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D E F
<br /> 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
<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 III • TANK DISPOSAL
<br /> LOCAL CODES SHALL PREVAIL. AND RINSE WATER SHALL BE REMOVED BY THE VACUUM TRUCK. WHEN THE SLUDGE AND
<br /> II . GAS FREEING AND TANK REMOVALPERCENT OFI THEA LOW RN EXPLOSIVE LOTHER REMOVED IIMIT, HE WASHINGD THE READINGSPER MAYI CEASE. (RMINLESS
<br /> MUMTOFN310 A. JUNKING
<br /> 1
<br /> TANKS MUST BE GAS - FREED, CLEANED, AND DISPOSED OF IN STRICT ACCORDANCE WITH ALL WASH CYCLES).
<br /> LOCAL GOVERNMENTAL AGENCIES REGULATIONS. IT IS THE CONTRACTOR'S RESPONSIBILITY TO 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 /> BE FAMILIAR WITH ALL LOCAL REGULATIONS AS THEY APPLY TO THIS SCOPE OF WORK. IF THE MEANS OF PUMP WITH SUCTION RESTING ON THE BOTTOM OF THE TANK. TO AN UNRECLAIMABLE EXTENT TO PREVENT RETRIEVAL FOR ANY PURPOSE. CONTRACTOR SHALL
<br /> LOCAL AGENCIES DO NOT HAVE SPECIFIC REQUIREMENTS FOR TANK REMOVAL, THE FOLLOWING
<br /> SPECIFICATIONS MUST BE ADHERED TO b. PLACE IN THE TANK THROUGH THE FILL OPENING, 10 GALLONS OF WATER PER 1 ,000 PROVIDE UNOCAL REPRESENTATIVE WITH TANK DISPOSAL MANIFEST.
<br /> GALLONS OF CAPACITY. PUMP OUT COMMODITY UNTIL SUCTION IS LOST. B. DISPOSAL PRECAUTIONS
<br /> A. SAFETY PRECAUTIONS 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 /> 4. WAIT ONE MINUTE OR LONGER AFTER STOPPING ANY PURGING, VACUUMING OR HIGH PRESSURE WATER STEEL, ALL INTERIOR SURFACE OF ANY PLATES WHICH HAVE BEEN IN CONTACT WITH SLUDGE
<br /> 1 . PRIOR TO EXCAVATION, THE SITE SHALL BE SAFEGUARDED FROM ALL SOURCES OF SHOULD ALL
<br /> SANDBLASTED OR WIRE BRUSHED TO BARE METAL.
<br /> IGNITION FOR AN AREA OF 25 FEET (MIN) IN ALL DIRECTIONS. RINSING OPERATION. CHECK THE TANK FOR AN EXPLOSIVE ATMOSPHERE PER II-B-5. IF ALL
<br /> 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.
<br /> 5. AFTER PURGING / CLEANING, PER II-B-2 THROUGH 4, CHECK THE TANK FOR AN I V• BACKFILL O P E hZATI O N S
<br /> 3. THE AREA ADJACENT TO THE EXCAVATION SHALL BE BARRICADED AGAINST THE ENTRANCE EXPLOSIVE ATMOSPHERE UTILIZING A CALIBRATED COMBUSTIBLE GAS INDICATOR.
<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 1 . CLEAR EXCAVATION OF ALL LOOSE SOIL BEFORE PROCEEDING WITH BACKFILL.
