Attachment 05-Tank 1617 Inspection Report_Redacted.pdf

PHOTO SHOWS FOUNDATION

THE FOUNDATION IS SHOWING SIGNS OF CRACKING/SPALLING AND IS NOT PROPERLY SEALED TO

SAFEGUARD FROM WATER PENETRATION AND THE EFFECTS OF THE FREEZE-THAW CYCLE DURING

COLD WEATHER. WE RECOMMEND TO HAND TOOL CLEAN FOUNDATION, REPAIR

SPALLING/CRACKING AREAS AND APPLY ONE COAT OF SEALER TO EXPOSED AREAS.

THE AREA BETWEEN THE FOUNDATION AND THE CHIME IS NOT PROPERLY SEALED. WE

RECOMMEND TO CAULK BETWEEN FOUNDATION AND CHIME TO PREVENT INGRESS OF WATER

UNDER TANK BOTTOM IN ACCORDANCE WITH NFPA 22 2018.12.2.1.2 REQUIREMENTS.

PHOTO SHOWS FOUNDATION AND GROUNDING

CORROSION CONTROL IS AN ESSENTIAL PART OF THE MAINTENANCE AND LONGEVITY OF

WATER TANKS. WE RECOMMEND TO FURNISH AND INSTALL A RADIAL CATHODIC

PROTECTION SYSTEM TO ACT AS A PREVENTATIVE MEASURE CORROSION AGAINST THE

UNDERSIDE OF TANK FLOOR.

PHOTO SHOWS PRIMARY MANWAY AND GAUGE

THE EXISTING MANWAY BOLTS ARE SHOWING SIGNS OF CORROSION, WHICH CAN LEAD TO BOLT

FAILURE AND STAINING OF FINISHED SURFACES. WE RECOMMEND TO REPLACE EXISTING BOLTS

WITH GALVANIZED BOLTS AS A PREVENTATIVE MEASURE TO ENSURE PROPER FASTENER

OPERATION AND TO SAFE GUARD EXTERIOR COATING.

THE EXISTING SIGNAGE IS IN POOR CONDITION. WE RECOMMEND TO FURNISH AND INSTALL

CONFINED SPACE, FALL PROTECTION EQUIPMENT REQUIRED, AND DEPARTMENT HOMELAND

SECURITY SIGNS ON THE TANK IN ACCORDANCE WITH OSHA AND THE DEPARTMENT OF

HOMELAND SECURITY CODES.

PHOTO SHOWS SECONDARY MANWAY

THIS TANK IS EQUIPPED WITH (2) 24" MANWAYS. AWWA D100-11 7.4.4 CALLS FOR (2)

SHELL MANWAYS; ONE OF WHICH BEING CIRCULAR WITH A MINIMUM DIAMETER OF 30".

WE RECOMMEND TO REPLACE EXISTING SHELL MANWAY WITH A 30" SHELL MANWAY

COMPLETE WITH A DAVIT ARM AND GALVANIZED BOLTS IN ACCORDANCE WITH OSHA,

AWWA D100-11 7.4.4 AND NFPA 22 2018 14.7.2 REQUIREMENTS.

PHOTO SHOWS LIQUID LEVEL INDICATOR

THE LIQUID LEVEL INDICATOR IS BROKEN. WE RECOMMEND TO REPAIR, CLEAN, AND

LUBRICATE THE EXISTING LIQUID LEVEL INDICATOR AS NECESSARY IN ACCORDANCE WITH

NFPA 22 2018 14.1.8 REQUIREMENTS.

PHOTO SHOWS PIPING CONNECTED TO TANK

WE RECOMMEND TO FURNISH AND INSTALL A 2” DIAMETER FROST PROOF AND LOCKABLE

DRAIN VALVE TO AS CLOSE TO THE BOTTOM OF THE TANK AS POSSIBLE. WE ARE MAKING

THIS RECOMMENDATION AS MOST TANK OWNER’S DO NOT HAVE THE MEANS IN PLACE

TO EFFECTIVELY DRAIN THEIR TANKS. MOST FACILITIES MUST FOLLOW WATER DRAINAGE

REQUIREMENTS THAT COMPLY WITH THEIR FACILITIES STORM WATER PLAN WHICH

REQUIRES THE WATER TO BE DIRECTED INTO A STORM DRAIN. THE DRAIN VALVE ALLOWS

THE HOOKUP OF A DRAIN LINE SO THE WATER MAY BE DIRECTIONALIZED.

