ll. Project
Approach
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
A
li. Description of Work and Approach to RFQ (Rev.2)
In response to the RFQ, Waldron has structured a Scope of Work and approach that
includes all aspects of the RFQ Scope. Our team has a strong knowledge base for the recip
engine CHP as well as digester gas system design and operation. This allows our team to
provide detailed accurate design information from the start. In particular, our approach is
to work with the facility to develop a design that not only allows for the installation of the
CHP but to make decisions early in the process to avoid delays and problems throughout
the design, installation and startup phases. We will work with all parties to develop a
design that will result in the optimal life cycle economics and greenhouse gas impact.
Project Description
The main intent of the project is to replace the existing 380 kW Waukesha Engine CHP with
2 CAT G3406 200kW engines generators and it auxiliary equipment so that the CHP can
fully utilize the digester gas production to maximize the economic outcome. The main
project scopes are:
1. To replace the existing Waukesha 380 kW cogen generators with 2 CAT G3406
200kW Model recip engine generator and hot water heat exchangers between the
cogen building and digester and other auxiliary equipment associated with the
engine generators. Evaluate potential options to increase digester gas production.
2. Evaluate the most economical cogeneration generator size that is capable to utilize
all the digester gas produced. Two cogeneration generators will be the prefer
option for redundancy.
3. The two new cogeneration generators and auxiliary equipment will be fitted in the
existing Energy Recover Building with proper egress.
4. Evaluate capacity of piping size, digester gas production that allows the 2 new cogen
generators to operate in full capacity, boiler capacity to heat the digester sludge,
equipment capacity in gas cleansing room, gas flare capacity and gas holding tank
system capacity.
Revised August 28, 2017
WALDRON
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
Scope cf Work -Work Breakdown Struciure
1. 30% Design
1.1. Project kickoff meeting.
1.2. Collect and review existing facility design document.
1.3. Evaluate Cogen Generator Options and building layout and site plan.
1.4. Evaluate existing digester gas capacity and cleaning system conditions that
includes (service provided by Wright-Pierces):
1.4.1. Assess condition of existing Gas Cleansing Room equipment including
iron sponge, drip traps, foam separator, condensate traps.
1.4.2. Review data on digester gas quality before and after gas cleaning
system (testing to be carried out by others and provided by the City).
Compare test results to requirements for new generator.
1.4.3. Prepare brief technical memorandum summarizing any issues with the
condition of the existing equipment and identifying any gas quality
issues that need to be addressed either to meet the air permit
requirements or to meet the warrantee requirements of the proposed
generator(s)
1.5. Develop conceptual site plan layout and General Arrangement for major
equipment.
1.6. Identify potential options to enhance the project.
1.7. Develop major system equipment list.
1.8. Develop “rule of thumb” cost estimates for cogen options.
1.9. Attend one (1) design progress meetings — additional to the project kickoff
meeting.
1.10. Meet with City of Nashua and WWTF personnel to review the findings and
obtain approval for final system configuration.
2. 75% Design
2.1. Develop Basis of Design for mechanical, electrical and control systems. This
Basis of Design document defines the design criteria, outlines the system
design, equipment and component design features, as well as the performance
characteristics consistent with that criteria. This Basis of Design document
also creates the framework for the construction documents, major equipment
specifications and construction specifications.
2.2. Develop equipment demo and system tie-in design.
2.3. Revise layout and site plan diagrams
2.4. Develop electric power one-line diagrams.
2.5. Develop protection one-line diagrams.
2.6. Develop digester gas, natural gas and hot water system P&ID.
Revised August 28, 2017
WALDRON |
Nashua Waste Water Treatment Facility — Energy Recovery Generator Upgrade
Engineering Design Services
2.7. Prepare electrical control scheme design including load sharing mode of
operation among engines generator and utility and synchronization to the
utility.
2.8. Develop control system architecture.
2.9. Provide technical input to National Grid, the local Electrical Utility,
Interconnection application. Interconnection application will be the
responsibility of City of Nashua.
2.10. Develop Cogen Reciprocating Engine bid specification.
2.11.Develop Main Switchgear bid specification.
2.12.Attend one (1) review meeting with local utility, hosted by City of Nashua, as
part of the Interconnection application.
