DWU Standard Technical Specifications for Water & Wastewater Construction

236 Pages·2014·1.27 MB·English

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DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

Document Number: DWU-PRO-022-ENG Revision Number: 1
Approved By: Chad Kopecki Effective Date: 9/1/2014
Description of Last
Initial Release
Change:

Document Title: Standard Technical Specifications for Water & Wastewater Constructions

TABLE OF CONTENTS

PREFACE

P.1 Acknowledgements ...............................................................................................P - 1
P.2 Background ...........................................................................................................P - 1

DIVISION 1: GENERAL ITEMS

1.1 Sample Bid .............................................................................................................1.1 - 1
1.2 Submittals ............................................................................................................1.2 - 1
1.3 Approved Equal ....................................................................................................1.3 - 1
1.4 Project Partnering ................................................................................................1.4 - 1
1.5 Pre and Post Construction Video of Project Site ...............................................1.5 - 1

DIVISION 2: WATER PIPELINES

2.1 Fusible Polyvinyl Chloride (PVC) Water/Wastewater Pipe .............................2.1 - 1
2.2 Restrained Joint Polyvinyl Chloride (PVC) Water Pipe ...................................2.2 - 1
2.3 Steel Water Pipe ....................................................................................................2.3 - 1
2.4 Rehabilitation ofExistingWater Main by Cured-In-PlacePipe(CIPP) ...........2.4 - 1

2.5 Rehabilitation ofExistingWaterMain by Pipe Bursting(PB) ...........................2.5 - 1

2.6 Sliplining of Water Main ......................................................................................2.6 - 1
2.7 Temporary Water Main .......................................................................................2.7 - 1

TABLE OF CONTENTS TOC - 1
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

DIVISION 3: WASTEWATER PIPELINES

3.1 Rehabilitation ofExistingWastewaterMain by Cured-In-PlacePipe(CIPP) ..3.1 - 1

3.2 Rehabilitation of Existing Wastewater Main by Pipe Bursting (PB) ...............3.2 - 1
3.3 Recycle/Reclaimed of Water Pipe........................................................................3.3 – 1
3.4 Sliplining of Wastewater Main ............................................................................3.4 - 1

DIVISION 4: WATER APPURTENANCES AND PROCEDURES

4.1 Removal, Handling, Cutting, Disturbance and Disposal of Asbestos
Cement Pipe ...........................................................................................................4.1 - 1
4.2 Horizontal Directional Drilling (HDD) of Water Mains ...................................4.2 - 1
4.3 Electrical Continuity Testing of Water Mains ...................................................4.3 – 1
4.4 Water Meter Vault Protective Lining .................................................................4.4 – 1

DIVISION 5: WASTEWATER APPURTENANCES AND PROCEDURES

5.1 Wastewater Flow Control and Bypass Pumping ...............................................5.1 - 1
5.2 Wastewater Main and Manhole Cleaning ..........................................................5.2 - 1
5.3 Television Inspection of Wastewater Mains .......................................................5.3 - 1
5.4 Manhole Frame Seal .............................................................................................5.4 - 1
5.5 Manhole Protective Lining ...................................................................................5.5 - 1
5.6 Precast Concrete Additive for Wastewater Manhole ........................................5.6 - 1

DIVISION 6: PAVEMENT RESTORATION AND OTHER MISCELLANEOUS ITEMS

6.1 Cement Stabilized Sand Backfill .........................................................................6.1 - 1
6.2 Temporary Paving (Hot or High Performance Mix ..........................................6.2 - 1
6.3 Heavy Vehicular Paving Brick ............................................................................6.3 - 1
6.4 Tree Planting .........................................................................................................6.4 - 1
TABLE OF CONTENTS TOC - 2
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

DIVISION 7: LISTS OF APPROVED MATERIALS

7.1 Approved Materials for Water Distribution System by Trade Name .............7.1-1
7.2 Approved Materials for Wastewater Collection System by Trade Name .......7.2-1

TABLE OF CONTENTS TOC – 3
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

PREFACE

P.1 ACKNOWLEDGMENTS:

This manual replaces first edition of Standard Technical Specifications for Water &
Wastewater Construction Manual by Dallas Water Utilities (DWU) dated August,
2011. The chronological list of events in developing the DWU manual is summarized
as follows:

AUG, 2011: Compilation of various standard specifications into first edition of
the manual.

AUG, 2014: Revision of 2011 manual to include additional specifications on
various water and wastewater trenchless technologies and
rehabilitation methods.
P.2 BACKGROUND:
The intent of this manual is to provide standard technical specifications for various
commonly used items which may not be covered in details under the latest editions of
Public Works Construction Standards by North Central Texas Council of
Governments (NCTCOG), City of Dallas Addendum to NCTCOG and Standard
Drawings for Water & Wastewater Construction by Dallas Water Utilities (DWU).

