|
I . SCOPE
<br /> THIS SPECIFICATION COVERS GAS-FREEING, REMOVAL AND DISPOSAL OF UNDERGROUND TANKS 3. AFTER. PURGING THE TANK, BEGIN HIGH PRESSURE WATER RINSING THE TANK INTERIOR III, TANK DISPOSAL
<br /> AND BACKFILL OF TANK EXCAVATION - THIS SPECIFICATION SHALL SERVE AS A GUIDLINE - USING A MINIMUM OF 2.000 PSI AND DETERGENT (IF NECESSARY). LOOSE SCALE, SLUDGE
<br /> LOCAL CODES SHALL PREVAIL. AND RINSE WATER SHALL BE REMOVED BY THE VACUUM TRUCK. WHEN THE SLUDGE AND
<br /> OTHER DEBRIS HAS BEEN REMOVED AND THE READINGS PER 11 -0-5 ARE LESS THAN 10 A. JUNKING
<br /> il . GAS FRFF'ING AND TANK REMOVAL S PERCENT OF THE LOWER EXPLOSIVE LIMIT, THE WASHING MAY CEASE. ( MINIMUM OF 3
<br /> 1WASH CYCLES).
<br /> TANKS MUST BE GAS - FREED, CLEANED, AND DISPOSED OF IN STRICT ACCORDANCE WITH ALL a, RINSING THE TANK: REMOVE ALL POSSIBLE COMMODITY FROM THE TANK BY TANKS MAY BE HAULED TO AN ESTABLISHED PUBLIC DUMP OR JUNK PILE PROVIDED THEY ARE MUTILATED
<br /> LOCAL GOVERNMENTAL AGENCIES REGULATIONS. IT IS THE CONTRACTOR'S RESPONSIBILITY TO MEANS OF PUMP WITH SUCTION RESTING ON THE BOTTOM OF THE TANK. TO UN OCAIMABLE EXTENT TU. PREVENT RETRIEVAL FOR ANY PURPOSE. CONTRACTOR SHALL
<br /> BE FAMILIAR WITH ALL LOCAL REGULATIONS AS THEY APPLY TO THIS SCOPE OF WORK. IF THE PROVIDE UNNOCAL. REPRESENTATIVE WITH TANK DISPOSAL MANIFEST.
<br /> LOCAL AGENCIES DO NOT HAVE SPECIFIC REQUIREMENTS FOR TANK REMOVAL, THE FOLLOWING b. PLACE IN THE TANK THROUGH THE FILL OPENING, 10 GALLONS OF WATER PER 1 ,000 B. DISPOSAL PRECAUTIONS
<br /> SPECIFICATIONS MUST BE ADHERED TO GALLONS OF CAPACITY. PUMP OUT COMMODITY UNTIL SUCTION IS LOST. '
<br /> C. REPEAT STEP "a & b" TWICE. (TRIPLE RINSE) IF THE STEEL IS TO BE SOLD FOR SCRAP AND POSSIBLE REMELTING IN. THE MANUFACTURE OF NEW
<br /> A. SAFETY PRECAUTIONS STEEL, ALL INTERIOR SURFACE OF ANY PLATES WHICH HAVE BEEN IN CONTACT WITH SLUDGE
<br /> 4. WAIT ONE MINUTE OR LONGER AFTER STOPPING ANY PURGING, VACUUMING OR HIGH PRESSURE WATER SHOULD BE SANDBLASTED OR WIRE BRUSHED TO BARE METAL. -
<br /> 1 . PRIOR TO EXCAVATION, THE SITE SHALL BE SAFEGUARDED FROM ALL SOURCES OF RINSING OPERATION. CHECK THE TANK FOR AN EXPLOSIVE ATMOSPHERE PER 11-8-5. IF ALL
<br /> IGNITION FOR AN AREA OF 25 FEET (MIN) IN ALL DIRECTIONS. READINGS ARE LESS THAN 10 PERCENT OF THE LOWER EXPLOSIVE LIMIT, THEN THE TANK CAN
<br /> 2. SMOKING, USE OF OPEN FLAME, OR USE OF SPARK - PRODUCING TOOLS AND EQUIPMENT BE CONSIDERED PURGED OF FLAMMABLE VAPORS.
