Mass Tank Inspection Services, LLC 29 Abbey Lane Middleboro, MA masstankinspection.com

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1 June 18, 2018 Mrs. Nancy Cole Administrator Village of Eidelweiss 1680 Conway RD Madison, NH Mass Tank Inspection Services, LLC 29 Abbey Lane Middleboro, MA masstankinspection.com RE: 30,000 Gallon tanks (3) Locus: 20 Reinach Place (2) 99 Oak Ridge RD (1) Madison, NH Dear Mrs. Cole Summary: Mass tank inspection and services has completed internal inspections of the 3 underground storage tanks referenced above. All tanks are in potable water service. The thickness data, along with other test parameters is provided in the field inspection reports included herein. 20 Reinach Place: Both underground storage tanks located at 20 Reinach Place have a diameter of 10 feet 6 inches and length of 46 feet. Structural Deficiency Tank 1: STI SP131, Standard for Inspection, Repair, and Modification of Shop Fabricated Underground Tanks for Storage of Flammable and Combustible Liquids, Section 8.2, Structural Deficiency Limits states that a tank does not qualify for repair if the tank shell has an inward dent with a cross measurement greater than the radius of the tank head or which protrudes into the tank greater than 1 inch for every 1 foot of tank radius. Located at the middle weld seam of Tank 1, or third seam from the manway, is a large inward dent which measures 101 inches across and protrudes 18 inches into the tank. The total diameter of the tank head is 10 feet, 6 inches, making the radius 5 feet, 3

2 inches, the damage to the tank is not repairable as the cross measurement of the dent is 101 inches, and protrudes 18 inches into the tank. Structural Deficiency Tank 2: Tank 2, located inside the building at 20 Reinach Place, shows 3 indentations to the shell. 2 of which meet failure criteria under STI SP131, Section 8.2, Structural Deficiency Limits. The largest of these indentations measures 48 inches across, protrudes 12 inches into the tank, and is indicated at right by the red arrow. The other indentation, meeting failure criteria, is located at the bottom of the front shell course. This indentation measures 45 inches across and protrudes 6 inches into the tank. The third indentation is located at the rear shell course, measures 41 inches across and protrudes 4 inches into the tank and does not meet failure criteria. Recommendation for continued service: Both tanks, located at 20 Reinach Place, are not recommended for continued service as the damage to the shell is so extensive it does not meet the criteria for repair under STI SP 131 Sec Oak Ridge RD: The underground storage tank located at 99 Oak Ridge RD is in potable water service, has a diameter of 10 feet 6 inches and a length of 48 feet. All plate seams are of lap joint construction and are welded internally and externally. Foundation: The foundation to the tank is compromised, showing significant cracks indicated at right by the red arrows.

3 Coatings: External: The coating to the exposed portion of the tank shows moderate failure and subsequent minor corrosion along the foundation to shell interface, and spot failures with minor surface rust across the flat portion of the head. Internal: The internal coating of the tank has failed across over 75% of the surface. Moderate corrosion is shown across the interior surface with localized areas of pitting measuring inch at the deepest. Leaving over 50% of total wall thickness remaining and does not require repair by welding under SP131 Sec. 9.1-b. One such pit is indicated at right by the yellow arrow. Recommendation for continued service: This tank, located at 99 Oak Ridge RD is recommended for continued service with action items. Action Item 1: Repair the cracks to the foundation by re-grouting with similar material. Action item 2: To arrest the active corrosion to the interior, the tank should be abrasively blasted and coated with an NSF Certified liner. Recommendation: The front head and adjoining exposed shell portion should be abrasively blasted and recoated to arrest the corrosion to these areas. I look forward to speaking with you further regarding this project, please feel free to reach me at my office should you have any questions. Sincerely, Andrew Alfone Certified Tank Inspector