<br /> INDICATOR PROBE INTO THE FILL OPENING WITH THE FILL TUBE REMOVED. READINGS SHALL BE 2• IF TANKS ARE RELOCATED AND / OR FORMER LOCATION ABANDONED, CLEAN NATIVE SOIL
<br /> 4. TWO PORTABLE FIRE EXTINGUISHERS, EACH HAVING A MINIMUM RATING OF 20A 80 B:C, TAKEN AT THE BOTTOM , MIDDLE AND UPPER PORTION OF THE TANK, AND THE INSTRUMENT SHALL IS TO BE USED AS BACKFILL MATERIAL. FILL MUST BE PLACED IN LEVEL LOOSE LAYERS
<br /> SHALL BE PROVIDED ON SITE. ( OR AS REQUIRED BY LOCAL FIRE DEPT. ) BE PURGED WITH FRESH AIR AFTER EACH READING. READINGS OF 107. OF LEL OR LESS, AS ABOUT SIX INCHES IN THICKNESS, MOISTENED NEAR OPTIMUM MOISTURE AND PROPERLY
<br /> INDICATED IN THE TANK AND AT THE VENT RISER OR EDUCTOR, SHALL BE .OBTAINED BEFORE THE COMPACTED. SUCCEEDING LAYERS OF FILL SHALL BE SIMILARLY PLACED AND COMPACTED
<br /> 5. COMMODITY, OR MIXTURE OF COMMODITY AND ANY FLUID SHALL NOT BE DRAINED INTO A TANK IS SAFE FOR OPENING. DURING THE PLACEMENT OF BACKFILL. THE UPPER PORTION OF THE EXCAVATION'S
<br /> STREET, GUTTER, SEWER OR TANK EXCAVATION. SIDEWALLS SHALL BE BROKEN DOWN (BENCHED) TO PROVIDE A TRANSITION BETWEEN
<br /> 6. �ON'T GUESS TEST THE ATMOSPHERE OF THE TANK FOR EXPLOSIVE RANGE WITH A a. PURGING, VACUUMING, AND HIGH PRESSURE WATER RINSING EQUIPMENT THE COMPACTED FILL AND ADJOINING GROUND. A GRADING PERMIT AND INSPECTION MAY
<br /> FLAMMABLE VAPOR INDICATOR" WHICH SHALL READ 0. 10 (10% OF THE LOWER EXPLOSIVE SHALL BE BONDED AND GROUNDED TO PROVIDE A PATHWAY FOR BE REQUIRED PER LOCAL AGENCY REQUIREMENTS.
<br /> LIMIT) OR LOWER. SEE PARAGRAPH II-B-5. DISSIPATION OF ACCUMULATED STATIC CHARGES. METAL UNDERGROUND 3. IF ASPHALT PAVEMENT IS NOT TO BE REPLACED, THE EXCAVATED AREA SHALL BE
<br /> TANKS SHALL BE BONDED TT THE ABOVE DESCRIBED EQUIPMENT. WHEN SMOOTHLY GRADED TO PROVIDE A CLEAN EVEN SURFACE. ALL EXCESS MATERIALS SHALL
<br /> 7. IT IS MANDATORY THAT A PROPERLY CALIBRATED FLAMMABLE VAPOR AND OXYGEN WORKING WITH FIBERGLASS TANKS, THE EQUIPMENT SHALL BE GROUNDED BE REMOVED AND THE AREA SHALL BE LEFT IN A RAKE CLEAN CONDITION.
<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 DEVICESIF ASPHALT PAVEMENT IS TO BE REPLACED, BACKFILL SHALL BE PLACED AND COMPACTED
<br /> OF THIS PROJECT.
<br /> 8. CAL / O.S.H.A. AND FEDERAL O.S.H.A. REGULATIONS SHALL 8E ADHERED TO IN ALL FACETS . 4. TO SUB-GRADE ELEVATION AFTER WHICH PAVING SECTION SHALL BE INSTALLED. PROVIDE
<br /> 1) BONDING AND GROUNDING DEVICES SHALL BE STRANDED WIRE NOT A NEAT AND SMOOTH TRANSITION WITH EXISTING PAVEMENT SURFACES. AREA SHALL
<br /> 9. CONTRACTOR SHALL LOCKOUT SMALLER THAN 8 AWG (AMERICAN WIRE GAUGE) WITH APPROPRIATE
<br /> / TAGOUT ALL ELECTRICAL PER LOCAL OSHA REQUIREMENTS. CONNECTIONS AT EACH END. BE PROPERLY BROOM CLEANED UPON COMPLETION.
