Attach_8_-_WT_808_Inspection_Report.pdf

Hurlburt Field, FL Tank Inspection Report

Tank No. 90808 Project No.:49-060

TANK INSPECTION REPORT

Tank Name: 90808 Tank Type: Elevated Location: Hurlburt AFB Tank Capacity: 250,000 gallons State: FL Type of Construction: Steel Built By: Unknown Location:

Year Built: 1991 Inspected By: Eric Boling Inspection Date: 2/22/19

GENERAL SUMMARY

Overall the tank is in fair condition with corrosion at most sharp edges and scattered throughout the tank surface, particularly on rod connections, ladders and floor of balcony. Coating system is beginning to show signs of failure with cracking and lifting of the multi-layer coatings throughout the tank surface.

RECOMMENDATIONS

Blast and repaint entirety of tank within next two years to prevent steel loss and protect long term integrity of the tank Enclose electrical and control panels in weatherproof enclosureat next repaint Re-install safety cable on primary ladder with correct alignmentand tension after next repaint.

Replace exterior ladder or solid seal weld sections that arecurrently bolted together. Ladder appears to be salvageable at this time, but corrosion at junction of rungs and sides need to be correctedbefore steel loss requires replacement.

Reattach or replace obstruction lighting on top of tank. Lights are currently working but are not properly attached to roof of tank.

Replace heavily corroded ladder brackets of roof ladder prior to repaint.

Tank No. 90808

STANDARDS

The inspection of the tank was performed with the tank nearly full and no cleaning was performed. The inspection consisted of a visual observation of the tank’s interior (as feasible with water present) and exterior components and coating system. Interior and exterior assessment was documented using digital still photography, representative samples of which are included in the Appendix of this report.

CONDITION OBSERVATIONS

Conditions noted in this report are documented in the following pages and supported by color photographs in the Appendix. Condition ratings used to describe field findings are defined as follows:

Excellent No deficiencies noted.

Good Minor deficiencies noted. Structure is functioning as designed.

Fair Major deficiencies noted. Structure is in need of repair (or replacement) to continue functioning as designed.

Poor Repair or replacement required immediately. Item no longer functioning as designed

CONTAMINATION, HEALTH & SAFETY REPORT

Contamination & Health Overall Condition: Excellent

Overflow pipe is equipped with screen, gasket and flapper to prevent access for insects All manways and hatches fit properly and wereclosed Roof vent is properly screened to prevent access for insects

Facility Safety Compliance Overall Condition: Good

Tank is located inside locked, fenced area at secure military site All ladders and safety climb in good condition, but require some repairs and coating replacement within next 1-2 years to avoid replacement Unable to determine if proper safety grid is over riser entrance at base of bowl to

Tank No. 90808 prevent falls due to presence of water Has 2nd hatch on side of bowl for safety/access during paintingprojects

Tank No. 90808

INTERIOR RESERVOIR INSPECTION REPORT

Interior Reservoir Roof Overall Condition: Fair

Most of ceiling coating in fair condition Heavy corrosion forming along thick, rough weld seams inceiling Undetermined if cathodic protection system is working

Interior Reservoir Walls Overall Condition: Fair

Coating on walls in area of water surface showing consistent corrosion and coating failure Coating on walls throughout showing signs of cracking and beginning to release from steel walls Corrosion is evident on areas of walls below the watersurface

Interior Reservoir Floor Overall Condition: Undetermined

Sediment and corrosion can be seen on floor of bowl, but complete inspection not possible without tank drained.

Interior Reservoir Plumbing Components Overall Condition: Good

Overflow pipe assembly is in good condition with corrosion along piping from water line up. Note: corrosion line on walls and overflow pipe indicate that tank is never completely filling, indicating need for adjustment in controls for filling of thetank.

Visible portion of fill pipe is in good condition with minimal corrosion in vicinity of water surface.

EXTERIOR RESERVOIR INSPECTION REPORT

Exterior Reservoir Roof Overall Condition: Fair

Coating on tank roof is in overall fair condition with scattered spots of minor corrosion, particularly along roof seams. Coating is beginning to crack and lift, which will expose steel to the elements if coating is allowed to continue to degrade.

Roof ladder in serviceable condition but brackets and weld connections require cleaning and recoating within next 1-2 years or will need to be replaced due to on-going metal loss.

Safety climb equipment on roof ladder is properly installed, including alignment and tension.

Roof vent is in good condition and is properly screened, but the tank/vent connection seam is showing minor to heavy corrosion around its perimeter.

Cathodic appear sealed but are corroding and staining top of tank

Tank No. 90808

Lip of primary hatch is corroded and should be rehabbed soon.