4 Manufacturer INSPECTION DATE(s): 11/7/2017 COMPANY NAME: Clean Harbors Environmental Services TANK ADDRESS: 1 Hill Ave, Braintree, MA CONTACT: David Medina INSPECTOR NAME(s): Andrew Alfone Tank Information Identification Number Date of Fabrication Design Standard Service / Product Capacity Diameter Height (shell length) Material of Construction Double Wall or Single Wall? Aboveground or Underground? Visual Inspection Declivity Spalling, Cracking Settlement Other Nameplate Signage Emergency Vent Vent Pipe Fill Pipe Level Gauge Nozzles Derived from nameplate or tank characteristics The ID # of the Tank assigned by client Derived from nameplate, plans or interview Derived from nameplate or plans Type of fluid stored Inspection Form Key Derived from nameplate, plans or field measurement Measured across the tank bottom from outside shell to outside shell. Measured from tank bottom to top of shell wall not including top cap elevation. The material the tank is made of. Is the tank equipped with a secondary wall to act as a containment vessel? Is the tank classified as an AST or UST (10% Buried)? Criteria FOUNDATION The surface on which the tank bares. Pass Marginal Fail NA None TANK Is the tank level? Is the foundation cement crumbling or cracking to the peril of the tanks viability? Is the foundation sinking to the peril of the tank? Are there other concerns such as water damage etc.? Is nameplate on the tank: ID manufacturer, design standard & construction date? Are there signs which ID the tank's contents? Is there a vent on the AST compliant with UL 142, NFPA 30 & NFPA 1? Is the vent pipe adequately sized? Any blockage? Is the fill pipe adequately sized? Any blockage? Does the level gauge accurately display the fuel level of the primary tank? Visible from fillport? Are nozzles protected, welded, dry with no cracking? Interstice Leak Detection Operational? Is the equipment used to detect fluid in the space between the primary and secondary functional? Fluid in Interstice Leaks Staining Odor Grounded Supports/Saddles Anchor Points Internal Coating External Coating Welds Flange Face Internal Corrosion External Corrosion Shell Distortions, Deformations Pitting Dents, Gouges Spider Cracking Brittle Fracture General Condition Is there fluid in the space between the primary and secondary tanks? Are there any visible leaks at nozzles, pumps, conduits, tank shell? Is there staining anywhere that is tell tale of a recent event or current leak? Is there a product odor indicative of inadequate venting? Is tank grounded by being bolted to concrete and connected to piping? Are supports/saddles installed compliant with UL 142 and are there any failure indications? Are supports anchored to the foundation? Are there any coating failures? Is the condition of the paint such that it impacts on the tanks viability? Are there undercutting, cracking, penetration failure or other weld failures indicated? Is there corrosion or other defects that can impact the liquid tightness of the flange? Is there evidence of significant rust and corrosion? Is there evidence of significant rust and corrosion? Distortions that are tell tale of faulty vent, intense heat or design flaw? Does significant pitting exist? Has the tank been hit, dropped or is there other denting indicative of inadequate venting? Is there any type of cracking especially small clustered cracking at stress points? Does the tank design render it susceptible to brittle fracture? What was the general condition of the tank? The ultrasonic thickness survey was conducted with a 2012 Panametrics MODEL 38DL PLUS ULTRASONIC THICKNESS GAUGE as seen below. Acceptable for continued service Line item is absent or in poor condition and repair or replacement is suggested Line item is absent or in poor condition and requires repair or replacement; and may effect continued service condition Line item is not applicable to subject tank Line item is not present or there are no indications Field Inspection Form.xlsx

5 INSPECTION DATE(s): May 14, 2018 COMPANY NAME: Eidelweiss TANK ADDRESS: 99 Oak Ridge RD, Madison, NH CONTACT: Nancy Cole INSPECTOR NAME(s): M. Jensen, A. Alfone, J. Caisse Tank Information Identification Number Manufacturer Reinach Place Tank 1 (outside) Mass Engineering Date of Fabrication 1970 Design Standard Service / Product Capacity Diameter Height (shell length) Material of Construction Double Wall or Single Wall? Unknown Potable Water 30,000 Gallons 10 ft 6 inches 48 feet Carbon Steel Single Aboveground or Underground? Underground Visual Inspection Comments Pass Marginal Fail NA None FOUNDATION Declivity Spalling, Cracking Settlement Other TANK Nameplate Signage Emergency Vent Vent Pipe Size 4 inch Fill Pipe Size Level Gauge Nozzles Interstice Leak Detection Operational? Fluid in Interstice Leaks Staining Odor Grounded Supports/Saddles Anchor Points Internal Coating Complete failure of the internal coating External Coating Minor failures at the exposed portion of the shell and head Welds Flange Face Internal Corrosion Moderate widespread corrosion External Corrosion Minor widespread corrosion at the exposed portion Shell Distortions, Deformations Large Deformation at middle seam Pitting Minor pitting to the interior shell surfaces Dents, Gouges 101 inch circuler indentaton at the middle seam. Spider Cracking Brittle Fracture General Condition The red arrow indicates a large inward dent at the middle (3 rd ) weld seam of the tank measuring 101 inches across and 20 inches deep. The 4 inch normal vent is equipped with a screen to prevent invasion of the tank by local flora and fauna. The vent shows no obstruction by foreign material. Field Inspection Form.xlsx

