ESBD_File_336440_1. Attachment K _14845 Phase 1 - LS 6 Specifications.pdf

GBA Project No.: 14845.00

CITY OF LEANDER

WASTEWATER COLLECTION SYSTEM

LIFT STATION IMPROVEMENTS

PHASE I – LIFT STATION #6

Technical Specifications

August 2023

8/25/2023

WASTEWATER COLLECTION SYSTEM LIFT STATION IMPROVEMENTS, PHASE 1 LIFT STATION #6

TECHNICAL SPECIFICATIONS

CITY OF LEANDER, TEXAS

TOC-i

TABLE OF CONTENTS

TECHNICAL SPECIFICATIONS

DIVISION 1 – GENERAL REQUIREMENTS

1A General Provisions 1B Special Provisions

DIVISION 2 - SITE WORK

2A Clearing And Grubbing 2B Earthwork 2C PVC Wastewater System Pipe 2F Detectable Warning Tape 2J Restoration and Revegetation 2K Trench Safety Program 2P Temporary Bypass Pumping &Pump and Haul Plan

DIVISION 3 - CONCRETE

3A Formwork For Cast-In-Place Concrete 3B Concrete Reinforcing 3C Cast-In-Place Concrete 3D Concrete Manholes and Junction Boxes 3E Construction Joints and Water Stops 3F Precast Concrete

DIVISION 4 THROUGH 6 - NOT USED

DIVISION 7 THROUGH 10 - NOT USED

DIVISION 11 - EQUIPMENT

11A - Pumping Equipment 11B – Duplex Above Ground Valve Access Station 11C – Jib Crane, Hoist & Trolley 11D - Radio Tower & Antenna

11E – Activated Carbon Canister

DIVISION 12 THROUGH 15 - NOT USED

DIVISION 16 - ELECTRICAL

16A - Materials And Methods 16B – Control and Instrumentation 16E – Lift Station Control Panel 16G – Diesel Generator 16H – Automatic Transfer Switch

DRAWINGS

1A-1

DIVISION 1 - GENERAL REQUIREMENTS

SECTION A

GENERAL PROVISIONS

01. GENERAL PROVISIONS: The General Provisions and the Supplementary Provisions of these documents form a part of these technical specifications.

02. NAME & LOCATION OF PROJECT: The PROJECT is the Wastewater Collection System Lift Station

Improvements, Phase 1 Lift Station 6, the OWNER is the City of Leander, Texas, and the ENGINEER is Jay Engineering, A Division of GBA. The PROJECT is located within the City of Cedar Park.

03. DESCRIPTION OF WORK: This project consists of the installation of wastewater collection lines, wastewater lift station and force main, repair of pavement as needed, and other appurtenant work.

These technical specifications apply to the work as shown, and all work is shown on the drawings as follows:

SHEET 1 - COVER SHEET

SHEET 2 - CEDAR PARK CONSTRUCTION NOTES

SHEET 3 - LEANDER CONSTRUCTION NOTES

SHHET 4 – 8 - HERITAGE PARK SECTION TWO FINAL PLAT

SHEET 9 - OVERALL LAYOUT

SHEET 10 - EXISTING CONDITIONS & DEMOLITION PLAN

SHEET 11 - EROSION & SEDIMENTATION CONTROL PLAN

SHEET 12 - DRAINAGE AREA MAP

SHEET 13 - SITE PLAN

SHEET 14 - GRADING PLAN

SHEET 15 - POND PLAN

SHEET 16 - POND SECTIONS

SHEET 17 - WASTEWATER PLAN AND PROFILE

SHEET 18 - LIFT STATION SECTIONS

SHEET 19 - SIDEWALK CLOSURE PLAN

SHEET 20 - 22 - CONSTRUCTION DETAILS

SHEET 23 - WASTEWATER BYPASS PLAN

SHEET 24 - TRAFFIC CONTROL PLAN

SHEET 25 - ELECTRICAL NOTES AND LEGEND

SHEET 26 - ELECTRICAL SITE PLAN

SHEET 27 - ELECTRICAL DIAGRAMS

SHEET 28 - PUMP SCHEMATICS

SHEETS 29 - 30 - ELECTRICAL DETAILS

SHEETS 31 – 32 - STRUCTURAL DETAILS

04. CONSTRUCTION STAKING: Contractor shall be responsible for construction staking and control, in accordance with line and grade provided on the contract drawings or subsequent modifications thereto. Said construction staking and control shall be performed by, and submitted under the seal of, a State of Texas Registered Professional Land Surveyor responsible for the surveying work. Field staking shall not commence until Engineer approval of such work is issued.