PHOTO SHOWS CATHODIC PROTECTION

ACTIVE CATHODIC PROTECTION IS HIGH MAINTENANCE AND REQUIRES CONSISTENT

MONITORING. WE RECOMMEND TO REMOVE EXISTING CATHODIC PROTECTION SYSTEM,

SEAL WELD HAND HOLES CLOSED TO PREVENT THE INGRESS OF DEBRIS AND

CONTAMINATED WATER AND FURNISH AND INSTALL A PASSIVE CATHODIC PROTECTION

SYSTEM AS A MORE COST EFFECTIVE AND LOW MAINTENANCE METHOD OF PROTECTING

YOUR TANK.

PHOTO SHOWS OVERFLOW

THE OVERFLOW DOES NOT HAVE AN AIR BRAKE. THIS COULD CREATE A HAZARDOUS

SITUATION BY ALLOWING EXCESSIVE WATER LEVEL IN TANK. SHOULD PIPING BECOME

BLOCKED UNDERGROUND WITHOUT THE OWNERS KNOWLEDGE, WE RECOMMEND TO

FURNISH AND INSTALL AIRBRAKE ON EXISTING OVERFLOW IN ACCORDANCE WITH AWWA

D100-11, NFPA 22, AND EPA CODES.

PHOTO SHOWS EXTERIOR SHELL CONDITION

THE EXTERIOR COATING OF THIS TANK IS EXHIBITING SIGNS OF

CORROSION/STAINING/COATING FAILURE. WE RECOMMEND TO PROPERLY PREPARE THE

AREAS OF DEFECT AND/OR ENTIRE EXTERIOR SURFACE AND APPLY A PROTECTIVE

EXTERIOR COATING SYSTEM AS NEEDED.

PHOTO SHOWS PIPING INSIDE PUMP HOUSE

WE RECOMMEND TO FURNISH AND INSTALL AN ASHCROFT THERMOMETER AND A LIQUID

LEVEL GAUGE THAT READS IN FEET AND PSI.

PHOTO SHOWS UPWARD VIEW OF LADDER

PHOTO SHOWS DOWNWARD VIEW OF LADDER

PHOTO SHOWS OVERVIEW OF TANK

THE LADDER OPENING IS NOT PROTECTED BY A SWING GATE. WE RECOMMEND TO

FURNISH AND INSTALL A SWING GATE IN THE HANDRAIL OPENING IN ACCORDANCE WITH

CURRENT OSHA, AWWA, AND NFPA REQUIREMENTS.

PHOTO SHOWS CHECKING OF THE COATING LEADING/RUNNING FROM THE CORRODED

SPOTS ON TANK ROOF

PHOTO SHOWS ROOF VENT

WE RECOMMEND TO REMOVE AND REPLACE THE NON COMPLIANT ROOF VENT WITH A FROST

PROOF/PRESSURE PROOF VENT IN ACCORDANCE WITH AWWA D100-11 7.5, 7.5.1 AND 7.5.2

REQUIREMENTS.

FURTHERMORE, WE RECOMMEND TO FURNISH AND INSTALL A FLANGED NECK/NOZZLE BETWEEN

ROOF TOP AND THE NEW ROOF VENT TO ALLOW ATTACHMENT OF A VENTILATION FAN TO ALLOW

REMOVAL OF THE VENT AND ATTACHMENT OF A FAN TO PROVIDE PROPER AIRFLOW AND

QUALITY WHILE WELDING, WORKING, ABRASIVE BLASTING AND PAINTING INSIDE THE TANK AS WELL AS TO ALLOW PROPER VENTILATION VIA A FAN FOR CURING OF THE INTERIOR COATING.