<br /> SHALL BE PROHIBITED IN OPEN TANK AREAS. 5, AFTER PURGING / CLEANING, PER 11-8-2 THROUGH 4, CHECK THE TANK FOR AN IV. BAC FILL OPERATIONS
<br /> 3. THE AREA ADJACENT TO THE EXCAVATION SHALL BE BARRICADED AGAINST THE ENTRANCE EXPLOSIVE ATMOSPHERE UTILIZING A CALIBRATED COMBUSTIBLE GAS INDICATOR. 1 . CLEAR EXCAVATION OF ALL LOOSE SOIL BEFORE PROCEEDING WITH BACKFILL
<br /> OF UNAUTHORIZED PERSONS. WARNING SIGNS READING "FLAMMABLE - NO SMOKING' SHALL A MINIMUM OF FOUR SETS OF CHECKS SHOULD BE MADE: ONE SET FOR THE UPPER
<br /> BE PROVIDED. EXPLOSIVE LIMIT AND ONE FOR LOWER EXPLOSIVE LIMIT (LEL). PLACE THE COMBUSTABLE GAS 2, IF TANKS ARE RELOCATED AND / OR FORMER LOCATION ABANDONED, CLEAN NATIVE SOIL
<br /> INDICATOR PROBE INTO THE FILL OPENING WITH THE FILL TUBE REMOVED. READINGS SHALL BE IS TO BE USED AS BACKFILL MATERIAL. FILL MUST BE PLACED IN LEVEL LOOSE LAYERS
<br /> TAKEN AT THE BOTTOM MIDDLE AND UPPER PORTION OF THE TANK, A
<br /> 4. TWO PORTABLE FIRE EXTINGUISHERS, EACH HAVING A MINIMUM RATING OF 20A 80 B:C, AND THE INSTRUMENT SHALL ABOUT SIX INCHES IN THICKNESS, MOISTENED NEAR OPTIMUM MOISTURE AND PROPERLY
<br /> SHALL BE PROVIDED ON SITE. ( OR AS REQUIRED BY LOCAL FIRE DEPT. ) BE PURGED WITH FRESH AIR AFTER EACH READING. READINGS OF 10% OF LEL OR LESS, COMPACTED. SUCCEEDING LAYERS OF FILL SHALL BE SIMILARLY PLACED AND COMPACTED
<br /> INDICATED IN THE TANK AND AT THE VENT RISER OR EDUCTOR, SHALL BE OBTAINED BEFORE
<br /> THE DURING THE PLACEMENT OF BACKFILL. THE UPPER PORTION OF THE EXCAVATION'S -
<br /> 5. COMMODITY, OR MIXTURE OF COMMODITY AND ANY FLUID SHALL NOT BE DRAINED INTO A TANK IS SAFE FOR OPENING. . SIDEWALLS SHALL BE BROKEN DOWN (BENCHED) TO PROVIDE A TRANSITION BETWEEN
<br /> STREET, GUTTER, SEWER OR TANK EXCAVATION. - THE COMPACTED FILL AND ADJOINING GROUND. A GRADING PERMIT AND INSPECTION MAY ¢'
<br /> 6. GUESS TEST THE ATMOSPHERE OF THE TANK FOR EXPLOSIVE RANGE WITH A
<br /> a. PURGING. VACUUMING, AND HIGH PRESSURE WATER RINSING EQUIPMENT BE REQUIRED PER LOCAL AGENCY REQUIREMENTS.
<br /> ' FLAMMABLE 9,
<br /> ' LAM : SHALL BE BONDED AND GROUNDED TO PROVIDE A PATHWAY FOR - - ,
<br /> FMABLE VAPOR INDICATOR" WHICH SHALL READ 0. 10 (10� OF THE LOWER EXPLOSIVE DISSIPATION OF ACCUMULATED STATIC CHARGES. METAL UNDERGROUND 3. IF ASPHALT PAVEMENT IS NOT TO BE REPLACED, THE EXCAVATED AREA SHALL BE
<br /> LIMIT) OR LOWER. SEE PARAGRAPH II-8-5. TANKS SHALL BE BONDED TO THE. ABOVE DESCRIBED EQUIPMENT. WHEN SMOOTHLY GRADED TO PROVIDE A CLEAN EVEN SURFACE. ALL EXCESS MATERIALS SHALL
<br /> WORKING WITH FIBERGLASS TANKS, THE EQUIPMENT SHALL BE GROUNDED BE REMOVED AND THE AREA SHALL BE LEFT IN A RAKE CLEAN CONDITION.
