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Conclusion

Waldron has reviewed all the available information, and has taken into consideration the factors
surrounding the issues in question.

Waldron recommends approving $19,000.87 of the claim as noted above and did not review
schedule impacts under this PCO.

If you have any questions on the above, please don’t hesitate to contact me at 603-772-7153 x
148 or egustenhoven@waldron.com

Sincerely
Waldron Engineering & Construction, Inc.

Erich L. Gustenhoven, P.E.

Gree! Doc#: PCOS
SIT eens Ref. Document:
PROJECT NAME: Date: 26-Dec-19
Nashua Energy Recovery
PROJECT NO: 181012
PHASE
COST SUMMARY SHEET
Pipe Supports
A MC Labor (Recap Sheet): $3,868.34
B MC Materials, & Equipment (Recap Sheet): $7,431.78
Cc MC Fee (A x 15%) + (B x 15%): $1,695.01
D Subtotal MC Work (A+ B+C): | $ 12,995.11
E Total Subcontractors (Below): $9,000.00
F MC Mark-up on Subcontractor Work (5%, 7.5% or 10%): | $ 782.61
G Bond (1%) and General Liability (1%): $455.55
H Bond (1%) and General Liability (1%): ($4,232.40)
Total Proposal (D+E+F+G): $ 19,000.87
SUBCONTRACTOR SUMMARY
Subcontractor Description Amount
JP Welding Installation of Unistrut Ceiling Grid $ 9,000.00
$ -
$ -
$ -
5 -
5 -
Total Subcontractors: $ 9,000.00

Pipe Supports

Scope: Methuen Construction had concems with the pipe support system caliad out in the had di ECN-002 expressing thelr wilh the existing roof
integrity. Following this decision, Methuen had GPR on site to scan the rooffceiling to further examine existing conditions. It was determined thal there were various voids ail throughout the ceiling. In
order to further expiore the ceiling integrity, we had to perform some exploratory drilling to accurately map out the voids in the ceiling. We also performed pull tests on sampie anchors. Afler gathering all
this data, the owner/engincer was abio to provide a pipe support design as requested by the cily of Nashua. Once we had the design, we called a Hilti rep to inspect the ceiling, and provide Unistrut’s
and Hilti epoxy. We then furnished and Installed the Unistrut gnd pipe support system. Labor i ioned above, incl 9 staging + delivery, material pickups, subcontraclo
material prep, subcontractor cleanup. This is a delay in our critical path which will require an extension to our 1 contract PLEASE NOTE THAT 80 CALENDAR DAYS NEEDS TO BE ADDED TO THE

FINAL COMPLETION DATE, PROJECT WAS DLEAYED FROM 7/19/49-11/16/19. Approximately 2 months working on a new pipe support design and 2 months installing the system (5 day

Tking weeks), our rights for ing general conditions which are submitted under a seperate PCO No G04.
4-LABOR
CATEGORY HRS RATER PREMIUM SUBTOTAL LINE TOTAL TOTAL
$2,886.80
{2-MATERIALS
DESCRIPTION Qty UNIT UNIT COST SUBTOTAL
Estimated
GPRS services 10/2/2019 {Only charged 2/3 of the cost) 1 LS $ 1,066.67 $ 1,066.67
Unistruts, Fasteners, Threaded Rod,etc. 4 LS $ 3,287.78 $ 3,287.78
Hilti Adhesive, Anchor Rods i LS $ 2,003.32 $ 2,003.32
i | l }
SUBTOTAL $ 6,357.77
[3-EQUIPMENT
CATEGORY aQTy RATE UNIT SUBTOTAL
SUBTOTAL $1,074.01

