Weston & Sampson

3955 Faber Place Drive, Suite 200

North Charleston, SC 29405

Phone 843-881-9804 www.westonandsampson.com

DORCHESTER COUNTY, SOUTH CAROLINA

TECHNICAL SPECIFICATIONS

FOR CONSTRUCTION OF:

PUMP STATION 10

FORCE MAIN REPLACEMENT

March 2026

Bid No. 2026-XX

Dorchester County Water and Sewer 235 Deming Way

Summerville, SC 29483

Phone: (843) 832-0075

W&S Job No. ENG24-1373

FOR BID

DORCHESTER COUNTY WATER AND SEWER

PUMP STATION 10 FORCE MAIN REPLACEMENT

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DORCHESTER COUNTY WATER AND SEWER Table of Contents

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TABLE OF CONTENTS

TECHNICAL SPECIFICATIONS

DIVISION 01

01 00 00 General Requirements

01 12 16 Work Sequence

01 14 19.13 Temporary Bypass Pumping System

01 14 19.25 Dust Control

01 29 73 Schedule of Values

01 32 19 Submittals Schedule

01 57 19 Temporary Environmental Controls

01 71 23.16 Construction Surveying

01 74 00 Cleaning and Waste Management

01 78 00 Project Closeout

01 78 23 Operation and Maintenance Data

01 91 00 Commissioning

DIVISION 03

03 34 00 Low Density Cellular Concrete

DIVISION 31

31 00 00 Earthwork

31 11 00 Clearing and Grubbing

31 23 19 Dewatering

31 23 23.33 Flowable Fill

DIVISION 32

32 01 17 Paving Repair

32 12 00 Paving

32 92 19 Seeding

DIVISION 33

33 01 30.12 Acceptance Testing for Sanitary Sewers

33 05 07.13 Utility Horizontal Directional Drilling (HDD)

DORCHESTER COUNTY WATER AND SEWER Table of Contents

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33 30 00 Sanitary Gravity Sewer Lines

33 31 13.19 Ductile Iron Pipe and Fittings for Sanitary Sewer Force Mains

33 31 13.20 Fusible Polyvinyl Chloride (FPVC) Pipe for HDDs

33 31 13.37 Valves and Appurtenances for Wastewater Work

33 34 00 Sanitary Sewer Force Mains

APPENDICES

Appendix A Permits

Appendix B Geotechnical Report

Appendix C Underground Utility Records

Appendix D Wetland Report

Appendix E Dorchester County utility Pavement Cut and Repair Guidelines

Appendix F SUE A Report

END OF SECTION

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DORCHESTER COUNTY WATER AND SEWER General Requirements

01 00 00 - 1

SECTION 01 00 00

GENERAL REQUIREMENTS

PART 1 GENERAL

1.01 SPECIFICATIONS EXPLANATION

A. Attention is directed to the fact that the detailed specifications and separate sections may be written in short or abridged form. In regard to every section of the specifications and all parts thereof, mentioned therein or indications on the drawings or articles, materials, operations or methods requires that the Contractor:

1. Provide each item mentioned and indicated.

2. Perform (according to conditions stated) each operation prescribed.

3. Provide therefore all necessary labor, equipment and incidentals.

B. Whenever in these specifications or on the drawings the words "directed", "required", "permitted", "ordered", or words of like import are used, it shall be understood that the directions, requirements, permission or order of the Engineer is intended; and similar words "approved", "acceptable", "satisfactory", or words of like import shall mean approved, acceptable to, or satisfactory to the Engineer.

C. Notwithstanding the appearance of such language in the various divisions of the specifications as "The Plumbing Contractor", "The Electrical Contractor", "The

Roofing Contractor", etc., the Contractor is responsible to the Owner for the entire

Contract and the execution of all work referred to in the Contract Documents.

1.02 SANITARY FACILITIES, TEMPORARY

A. Do not allow any sanitary nuisances to be committed in or about work; contractor shall comply with all OSHA and South Carolina Department of Health and Environmental

Control Regulations

1.03 TEMPORARY UTILITIES

A. Contractor shall furnish water, electricity, and heating fuel necessary for construction.

Contractor shall provide necessary temporary piping, faucets, valves, wiring, switches, outlets, etc., to carry services to the work. The Contractor shall make all temporary utility connections for his own use and remove temporary services upon completion of

Contract in accordance with the requirements of the individual utility. Metering devices shall be installed on all utilities at the Contractor’s expense. Metered usage will be paid for by the Owner using Contractor’s retainage funds. All fuel tanks shall be filled for the Owner upon completion of the Contract at the Contractor’s expense. The site utilities will remain under DCWS account and be paid for by DCWS during construction.

01 00 00 - 2

1.04 RED LINE DRAWINGS

A. Contractor shall submit red-line markup drawings with applications for payment. Red line drawings shall show which section(s) of the project have been installed in the current pay period and shall show any deviations from the plan drawings including, but not limited to: LF of pipe installed, pipe depth, valve placement, and horizontal or vertical bends installed.

1.05 AS-BUILT DRAWINGS

A. The Contractor shall, upon completion of the work, furnish an as-built set of drawings stamped by a PLS with CAD files showing all work actually installed as a part of the project as specified under those sections of the specifications, and deliver them to the

Engineer for review.