6 INSPECTION DATE(s): June 18, 2018 COMPANY NAME: Eidelweiss TANK ADDRESS: 99 Oak Ridge RD, Madison, NH CONTACT: Nancy Cole INSPECTOR NAME(s): A. Alfone, J. Fournier, J. Caisse Tank Information Identification Number Manufacturer Reinach Place Tank 2 (inside) Mass Engineering Date of Fabrication 1972 Design Standard Service / Product Capacity Diameter Height (shell length) Material of Construction Double Wall or Single Wall? Unknown Potable Water 30,000 Gallons 10 ft 6 inches 46 feet Carbon Steel Single Aboveground or Underground? Underground Visual Inspection Comments Pass Marginal Fail NA None FOUNDATION Declivity Spalling, Cracking Settlement Other TANK Nameplate Signage Emergency Vent Vent Pipe Size 4 inch Fill Pipe Size Level Gauge Nozzles Interstice Leak Detection Operational? Fluid in Interstice Leaks Staining Odor Grounded Supports/Saddles Anchor Points Internal Coating Complete failure of the internal coating External Coating Minor failures at the exposed portion of the shell and head Welds Flange Face Internal Corrosion Moderate widespread corrosion External Corrosion Minor widespread corrosion at the exposed portion Large deformations at the middle seam and both ends of Shell Distortions, Deformations the shell floor Pitting Minor pitting to the interior shell surface Dents, Gouges 48 inch circuler indentaton at the middle seam. Spider Cracking Brittle Fracture General Condition The red arrow indicates a large inward dent at the middle (3 rd ) weld seam of the tank measuring 48 inches across and protrudes 12 inches into the tank. The yellow arrow indicates a flat spot at the bottom of the front shell course which measures 45 inches across and protrudes 6 inches into the tank. Field Inspection Form.xlsx

7 INSPECTION DATE(s): May 14, 2018 COMPANY NAME: Eidelweiss TANK ADDRESS: 99 Oak Ridge RD, Madison, NH CONTACT: Nancy Cole INSPECTOR NAME(s): M. Jensen, A. Alfone, J. Caisse Tank Information Identification Number Manufacturer Oak Ridge J.L. Clemmey Co. Inc. Date of Fabrication 1980 Design Standard Service / Product Capacity Diameter Height (shell length) Material of Construction Double Wall or Single Wall? Unknown Potable Water 30,000 gallons 10 feet 6 inches 48 feet Carbon Steel Single Aboveground or Underground?Underground Visual Inspection Comments Pass Marginal Fail NA None FOUNDATION Declivity Spalling, Cracking Cracking of the support wall is evident. Settlement Other Nameplate Signage TANK Emergency Vent Vent Pipe Size 8 inch nozzle is reduced to 3 inch PVC pipe Fill Pipe Size 2 inch Level Gauge Nozzles Interstice Leak Detection Operational? Fluid in Interstice Leaks Staining Odor Grounded Supports/Saddles Cracking of the support wall is evident. Anchor Points Internal Coating 75% Failure of the internal coating External Coating Minor failures at the exposed portion of the shell and head Welds Flange Face Internal Corrosion Moderate widespread corrosion External Corrosion Minor widespread corrosion at the exposed portion Shell Distortions, Deformations Pitting Minor pitting to the interior shell surface Dents, Gouges Spider Cracking Brittle Fracture General Condition The red arrow indicates evident and severe cracking of the structural support wall at the front of the tank. The interior shell wall of the UST show moderate corrosion and coating failure across approx. 75% of the surface. The exposed portion of the UST shows moderate coating failure and minor surface rust. Field Inspection Form.xlsx

8 Shell Plate Ultrasonic Thickness Survey Data Tank #1 data in thousandths of inch Asset Identification # 30k Shell Shell Shell Head Head Inspection Date 14-May Service Potable Water Date of Construction Asset Type Atmospheric UST Material of Construction Carbon Steel Length 48 feet Diameter 10 feet 6 inches Tank Capacity 30,000 gallons MAWP Atmospheric Next Inspection The ultrasonic thickness survey was conducted with a 2013 Panametrics MODEL 38DL PLUS ULTRASONIC THICKNESS GAUGE as seen right. The gauge was field calibrated on May 14, 9:30 hours using 0.25 and 0.5 inch Carbon Steel standard coupons. UT Tech; AA L I SNT TC Column Average Total Average Component Thickness Current Thinnest Measured Component Thickness Design Thickness Worst Case Metal Loss Number of Service Years Worst Case Shell Plate Corrosion Rate/Yr in inches Minimum Thickness Required Current shell thickness available for corrosion allowance inches Estimated Remaining Service Life of plate years The red arrows show pitting depth of and inch to the interior shell walls. Most likely causative factor of this localized corrosion/pitting is failed coating. The yellow arrows indicate the remaining coating present only at the roof, above the high water line. Failed coating at the shell invert exposes steel to product, exacerbating corrosion to these areas.