Page 2 of 3 1/8/2020 - 8:33 AM

Pipe Supports

Scope: Methuen Construction had concerns with the pipe support system called out in the had distri ECN-002 expressing their with the existing roof
integrity. Following this decision, Methuen had GPR on site to scan the rooficeiling to furlher examine existing conditions. It was determined that there were various voids all throughout the ceiling, In
order to further explore the ceiling integrity, we had to perform some exploratory drifting to accurately map out ihe voids in the ceiling. We also performed pull tests on sampte anchors. After gathering all
this data, the owner/engineer was able to provide a pipe supporl design as requested by the city of Nashua, Once we had the design, we called a Hilti rep to inspect the ceiling, and provide Unistrat’'s
and Hilti epoxy. We then furisted and installed the Unistrut gnd pipe support system. Labor i i above, includi ig Staging + delivery, matenat pickups, subcontracto
materiat prep, subcontractor deanup. This is a delay in our critical path which will require an extension to our contracLPLEASE NOTE THAT 80 CALENDAR DAYS NEEDS TO BE ADDED TO THE
FINAL COMPLETION DATE. PROJECT WAS DLEAYED FROM 7/19/19-11/16/49. Approximately 2 months working on 2 new pipe support design and Z months installing the system {5 day

weeks). our rights for ing general conditions which are submitted under a seperate PCO No 004,
4-SUPPLEMENTAL COSTS
DESCRIPTION QTy RATE UNIT SUBTOTAL
SUBTOTAI $0.00
[5-BURDEN
CATEGORY RATE
BURDEN RATE 34.00% $981.51
[EGC WORK TOTAL
SUBTOTAL (Item 1+2+3+4) $11,300,03
17-SUBCONTRACTORS WORK
SUBCONTRACTOR UNIT COST ary COST TOTAL
SUBTOTAL $9,000.00
-FEE
GC (15% X Items 185 + 10% X Items 24384 + 5% X item 7} $2,477.62
{8-SUBTOTAL $22,777.74
BOND (1% X ttem&) $227.78
GENERAL LIABILITY (1% X ftom 8) $227.78
prorat (Item 8 + Bond + General Liability) $23,233.27

Page 3 of 1/8/2020 - 8:33 AM

JOHNSON’S PRECISION WELDING
37 Allison Park
Brewer, ME 04412
207.570.2690

jpweldingd5@gmail.com

Quote: Nashua Energy Recovery 10.27.19
Ceiling Grid and Support Steel

Metheun Construction Facilities Services
Attn: Don Hutchins

144 Main Street P.O. Box 980

Plaistow, NH 03865

Price includes installation of Unistrut Ceiling grid for piping and additional support
steel for generator. Materials supplied by others.

Pipe Support LS price: $9,000.00
Generator Pad LS price: $2,890.00
Total: $11,890.00

Thank you for the opportunity to bid the work.

Sincerely,

Matthew A. Johnson, Owner
Johnson's Precision Welding

Terms and Conditions: Net 15 and no retainage.

TITLE

Scope:The original estimate for the pipe support plan prior to the change required in PCO #3.

{LABOR
CATEGORY HRS RATE/HR PREMIUM SUBTOTAL LINE TOTAL TOTAL

SUBTOTAL $ 2,232.40

2-MATERIALS
DESCRIPTION QTy UNIT UNIT COST SUBTOTAL

Estimated

Clevice Hangers & Anchor Rods 41 $ 2,000.00] $ 2,000.00} $ 2,000.00

Dumpster / Disposai $ 750.00 | $ 750,00 | $ -

SUBTOTAL $ 2,000.00

SUBTOTAL 1 & 2 $4,232.40

Consider ($4,232.40) as a deduct in this overall PCO #3.

Page 1 of 2 12/3/2019 - 12:26 PM

\ THE CITY OF NASHUA | “The Cate City’

Administrative Services

Purchasine Department

January 30, 2020
Memo #20-079

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: LANDFILL GAS EXPANSION — CHANGE ORDER 1 (VALUE: $135,140)
DEPARTMENT: 168 SOLID WASTE; FUND: BOND

Please see the attached communication from Jeff Lafleur, Solid Waste Department Superintendent dated
January 30, 2020 for the information related to this contract.