<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 90% OF MAXIMUM DENSITY PER
<br /> B . PROCEDURE FOR TANK CLEANING PRIOR TO REMOVAL THE TANK AND EQUIPMENT OR THE EQUIPMENT AND GROUND. ASTM STANDARD D1557 HAS BEEN OBTAINED. TWO COPIES OF THE COMPACTION REPORT
<br /> 1 . UNDERGROUND TANKS SHALL BE CLEANED AND DEGASSED PRIOR TO Iff) WHEN GROUNDING EQUIPMENT, SECURE THE END OF THE SHALL BE FORWARDED TO UNOCAL.
<br /> REMOVAL USING, AT A MINIMUM, THE FOLLOWING STANDARD PROCEDURE GROUNDING DEVICE THAT IS NOT ATTACHED TO THE EQUIPMENT TO
<br /> AN ADEQUATE GROUND, I.E., METAL WATER PIPE, METAL DRAINAGE,
<br /> o. ENSURE THAT THE PROCESS USED MEETS ALL AIR QUALITY AUTHORITIES AND OR SEWER PIPE, WHICH ORIGINATES OR TERMINATES IN THE
<br /> LOCAL CODE REGULATIONS. SOIL.A GROUND AS DESCRIBED ABOVE IS NOT AVAILABLE, A METAL ROD
<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.
<br /> STATE HAZARDOUS WASTE CERTIFICATION AND THE NAMES OF EMPLOYEES WHO
<br /> HAVE PASSED THE TEST. b. THE BONDING AND GROUNDING DEVICE SHALL BE CONNECTED TO
<br /> C. PRIOR TO EXCAVATION, CONTRACTOR SHALL OBTAIN AND PAY FOR ALL NECESSARY THE FOLLOWING EQUIPMENT AS DESCRIBED
<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, I.E., AT THE
<br /> d. CONTRACTOR SHALL NOTIFY FIRE DEPARTMENT AND / 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
<br /> ARRANGE FOR REQUIRED INSPECTIONS. CONNECTED TO THE EQUIPMENT WHERE THE LIQUID IS
<br /> BEING DISCHARGED, I.E., THE VACUUM TRUCK.
<br /> e. CONFIRM THAT ALL OF THE TANK'S PRODUCT HAS BEEN REMOVED (SCHEDULED BY
<br /> UNOCAL's REPRESENTATIVE). III) HIGH PRESSURE WATER RINSING EQUIPMENT - THE DEVICE
<br /> 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 /> i. CONTRACTOR SHALL REMOVE AND HANDLE ALL RESIDUAL LIQUID, SOLIDS, OR RINSING EQUIPMENT, SUCH AS PVC PIPE, IS USED, THEN AN 8 AWG
<br /> SLUDGES PURSUANT TO THE APPLICABLE PROVISIONS OF CHAPTERS 6.5 AND 6.7 WIRE MUST RUN INSIDE THE ENTIRE LENGTH OF THE NON - METALLIC
<br /> OF DIVISION 20 OF THE HEALTH AND SAFETY CODE AND LOCAL AGENCY CODES. EQUIPMENT, AND THIS WIRE MUST BE BONDED TO THE TANK AND
<br /> THIS INVOLVES DISCHARGING THE PETROLEUM RESIDUALS INTO APPROVED CONTAINERS ASSOCIATED EQUIPMENT.
<br /> AND TRANSPORTING THEM TO AN APPROPRIATE RECLAIMING, RECYCLING OR
<br /> TREATMENT / STORAGE / DISPOSAL (TSD) FACILITY BY A LICENSED HAZARDOUS 6. AFTER TRIPLE RINSING, COMPLETE THE TANK EXCAVATION.