05. WORK COMPLETION AND LIQUIDATED DAMAGES: The time specified in the Contractor's Proposal for completion of all work is deemed sufficient for performing the work, weather permitting.

1A-5

Justifiable and documented weather delays will be cause for extension(s) of time to complete the project, but the Contractor must diligently and continuously pursue the work when weather conditions allow. Liquidated damages will be withheld from the Contractor's total payments at the rate of One Thousand Dollars ($1,000.00) per calendar day beyond the completion date (to be specified in the Notice to Proceed) for failure to substantially complete the work. Substantial completion shall mean completion to the point that the Owner can beneficially utilize the project. Failure to complete minor work items, for which no damages will be incurred by the Owner, will not be cause for withholding of liquidated damage amounts.

06. MEASUREMENT AND BASIS OF PAYMENT: For items bid on a lump sum or per each basis, no extra or customary measurements of any kind will be made, but the actual number of items installed or completed will be used as basis for payment. For items bid on a unit price basis, payment will be made based on the actual number of units installed. In case of conflict between measurements and payment defined in technical specifications and those defined in the bid schedule, the definitions and enumerations in the bid schedule will take precedence.

Measurement and payment for each work item shall be in accordance with the following:

a) ITEM 1 – MOBILIZATION: Mobilization shall be paid for in accordance with the lump sum price set forth in the Contractor’s bid for mobilization. Payment of the bid amount, less retainage withheld in accordance with the percentages specified in the Agreement, shall be made following the execution of the Contract Documents by all parties, submittal of a complete project schedule, submittal of a complete submittal schedule, submittal of shop drawings as determined by the Engineer, attendance at the preconstruction conference, completion of the preconstruction photographic record and preconstruction video tape recordings, installation of the office space dedicated to the Resident Project Representative, locating and protecting all existing utilities, completion of the protection of trees to be saved, application for and obtaining required permits (if not already obtained by Engineer or Owner), and completed implementation and maintenance required by permits.

b) ITEM 2 – CLEARING/GRUBBING: This work shall consist of removal, grubbing, and disposing of all vegetation such as trees, bushes, shrubs, plants, vines, brush, weeds, and sod necessary for the construction of the project, as well as, removing and properly disposing of all trash. Payment for Clearing/Grubbing shall include all material, labor, and equipment costs incurred by clearing and grubbing operations per the specifications and will be made at the lump sum price set forth in the Contractor’s bid.

c) ITEM 3 – PROTECTION AND RESTORATION OF SITE: All established yards, lawns and/or landscaping shall be replaced with identical to those removed, destroyed, or disturbed during construction. Payment for protection and restoration shall include ground cover, silt fence, all necessary vegetation or seeds to be planted, labor, and equipment costs needed per the specifications, demolition of the existing lift station, and will be made at the lump sum price set forth in the Contractor’s bid.

d) ITEM 4 – STABILIZED CONSTRUCTION ENTRANCE: Payment for stabilized construction entrances shall be made in accordance with the unit price per each set forth in the Contractor’s bid. This price shall include materials, labor, and equipment necessary to complete the construction of the stabilized entrance in accordance with the Drawings.

e) ITEM 5 – ROCK BERM: Payment for the rock berm shall be made in accordance with the unit price per lineal foot set forth in the Contractor’s bid. The unit price shall include the costs of all equipment, labor, materials, and any necessary excavation that may need to be undergone to complete the work.

f) ITEM 6 – EXCAVATION AND GRADING: Payment for excavation and grading shall be made in accordance with the unit price per cubic yard set forth in the Contractor’s bid. The unit price shall include full compensation for disposal as measured in its original location, labor, and equipment required therewith.