1. As-Built Record Drawings shall meet the following minimum required conditions:

a. Plan View for all wastewater systems.

b. Profile View for all wastewater mains of any size and water mains 12” and larger.

c. Plan view of the pump station site.

d. Cross section of the pump station wetwell.

e. Property lines, block designations, lot numbers and, when available, TMS numbers.

f. Station and state plane coordinates at all valves, manholes, fire hydrants, bends, blow-offs, tees, reducers, increasers, water and sewer services and air release valves.

g. Line lengths, connection points and termination points.

h. Valves located by distance to two permanent reference points.

i. Indicate top elevations and invert elevations of manholes.

j. Reference benchmarks on drawings and elevation datum used

k. All recorded plat and easement information.

l. Drawings clearly legible and of good quality.

m. Engineer’s certification, seal, and signature. The engineer may use the following statement: “It is my opinion that the water/sewer system shown hereon has been

01 00 00 - 3 constructed substantially in accordance with the plans and specifications approved by Dorchester County Water and Sewer and SCDES.

B. The following is an example of the Dorchester County Water & Sewer Construction and Record Drawing Submittal Checklist. Contractor is to ensure all drawing requirements are met. The form is available on the DCWS website.

01 00 00 - 4

01 00 00 - 5

01 00 00 - 6

01 00 00 - 7

1.06 SHOP DRAWINGS

A. Shop Drawings shall be dated and contain: Name of project; description and names of equipment, materials, and items; and complete identification of locations at which material or equipment is to be installed, reference to the section of the specifications where it is specified and drawing number, where shown. In addition to the above, the

Shop Drawings shall:

1. Show complete information for checking and for fabrication, installation and erection, without reference to other drawings or notes;

2. Be of drafting line work and lettering that is easily readable under field conditions;

3. Have plans oriented the same as plans on the Contract Drawings;

4. List grade, class, or strength of materials;

5. Be checked, approved, stamped, and initialed by the Contractor;

6. Be checked and coordinated with other phases of the work, by a person in the contractor's employ who is experienced and qualified in the checking and coordination of shop drawings.

B. Shop Drawings shall not, after having been submitted, be later issued with revised or additional material, except for items corrected during the checking by the Contractor or reviewed by the Engineer.

C. The following notation will be used by the Engineer during review:

1. No exceptions taken. (If checked here, fabrication may be undertaken.)

a. NOTE:

1) Acceptance does not authorize change to contract sums unless stated in a separate letter or by change order.

2) Acceptance does not relieve the Contractor of the responsibility of completing work as described in the Contract drawings and specifications.

All changes shall be submitted to the Engineer for review and approval as a Request for Information (RFI) or Change Order.

2. Exceptions noted. (If checked here, fabrication may be undertaken. It is the

Contractor’s responsibility is to coordinate markings noted.)

3. Revise and Resubmit.

4. Rejected-See Remarks.

01 00 00 - 8

D. Engineer review is for conformance with the design concept of the project and compliance with the information given within the Contract Documents only. The

Contractor is responsible for dimensions being confirmed and correlated at the site; for information that pertains solely to the fabrication processes or to means, method, techniques, sequence, and procedures of construction; and for coordination of the work of all trades.

E. Failure to note a noncompliance will not prevent later rejection when the noncompliance is disclosed.

F. Submission of Shop Drawings shall be accompanied by a transmittal letter containing project name, Owner’s project number, Contractor's name, and number of drawings, title, and other pertinent data.

G. The Contractor shall promptly submit to the Engineer electronic copies in PDF format as required by the Contract Documents in accordance with the aforesaid schedule so as to cause no delay in his work or in work of any other Contractors.

H. For standard items not requiring special shop drawings for manufacture, submit an electronic copy of manufacturer's product data showing illustrated cuts of the items to be furnished, scale details, size dimensions, performance characteristics, capabilities, wiring diagrams, control, and all other pertinent information.

I. The Contractor shall:

1. Check, coordinate, correct, stamp, date, and sign all copies of each drawing, and deliver them to the Engineer for his review;

2. Identify the set of drawings he has checked; this set shall be shown by check marks or correction that every item has been verified and with the requirements of the

Contract Documents.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

DORCHESTER COUNTY WATER AND SEWER Work Sequence

01 12 16 - 1

SECTION 01 12 16

WORK SEQUENCE

1.01 CONTINUITY OF PUMPING

A. The existing wastewater pump station is currently and continuously receiving and pumping sewage, and those functions shall not be interrupted except as specified herein. The Contractor shall coordinate the work to avoid any disruption in the capability to pump influent sewage, whether with the existing equipment, the proposed pumping equipment, or through temporary portable pumping equipment.

B. The Contractor shall be responsible for installing, operating and maintaining their own bypass pumping when needed to connect to existing facilities, or transfer service from existing to proposed equipment. Sewage bypass pumping shall be in accordance with Section 01 14 19.13 – Temporary Bypass Pumping System.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION

3.01 GENERAL

A. The Contractor shall be responsible for scheduling its activities and the activities of any subcontractors involved, to meet the completion date, or milestones, established for the contract. Scheduling of the work shall be coordinated with the Owner and Engineer.

Updated project schedules shall be submitted to the Engineer prior to each month’s progress meeting for inclusion in the meeting agenda. An updated construction schedule shall also be submitted with each Application for Payment.

B. The Construction Sequence Requirements shall be used by the Contractor to form a complete schedule for the project, which shall be coordinated with the Owner and

Engineer. Prior to performing any work at the site, the Contractor shall submit a detailed work plan to the Engineer for review. The plan shall describe the proposed sequence, methods, and timing of the work in accordance with Section 01 32 19 -

Submittals Schedule.

3.02 CONSTRUCTION SEQUENCING REQUIREMENTS

A. Refer to Construction Drawings for suggested sequence of construction

B. Contractor may submit an alternate sequence of construction from the Contract

Documents for review and approval by the engineer. Alternate sequence shall be reviewed and approved prior to commencing the relevant portion of work.