Tank No. 90808

Exterior Reservoir Walls Overall Condition: Fair

Coating on exterior walls in fair condition with signs of corrosion and/or coating failures Heavier corrosion along seams under tank belly, which is typical

Exterior Balcony Overall Condition: Fair

Coating on top of balcony in fair condition with signs of corrosion and/or coating failures Balcony railing in good condition with no signs of metal loss at time of inspection

Exterior Riser and Leg Structures Overall Condition: Fair

Windage rods and support beams in fair condition with signs of corrosion and coating failures Support beams in good condition with minor rust forming

Exterior Plumbing Structures Overall Condition: Good

Overflow pipe assembly in good condition and properly braced. Coating is starting to fail, as evidenced on remainder of tank, but piping is still salvageable.

Foundation Overall Condition: Good

Foundation of riser and legs in good condition with grout loss between base and foundation Minor corrosion on anchor bolt nuts with some areas of heavier corrosion on base plates around bolts.

GENERAL TANK SECURITY

Security Overall Condition: Excellent

Tank is located inside locked, fenced area at secure military site Exterior ladder is protected by locked ladder guard

Cathodic Protection System

Type, size, material and # of anodes:Overall Condition: N/A Present but condition unknown.

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Tank No. 90808

Appendix Photos

1- Tank

ID

Tank No. 90808

2 - Data Plate (Built 1991)

Tank No. 90808

3-Riser hatch bolts heavily corroded

Tank No. 90808

4-Sample tap piping properlyinsulated

Tank No. 90808

5-Grout and coating failure at riserbase

Tank No. 90808

6-Sample tap properly insulated

Tank No. 90808

7-Corrosion and coating failure at anchor bolt

Tank No. 90808

8-Overflow cover face and screen corroding

Tank No. 90808

9-Overflow flapper installedproperly

Tank No. 90808

10-Severe coating failure around sample tap penetration

Tank No. 90808

11-Sample spot of coatingcrack

Tank No. 90808

12-Coating failure at base ofriser

Tank No. 90808

13-Widespread cracking of coating with spots of breakthrough corrosion

Tank No. 90808

14-Base of leg and tension rods

Tank No. 90808

15-Coating cracked, lifted and unprotected steel corroding at base plate

Tank No. 90808

Tank No. 90808

16-Coating failure on tension rod brackets and bolts

Tank No. 90808

Tank No. 90808

Tank No. 90808

17-Coating failure on baseplate

Tank No. 90808

18-Electrical conduits properlysealed

Tank No. 90808

19-Ladder gate properly installed and locked upon arrival

Tank No. 90808

20-Electrical and control boxes exposed to weather

Tank No. 90808

21-Tank secured in lockedfence

Tank No. 90808

Tank No. 90808

Tank No. 90808

22-Coating on cross bracing beginning to fail and corrosion forming

Tank No. 90808

23-Coating beginning to fail and separate on sharp edges on tension rod turnbuckles

Tank No. 90808

24- Coating beginning to fail and separate on sharp edges on tension rod turnbuckles

Tank No. 90808

25-Bolts on rods beginning tocorrode

Tank No. 90808

26-Closer view of turnbucklecorrosion

Tank No. 90808

27-Widespread coating system cracking and lifting

Tank No. 90808

28-Detail of cracking, lifting coating system. Bare steel to be exposed as coating begins to flakeoff.

Tank No. 90808

Tank No. 90808

29-Safety climb loose and out ofalignment

Tank No. 90808

30-Coating failures

Tank No. 90808

31-Corroded, bolted ladder connection. Should be replaced or welded during repaint.

Tank No. 90808

32-Bolted ladderconnection

Tank No. 90808

33-Ladder rungs corroding at connection point

Tank No. 90808

34-Coating cracking and failing on ladder and ladder brackets

Tank No. 90808

35-Ladder rung coatingfailure

Tank No. 90808

36-Coating failure on uppermost windage rods and seams on belly of tank

Tank No. 90808

37-Closer view of belly and rods. Rods appear to be salvageable at this time

Tank No. 90808

38-Coating failure and corrosion at rod and beam connections

Tank No. 90808

39-Coating failure on supportrod

Tank No. 90808

40-Corrosion on bolts at rod and beam connections

Tank No. 90808

41-Close up of coating failure and corrosion at bolt connections

Tank No. 90808

42-Corrosion forming on sharp edges on tank exterior

Tank No. 90808

43-Mildew and widespread coatingcracking

Tank No. 90808

44-Ladder brace corroding will require replacement or welding repair

Tank No. 90808

Tank No. 90808

45-Ladder safety equipment mis-aligned but balcony opening is adequate

Tank No. 90808

46-Toe clearance for ladder at balcony is adequate. Ladder is corroding but salvageable.