g) ITEM 7 – BYPASS PUMPING: Payment for bypass pumping shall be made in accordance with the lump sum price set forth in the Contractor’s bid. This price shall include the cost of all labor, equipment, and incidentals required to complete the pumping.

h) ITEM 8 – WET WELL, PUMPS, ANCILIARRY ITEMS AND APPURTENANCES: Payment for the wet well and pumps including piping, bracing, wiring, level sensors, and installation shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include the cost of labor, materials, and incidentals required to construct the wet well.

i) ITEM 9 – USEMCO PUMPMATE: Payment for the USEMCO Pumpmate shall be made in accordance with the unit price per each set forth in the Contractor’s bid. The unit price shall include full compensation for all labor, equipment, and materials required for installation of the USEMCO Pumpmate system.

j) ITEM 10 – WETWELL AND CONVERTED MANHOLE COATING: Payment for wet well and converted manhole coating shall be in accordance with the lump sum price set forth in the Contractor’s bid for rehabilitation as shown in the Drawings and in accordance with the specifications, and shall be full compensation for all labor, materials, equipment and incidentals necessary to complete the work. This price shall include inspections; reports; testing; repair and resurfacing as necessary; structure preparation, chemical grouting, and cementitious coating as necessary; dewatering, traffic control; labor, materials and equipment required in furnishing and installing the protective lining as identified on the drawings.

k) ITEM 11 – CONVERSION ON EXISTING 8” WET WELL TO MANHOLE: Payment for 8’ diameter wet well conversion shall be made in accordance with the lump sum price set forth in the Contractor’s bid. This price shall include all materials, labor, and equipment necessary to complete the conversion of the wet well in accordance with the drawings.

l) ITEM 12 – 4’ DIA. WASTEWATER MANHOLE: Payment for the 4’ -0” dia. WW Manhole shall be in accordance with the unit price per each set forth in the Contractor’s bid. The unit price shall cover the construction and coating of one 4’ dia. standard manhole. This price shall include the manhole foundation, manhole invert construction; walls, manhole top slab, cone section, grade adjustment, exterior waterproofing as required, manhole frame and cover, epoxy lining as required, necessary ladder steps; connections to existing lines as indicated on the Drawings;

excavation of all materials encountered; dewatering as required; removal of existing manholes and structures as shown on the drawings; backfilling and compaction; and other work items incidental thereto required for construction of the manhole.

m) ITEM 13 – 4” DIP FORCE MAIN: Payment for 4” D.I.P force main will be made at the bid price per lineal foot set forth in the Contractor’s bid. Payment shall include the costs of all labor, materials, incidentals, and excavation as needed during the placing of the pipe.

n) ITEM 14 – 8” WASTEWATER SDR-26 PVC: Payment for 8” SDR-26 PVC shall be made in accordance with the unit price per lineal foot set forth in the Contractor’s bid. The unit price shall include the construction of 8” SDR-26 PVC, grade adjustment, exterior waterproofing as necessary, connections to existing lines as indicated by the drawings, excavation of all materials encountered, backfilling and compaction, and other work items incidental thereto required for construction of the WW line.

o) ITEM 15 – CONTROL PANEL: Payment to replace the control panel shall be made in accordance with the unit price per each set forth in the Contractor’s bid. The unit price shall include full compensation for all labor, equipment, and materials required for replacement of the control panel.

p) ITEM 16 – SCADA: Payment for SCADA shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The unit price shall include full compensation for all labor, equipment, and materials required for installation of the SCADA system, including the tower and foundation.

q) ITEM 17 – GENSET: Payment to replace the genset and the genset concrete slab shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum amount shall include the cost of all labor, equipment, materials, and incidentals required in installing the genset and the genset concrete slab.

r) ITEM 18 – ELECTRICAL EQUIPMENT SHELTER: Payment to replace the electrical shelter shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include full compensation for all labor, equipment, and materials required for replacement of the electrical shelter.

s) ITEM 19 – ACTIVATED CARBON DRUMS ODOR CONTROL: Payment for the activated carbon drums odor control system including 4” PVC and vent shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include the cost of labor, materials, and incidentals required to install the odor control system.