DORCHESTER COUNTY WATER AND SEWER Work Sequence

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DORCHESTER COUNTY WATER AND SEWER Temporary Bypass Pumping System

01 14 19.13 - 1

SECTION 01 14 19.13

TEMPORARY BYPASS PUMPING SYSTEM

1.01 WORK INCLUDED

A. This Section includes furnishing of all materials, labor, equipment, power, and maintenance, to implement a temporary pumping system for the purpose of diverting existing sanitary sewer flows around the work area for the duration of the project.

B. The design, installation and operation of the temporary pumping system shall be the

Contractor’s responsibility. The Contractor shall employ the services of a vendor firm who can demonstrate to the Engineer that it has the required expertise in the design and operation of temporary bypass pumping systems. The vendor firm shall provide at least five references of projects similar in size and complexity to this project that have been performed by the firm within the past three years.

C. The by-pass system shall meet the requirements of all codes and regulatory agencies having jurisdiction.

1.02 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL

SPECIFICATIONS, SUBMIT THE FOLLOWING:

A. The Contractor shall submit a detailed description of the proposed pumping system stamped by a Professional Engineer in the State of South Carolina and submit it and the vendor’s references.

B. The Contractor shall submit to the Engineer detailed plans and descriptions outlining all provisions and precautions to be taken by the Contractor regarding the handling of existing sanitary sewer flows. This plan must be specific and complete, including such items as schedules, locations, elevations, capacities of equipment, materials and all other incidental items necessary and/or required to ensure proper protection of the facilities, including protection of the access and bypass pumping locations from damage due to the discharge flows, and compliance with the requirements and permit conditions specified in these contract documents. A back-up fuel tank is required. No construction shall begin until all provisions and requirements have been reviewed by the Engineer. The plan shall include but not be limited to the following:

1. Staging areas for pumps

2. Plugging methods and types of plugs

3. Documentation that pumps meet or exceed Final Tier 4 emissions as specified by the Environmental Protection Agency standards. Shop test results may be requested at the Engineers discretion at no additional cost to the Owner.

01 14 19.13 - 2

4. Number and size of pumps and basis of selection

5. Number, size, material, method of installation, and location of suction piping

6. Number, size, material, method of installation, and location of discharge piping

7. Bypass pump sizes, capacity, number of each size to be on site, and power requirements

8. Calculations of static lift, friction losses, and flow velocity (pump curves showing pump operating range are to be submitted). All hydraulic calculations and drawings shall be provided by the Bypass Pumping Vendor and stamped by a registered

Professional Engineer licensed in the State of South Carolina.

9. Method of protecting discharge manholes or structures from erosion and damage

10. Method of protecting pumping equipment and securing the bypass pumping site from theft, damage and general safety concerns. Site fencing shall ensure safety of the general public as well as secure the site from theft and/or damage. Include proposed gate dimensions and location.

11. Sections showing suction and discharge pipe depth, embedment, select fill, special backfill, and restraint

12. Method of noise control for each pump and/or generator, with external dB valve

13. Any temporary pipe supports and anchoring required

14. Design for access to bypass pumping locations indicated on the drawings

15. Selection of bypass pumping pipe size and material (include method of connections to pump and other piping)

16. Schedule for installation of and maintenance of bypass pumping lines

17. Describe how bypass pumping system will be monitored and alarmed

18. Describe how bypass pumping system will be controlled

19. Demonstrate upstream manholes will not overflow from surcharging and that upstream service connections will not be surcharged. Provide proposed locations and elevations for floats and associated equipment.

20. Demonstrate how bypass piping will be identified and protected in the field from accidental damage from equipment operators.

21. Show discharge from force main will not surcharge downstream discharge manhole

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22. Show 100% standby for pumps, power, controls, suction piping, and discharge piping to the bypass pipe.

23. Show force main pipe material and thickness can withstand all normal operating and surge pressures with a safety factor of 2.0

24. Denote any conditions that will cause pumps to lose suction lift (prime) and describe procedures to rectify

25. Show that the emergency switchover from primary to secondary pumping will be automatic should equipment fail

26. Show emergency plan to be used if flooding occurs at work site

27. Show suction and discharge piping is protected from possible damage from varying creek flows and construction activities

28. Show any planned shifting of bypass equipment during construction

C. Sewer Spill Response Plan: Should a sewer spill occur, the procedure below shall be followed by the Contractor and be included as part of the bypass pumping plan. The

Contractor is responsible to routinely provide a communication update on the status of the spill containment activities throughout completion of the clean-up.

1. Notification Sequence:

a. Notify DCWS Maintenance Supervisor, Otis Ward, at 843-832-0075

b. Notify project representatives or their substitute:

1) DCWS Representative, TBD

2) Resident Project Representative, TBD

3) Paige Lux, LuxP@wseinc.com, 843-881-9804

2. When to notify: Immediately upon discovery.

3. What information to provide:

a. Initial Information:

1) The location of the spill

2) When it was discovered

3) What is the plan for containment

b. Containment:

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1) Time containment was achieved

2) Pictures that were taken at arrival and containment

c. Repair/Replacement:

1) Actions taken to repair/replace the system

2) What measures are being implemented to prevent a reoccurrence

d. Other:

1) Always photograph the site at arrival, once contained, and after cleanup

2) If a property owner or citizen discovers the spill, provide their contact information and any details they have about the spill

e. Do Not Provide:

1) Any information other than listed above

2) Any information that you did not witness

3) Any information about amount of sewer spilled (this can be calculated by

Engineer based on information/pictures provided above.)

