WALDRON ENGINEERING & CONSTRUCTION, INC.
To: William Keating, P.E., Project Engineer, Nashua Wastewater Treatment Facility
From: Erich L. Gustenhoven, P.E., Waldron Engineering & Construction, Inc.
Date: March 9, 2020
Re: Change Order Request Review 015
NWWTF Energy Recovery Upgrade Project
Attachments: Methuen Construction PCO-015 HX Supports
Mr. Keating:
Waldron has compiled its review based on review of the Owner’s documentation (design
documents, OEM submittals, submittal reviews, RFI responses, and project notes) and the
Contractor’s documentation (RFI’s, Submittals, Reports, issued Change Orders). Specifically;
Waldron has reviewed the issue of additional work associated with providing support stands for
HW-HX1 & 2.
Summary Review
Original Schedule Schedule Direct Schedule Schedule Claim
Adjustment claim Impact Assessment Recommended
None n/a n/a 0
Original Cost Cost Adjustment Direct Cost Impact Cost Adjustment
claim Assessment Recommended
None $3,372.53 52,552.00 to $3,372.53
$3,828.00
Detailed Review-Base Cost Validity
Methuen has made a claim for the work as required based on RFI responses, submittal reviews
and Field conditions. The claim is based on their work and their subcontractor’s work resulting
from the above. Waldron has reviewed the design documents, OEM submittals, submittal
reviews, and RFI responses regarding this issue. Waldron has relied on vendor quotes, project
cost estimations, historical project data, RS Means, and its own proprietary cost data to review the
cost validity of the work scope.
Specifically, Methuen constructed support stands for HW-HX1 & FX2 which was not part of
their original work scope. These heat exchangers were provided by the reciprocating engine
vendor. The original design expected these heat exchangers to be provided with a built-in base
with anchor holes. However, this was not specified explicitly. The heat exchangers were
provided without this accessory and this required field coordination to resolve. Due to the lead
time associated with ordering a catalog component, Waldron recommended Methuen field
fabricate the support stands. Refer to RFI-046.
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