t) ITEM 20 – JIB CRANE, HOIST AND TROLLEY: Payment to replace the jib crane, hoist and trolley system including slab and installation shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include the cost of labor, materials, and incidentals required to replace the jib crane, hoist, and trolley system.

u) ITEM 21 – RETAINING WALL (DETENTION BASIN): Payment for the retaining wall shall be based on the installed square face feet (SFF) of wall at the bid price per square foot set forth in the Contractor’s bid. Payment shall include the costs of all labor, materials, incidentals, and excavation as needed during the construction of the retaining wall.

v) ITEM 22 – POND CONCRETE STRUCTURE WITH CONCRETE AND ROCK RIP RAP: Payment for the pond concrete structure with concrete and rock rip rap shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include full compensation for all labor, equipment and materials required therewith.

w) ITEM 23 – FENCECRETE W/ STEEL GATE: Payment for fencecrete shall be made in accordance with the unit price per linear foot. The unit price set forth in the Contractor’s bid shall include full compensation for all labor, equipment and incidentals required in placing the fencecrete as well as payment for any excavation.

x) ITEM 24 – STAIRS: Payment to replace the stairs shall be made in accordance with the lump sum price set forth in the Contractor’s bid. The lump sum price shall include full compensation for all labor, equipment, and materials required for replacement of the stairs.

y) ITEM 25 – AREA LIGHT: Payment for the area light shall be made in accordance with the unit price set forth in the Contractor’s bid. The unit price shall include full compensation for all labor, coating, and equipment required therewith.

z) ITEM 26 – 7” CONCRETE DRIVE: Payment for concrete drive shall be made in accordance with the unit price per square foot set forth in the Contractor’s bid. The unit price shall include the cost of all labor, materials, and equipment required to replace the concrete.

aa) ITEM 27 – WHEEL STOP: Payment for the wheel stops shall be made in accordance with the unit price per each set forth in the Contractor’s bid. The unit price shall include the cost of all labor, equipment, and incidentals required to install the wheel stops.

07. BYPASS PUMPING: The CONTRACTOR shall provide for the flow of sewage around the section of sewer lines under replacement. Plugging the line at an existing upstream manhole and pumping or directing the flow to a downstream manhole or adjacent sanitary sewer system shall make the bypass. The pump(s) and bypass lines shall be of adequate capacity and size to handle the flow.

Contractor is to submit a bypass pumping plan for review. The plan must include redundant pump systems.

1B-1

DIVISION 1 - GENERAL REQUIREMENTS

SECTION B

SPECIAL PROVISIONS

01. SEQUENCE OF WORK: The sequence of work on this project shall be in the order of Contractor's preference, as approved by the CITY. Work may proceed at CONTRACTOR’S discretion, in a manner to prevent interruption of CITY operations and adequate utility operations and traffic flow.

02. PROTECTION OF WORK BY OTHERS: CONTRACTOR to preserve and protect all coincident work by others, including CITY utilities and contractors. CONTRACTOR will be held responsible for any damage incurred by these facilities due to his activities.

03. WATER FOR CONSTRUCTION: Water for construction purposes will be furnished by the CITY at an approved, metered hydrant and at the CONTRACTOR’S expense. CONTRACTOR shall be responsible for security of his access point and prudent use of such water.

04. BLASTING: Blasting or the use of explosives will not be allowed on this project. Excavation to be completed by mechanical means and unclassified.

05. UTILITY APPURTENANCE ADJUSTMENT: All utility adjustments required for CONTRACTOR’S work will be performed by the utility contractor.

06. EROSION AND SEDIMENTATION CONTROLS: Erosion and sedimentation controls have been shown on the drawings. Any activities on behalf of the Contractor that would make the project subject to additional controls will require the Contractor to comply without additional compensation by the Owner.

07. CONSTRUCTION REVIEW: The CITY shall provide a project representative to review the quality of materials and workmanship.

08. LIMITS OF WORK AND PAYMENT: It shall be the obligation of the CONTRACTOR to complete all work included in this contract, so authorized by the CITY, as shown on the drawings or described in the contract documents and technical specifications. All items of construction not specifically enumerated in the bid schedule shall be incidental to the unit price bids. Any question arising as to the limits of work shall be subject to the interpretation of the ENGINEER.