1.03 RELATED WORK:

A. Section 01 12 16 - Work Sequence

PART 2 PRODUCTS

2.01 PUMPING EQUIPMENT

A. GENERAL:

1. This sanitary sewer pump station is part of a pumping system that must be kept in service at all times. It is essential to the operation of the existing wastewater system that there shall be no interruption in the conveyance of wastewater throughout the duration of the project. To this end, the Contractor shall provide, maintain and operate all temporary facilities such as dams, plugs, pumping equipment (both primary and back-up units as required), conduits, all necessary power, and all other labor and equipment necessary to intercept the wastewater flow before it reaches the point where it would interfere with the work, carry it past the work and return it to the existing system downstream of the work.

2. It is the Contractor's responsibility to provide equipment that is adequate for the performance of the Work under this Contract within the time specified. All equipment shall be kept in satisfactory operating condition, shall be capable of

01 14 19.13 - 5 safely and efficiently performing the required Work, and shall be subject to review by the Owner's representative at any time within the duration of the Contract. All

Work hereunder shall conform to the applicable requirements of the OSHA

Standards for Construction.

3. Wastewater system operational requirements take precedence over Contractor activities. Therefore, interruption of wastewater system operations must be coordinated and are subject to the operational requirements of the Owner.

Contractor shall assume that any interruption of wastewater system operations may be delayed by the Owner for up to one (1) week from the requested time due to operational constraints at no additional cost to the Owner.

4. The Contractor shall provide for utilities and services for its own operations. The

Contractor shall furnish, install and maintain all temporary utilities during the contract period including removal upon completion of the Work.

5. All pumps used shall be centrifugal, end suction, fully automatic self-priming units that do not require the use of foot-valves, diaphragm pumps, isolation valves or vacuum pumps in the priming system. The pumps may be electric or diesel powered. All pumps used must be constructed to allow dry running for long periods to accommodate the cyclical nature of bypass flows. The pumps shall not be hydraulic submersible type.

a. All pumps shall be provided by Godwin Pumps of America, Inc., (843) 818-

2266; Thompson Pump, (843) 879-0393; Sunbelt Rentals, (843) 797-8881,

(843) 494-9009; Rain for Rent, (843) 851-6137; or approved equal.

b. Contractor shall be responsible for providing and storing a sufficient quantity diesel fuel on-site to operate the secondary pump as needed for the duration of the temporary bypass pumping period. All fuel shall be stored outside of the floodplain in locations approved by the Engineer and Owner.

c. Contractor shall check the pump fuel levels and shall re-fill the tanks to full capacity -as needed to maintain compliance with the approved bypass pumping plan.

6. Pumps shall be equipped with sound attenuation equipment capable of reducing noise to no more than 65 dB as measured within close proximity (+/- 30’) to the pumping equipment. The Contractor shall take any and all additional measures as necessary to maintain this maximum decibel level for each and every bypass pumping location.

7. All pumps used must be constructed to allow dry running for long periods of time to accommodate the cyclical nature of the flows.

8. Each pump and driver shall be rated for continuous duty operation over the specified range of conditions without cavitating or overheating, and without excessive vibration or noise. In addition, each pump and driver shall be rated to

01 14 19.13 - 6 operate intermittently at shut-off head against a closed discharge valve for periods of not less than 5 minutes without excessive cavitation, overheating, or vibration.

9. Furnish each pump with the necessary stop/start controls.

10. Contractor will not be permitted to stop or impede the main flows under any circumstances.

11. All pumps shall be equipped with a call box.

12. All backup and spare equipment, as required by these specifications, shall meet the same requirements of the primary equipment.

13. Discharge Piping - in order to prevent the accidental spillage of flows, all temporary discharge systems shall be constructed of rigid pipe with positive, restrained joints.

Under no circumstances will aluminum “irrigation” type piping or glued PVC pipe be allowed.

14. Allowable piping materials will be steel pipe, ductile iron pipe, or fused, high-density polyethylene pipe.

15. Each pump shall have a separate control panel. The bypass pumping system shall be equipped with a Mission Box Product MyDro M850 or approved equal. At a minimum, the follow function descriptions shall be included as part of the control system for each pump: Pump On, Pump Off, High Water Alarm, Float Elevations, Flow Meter Data (flow rate) and Discharge Pressure.

16. Provide pressure and vacuum gauges on the suction and discharge headers.

17. Provide pressure switches to start and stop the pumps and a pressure transmitter to vary the speed of the pumping units.

18. Provide flowmeter, telemetry, and automatic transfer switch to change from primary to secondary pump.

19. The Owner and Engineer will have full access to telemetry data.

20. The bypass pumping plan will address how services will be kept in operation until construction operations can reconnect them to the system. All temporary facilities associated with services shall be submitted to the Engineer for review and approval prior to commencing bypass operations for services.

2.02 SYSTEM DESCRIPTION:

A. DESIGN REQUIREMENTS:

1. Bypass pumping systems shall have sufficient capacity to meet flow requirements as stated in the Drawings. The Contractor shall provide all pipeline, plugs, pumps of

01 14 19.13 - 7 adequate size to handle peak flow, and discharge piping to ensure that the total flow can be safely diverted around the area of work. Bypass pumping system will be required to operate 24 hours per day.

2. The Contractor shall have adequate standby power and pumping equipment available and ready for immediate operation and use in the event of an emergency or breakdown. One standby pump for each size pump utilized shall be installed at the mainline flow bypassing locations, ready for use in the event of primary pump failure. An extra back-up fuel tank on site is required.