2.13.Attend two (2) design progress meetings with the City of Nashua project team.
2.14.Attend one (1) post bid meeting with cogeneration engine vendor.
2.15.Prepare cogeneration engine bid comparison matrix and recommendation
Waldron, on all of our CHP projects, have followed the approach of specifying the long lead
items early in the process. We typically specify the equipment, review the bids on behalf of
the owner, make purchase recommendations, and develop a conforming specification for
use by the owner in their purchase order. We not only have provided this service for the
owners but also have purchased the long lead equipment on our books as part of our EPC
work. We find the benefits to the project to be as follows:
e Obtain Air Permit early.
e Shortened overall schedule duration. Typical construction starts after initial air
permit approval. With generator bids, emission from the equipment is guaranteed
and therefore reduces emission uncertainty. Similarity, electrical Interconnection
Permit is granted prior to generator synchronization parallel with Utility. With
main switchgear design submittal available as part of the Interconnection
application this will reduce the risk of prolonging the permit application process.
e Reduction in cost risk by securing the price for a significant scope early in the
process.
e Allows the owner to structure a Long Term Service Agreement with the OEM at the
time of the purchase, thus creating the opportunity for a better “buy”.
e Allows for the receipt of detailed vendor drawings before generating the
construction documents. This allows for a more detailed fully coordinated design
resulting in a better “buy” for the CM. Although the design schedule will be
extended but the overall project schedule will be shortened and minimize potential
design change occur during the construction phase due to equipment information
and result in significant increase in cost.
e Lower risk for construction change orders due to the fully coordinated design.
Revised August 28, 2017
VWALDRON
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
3. 90% Design
3.1. Waldron will revise and incorporate the applicable comments to design
documents from the outcome of the 75% Design Phase review meeting.
3.2. Develop piping diagrams - plan, elevation and details.
3.3. Develop ductwork diagrams - plan, elevation and details.
3.4. Develop distribution piping diagrams - plan and details.
3.5. Mechanical installation specifications.
3.6. Develop equipment foundation design and installation notes.
3.7. Develop load flow and short circuit studies.
3.8. Develop Grounding design.
3.9. Cable and conduit routing diagrams.
3.10.Develop relay coordination study.
3.11. Develop conduit block diagrams.
3.12. Develop wire interconnection diagrams.
3.13. Develop switchgear, transformer and electrical control panel specifications.
3.14. Electrical installation specifications.
3.15.Hazardous location plan.
3.16.Control system integration and hardware specifications.
3.17. Building Code Review.
3.18.Attend three (3) design progress meetings with City of Nashua project team
and their representative.
4. 100% Construction Document (CD)
4.1. Waldron will revise and incorporate the applicable comments to design
documents from the outcome of the 90% Design Phase review meeting.
4.2. Develop Arc Flash study (for new CHP installation only)
4.3. Review cogen generator and switchgear vendor submittals.
4.4, Attend one (1) pre-bid conferences with all pre-selected construction bidders
to answer questions concerning bid documents, and prepare and distribute
meeting minutes to all pre-selected equipment and construction bidders
4.5, Answer bid phase equipment and construction RFIs
5. Air Permit Application Support (service provided by Wright-Pierces)
5.1. Review project information including existing air permit, annual monitoring
reports, and emissions data for proposed generators.
5.2. Hold kick-off meeting with Waldron and City of Nashua to review existing air
permit and the impact of generator emissions.
Revised August 28, 2017
WALDRON |
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
5.3. Hold scoping meeting with NHDES to review existing permit and requirements
for submittal on new generators.
5.4. Prepare permit submittal package (assumed Title V permit is not triggered):
5.4.1. Collect information on digester gas characteristics and current
generation rates from city of Nashua.
5.4.2. Collect information of generator emission rates from Waldron.
5.4.3. Collect information on intended digester gas utilization by various
boilers and flare currently permitted to burn digester gas.
5.4.4. Update emission rates from other WWTF sources utilizing digester gas
based on updated characteristics and intended use after generator
upgrade.
5.4.5. Complete Form ARD-1.
5.4.6. Complete Form ARD-2.
5.4.7. Submit draft permitting package to City of Nashua for review.
5.4.8. Address comments and submit package to NHDES. Note: NHDES will
conduct air modeling itself to confirm compliance with criteria and
whether Title V permitting is triggered.
