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Rxarvrendcd Pracw kr theTesrkg arAVeiArarion of Spi3O"AL leak Direction and Secondary Comaiunert Equipment at UST Farlitks PEURN1200-17.
<br /> 8.3 Sensor Functionality Testing. tial space, an alum condition is triggered and the
<br /> Verify that the console has no active or appropriate response is observed.
<br /> reaming history of leak detection-related I 8.31 General- Sensor functionality tests aro
<br /> warnings or alarms. In the event of any used to confirm the operation of the liquid detect- 8.3.4 Test Equipment. Test equipment shall
<br /> such warnings or alarm, notify the appro- Ing sensors that are looted in the interstitial spaces include:
<br /> price person before continuing the test Iof UST systems. Season that detectEMPIesuKe of a wt container toimmerse the sensor,
<br /> liquid am placed at the lowest point of the contain-
<br /> Where possible print out the system setup meet see that any release that draim dews will be a wale.;
<br /> and any alum histories from (he console. detected. Discriminating sensors an identify the • product Bf appropriate).
<br /> Save the printout for facility records or presence of liquid product m water. Non-discrimt-
<br /> mate an electronic copy. naring sensors un only determine the presence of 8.3.6 Preparation. Review the sensor manes-
<br /> 8.23.6 lest Equipment Tut equip• liquid—product or waw--but cannot discriminate facturei s litenmrc for testing guidelines. Use the
<br /> mem shall include. between the two. Seasonre aconnected to the leak- manufacturer's guidelines if they differ from the
<br /> monitoring console, which provides a warning if procedures in this section
<br /> • tools for the removalof the ATG probe liquid is district. Sensor and cosmic features may
<br /> and secants; vary among manufacture". NOTE Some sensors me programmed at have
<br /> pind• a number of a
<br /> tape measure or gauge stick; There re s of senors in use in alum a shutdown when the sensor gots that
<br /> types alarm mode. For these systems, ensue that
<br /> water-F ding parte. the field, including float switches, optical sectors, the dispensing system shuts down when the
<br /> presnuHvact u n monitoring devices and electrical sento. alaarrhs
<br /> 8.2L8 Test Procedure, resistance sensors. The most common sensor type -
<br /> L Measure the product and weld. level in use is a float switch. Consequently, the test pro- Verify that the console has no active or mounting
<br /> tithe link and compareto the console cedure in this section is for the float switch type. history of leak sensor warnings or alarm. In the
<br /> readings m eoefirm ATG accuracy. If
<br /> other typo of lemon, consult the manufu- event of any such warning m alarms, ratify Use
<br /> the readings do axe contact the turer's tut ploneduw. The information presented
<br /> g gra, FIGURE e-ca careful
<br /> t amid damntl replacing the ATG appropriate person before continuing with the test,
<br /> Appropriate parson. probe, be urefx m amid damaging any of the compo- shem should pros nm s a d retic sensor manufacturtn'
<br /> cents. testing procedures and requirements. Verity rat the console that the sensor alarm circuit
<br /> 2 Remove the ATO probe up and Is operational.
<br /> disconnect the cable from the ATG. 8,3.2 Purpose. The purpose of the ten is to
<br /> 9. Clear the alum conditions. determine if a armor can detect the presence of If the console is equipped with a printer, print out
<br /> 3. Remove tbaATG probe form the tank 10. For the water float, slowly move the liquid and is properly positioned. It can be used for the system status, sensor figuration and any
<br /> Use are to mm that the floats on float up the probe until the water either discriminating or non-discriminating leo- alarm histodes from the console. Save the printout
<br /> the stem do not catch on the bottom alarm is triggered 10111, fm facility records.
<br /> of the riser during removal.
<br /> 4. Inspcl the probe The flats must SL Measure the distance from the bottom 8,3.3 Description of Test. The liquid detadng Carefully remove the sensor nom the containment
<br /> move freely on the stem without of the probe to the water float when sensor is removed from the ink or piping intersti- arca. This may produce an alamh on the console
<br /> binding. IF any P are damaged the float first triggers thewateralarm. indicating that the sensor is no longer properly
<br /> or missing, comad the appropriate 12, Compathe measurements; for prod- t R, - y:- • ' ppositioned.positioned.re
<br /> person. net float and the water float in Steps 8 s 1 ' Inspect the sensor for damage. Refer to the
<br /> and I l at the values programmed inns
<br /> 6. Reconnect rise probe cablA -
<br /> thecoto the
<br /> manxaaurer's literature for Information about
<br /> 8. Set the fuel float in the middle of the hew in identify damage to the sensor housing and
<br /> probe and verify that it is showing the 8.2L7 Pass/Fall Criteria. If the mea- the cable. If it is damaged, notify the appropriate
<br /> coned inch reading on the console. remnants for the product and water float P�
<br /> match the values programmed in the con-
<br /> 7, Slowly move the fuel fiat up the sole and the console acknowledges the 8.3.6 Test Procedure.
<br /> probe until the high product alarm is high product and water level slams, the L Feil the test container with the appropriate
<br /> triggered on the console. If the systemATG probe passes the test liquid.
<br /> does act alum at the Pot-set level,
<br /> coned the appropriate Perim. If the measurements for the product and 2 Place the seism into the liquid in the operating
<br /> water forts do not match the values pro- I position. The alarm should be triggered.