3. Bypass pumping system shall be capable of bypassing the flow around the work area and of releasing any amount of flow up to full available flow into the work area as necessary for satisfactory performance of work.

B. PERFORMANCE REQUIREMENTS:

1. It is essential for the protection of the public safety and private property that there be no interruption in the flow throughout the duration of the project. To this end, the Contractor shall provide, maintain and operate all temporary facilities such as dams, plugs, pumping equipment (both primary and back-up units as required), conduits, all necessary power, and all other labor and equipment necessary to intercept the wastewater flow before it reaches the point where it would interfere with his work, carry it past his work and return it to the existing force main downstream of his work.

2. The design, installation and operation of the temporary pumping system shall be the

Contractor’s responsibility. The bypass system shall meet the requirements of all codes and regulatory agencies having jurisdiction.

3. The Contractor shall provide all necessary means to safely convey the sanitary sewer flow past the work area. The Contractor will not be permitted to stop or impede the flows under any circumstances.

4. The Contractor shall maintain flow around the work area in a manner that will not cause surcharging or significant level variations in the existing manholes, and that will protect public and private property from damage and flooding.

5. The Contractor shall protect water resources, wetlands and other natural resources.

6. The Contractor shall be responsible to meet noise requirements (65dbA @ generator). All diesel driven primary and standby pumps shall be sound attenuated.

The use of Critical Silenced Canopy Pumps or acoustical Whisper Pac enclosures for sound attenuation is required.

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PART 3 EXECUTION

3.01 PREPARATION

A. The Contractor is responsible for locating any existing utilities in the area where the

Contractor selects to locate the bypass pumps and pipelines. The Contractor shall locate his bypass pipelines to minimize any disturbance to existing utilities and shall obtain approval of the pipeline locations from the Owner and the Engineer. All costs associated with relocating utilities and obtaining all approvals shall be paid by the

Contractor under the unit price pay item for Temporary Bypass Pumping.

B. During bypass pumping operations, the Contractor shall protect the wastewater system, including the sanitary sewer and manholes, from damage inflicted by his equipment.

The Contractor shall be responsible for all physical damage to the wastewater system caused by human or mechanical failure.

C. Contractor shall keep spare parts for pumps and piping on-site as requested. Adequate hoisting equipment for each pump and accessories shall be maintained on the site.

D. The Contractor shall exercise caution and comply with OSHA requirements when working in the presence of gases, combustible or oxygen-deficient atmospheres, and confined spaces.

3.02 INSTALLATION AND REMOVAL

A. The temporary bypass pumping system shall be tested before placing the system in operation. Testing periods shall occur only between the hours of 8:30 a.m. and 3:00 p.m., Monday through Thursday. Testing of bypass pumping system shall NOT be allowed Friday through Sunday, on the Owner’s scheduled Holidays, or on the day immediately prior to an Owner’s scheduled Holiday. In addition, testing of bypass pumping system shall only be performed during the Owner’s normally scheduled work days. Testing shall include leakage testing, pressure testing, and operational testing.

1. Leakage and pressure test: Contractor shall perform leakage and pressure testing for a minimum of two (2) hours on the pump duty suction piping and duty discharge piping. Contractor shall then remove the duty piping and shall install the standby suction piping and standby discharge piping and perform the same test for an additional two (2) hours.

2. Operation test: Contractor shall operate the temporary bypass pumping system for as long as necessary to demonstrate reliable operation of the entire system, including but not limited to pumps and controls, to the satisfaction of the Owner.

B. Plugging or blocking of wastewater flows shall incorporate primary and secondary plugging devices. When plugging or blocking is no longer needed for performance of the work, the plugs are to be removed in a manner that permits the wastewater flow to slowly return to normal without surge, surcharging, or causing other major disturbances downstream.

01 14 19.13 - 9

C. At the conclusion of the bypass pumping operation and once written permission is granted by the Owner and Engineer, Contractor shall remove all temporary bypass components and restore the site to original conditions to the satisfaction of the Owner and Engineer.

3.03 QUALITY CONTROL AND MAINTENANCE

A. Testing: Contractor shall perform leakage and pressure tests of the bypass pump suction and discharge piping using clean water prior to actual operation. Low pressure air test at 5 psi shall be conducted or the pipe is to be filled with clean water and inspected for leaks. The Engineer will be given 24 hours notice prior to testing.

B. Inspection: During days the Contractor is on site and performing work under normal working days, the Contractor shall inspect the bypass pumping system a minimum of twice (2) per day, approximately twelve (12) hours apart to ensure that the system is working correctly. For non-working days, the Contractor shall inspect the bypass pumping system a minimum of twice (2) per day, at least twelve (12) hours apart or as often as necessary to ensure full fuel tanks for the bypass pumps. For all inspections, the Contractor shall digitally log into the mission box as well as keep a written copy of the bypass system inspection results. The Owner and Engineer reserve the right to attend the inspection with the Contractor as well as review any inspection reports.

C. Maintenance Service: Contractor shall insure that the temporary pumping system is properly maintained, and a responsible and competent mechanic/operator shall be on call at all times.

3.04 SEQUENCE OF CONSTRUCTION

A. Contractor shall propose a Sequence of Construction incorporating all constraints detailed in this Section and shall secure concurrence of Owner prior to starting work.

B. The Contractor shall submit a construction plan and schedule, which details the methods, means, techniques, and sequences to be used to establish a base element of surety against a wastewater spill, to the Engineer for review and approval by the Owner at least two (2) weeks prior to any connections to existing pipes or structures. Such plan shall provide assurance against a wastewater spill, with at least one level of backup.