<br /> WASTE TRANSPORTER OR LICENSED HAULER SUBJECT TO ALL APPLICABLE GOVERNMENT
<br /> REGULATIONS AND ALL LOCAL AGENCIES AS REQUIRED.
<br /> 7. RAISE THE END 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 /> 9- CONTRACTOR SHALL SAW CUT ASPHALT PAVEMENT, IF NECESSARY, TO MINIIMIZE 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.
<br /> THIS COMMODITY SHALL BE REMOVED BY PUMP WITH SUCTION RESTING AT LOW POINT
<br /> OF
<br /> h. CONTRACTOR SHALL BREAK OUT AND REMOVE ASPHALT PAVEMENT, CONCRETE 0. 1 0.NK IF READIINGRETESTTGREATER THAN TANKHE S0.H 1 0E ISOOBSE OBSERVEDIN MAKERT INTRODUCE THEDINGS
<br /> TIIONAL NNOT DRY ICEEXCEED
<br /> 3 SLABS, ETC. AND DISPOSE OF IN A LAWFUL MANNER IN AN APPROVED DISPOSAL AREA. INDICATED IN PARAGRAPH 11-B-2-a.
<br /> 1. 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 A 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 /> (. ISOLATE AND DISCONNECT ELECTRICAL LINES, PRODUCT PIPING AND ASSOCIATED DOCUMENTATION IS COMPLETED AND REMOVE TANK FROM THE PREMISES.
<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 /> k. CONTRACTOR SHALL DRAIN ALL PRODUCTS FROM DISPENSERS INTO AN APPROVED CONTAINER 10
<br /> FROM REXCOAVATEDLAREAUL TANKS AWAY FROM PREMISES IMMEDIATELY AFTER TANK REMOVAL
<br /> BEFORE REMOVING DISPENSERS FROM PUMP ISLAND.
<br /> 11 . CONTRACTOR SHALL RECORD TANK NUMBERS AND FURNISH THEM TO FIRE DEPARTMENT INSPECTOR
<br /> 2. ONLY ONE OF THE TWO FOLLOWING METHODS SHALL BE USED FOR PURGING THE TANK ATMOSPHERE. AND UNOCAL ENGINEER.
<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 (10% 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 i ,
<br /> GROUND UNTIL THIS LEVEL IS ACHIEVED.
<br /> o. CO2 DRY ICE METHOD: FOR EACH 1 , 000 GALLONS OF TANK CAPACITY, M MINIMUM OF 15 POUNDS
<br /> OF CO2, (OR BASED ON LOCAL ORDINANCES), IN THE FORM OF DRY ICE, SHALL BE PLACED IN THE TANK
<br /> THROUGH THE FILL OPENING.
<br /> CAUTION FOR THE FOLLOWING PROCEDURE, A GROUNDED DISCHARGING DEVICE MUST BE
<br /> USED TO DISSIPATE STATIC ELECTRIC CHARGES. SEE II-B-S-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 /> 4 REV DATE REVISED LL,P TS E.ffy KD BY �'° APPROVAL RECORD
<br /> A 8/31/95 REVISE PER COMMENTS DRAWN Rv TAIT APPROVALS
<br /> RH Ni�sroNe DATE APPROVAL
<br /> B
<br /> 3/13/96 REVISE PER COMMENTS
<br /> ISSUED FOR C.U.P. UNDERGROUND STORAGE TANK
<br /> CHECKED BY DAD
<br /> ISSUED FOR PLAN CHECK (REGREMOVAL AND DISPOSAL SPECIFICATIONS
<br /> �oRa o ,c �� °�7E
<br /> APPROVED
<br /> ISSUED FOR GEN. BID
<br /> ISSUED FOR CONSTRUCT.
<br /> DATE 2-8-95 1 uwr "#Lm oRMW NO. REV NO.
<br /> ah -
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<br /> sat£ NONE B
<br /> J - 0 Of - ^r-Ts
<br /> RECORD DRAWING
<br /> 0
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<br /> I� D E F JDWGS\STD-J-O
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