<br /> 7. IT IS MANDATORY THAT A PROPERLY CALIBRATED FLAMMABLE VAPOR AND OXYGEN
<br /> INDICATOR BE ON THE JOB SITE FROM START TO FINISH. AND BONDED. GROUNDED METAL RODS MEETING MINIMUM REQUIREMENTS '
<br /> SHALL APPLY TO BONDING AND GROUNDING DEVICES. 4. IF ASPHALT PAVEMENT IS TO BE REPLACED, BACKFILL SHALL BE PLACED AND COMPACTED .
<br /> TO SUB-GRADE ELEVATION AFTER WHICH PAVING SECTION SHALL BE INSTALLED. PROVIDE
<br /> 8. CAL / O.S.H.A. AND FEDERAL O.S.H.A. REGULATIONS SHALL BE ADHERED TO IN ALL FACETS 1) BONDING AND GROUNDING DEVICES SHALL BE STRANDED WIRE NOT A NEAT AND SMOOTH TRANSITION WITH EXISTING PAVEMENT SURFACES. AREA SHALL
<br /> OF THIS PROJECT. BE PROPERLY BROOM CLEANED UPON COMPLETIQN. -
<br /> SMALLER THAN 8 AWG (AMERICAN WIRE GAUGE) WITH APPROPRIATE
<br /> 9. CONTRACTOR SHALL LOCKOUT / TAGOUT ALL ELECTRICAL PER LOCAL OSHA REQUIREMENTS. CONNECTIONS AT EACH END:
<br /> 5. CONTRACTOR SHALL FURNISH CERTIFIED COMPACTION REPORT FROM AN APPROVED SOILS
<br /> 11) A SECURE METAL TO METAL CONTACT SHALL BE MADE BETWEEN LABORATORY ACKNOWLEDGING THAT A MINIMUM OF 907 OF MAXIMUM DENSITY PER
<br /> THE TANK AND EQUIPMENT OR THE EQUIPMENT AND GROUND. ASTM STANDARD D1557 HAS BEEN OBTAINED. TWO COPIES OF THE COMPACTION REPORT
<br /> B . PROCEDURE FOR TANK CLEANING PRIOR TO REMOVAL SHALL BE FORWARDED TO UNOCAL
<br /> 1 . UNDERGROUND TANKS SHALL BE CLEANED AND DEGASSED PRIOR TO 111) WHEN GROUNDING EQUIPMENT, SECURE THE END OF THETO
<br /> REMOVAL USING, AT A MINIMUM, THE FOLLOWING STANDARD PROCEDURE GROUNDING DEVICE THAT IS NOT ATTACHED TO THE EQUIPMENT
<br /> AN ADEQUATE GROUND, I.E., METAL WATER PIPE, METAL DRAINAGE,
<br /> a. ENSURE THAT THE PROCESS USED MEETS ALL AIR QUALITY AUTHORITIES AND OR SEWER PIPE, WHICH ORIGINATES OR TERMINATES IN THE SOIL.
<br /> A GROUND AS DESCRIBED ABOVE NOT AVAILABLE, A METAL ROD
<br /> LOCAL CODE REGULATIONS. D N
<br /> DRIVEN INTO THE SOIL TO A DEPTH NO LESS THAN 3 FEET SHALL
<br /> b. PRIOR TO ANY WORK ON SITE. CONTRACTOR SHALL PROVIDE UNOCAL WITH THEIR SERVE AS A GROUND. d
<br /> STATE HAZARDOUS WASTE CERTIFICATION AND THE NAMES OF EMPLOYEES WHO b. THE BONDING AND GROUNDING DEVICE SHALL BE CONNECTED TO
<br /> HAVE PASSED THE TEST. THE FOLLOWING EQUIPMENT AS DESCRIBED !!!