Any and all fines or fees imposed upon the Owner resulting from spills or process interruptions shall be assessed solely upon Contractor. One week prior to connections being made to existing structures or pipes, a coordination meeting shall be held between the Contractor, Construction Manager, Engineer, and Owner to discuss the construction plan previously submitted by the Contractor.

C. Schedule of construction, interconnecting details, and other revisions necessary for proper interfacing of the Work are to be subsequently modified by Contractor accounting for results of said coordination meeting. The Engineer and Owner are to be notified 24 hours prior to any actual interruptions or connections being made. Begin no work prior to securing Owner’s approval of respective connection plan and work schedule.

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DORCHESTER COUNTY WATER AND SEWER Dust Control

01 14 19.25 - 1

SECTION 01 14 19.25

DUST CONTROL

PART 1 GENERAL

1.01 DESCRIPTION:

A. This Section specifies requirements for controlling dust generated during work of this Contract. Work activities requiring special attention to dust control include building demolition, stockpiling, compacting of debris, loading and removal of demolition debris from the site, and earthwork.

B. The Contractor is responsible for control of dust at all times during work of this Contract, 24 hours per day, 7 days per week, including non-working hours, weekends, and holidays.

1.02 RELATED WORK:

A. Section 01 57 19 - Temporary Environmental Controls

B. Section 31 00 00 - Earthwork

1.03 REGULATORY REQUIREMENTS:

A. The Contractor shall perform all work specified under this Section in compliance with the South Carolina Department of Health and Environmental Control, Regulation 61-62 Air Pollution Control Regulations and Standards.

B. Work of this Contract shall be conducted in a manner that will not result in excessive particulate matter emissions, nuisance dust conditions, PM10 (particulate matter with an aerodynamic diameter less than or equal to 10 microns) emissions, or PM10 concentrations exceeding the South Carolina and National Ambient Air Quality Standard of 150 g/m3 on 24-hour average basis.

1.04 SUBMITTALS:

A. Contractor shall submit a Dust Control Plan that outlines in detail the measures that it will implement to comply with this Section, including suppression, wind screens and barriers, prevention, cleanup, and other measures. Plan shall be submitted to the Engineer within fifteen calendar days following the date of the Notice to Proceed.

B. Contractor shall submit to the Engineer product literature and Material Safety Data Sheets for any dust suppression wetting agents and stabilizers that the Contractor proposes to use.

Section 01 57 19 - Temporary Environmental Controls.docx Section 31 00 00 - Earthwork.docx

01 14 19.25 - 2

PART 2 PRODUCTS

2.01 DUST SUPPRESSION AGENTS:

A. Dust suppression wetting agents shall be water soluble, non-toxic, non-reactive, non-volatile, and non-foaming.

B. Soil stabilizer shall be a sprayable organic or inorganic tackifier.

2.02 BARRIERS, SCREENS, AND COVERS:

A. Wind screens shall be a durable fabric mesh of 50 percent porosity, attached to demolition site fence.

B. Wind barriers shall be solid wood fences, solid durable fabric attached to temporary site fence, or other solid barriers intended to block the passage of wind.

C. Covers for stockpiles shall be plastic tarps. Contaminated soil covers shall be 20-mil.

polyethylene sheeting or 10-mil. nylon reinforced polyethylene sheeting. The stockpile shall be placed on 40 mil. polyethylene sheeting.

2.03 CALCIUM CHLORIDE:

A. Calcium chloride shall conform to the requirements of AASHTO-M 144, Type I or Type II and Specification for Calcium Chloride, ASTM D98. The calcium chloride shall be packaged in moisture proof bags or in airtight drums with the manufacturer, name of product, net weight, and percentage of calcium chloride guaranteed by the manufacturer legibly marked on each container.

B. Calcium chloride failing to meet the requirements of the aforementioned specifications or that which has become caked or sticky in shipment, may be rejected by the Engineer.

2.04 WATER:

A. Water shall not be brackish and shall be free from oil, acid, and injurious alkali or vegetable matter.

PART 3 EXECUTION

3.01 CONSTRUCTION SITE DUST CONTROL – GENERAL:

A. Wet suppression shall be used to provide temporary control of dust. Several applications per day may be necessary to control dust depending upon meteorological conditions and work activity. The Contractor shall apply wet suppression on a routine basis as necessary or required by the Engineer, to control dust. At a minimum, wet suppression shall be applied to demolition debris, excavated material, aggregate piles, and exposed soils and dirt.

01 14 19.25 - 3

1. Wet suppression consists of the application of water or a wetting agent in solution with water. Ensure wetting agent is not used on plantable soils.

2. Wet suppression equipment shall consist of sprinkler pipelines, tanks, tank trucks, or other devices capable of providing regulated flow, uniform spray, and positive shut-off.

3. Water may be sprinkler applied with equipment including a tank with gauge-equipped pressure pump and a nozzle-equipped spray bar.

4. Water shall be dispersed through the nozzle under a minimum pressure of 20 pounds per square inch, gauge pressure.

5. The Contractor shall provide the necessary means to retain on-site all water runoff generated by dust control and dispose of such water in accordance with the requirements of the appropriate regulatory agencies. The Contractor shall be responsible for providing water, a means of disposal, necessary permits, and all appurtenances required to control dust. Coordinate with the requirements of Section 01 57 19 - Temporary Environmental Controls.

B. Calcium chloride shall be used to control dust instead of wet suppression when freezing conditions exist. Calcium chloride shall be uniformly applied by a mechanical spreader at 1 ½ pounds per square yard, unless otherwise required by the Engineer. Ensure vegetation or soil to be used for vegetation is not treated.

