the front panel and be either a key switch or push button.

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2.5 COMPUTATIONAL PIPELINE MONITORING SYSTEM

NOTE: EPA est abl i shed mi ni mum det ect abl e l eak r at es f or UST syst ems wi t h f i el d- const r uct ed t anks and ai r por t hydr ant syst ems i n 40 CFR 280 Subpar t K.

Speci f i cat i on wr i t er must consi der pi pe segment vol umes, i n conj unct i on wi t h t he speci f i ed achi evabl e l eak det ect i on r at e of t he equi pment , i n or der t o desi gn a syst em t hat meet s t he r egul at or y r equi r ed l eak r at e. Addi t i onal appl i cabl e r equi r ement s f or l ar ge f uel di st r i but i on appl i cat i ons ar e i n 49 CFR 195.

Pi pel i ne syst ems must be desi gned so t hat t hey can meet t he r egul at or y r equi r ed mi ni mum det ect abl e l eak r at es i n 40 CFR 280 Subpar t K. Thi s means t he desi gner must consi der pi pe segment vol umes i n coor di nat i on wi t h avai l abl e l eak det ect i on equi pment , and must i nst al l pr oper i sol at i on val ves, hi gh poi nt vent s / l ow poi nt dr ai ns, and pr essur e r el i ef val ves. The i nst al l of a per manent l eak det ect i on syst em ver sus t he use of por t abl e vendor equi pment t o conduct l eak det ect i on t est s i s at t he di scr et i on of t he Usi ng Agency. The desi gner shoul d consi der t he l i f e cycl e cost of a per manent i nst al l ed l eak det ect i on syst em ver sus t he cost of t est i ng syst ems usi ng por t abl e vendor pr ovi ded equi pment , i n or der t o det er mi ne i f t he i nst al l at i on of a per manent syst em makes sense. The use of por t abl e vendor pr ovi ded equi pment i s of t en cheaper .

CPM syst em can be per manent l y mount ed or can be conf i gur ed t o be por t abl e. For per manent l y mount ed syst ems, i ndi cat ed t he l ocat i on of t he syst em on t he dr awi ngs. For por t abl e syst ems, i ndi cat e t he pi pi ng connect i on poi nt ( s) on t he dr awi ngs.

Provide CPM system conforming to API RP 1130 . Detect leaks as small as

0.004 percent of the pipeline volume within 1 hour. Account for thermal effects on the piping and fuel. System must be compatible with the fuel to be handled. [Permanently mount system where indicated.][Provide as a complete, portable system.]

2.6 FINISHES

2.6.1 Factory Coating

NOTE: For al l Navy pr oj ect s ( r egar dl ess of l ocat i on) , t he 500 hour sal t spr ay t est i s r equi r ed and must be speci f i ed.

For Ar my pr oj ect s, a sal t spr ay t est i s opt i onal .

The 125 hour t est i s suggest ed f or mi l d or noncor r osi ve envi r onment s. The 500 hour t est i s suggest ed f or ext r emel y cor r osi ve envi r onment s.

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Unless otherwise specified, provide equipment and components fabricated from ferrous metal with the manufacturer's standard factory finish.[ Each factory finish must be capable of withstanding [125][500] hours exposure to the salt spray test specified in ASTM B117. For test acceptance, the test specimen must show no signs of blistering, wrinkling, cracking, or loss of adhesion and no sign of rust creepage beyond 3 mm on either side of the scratch mark immediately after completion of the test.] For equipment and component surfaces subject to temperatures above 50 degrees C , appropriately design the factory coating for the temperature service.

2.6.2 Field Painting

Field paint surfaces not otherwise specified as specified in [Section 09 97 13.27 HIGH PERFORMANCE COATING FOR STEEL STRUCTURES][Section 09 90 00 PAINTING, GENERAL]. Do not paint stainless steel and aluminum surfaces.

Do not coat equipment or components provided with a complete factory coating. Prior to any field painting, clean surfaces to remove dust, dirt, rust, oil, and grease.

PART 3 EXECUTION

3.1 INSTALLATION

NOTE: Dur i ng desi gn, l ayout equi pment and component s t o al l ow adequat e access f or r out i ne mai nt enance. Do not r el y sol el y on t he Cont r act or t o make t hese j udgment s. Show access door s wher e appl i cabl e f or mai nt enance.

Install parts requiring periodic inspection, operation, maintenance, and repair in locations that allow ready access. Install leak detection system and components in accordance with manufacturer's installation instructions.

3.1.1 Storage Tank Sensors/Detectors

Install interstitial tank sensors and detectors at the tank's low end.

Install sensors in accordance with the tank manufacturer's recommendations and do not compromise the tank's secondary containment in any manner.

Provide sensors that are easily removed from a tank. Connect metal conduit to steel tanks with dielectric fittings.

3.1.2 Automatic Line Leak Detector

Install detector on discharge side of each submersible pump in accordance with the pump and detector manufacturer's recommendations.

3.1.3 Sensors in Sumps

Install sensors in the low point of a sump in accordance with sump and sensor manufacturer's recommendations.

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3.2 FIELD QUALITY CONTROL

3.2.1 Leak Detection System Test

Activate and test the entire leak detection system in accordance with manufacturer's testing procedures. Use the electronic monitoring/alarm panel to record and present the results.

3.2.2 Storage Tank Tightness Tests

For tanks less than or equal to 50,000 gallons, storage tank tightness tests must be performed in accordance with Section 33 56 10 FACTORY-FABRICATED FUEL STORAGE TANKS. Use the electronic monitoring/alarm panel to record and present the results.

For tanks greater than 50,000 gallons, storage tank tightness test must be performed with a system that is certified to be able to detect leaks at no more than 0.5 gallons per hour.

3.2.3 Tank Fill Tests

Perform high liquid level alarm tests on storage tanks in accordance with Section 33 56 10 FACTORY-FABRICATED FUEL STORAGE TANKS. Use the electronic monitoring/alarm panel to record and present the results.

3.3 DEMONSTRATIONS

Conduct a training session for designated Government personnel in the operation and maintenance procedures related to the equipment/systems specified herein. Include pertinent safety operational procedures in the session as well as physical demonstrations of the routine maintenance operations. Furnish instructors who are familiar with the installation/equipment/systems, both operational and practical theories, and associated routine maintenance procedures. The training session must consist of a total of 4 hours of normal working time and must start after the system is functionally completed, but prior to final system acceptance. Submit a letter, at least 14 working days prior to the proposed training date, scheduling a proposed date for conducting the onsite training.

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