<br /> c. PRIOR TO EXCAVATION, CONTRACTOR SHALL OBTAIN AND PAY FOR ALL NECESSARY �!
<br /> PERMITS AND LICENSES THAT MAY BE REQUIRED TO PERFORM THIS WORK, UNLESS 1) PURGING EQUIPMENT - CONNECT THE DEVICE TO THE
<br /> ASSIGNED TO OTHERS. APPLIANCE WHERE THE AIR IS DISCHARGED, 1.E., AT THE
<br /> VENTURI CONE.
<br /> d. CONTRACTOR SHALL NOTIFY FIRE DEPARTMENTAND / OR ANY OTHER GOVERNMENTAL
<br /> INSPECTORS HAVING JURISDICTION SUFFICIENTLY IN ADVANCE OF PROCEEDING WITH 11) VACUUMING EQUIPMENT - THE DEVICE SHALL BE
<br /> TANK ABANDONMENT. OBTAIN PROPER CLEARANCE TO PROCEED WITH WORK. AND CONNECTED TO THE EQUIPMENT WHERE THE LIQUID IS
<br /> ARRANGE FOR REQUIRED INSPECTIONS. _ BEING DISCHARGED, I.E., THE VACUUM TRUCK.
<br /> e. CONFIRM THAT ALL OF THE TANK'S PRODUCT HAS BEEN REMOVED (SCHEDULED BY 111) HIGH PRESSURE WATER RINSING EQUIPMENT - THE DEVICE
<br /> UNOCAL'S REPRESENTATIVE). SHALL BE CONNECTED TO THE APPLIANCE WHERE THE
<br /> NOTE: CONTRACTOR MAY PUMP A SMALL AMOUNT OF WATER INTO THE TANK. TO FLOAT WATER IS BEING DISCHARGED, I.E., THE WAND OR NOZZLE.
<br /> THE PRODUCT FROM LOW SPOTS WHERE IT CAN BE PUMPED . FROM THE TANK. THE
<br /> MAXIMUM AMOUNT OF WATER SHALL BE 125 GALLONS. c. IF NON - METALLIC PURGING, VACUUMING, OR HIGH PRESSURE WATER
<br /> RINSING EQUIPMENT, SUCH AS PVC PIPE, IS USED. THEN AN 8 AWG
<br /> f. CONTRACTOR SHALL REMOVE AND HANDLE ALL RESIDUAL LIQUID, SOLIDS, OR WIRE MUST RUN INSIDE THE ENTIRE LENGTH OF THE NON - METALLIC
<br /> SLUDGES PURSUANT TO THE APPLICABLE PROVISIONS OF CHAPTERS 6.5 AND 6.7 EQUIPMENT, AND THIS WIRE MUST-. BE BONDED TO THE TANK AND
<br /> OF DIVISION 20 OF THE HEALTH AND SAFETY- CODE AND LOCAL AGENCY CODES. ASSOCIATED EQUIPMENT.
<br /> THIS INVOLVES DISCHARGING THE PETROLEUM RESIDUALS INTO APPROVED CONTAINERS
<br /> AND TRANSPORTING THEM TO AN APPROPRIATE. RECLAIMING, RECYCLING OR 6. AFTER TRIPLE RINSING, COMPLETE THE ..TANK EXCAVATION.
<br /> TREATMENT / STORAGE / DISPOSAL (TSD) FACILITY BY A LICENSED HAZARDOUS
<br /> WASTE TRANSPORTER OR LICENSED HAULER SUBJECT TO ALL APPLICABLE GOVERNMENT '
<br /> REGULATIONS AND ALL LOCAL AGENCIES AS REQUIRED. 7. RAISE THE ENO OF THE TANK- TO DRAIN REMAINING LIQUID TO THE OTHER END PRIOR TO REMOVING
<br /> THE TANK FROM THE EXCAVATION. REMOVE THE PLUG FROM FILL OPENINGS AND WITH MAXIMUM
<br /> g. CONTRACTOR SHALL SAW CUT ASPHALT PAVEMENT, IF NECESSARY, TO MINIMIZE AVAILABLE WATER PRESSURE HOSE STREAM. THOROUGHLY FLUSH THE ENTIRE INTERIOR TO WASH
<br /> AMOUNT OF ASPHALT REMOVAL WORK TO ACCOMMODATE TANK REMOVAL. IF LOT DOWN REMAINING COMMODITY, SLUDGE AND LOOSE MATERIAL.