C. The use of petroleum products for dust suppression is prohibited in this Contract.

D. Provide wind screens and wind barriers in locations where they would be effective in minimizing wind erosion and spread of dust. Locations shall be submitted as part of the Contractor’s Dust Control Plan. The Contractor shall keep wind screens and barriers in good repair for the life of the Contract.

E. The Contractor is responsible for daily clean-up of paved areas affected by the work of this Contract. A wet spray power vacuum street sweeper shall be used on paved areas.

Dry power sweeping is prohibited.

3.02 PUBLIC ROADWAY DUST CONTROL:

A. Vehicles leaving the demolition site shall have no mud and dirt on the vehicle body or wheels. Any foreign matter on the vehicle body or wheels shall be physically removed prior to vehicle’s entering of a public roadway. Contractor shall not permit any truck to leave the site with exterior mud or dirt that has the potential to be deposited on public roadways.

B. Haul truck cargo areas shall be securely and completely covered during material transport on public roadways.

01 14 19.25 - 4

C. Vehicle mud and dirt carryout, material spills, and soil wash-out onto public roadways and walkways and other paved areas shall be cleaned up immediately.

D. The Contractor is responsible for daily clean-up of public roadways and walkways affected by work of this Contract. A wet spray power vacuum street sweeper shall be used on paved roadway. Dry power sweeping is prohibited.

3.03 CONTROL OF EARTHWORK DUST:

A. During batch drop operations (i.e., earthwork with front-end loader, clamshell bucket, or backhoe) the free drop height of excavated or aggregate material shall be reduced as much as practical to minimize the generation of dust.

B. To prevent spills during transport, freeboard space shall be maintained between the material load and the top of the truck cargo bed rail.

3.04 CONTROL OF STOCKPILE DUST:

A. The Contractor shall use the following methods to control dust and wind erosion of active and inactive stockpiles:

1. Wet suppression without wetting agent during active stockpile load-in, load-out, and maintenance activities.

2. Soil stabilizers applied to the surface of inactive stockpiles.

3. Polyethylene tarps on stockpiles shall be placed both below and on top of stockpiles, and secured with sandbags or an equivalent method to prevent the cover from being dislodged by the wind. The Contractor shall repair or replace covers whenever damaged or dislodged, at no additional cost to the Owner.

4. The tarps shall be bermed 12-inches high at all edges to prevent any infiltration of storm water or exfiltration of leachate.

B. The methods to be used shall be submitted to the Engineer as part of the Dust Control Plan.

3.05 DEMOLITION DUST CONTROL MEASURES:

A. The Contractor shall use water sprinkling, temporary enclosures, and other suitable methods to limit dust and dirt rising and scattering in the air to the lowest practical level. Sufficient water shall be supplied for the building, demolition-related debris, and site compacting to meet Federal, State, and local air-quality regulations and to minimize dust during demolition.

B. Closed chutes shall be used for the handling of debris. Dropping or throwing of debris is prohibited.

01 14 19.25 - 5

C. Debris shall not be stockpiled. Debris shall be removed promptly from the site.

D. During transport of debris, the truck cargo area shall be securely covered.

01 14 19.25 - 6

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DORCHESTER COUNTY WATER AND SEWER Schedule of Values

01 29 73 - 1

SECTION 01 29 73

SCHEDULE OF VALUES

1.01 RELATED DOCUMENTS:

A. Drawings and General Provisions of Contract, including General Conditions and other

Division 1 Specification Sections, apply to this Section, with special attention to the following:

1. Section 01 32 19 - Submittals Schedule

1.02 DESCRIPTION OF WORK:

A. SUBMIT WITH THE BID: A Schedule of Values allocated to the various portions for the Work. At a minimum, the Contractor is required to submit Attachment A

– Schedule of Values and Attachment B – Items not Listed. Sum of itemized

Schedule of Values shall equal total price of Base Bid submitted.

B. Upon request by the Engineer, support the values with data substantiating their correctness.

C. The Schedule of Values, unless objected to by the Engineer, shall be used only as the basis for recommendation of award and the Contractor’s Applications for Payment.

1.03 FORM AND CONTENT OF SCHEDULE OF VALUES:

A. The form for the Schedule of Values shall be the form in Attachment A of this section.

The form shall be completed in detail including quantities and unit costs as recommended in Attachment B of this section.

B. Identify Schedule with:

1. Complete title of Project and location.

2. Name of Engineer and Engineer’s Project Number.

3. Name and address of Contractor.

4. Date of Submission.

C. Organize the Content of Schedule into columns with headings as follows:

1. Item No. (Column No. 1)

2. Description of Item (Column No. 2)

01 29 73 - 2

3. Quantity (Column No. 3)

4. Unit of Measure (Column No. 4)

5. Cost per Unit (Column No. 5)

6. Total Cost of Item (Column No. 6)

D. Information in Schedule of Values shall be incorporated into proper and identical lines and columns of all Applications for Payment, and shall serve as a basis for computing

Progress Payments during construction.

E. All line items shall be separated into all sub-values of major products and all information for all sub-values shall be as outlined above.

F. Each item shall include a directly proportional amount of the Contractor’s overhead and profit.

G. The sum of all values listed in the Schedule shall equal the total Contract Sum.

H. See Attachment A for the minimum items to be included in the schedule of values. All other items not included as line items must be priced as a lump sum on the last row of

Attachment A AND broken out in Attachment B.

1.04 SUBMITTALS

A. Submit one electronic copy, as per Section 01 32 19 - Submittals Schedule for review by the Engineer and Owner immediately after the Notice to Proceed. The Engineer and

Owner shall review and approve, or require modifications of the submittal. If modifications are required, make corrections and resubmit.