09. TOTAL OF PAYMENTS: The CITY has budgeted funds in an amount deemed sufficient for the work awarded, and as shown in these documents. In the event the product of unit prices and quantities results in work with an anticipated value in excess of the total amount awarded, the CONTRACTOR shall give notice of such overage prior to performing the work. Any work performed that exceeds the scheduled quantities, without prior authorization, will be performed at the CONTRACTOR’S risk.

010. FINAL PAYMENT: Final payment for work hereunder will be after ENGINEER'S certificate of substantial completion and compliance, which will follow final inspection and approval by the CITY.

2A-1

DIVISION 2 - SITEWORK

SECTION A

CLEARING AND GRUBBING

01. GENERAL: Furnish all labor and equipment required to complete all clearing and grubbing in and around proposed work areas.

02. CONSTRUCTION METHODS:

a) Clearing: The contractor shall remove all shrubs and debris as shown on the drawings or for distance required for construction. Contractor shall not cut any trees, except as approved by the Engineer.

b) Grubbing: The contractor shall be responsible for the removal of all stumps and roots for a depth of 24" below existing grade in areas to be cleared for work areas. Holes left by grubbing shall be filled with clean soil and compacted.

c) Vegetation Control: In areas where vegetation control is needed, weed killer shall be applied by the Contractor ten (10) days prior to work start. The Contractor will be responsible for subsequent burn-off and removal of dead vegetation prior to work.

d) Disposal of Cleared Materials: Contractor shall remove all cleared vegetation, debris and bladed earthen materials from the construction site and dispose of it at an approved site.

2B-1

DIVISION 2 - SITEWORK

SECTION B

EARTHWORK

01. GENERAL:

a) Scope: This section includes work required for proper completion of excavation, backfill, trenching, shoring, bracing, dewatering of excavations, grading, compacting, disposal of surplus materials, together with other miscellaneous sitework and earthwork operations necessary to complete project as shown on drawings and specified herein.

b) Protection of Existing Facilities: Prior to beginning any earthwork operations, protect existing facilities and/or permanent objects, including existing utilities, poles, guys, trees and roadways.

Contractor shall be responsible for locating all existing underground utilities prior to commencement of excavation operations. Costs resulting from damage to utilities or permanent facilities due to negligence or lack of adequate protection shall be borne by Contractor.

02. MATERIALS:

a) Pipe Bedding Stone: Bedding stone material, as designated on the drawings, shall be clean, granular material composed mainly of mineral matter free of mud, silt, clay lumps, vegetation or debris conforming to ASTM C33 for stone quality. Size gradation shall conform to ASTM C-33 No.

57 or No. 67. Limestone crusher screenings with fines will not be acceptable.

b) Fill or Backfill: Where use of fill or backfill is designated on the drawings, excess excavated materials from locations on the project site may be used, or the Contractor may obtain approved fill material from a source outside the site. Material shall be free from vegetation, debris, large rocks and boulders exceeding 2" in their greatest dimension. Fill material shall be a stable soil approved by the Owner’s representative prior to use on project.

c) Select Fill: Select Fill for use where noted shall be sandy soil or other granular material having plasticity index of not greater than six (6) with not more than 30 percent (30%) passing a No. 200 sieve.

03. CONSTRUCTION METHODS:

a) Excavation: Excavation shall be incidental to facilities construction and shall include removal of all types of materials encountered. Make excavations to lines and grades indicated on drawings, with completed excavations within tolerances hereinafter specified.

b) Blasting: No blasting will be allowed on this project.

c) Shoring, Bracing, and Dewatering Excavations: Provide all shoring, bracing and dewatering of excavations required to properly and safely complete the work as shown on the drawings.

Construct shoring and bracing as required to prevent excavation from extending beyond specified or indicated limits and to protect workmen. Keep all excavations dewatered by drainage, pumps, or well points as necessary while construction therein is in progress. Remove shoring, bracing and sheeting as excavations are backfilled, in a manner to prevent injurious caving. See Trench Safety Program of this specification.

d) Pipe Trenches: Make and maintain sides of trench as nearly vertical as practical and provide shoring where necessary to maintain sides in a vertical position and to protect workmen.