<br /> IS TO BE COMPLETLY STRIPPED OF ASHPALT PAVEMENT, DISREGARD SAW CUTTING
<br /> REQUIREMENT. THIS COMMODITY SHALL BE REMOVED BY PUMP WITH SUCTION RESTING AT LOW POINT
<br /> OF TANK. RETEST THE TANK ATMOSPHERE TO MAKE CERTAIN THE READINGS DO NOT EXCEED
<br /> h. CONTRACTOR SHALL BREAK OUT AND REMOVE ASPHALT PAVEMENT, CONCRETE 0. 10. IF READING GREATER THAN 0. 10 IS OBSERVED, INTRODUCE ADDITIONAL DRY ICE AS
<br /> j SLABS, ETC. AND DISPOSE OF IN A LAWFUL MANNER 1N AN APPROVED DISPOSAL AREA. -INDICATED IN PARAGRAPH II-B-2-a. -
<br /> v
<br /> I. EXPOSE TOP OF TANK AND ASSOCIATED UNDERGROUND PIPING. BLOW BACK AND 8. THE TANK AND PIPES SHALL BE CLEAN BEFORE REMOVAL FROM THE SITE. ALL
<br /> FLUSH PRODUCT LINES INTO TANK. WARNING - AFTER ANY OPERATION INVOLVING TANK IDENTIFICATION SHALL REMAIN ON THE TANK. DO NOT REMOVE THE UNDERWRITERS
<br /> FLOW OF AIR, WATER, OR PRODUCT INTO OR OUT OF THE TANK, WAIT lA MINIMUM OF LABORATORY TAG OR ANY OTHER. IDENTIFICATION FROM THE TANK, UNLESS REQUIRED BY THE
<br /> ONE MINUTE AFTER FLOW STOPPAGE BEFORE INSERTING ANY OBJECT INTO THE THE LOCAL AGENCY. REMOVE THE CLEANSED TANK FROM THE EXCAVATION. LOAD AND }
<br /> TANK. SECURE THE TANK ON AN APPROPRIATE TRANSPORTING VEHICLE INSURING PROPER
<br /> DOCUMENTATION IS CQMPLETED AND REMOVE TANK FROM THE PREMISES. '•. g
<br /> (. ISOLATE AND DISCONNECT ELECTRICAL LINES, PRODUCT PIPING AND ASSOCIATED d
<br /> ATTACHMENTS. ALLOW CONTENTS IN PIPING TO DRAIN INTO TANKS BEFORE DISCONNECTING. 9. AFTER APPROVAL OF FIRE INSPECTOR HAS BEEN OBTAINED, CONTRACTOR SHALL COMPLETE
<br /> DRAINING CONTENTS INTO TANK EXCAVATION OR SURROUNDING SOIL IS UNACCEPTABLE. REMOVAL OF UNDERGROUND TANKS. TANKS SHALL BE REMOVED WITH A CRANE ONLY.
<br /> IMMEDIATELY CAP ALL UNUSED OPENINGS. EXCEPT FOR REQUIRED VENTING, ALL FILL AND CRANE SHOULD BE ADEQUATELY SIZED TO ACCOMMODATE TANK SIZES SPECIFIED ON THE
<br /> ACCESS LOCATIONS AND PIPING MUST BE SEALED UTILIZING STEEL PIPE PLUGS. A TEMPORARY GENERAL ARRANGEMENT DRAWING AND WEIGHTS GIVEN IN DRAWING J- 1 AND J-5.
<br /> VENT MAY BE INSTALLED AND USED DURING THE CLEANING PROCESS IN LIEU OF LEAVING
<br /> THE VENT PIPING INTACT.
<br /> 10. CONTRACTOR SHALL HAUL TANKS AWAY FROM PREMISES IMMEDIATELY AFTER TANK REMOVAL
<br /> k. CONTRACTOR SHALL DRAIN ALL PRODUCTS FROM DISPENSERS INTO AN APPROVED CONTAINER FROM EXCAVATED AREA.