This technical resource is not intended to substitute for any professional engineering
judgment by the designer. Any appropriate modifications shall be incorporated into
the contract document upon approval by Owner. Unless otherwise specified in the
contract document, this manual shall be used by the Contractor in the construction of
water and wastewater mains owned and operated by DWU. In case of conflict
between contract documents, priority of interpretation shall be in the following order:
• Project Plans & Specifications
• DWU Standard Technical Specifications for Water and Wastewater
Construction, Latest Edition
• DWU Standard Drawings for Water & Wastewater Construction, Latest
Edition
• City of Dallas Addendum to NCTCOG, Latest Edition
• Public Works Construction Standards by NCTCOG, Latest Edition

In addition, lists of approved materials for water distribution and wastewater
collection systems are included in this document. Unless otherwise specified in the
project plans and/or specifications, these materials can be considered by the
Contractor contingent upon approval by the Owner.
PREFACE P - 1
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

This manual is written by Engineering Services, Dallas Water Utilities. Any questions
or suggestions regarding this manual should be forwarded to Engineering Services,
Dallas Water Utilities. This manual is available on the internet at:
http://www.dallascityhall.org/dwu/dwu_design_standards.html

PREFACE P - 2
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

SECTION 1.1

SAMPLE BID

ITEM QUAN- DESRIPTION UNIT TOTAL
UNIT
NO. TITY AND PRICE IN WORDS PRICE AMOUNT
3550 2 EA Removal of Internal Obstruction in 1,000.00 2,000.00
Existing 6” Wastewater ain,
complete in place, the sum of

One Thousand
DOLLARS

and No
SSS
CENTS
per each
AAA
3551 2 EA Removal of Internal Obstruction in 1,500.00 3,000.00
Existing 8” Wastewater main,
complete in place, the sum of
MMM
Fifteen Hundred
DOLLARS
PPP
and No
CENTS
per each
LLL
3560 4 EA Furnish and place Connection to 1,500.10 6,000.40
Existing Manhole, complete in
EEE
place, the sum of

One Thousand Five Hundred
DOLLARS

and Ten
CENTS
per each

THIS PAGE TO BE USED AS AN EXAMPLE FOR COMPLETING
PROPOSAL PAGES

NOTE: The Contractor’s Unit Price In Words, Unit Price In
Numbers And Total Amount Must Be Shown For
Each Bid Item
SAMPLE BID 1.1 - 1
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

SECTION 1.2

TECHNICAL SPECIFICATION FOR
SUBMITTALS

PART 1: GENERAL

1.1 Data Required
The Contractor shall furnish engineering data covering all materials and equipment in
the contract. The data should be prepared and transmitted promptly following
execution of the general contract. Delays due to failure to provide timely submittal
will not result in a time extension.

1.2 Type of Data
As applicable, the following types of data will be required:
• Fabrication, Erection/ Placement Details:
- Laying plans for large diameter pipelines
- Drawings, lists and schedules for special structures

• Outline, Dimension, Assembly and Installation Drawings
- Terminal connection diagrams for all electrical power and lighting, and for all
types of instrumentation and control circuits.

• Catalog Sheets with clearly indicating items to be used
• Specification Sheets
• Written Statements or Certifications
• Laboratory, Shop or Mill Test Reports
• Basis of Design and Design Calculations
• Experience and Facilities Brochures.
• Samples
• Parts Lists
• Instruction and Maintenance Manuals

SUBMITTALS 1.2 - 1
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

1.3 Information to be Included:
All data needed to determine the following facts shall be submitted:

1.3.1 Conformance to specifications, including: kind, type, size, arrangement, finishes, and
operation of component materials, and devices.

1.3.2 Conformance to plans, including: dimensions, orientation, appearance, external
connections and anchorages, installation clearances.

1.3.3 Specific purpose or design conditions and adequacy to meet same: weights, dynamic,
loads, supports required, operating characteristics.

1.3.4 Coordination with other work, including: items needed by this trade, but furnished by
others, and information needed by others to perform their part.

1.3.5 Exceptions to or deviations from specified requirements if any, and reasons for same.

1.3.6 Delivery Date:

• This should be stated as a firm date of delivery, not measured from approval of
drawings to date of shipping. For this purpose the time taken by the Owner to
process data may be taken as not exceeding ten (10) working days. However, the
Owner does not assume responsibility for correctness or completeness of the data.

• The Contractor should determine that proposed delivery dates will not cause delay
or result in failure to complete the project on time.

• No extension of time or waiver of liquidated damages will be granted due to
failure to deliver on time unless the Contractor presents written evidence
approved by the Owner that favorable delivery is not obtainable for an acceptable
item.

• Such evidence will be considered as a basis for extension of time only when
presented promptly after award of contract and approved by the Owner.

SUBMITTALS 1.2 - 2
DWU STANDARD TECHNICAL SPECIFICATIONS AUGUST, 2014

PART 2: SUBMITTAL APPROVAL PROCESS

2.1 Routing of Submittal
Approval data and routine correspondence should be routed as follows:

• Contractor to Owner (5 copies)
- DWU Project Manager to Designer
- DWU Project Manager to Operation Divisions (Distribution and Wastewater
Collection Divisions)

• Owner to Contractor (2 copies)
- DWU Project Manager to Contractor

2.2 Address for Communications
DWU Project Manager
Dallas Water Utilities
2121 Main Street, Suite 300
Dallas, Texas 75201

2.3 Checking and Review of Data Approval
• The Contractor should check all data for correctness and completeness. He will
note any exceptions or discrepancies to be approved or verified by the Owner.

• The Owner will review the data for general conformity to the plans and
specifications. He will comment on items called to his attention for approval or
verification. Approvals will be based on this review and do not constitute a
blanket approval of substance, fit or function.

• The Owner Engineer may at his discretion check dimensions, samples and details
as a service as needed. Any discrepancies found thus will be noted for
verification by the Contractor.

SUBMITTALS 1.2 - 3