2B-2

Complete and shape trenches to provide free working space and to permit thorough tamping of embedment around pipe. Accurately grade bottom of trenches to provide a uniform bearing on firm soil along entire length of each pipe section. Remove rubbish, rock, or debris encountered at grade to a depth of at least six (6) inches below bottom of pipe, place, shape and compact pipe bedding. Working space from outside of pipe to side of trench shall not be less than 6-inches or more than 24-inches. Provide bell holes where required for making proper connections at joints.

e) Backfill at Structures: Place backfill at structures, as far as practicable, as work progresses.

Remove forms, shoring, bracing etc. before backfill is started and do not place backfill against concrete until cured. Prevent wedging action of backfill against pipe or structure, and step or serrate slopes bounding excavation to prevent such wedge action.

f) Special Bedding: All piping shall be bedded as shown on the drawings and as described herein.

i) Stone: Provide pipe bedding stone as specified in section .02 a) above. Provide clean stone, free of clay, loam, rubbish, vegetative matter or other deleterious substance, meeting approval of Owner’s representative.

ii) Compacting: Place bedding material in uniform layers, dried or moistened as required to obtain approximate optimum moisture content, and compact to at least 95% of maximum density as determined by ASTM D-698 or TEX-113 Method. Maximum thickness of uniform layers of loose material shall not exceed eight (8) inches. Compaction shall be such that a uniform density will be obtained over entire area and depth of bedding material.

iii) Control: Methods used in obtaining the proper moisture content and required degree of compaction shall be Contractor’s responsibility.

g) Backfill of Pipe Trenches: Backfilling of pipe trenches shall not be started until pipe joints have been inspected and approved by Owner. Remove shoring and bracing, if used, before backfilling of trench. Backfill shall be free of large lumps, rocks, or debris which might prevent compaction, cause damage to joints, pipe, etc., or result in improper bedding of pipe. Avoid dropping of loose material in any manner that may deflect or damage pipe or fittings.

h) Compaction of Backfill:

i) General: Place fill and backfill, except as otherwise specified, in uniform layers, dried or moistened as required to obtain approximate optimum moisture content, and compact to a density of at least 95% of maximum density at optimum moisture as determined by ASTM D- 698 or TEX-113 methods. Methods used to secure the optimum moisture content and degree of compaction required, will be Contractor’s responsibility. Compacting equipment and method of compaction shall be such that a uniform density will be obtained over entire area and depth of material being compacted. Hand tamping shall be done with mechanical hand tampers unless otherwise approved by Owner.

ii) Backfill Over Pipelines: As shown on the plans, place bedding conforming to requirements of select fill in pipe trenches and bed pipe uniformly therein. Deposit bedding material carefully and uniformly along sides and to a depth of 12 inches over top of pipes in six (6) inch layers and carefully tamp. Fill remainder of trench in uniform layers and water tamp by flooding. In no case shall fill be placed in layers too thick to be soaked thoroughly. Continue water tamping until all cavities are eliminated and backfill is thoroughly consolidated. Backfill last one (1) foot of backfill up to existing or proposed pavement or original ground in layers and compact by use of power equipment, tractors, trucks, etc. to not less than 100% of density of original undisturbed soil.

2B-3

iii) Mechanical Hand Tampers: Where fill or backfill is to be compacted with mechanical hand tampers, thickness of each uniform layer to be compacted shall not exceed six (6) inches.

Methods of compaction shall be such that a uniform density is obtained throughout entire area and depth of each layer.

iv) Protection of Moisture Content: Protect excavations and fills from excessive wetting and drying. Place concrete foundations and select materials immediately after completion of excavation in each area or section.

v) Finish Grading: Before leaving site, Contractor shall hand rake the work area to a uniform and smooth surface.

vi) Pavement Repair: Trenches cut in areas of existing pavement shall be repaired to original condition. These areas shall be brought to the pavement subgrade level with flowable fill or controlled low-strength material. Then the area shall be brought to the paving surface grade with compacted flexible base, and subsequently patched with Type D HMAC. Replacement of compacted flexible base and HMAC in areas not scheduled for payment is considered incidental to the work, and no separate pay shall be made for pavement repairs. Only the scheduled repairs and quantities will be measured and paid at the price scheduled on the Contractor’s Proposal.

i) Disposal of Excess and Unsuitable Materials: Excess material with particle size not exceeding six inches (6”) may be stored at the designated spoil site to the northeast of the project. The pile must meet the spoil site notes a) through e) and g) outlined on sheet 5 of the construction plans.