<br /> BEFORE REMOVING DISPENSERS FROM PUMP ISLAND.
<br /> 11 . CONTRACTOR SHALL RECORD TANK NUMBERS AND FURNISH THEM TO FIRE DEPARTMENT INSPECTOR
<br /> AND UNOCAL ENGINEER.
<br /> 2. ONLY ONE OF THE TWO FOLLOWING METHODS SHALL BE USED FOR PURGING THE TANK ATMOSPHERE. - - -
<br /> CONTINUE THE SELECTED PURGING OPERATION UNTIL THE ATMOSPHERE WITHIN. THE TANK TESTED 12. CONTRACTOR SHALL IMMEDIATELY NOTIFY THE UNOCAL REPRESENTATIVE IN THE EVENT THAT
<br /> WITH A "FLAMMABLE VAPOR INDICATOR" WILL READ 0. 10 (107 OF THE LOWER EXPLOSIVE LIMIT) SOIL CONTAMINATION IS ENCOUNTERED IN THE EXCAVATED AREA.
<br /> OR LOWER OR AS REQUIRED BY THE LOCAL AGENCY. TANKS SHALL NOT BE REMOVED FROM THE
<br /> GROUND UNTIL THIS LEVEL IS ACHIEVED. -
<br /> Lhs /eav
<br /> a. CO2 DRY ICE METHOD: FOR EACH 1 , 000 GALLONS OF TANK CAPACITY, AI IM -.
<br /> OF CO ( BASED ON LOCAL ORDINANCES), IN THE FORM OF DRY ICE, SHALL BE PLACE
<br /> G HE FILL OPENING.
<br /> CAUTION FOR THE FOLLOWING PROCEDURE, A GROUNDED DISCHARGING DEVICE MUST BE
<br /> USED TO DISSIPATE STATIC ELECTRIC CHARGES. SEE 11-8-5-a, b , AND C. -
<br /> b. .DEGASSING METHOD : DEGASSING SHALL BE PER LOCAL AGENCY REQUIREMENTS.
<br /> ONLY LOCAL AGENCY APPROVED DEGASSING EQUIPMENT SHALL BE USED. THIS
<br /> EQUIPMENT IS THREADED ON TO THE FUEL 'TANKS.
<br /> -._-
<br /> DESiR4Y ALL FAMiS REV. CKP� APED --- --
<br /> © UNION OIL OF CALIFORNIA, dba UNOCAL, 994 REV DATE REVISED . 8MND EMUER DIE BY BY BY y1EESrONE APPROVAL RECORD �RDYA APPROVALS
<br /> [FAWN er TAIT
<br /> ISSUED FOR C.U.P. UNDERGROUND STORAGE (ANK
<br /> THIS PROPRIIECUMENT ETARY TOAND THE UNIION OIL OFRMATION CALIFORNAN(UNODHEREIN .IS CAL) AND SSUED FOR PLAN CHECK EECKEDe WD _ (REN EKIN
<br /> GEERINaWWM) DATE REMOVAL AND DISPOSAL SPECIFICATIONS f'
<br /> BEEN FURNISHED IN CONFIDENCE AND ARE SUBJECT 0 TF{E APPRO+G
<br /> TERMS OF A SEPARATE SECRECY AGREEMENT BETWEEN UNOCAL ISSUED FOR GEN. 'DID 5/gI47 IkMM
<br /> AND THE RECIPIENT. THE RECIPIENT IS NOT TO COPY, DUPLICATE mss DAT TDRAWNC NO REV Fa:
<br /> DATE
<br /> SHEET
<br /> OR DISCLOSE THE CONTENTS TO ANY PERSON OR ENTITY EXCEPT ISSUED FOR CONSTRUCT. pp�pUCrs COMPANY
<br /> AS EXPRESSLY AUTHORIZED BY SAID AGREEMENT OR BY UNOCAL +/ rcEts
<br /> IN WRITING. RECORD 6RANiNG VALE NONE can ocna+ N w xlD w of -aa r
<br /> A B p E F ,DwE,S�SID-J o
<br />
|