Pursuant to § 5-78 Major purchases (greater than $10,000) A. All supplies and contractual services,
except as otherwise provided herein, when the estimated cost thereof shall exceed $10,000 shall be
purchased by formal, written contract from the lowest responsible bidder, after due notice inviting bids.
The Solid Waste Department Superintendent, Board of Public Works (January 30, 2020 meeting) and the

Purchasing Department recommend the award of this contract change order 1 in an amount of $135,140
to SCS Field Services of Reston, VA.

Respectfully,

A

YE
an‘Kooken
/ Purchasing Manager

Ce: J Lafleur L Fauteux

229 Main Street e Nashua, New Hampshire 03061 * Phone (603) 589-3330 e Fax (603) 589-3233 |

To:

From:

Re:

A. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: September 26, 2019

Jeff Lafleur, Superintendent
Solid Waste Department

2019 Landfill Gas Collection and Control System Expansion Change Order

To approve a change order to the contract with SCS Field Services of Reston, VA
in the amount of $135,140 pending bond approval. Funding will be through
Department 168 Solid Waste; Fund: Bond; Activity: Landfill Gas Expansion FY20.

Schedule of Values

The City issued a contract to SCS Field Services to construct an expansion of the
landfill gas collection system in the Phase I/II landfill. After receiving bids to build
the expansion, which includes new horizontal and vertical gas wells, one of the
main vacuum headers in the landfill began showing signs of failure (e.g. loss of
vacuum to several gas collectors). This change order is for the replacement of the
vacuum header. The Solid Waste Department’s engineering firm, Sanborn Head
and Associates, Inc. (SHA) prepared a construction design for the replacement
header. This work is required to control odors, mitigate fugitive methane surface
emissions and comply with the NHDES approved Operating Plan — Phase II
Secure Landfill Expansion and the Landfill Gas Collection System Enhanced
Monitoring Protocol/Standard Operating Procedures (EMP/SOP).

Schedule of Vajues

LFG Header Replacement

(Add on to 2019 Landfill Gas System Expansion)
Four Hills Land&ll

Nashua, New Hampshire

Item Description Quantity Bid Unit Cost Extended
No, scrip (w/ units) ($/units) Prices ($)
1__|Connect to Existing 12"9 Header 1 LS $2,000.00| LS $2,000.00

Furnish & Insta}] Landfill Gas Conveyance Pipe

a. 6"@ Solid SDR 17 HDPE Pipe 720 LF $70.00] LF $50,400.00
b, 12"@ Solid SDR 17 HDPE Pipe 620 LF $87.00 | LF $53,940.00
3 |Furnish & Install Isolation Valve (12")} 1 LS |} $5,000.00! LS $5,000.00
4 |Reconnect Wellhead Assemblies 28 EA $850.00} EA $23,800.00
Total] $135,140.00
Note:
1.

All pipe Jengths in the table above are plan view lengths (2D) and do not account for slope.

PA30002\3066.17\ Source Files\2019 Gas Praject\Replacement Header\ Bid tem Defs\,

20390904

Schedule of Vatiesxise

Page 1 of 1

Sanborn Head & Associates, Inc.

CHANGE ORDER

No.1
PROJECT: 2019 Landfill Gas System Expansion
OWNER’S CONTRACT NO: IFB0593-080919
EXECUTED CONTRACT DATE: September 19, 2019
DATE OF ISSUANCE: Upon City Approval EFFECTIVE DATE: Upon City Approval
OWNER: City of Nashua, NH

OWNER’s Purchase Order NO.: 152614
CONTRACTOR: SCS Field Services

ENGINEER: Sanborn Head & Associates

You are directed to make the following changes in the Contract Documents:

Description: For the replacement of a vacuum header.

Justification: During the construction of Phase I/II for the Landfill Gas Collection System, which
included new horizontal and vertical gas wells, one of the main vacuum headers in the Landfill began
showing signs of failure (e.g. loss of vacuum to several gas collectors). The Engineer, Sanborn Head
Associates, has prepared a construction design for the replacement of the vacuum header.

Attachment(s): Sanborn Head Associates Schedule of Values

Change Order # | 1 of 2
IFB0593-080919

2019 Landfill Gas Collection and Control System Expansion