PART 3 EXECUTION (NOT USED)

01 29 73 - 3

ATTACHMENT A

SCHEDULE OF VALUES FORM

Contract No.: Bid Number:

Engineer Project No.: ENG24-1373 Date:

Item

No.

Description Qty Unit Unit Cost Total

1 Mobilization, Bond & Insurance 1 LS $ $

2 Sediment & Erosion Control 1 LS

3 Grassing & Stabilization 1 LS

4 Clearing & Grubbing 1 LS

5 Tree Removal 1 LS

6 Connect to Existing FM @ PS10 ¹ 1 LS

7 10” C900 DR18 PVC Pipe, RJ (Open-Cut) 1898 LF

8 10” DI Fittings

8a 10” DI 45-deg Bend (MJ w/ Megalug) 6 EA

8b 10” DI 11.25-deg Bend (MJ w/ Megalug) 12 EA

9 Connect to Existing FM @ Rumphs Hill Creek ¹ 1 LS

10 Connect to Existing Manifolding 6" FM ¹ 2 EA

11 10” Plug Valve, 100% Port (MJ w/ Megalug) 5 EA

12 6” Plug Valve, 100% Port (MJ w/ Megalug) 2 EA

13 HDDs

13a HDD 1 – DR18 FPVC 939 LF

13b HDD 2 – DR18 FPVC 1272 LF

13c HDD 3 – DR18 FPVC 1059 LF

13d HDD 4 – DR18 FPVC w/ Casing 1482 LF

13e HDD 5 – DR18 FPVC 905 LF

13f HDD 6 – DR18 FPVC 2015 LF

14 Traffic Control 1 LS

15 Air Release Valve w/ Pedestal 5 EA

16 Construction Staking / Surveying 1 LS

17 Force Main Markers 1 LS

18 Dummy Valve Boxes 1 LS

19 Trench Select Backfill / Stone 469 LF

20 Pavement Repair 90 SY

21 Force Main Testing 1 LS

22 Dewater & Fill Existing (remaining) 8” FM 10,000 LF

23 Final Record Drawings 1 LS

24 All other items not included in Lines 1-23** 1 LS

Total (Must Equal Bid Amount) $

01 29 73 - 4

¹ Connection line items include necessary bypass, labor, fittings (excluding valves), and necessary appurtenances to complete the connection as shown on contract drawings.

**Items included in this line item must be broken out and listed on Attachment B – Items Not Listed. Total shown in Attachment

B must equal the total shown in line item #24 of Attachment A.

ATTACHMENT B

ITEMS NOT LISTED

Contract No.: Bid Number:

Engineer Project No.: ENG24-1373 Date:

Item

No.

Description Qty Unit Unit Cost Total

A $ $

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

Total (Must Equal Total Shown in Line Item #24 of Schedule of Values) $

DORCHESTER COUNTY WATER AND SEWER Submittals Schedule

01 32 19 - 1

SECTION 01 32 19

SUBMITTALS SCHEDULE

1.01 DESCRIPTION

A. Submittals covered by these requirements include manufacturers' information, shop drawings, test procedures, test results, samples, requests for substitutions, and miscellaneous work related submittals. Submittals shall also include, but not be limited to, all mechanical, electrical and electronic equipment and systems, materials, reinforcing steel, fabricated items, and piping and conduit details. The Contractor shall furnish all drawings, specifications, descriptive data, certificates, samples, tests, methods, schedules, and manufacturer's installation and other instructions as specifically required in the contract documents to demonstrate fully that the materials and equipment to be furnished and the methods of work comply with the provisions and intent of the contract documents.

1.02 CONTRACTOR'S RESPONSIBILITIES

A. The Contractor shall be responsible for the accuracy and completeness of the information contained in each submittal and shall assure that the material, equipment or method of work shall be as described in the submittal. The Contractor shall verify that all features of all products conform to the specified requirements. Submittal documents shall be clearly edited to indicate only those items, models, or series of equipment, which are being submitted for review. All extraneous materials shall be crossed out or otherwise eliminated. The Contractor shall ensure that there is no conflict with other submittals and notify the Engineer in each case where his submittal may affect the work of another contractor or the Owner. The Contractor shall coordinate submittals among his subcontractors and suppliers including those submittals complying with unit responsibility requirements and applicable technical sections.

B. The Contractor shall coordinate submittals with the work so that work will not be delayed. He shall coordinate and schedule different categories of submittals, so that one will not be delayed for lack of coordination with another. No extension of time will be allowed because of failure to properly schedule submittals. The Contractor shall not proceed with work related to a submittal until the submittal process is complete. This requires that submittals for review and comment shall be returned to the Contractor stamped "No Exceptions Taken" or "Exceptions Noted." The Contractor shall certify on each submittal document that he has reviewed the submittal, verified field conditions, and complied with the contract documents. The Contractor may authorize in writing a material or equipment supplier to deal directly with the Engineer or with the Owner with regard to a submittal. These dealings shall be limited to contract interpretations to clarify and expedite the work.

01 32 19 - 2

1.03 TRANSMITTAL PROCEDURE

A. GENERAL:

1. Unless otherwise specified, submittals regarding material and equipment shall be accompanied by a Transmittal Form. Submittals for operation and maintenance manuals, information and data shall be accompanied by a Transmittal Form. A separate form shall be used for each specific item, class of material, equipment, and items specified in separate, discrete sections, for which the submittal is required.

Submittal documents common to more than one piece of equipment…