PHOTO SHOWS PRIMARY ROOF HATCH

THE PRIMARY ROOF HATCH IS NON-COMPLIANT AND IS WELDED SHUT. WE RECOMMEND TO

REPLACE THE EXISTING NON-COMPLIANT ROOF HATCH WITH A 24” X 24” SQUARE HATCH IN

ACCORDANCE WITH AWWA D100-11 5.4.3.1 AND NFPA 22 2018 CODE REQUIREMENTS.

THE TANK DOES NOT HAVE AN INTERIOR LADDER INSTALLED. WE RECOMMEND TO FURNISH AND

INSTALL AN INTERIOR LADDER WITH SAFETY CLIMB DEVICE IN ACCORDANCE WITH OSHA, AWWA

D100-11 5.4.2.5 AND NFPA 22 2018 CODE REQUIREMENTS.

PHOTO SHOWS SECONDARY ROOF HATCH

THE INTERIOR LADDER DOES NOT HAVE A SAFETY CLIMB DEVICE INSTALLED. THIS IS AN

OSHA VIOLATION. WE RECOMMEND TO FURNISH AND INSTALL A SAFETY CLIMB DEVICE

ON INTERIOR LADDER IN ACCORDANCE WITH OSHA REQUIREMENTS.

PHOTO SHOWS CENTER SUPPORT COLUMN AND RAFTERS

WE RECOMMEND TO CAULK INTERIOR LAPPED ROOF JOINTS AFTER PAINTING TO PREVENT

PREMATURE FAILURE OF COATING.

NOTICE THE GAP BETWEEN THE RAFTERS AND THE ROOF. THIS IS CAUSED BY VOIDS BETWEEN

THE TANK BOTTOM AND THE FOUNDATION. WE RECOMMEND TO FURNISH AND INSTALL

THREADED COUPLINGS ON 120 DEGREE INCREMENTS, PRESSURE GROUT THE UNDERSIDE OF THE

FLOOR TO FILL VOIDS, REMOVE AND PLATE OVER THE COUPLINGS, PERFORM VACUUM BOX

TESTING OF FLOOR WELDS, MARK BAD WELDS, AND REPAIR ANY LEAKS FOUND IN ACCORDANCE

WITH AWWA D100-11 12.6.2 AND NFPA CODE 25 2014 9.4.1 REQUIREMENTS.

PHOTO SHOWS RAFTERS

WE RECOMMEND TO CAULK THE ROOF TO RIM ANGLE CONNECTION TO PREVENT

PREMATURE FAILURE OF COATING.

WE RECOMMEND WELDING THE RAFTER-TO-SUPPORT COLUMN AND RAFTER-TO-SHELL

CONNECTIONS TO REINFORCE.

COATING CONDITIONS:

NON-DESTRUCTIVE FILM THICKNESS TESTING WAS CONDUCTED ON THE ROOF, SHELL AND

INTERIOR. THE RANGES WERE AS FOLLOWS:

BLISTERING (ASTM D714) WAS FOUND ON THE INTERIOR EPOXY COATING. SEE PAGES 18-

26.

CHALKING (ASTM D4214) WAS FOUND ON EXTERIOR COATING. SEE PAGES 2-10.

CHECKING (ASTM D660) WAS FOUND MAINLY ON THE ROOF AND VARIOUS SMALL AREAS.

SOME CRACKING CAN BE FOUND ON PIPES AND SMALL AREAS OF THE SHELL. SEE PAGE 15.

CORROSION/PITTING AND CRACKING (ASTM D661) WAS FOUND THROUGHOUT THE

SHELL, ROOF AND INTERIOR COATING.

SURFACE RUST (ASTM D610) WAS FOUND MAINLY ON THE INTERIOR COATING AND TANK

ROOF. MINOR SPOTS WERE FOUND ON THE EXTERIOR SHELL.

ROOF 7.0 – 9.2

SHELL 10.5 – 17.5

INTERIOR 16.3 – 19.4