5.5. Review comments from NHDES, if any, and prepare response to comments. If
Title V permitting is triggered, the likely response will be to limit the allowable
annual run time of selected emission source based on input from the City.
6. Construction Administration (Separate Scope of Work)
6.1. Attend one (1) construction kickoff meeting
6.2. Include two (2) site construction visits at the conclusion of Construction and
provide Building Permit Affidavit.
Revised August 28, 2017
WALDRON |
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
Ciarifications and Exemptions
1.
10.
11.
12.
13.
14.
Waldron’s design scope is based on 2 CAT G3406 200kW Model recip engine
generators and the allotted space is sufficient for the 2 CAT G3406 200kW Model
recip engine generator installation and operation. Design will be based on best
available information, not vendor design submittal, for the engine generator and
switchgear.
Evaluation of gas piping, the gas holding tank, and the gas flare are not included, and
would be evaluated in the future.
Wright-Pierce will assist Waldron with evaluation of gas cleaning equipment
upgrades if they prove to be necessary, and with the preliminary and final design
services for the recommended improvements to the gas cleaning or other gas
handling facilities as part of the overall generator upgrade project. However, it is
not possible to quantify the effort required until the evaluation above is completed
No architectural design or building structural design is included. The new CHP
generator will replace the existing CHP generators and will be in the current Energy
Recovery room.
Waldron does not include Value Engineering (VE) in the Scope after issuance of the
90% construction documents.
No changes to Existing fire protection and gas detection systems
City of Nashua will provide the recent 2 years of monthly electric and natural gas
bills and other relevant financial information.
HazOp review is not included
Deflagration Analysis is not included.
Construction Administration including answering RFI, contractor and equipment
submittal review, certify contractor payments or Change Orders, construction
meetings and construction review additional to the site investigation defined in
Paragraph 5 above are not included.
After 100% CD, design changes resulted from equipment vendor design information
is considered as Change of Scope.
Commission and commissioning / startup support is not included.
Equipment Factory Acceptance Test or visits to manufacturing or other facilities is
optional and will be billed per T&M rates.
Environmental and other permit application are not included.
Revised August 28, 2017
WALDRON
SECTION 01150
MEASUREMENT AND PAYMENT
PART 1— GENERAL
1.1
A.
SUMMARY
Under the price specified to be paid for each item, the Contractor shall furnish all
labor, materials, equipment, plant, and perform all operations to complete all work as
indicated and specified. All supervision, overhead items, bond and permit costs,
protection and precautions and all other costs, incidental to the construction work,
complete, and as specified, are also included.
A complete, finished, working job, as intended by the general nature of these
Specifications, shall be produced whether or not any particular wording or direction is
omitted or inadvertently not clearly stated.
Measurement for payment shall be by the Engineer, except where noted elsewhere in
this Specification. Measurement for payment for lump sum items shall be on the
basis of percentage of work complete and in place.
Each unit or lump sum price stated in the Bid shall constitute full compensation as
herein specified for each item of work completed in accordance with the Drawings
and Specifications.
The prices for those items which involve excavation shall include compensation for
transportation and disposal of surplus excavated material at the City landfill and
handling water.
. The prices for all pipe items shall constitute full compensation for furnishing, laying,
jointing, and excavation and backfill; and clean up.
In all items involving excavation, the price shall be based on doing the entire
excavation in earth. Where rock is excavated, the price thereof shall be in addition to
the cost of excavating earth, and no deduction will be made in the amount for earth
excavation.
Unit prices submitted for various items of work will be utilized for determining prices
of any additional work necessary during construction.
Owner reserves the right to delete any item or modify estimated quantities without
penalty. Contractor shall make no claim as to lost profits or added costs due to
quantity adjustments or deletions.
2022 Sewer Replacement Project Measurement and Payment
Nashua, NH 01150 -1
Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
15. Testing of existing digester gas, electrical and mechanical systems are not included.
The design assumes the digester gas quality complies with engine manufacturer’s
fuel specifications.
16. Geotechnical analysis is by others.
17. WWTF will provide all relevant design drawings for existing facility including site
survey information.
Revised August 28, 2017
WALDRON
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