Tank No. 90808

Tank No. 90808

47-Coating on balcony floor cracking and corrosion forming. No apparent structural damage to date, but should be addressed in a timelyfashion.

Tank No. 90808

48-Balcony floor and railing coating failures. No cross bracings on railing.

Tank No. 90808

49-Abnormally thick weld seam (should have been ground smooth after construction). Edges are beginning to corrode.

Tank No. 90808

50-Corrosion and paint failures at exterior bowl weld seams

Tank No. 90808

51-Thinning top coat of paint system

Tank No. 90808

52-Coating on balcony floor cracking, blistering and failing. Exposing steel to corrosion formation.

Tank No. 90808

53-Conduit brackets corroding and bleeding onto tank wall

Tank No. 90808

Tank No. 90808

54-Corrosion forming at weld seam of balcony toe kick.

Tank No. 90808

55-Widespread coating failure and corrsion on balcony floor

Tank No. 90808

56-Coating cracking and failing on stem of extra hatch on side of tank bowl (and bolts are corroding)

Tank No. 90808

57-Corroded hatch cover, bolts and balcony floor

Tank No. 90808

58-Corroded bolts, roof ladder braces and balcony floor

Tank No. 90808

59-Coating cracking and failing on exterior of bowl

Tank No. 90808

60-Old bracket connection corroding on side of roof ladder. Should be removed duringrepaint.

Tank No. 90808

61-Coating failure and corrosion on bottom roof ladder brackets

Tank No. 90808

Tank No. 90808

62-Close up of coating system cracking down to bare metal. Corrosion forming as steel losesprotection.

Tank No. 90808

Tank No. 90808

63-Heavy cracking around top of roof ladder from systemic coating failure on exterior of bowl. Cathodic protection bolts corrodingalso.

Tank No. 90808

64-Heavy cracking of coating around and on roof ladder brackets.

Tank No. 90808

65-Safety climb installed correctly on bowl ladder. Rungs of ladder exhibiting coatingfailures.

Tank No. 90808

66-Exterior coating cracking and beginning to peel, allowing underlying steel to corrode

Tank No. 90808

Tank No. 90808

67-One obstruction light not secured to top of tank. Support poles for other lighting and roof in the vicinity of lights corroding.

Tank No. 90808

68-Coating cracking and steel corroding on roof of tank

Tank No. 90808

Tank No. 90808

69-Ladder and hatch exhibiting coating failure and corrosion.

Tank No. 90808

70-Coating cracking and peeling at junction of tank roof and vent

Tank No. 90808

71-Corrosion forming at junction of roof and vent.

Tank No. 90808

72-Heavy corrosion of roof ladderbracket.

Tank No. 90808

Tank No. 90808

73-Remnants of old bracket corroding. Should be removed at next repaint.

Tank No. 90808

74-Cathodic protection cover corroding and staining top of tank.

Tank No. 90808

75-Rooftop coating cracking, blistering and peeling

Tank No. 90808

76-Exterior coating cracking andlifting

Tank No. 90808

77-Interior corrosion at water line

Tank No. 90808

78-Interior corrosion at weld seam above water line

Tank No. 90808

79-View of inlet/outlet pipe through water (which is clear). Doesn't appear to be safety grid over pipe entrance, which creates a fall hazard during tank maintenance.

Tank No. 90808

Tank No. 90808

80-Interior of bowl side hatch and ladder descending into bowl. Both are showing signs of corrosion requiring recoating.

Tank No. 90808

81-Corrosion at water level and along tank wall below water line. Dark area at bottom is staining and sediment.

Tank No. 90808

Tank No. 90808

82-Water is remaining several feet below overflow elevation in the tank with corrosion forming on walls and overflow piping at current waterline.

Tank No. 90808

Tank No. 90808

Tank No. 90808

83-Underside of balcony exhibiting coating failure, particularly along sharp edges

Tank No. 90808

84-Underside of balcony at tank leg junction. Coating failing and peelingalong thick, rough weld seams.

Tank No. 90808

85-Corrosion on wind rods and bolted connections under belly of tank

Tank No. 90808

86-Underside of balcony

Tank No. 90808

87-Underside of balcony. Coating failing and peeling around weepholes in balcony floor.

Tank No. 90808

88-Ladder rungs are 16" in width, which meets current OSHA code.

Hurlburt Field, FL Tank No. 90808