<br /> e. Measures (be distinct form the bottom gemmed in the console or the console —.ion - - 3. Verify the alarm condition end make sure
<br /> of the probe to the fuel float when the docs nen acknowledge the high product FIGURE 83. The sensor needs to be property MIL the :reser label is correctly identified on the
<br /> Bat fust triggers the high product or water level alarms, the ATGprobe fags Wnad to detect the presence of liquid In amps,
<br /> the WL
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<br /> Recommended Predicts for UleTesfing and verification efSpi3OsysW, leak Detection and Secondary Containment EqupmentatUSTFacides PEVRP1200-17
<br /> ----- hazardous it done improperly. To prevent
<br /> console. If the label is incomeM contact the 8.3.7 Paas/Fell Criteria- If a sensor triggers an 9a AUTOMATIC LINE LEAK unsafe conditions from developing, follow
<br /> appmpriate person. If no alarm is triggered, alarm when the alarm condition is simulated, and the safety precautions described in Seddon 3
<br /> remove is sense from the container, check the the sensor is correctly identified on the console, the DETECTORS and lakoutRagout procedures.
<br /> connections, allow the liquid to drain from the sensor passu the tut,
<br /> semor and f sme se it into the liquid again If Use ff the sensor dna not trigger an alarm when tm
<br /> hhe Automatic line leak detectors (AILD) am used with
<br /> senses is replaced, repeat the test procedure. submersible turbine pump (STP) systems to detect cata-
<br /> alum condition is simulated, the sensor falls the strophic leaks In prusurlmd product piping systems.
<br /> 4. Remove the seer from the test container and lest If the sector is not correctly identified on the
<br /> allow the liquid to drain to clear the abum If console, notify the appropriate person at obtain Automatic line Irak detected may he either mechanical
<br /> product is used m the tut liquid, follow the authmimtim m coned the sensor mcadficauun. wetatro3ln
<br /> manufacturer's instructions for cleaning the AIL.Ds mustbe able to detect a leak in aproduct line that
<br /> sector before it is replaced. 8.4 Diedminatinglianso s, Thefumedonalityofdis- is equivalent to 3 Spit at 10 psig. Therefam, the wtappa-
<br /> 6.Reinstall the sensor in the proper location and ruminating liquid sensors can be detemtined with the wt NLLD
<br /> method described in Section 8.3.6 and substituting the ems that l leak
<br /> th at at conduct this tut tans[ accurately
<br /> position. appmpdate product for water. simulate a leak by (s equivalent si 3 gph at or psig. This
<br /> 6. Clear the alarm condition on the console. If tc tat
<br /> until
<br /> adhering the sift of the is acct in the
<br /> vi with a ter, print the alum test appantio until the mapped flow tae is ecmay b .
<br /> equipped 1>� P report The calibration at rise teat apparatus leak orifice maybe
<br /> for facility records and indicate that a unser accomplished cirherwith orwithom the use cis pressure
<br /> fimcdonality wt was conducted. regulator The procedure for calibration with a pressure
<br /> 7. Dispose of pmductuntaminated water eocord- regulator is described in Section 9.1.6. The procedure
<br /> ing to the guidelines in Section 6.7, for calibration without the use of a pressure regulator FIGURE 91- The MLLD mounted on the submersible
<br /> is described in Sudan 9.2.6. Either procedure may be twbtne pump will resider flow when a leak is detected.
<br /> used to accomplish calibration of the wt apparatus leak
<br /> office' 8.1 Mechanical Una Leak Detectors (Mt1Ds).
<br /> NOTE: In order for a line leak detector to 9,L1 General. hfllDs arc co nnionly installed
<br /> function property, the STP most properly at the STP and ran &Acct a leek in product piping
<br /> cycle ontotf. Confirm that the STY properly between the hll T D and the solenoid valve Inside
<br /> cycles Orloff as it would during normal product dispenses. MlLDa restrict product flaw if
<br /> fueling operations and visually inspect the sleek is detected.
<br /> STP electrical relay switches (also known as
<br /> "comtactars') to ensure that the contacts am in Use this test procedure in conjunction with the
<br /> goad condition. If the contacts show visible MLLD manufacturer's Installation and matnte-
<br /> signsofeacessamingdamageorwur, notify aance instructions.
<br /> the appropriate person to obtain authorization
<br /> to mplace the defective relays. If the STP 9.12 Purpose. This tart method is used to
<br /> &nes not properly cycle onloff, the line leak determine if an NIILD Out detect a product lint
<br /> detector may not dated a leak from the pip- leak equivalent to 3 gph at 10 psig,
<br /> ing, and fails We test. 9.L3 Description of Test- A tut apparatus to
<br /> typically connected to the wt Pon of the shear
<br /> NOTE: Piping configurations with multiple valve inside a dispenser to simulate a leek in the
<br /> STPs and manifolded lines m those systems product line equivalent to 3 Spit at 10 psig. The
<br /> having mast"/satellite fuel dispensers must performance of the line leak detector is observed
<br /> be installed properly for automatic lime leak to are if it cora detect the simulated wk.
<br /> derectors to function conedly. Consult menu-
<br /> ' facturerilimramre regarding proper installs- 9.L4 Test Equipment. Tbst equipment shill
<br /> don and operation. include:
<br /> a wt apparatus that includes a preuure gauge
<br /> NOTE: 7lsting of ALLDs involves creating with a minimum range of 0fi0 psig, a Pressure
<br /> a simulated leak from the piping system and regulator and an adjustable ori thatcan simu-
<br /> activating the STP at specific timer to i w- lam a leak rate equivalent to 3 gph at 10 psig;
<br /> surize the system. These adivides can be
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