All excess unsuitable materials removed during construction operations shall become property of Contractor. Remove material designated as "excess" or "unsuitable" by Owner from site and dispose of same.

2C-1

DIVISION 2 - SITEWORK

SECTION C

PVC WASTEWATER SYSTEM PIPE

01. GENERAL: Furnish all equipment, materials and labor, and perform all operations necessary for the construction of gravity sanitary sewer or forced main wastewater lines.

02. MATERIALS:

a. Pipe: PVC pipe for gravity system and force main system shall be of ring gasket type joint, conforming to ASTM Specification D-3034 or D-2241. PVC pipe shall be Class SDR-26, ASTM 3034 for gravity systems and AWWA C-900 (green and marked for sewer) for forced mains.

b. Joints and Fittings: PVC pipe and fittings for gravity system and force mains shall have ring gasketed joints.

03. PROCEDURE:

a. Excavation: Perform pipe trench excavation in accordance with Section 2B of this specification, by open cut method.

b. Preparation of Trench Bottom: Grade trench bottom to afford uniform bearing of pipe in accordance to grade indicated of the drawings. Provide excavation for pipe bells in accordance with manufacturer's recommendations.

c. Pipe laying: Furnish and install necessary grade stakes, batter boards and alignment references. Begin laying pipe at lower end, unless otherwise approved, with bell end pointing upstream. Pipe ends shall be cleaned and gasket carefully installed in accordance with manufacturer's instructions. Pipe shall be laid and joints made to form a smooth continuous conduit.

d. Horizontal Alignment: Pipeline alignment to conform with that shown on the drawings. No joint deflections will be allowed.

e. Pipe Handling: Precautions in pipe handling shall be exercised as described in this specification and in accordance with manufacturer’s instructions.

f. Manholes: The invert shall be built of concrete or half-section of pipe and the invert shall be true and troweled to a smooth hard finish. Pipe connections to manholes shall be made water tight using approved manhole couplings. Manhole couplings shall be grouted into place, using a stiff mix non-shrink grout, via knocked out holes in concrete pipe walls. Steps shall not be provided. Drop manholes shall be constructed where shown on the plans.

g. Connections to Existing Lines: Connect to existing wastewater lines or manholes as shown on the drawing, using materials and methods for new work as specified herein.

h. Backfilling: After approval of line work, backfill as specified in Section 2B of this specification.

2C-2

i. Leakage Testing: Test all mains in strict accordance with the leakage test given below.

Maximum allowable leakage shall be 50 gallons per 24 hours per inch of inside diameter per mile of pipeline. After completing backfill of each section of wastewater line Contractor shall, at his expense, conduct a Line Acceptance Test using low-pressure air. Perform test using equipment and procedures specified below, under supervision of Owner.

1. Equipment - Minimum requirements.

a. Pneumatic plugs shall have a sealing length to or greater than diameter of pipe to be inspected.

b. Pneumatic plugs shall resist internal test pressure without requiring external bracing or blocking.

c. Air shall pass through a single control panel.

d. Three individual hoses shall be used for the following connections.

(1) From control panel to pneumatic plugs for inflation.

(2) From control panel to sealed line for introducing low-pressure air.

(3) From sealed line to control panel for continually monitoring air pressure rise in sealed line.

2. Procedures -

a. Pneumatic plug shall be seal-tested before being used in actual test installation. Lay on length of pipe on ground and seal at both ends with pneumatic plugs to be checked.

Inflate air plugs to 25 psig. Pressurize sealed pipe to 5 psig.

Plugs shall hold against this pressure without bracing and without movement of plugs out of pipe.

b. After a manhole-to-manhole section of pipe has been backfilled and cleaned, and pneumatic plugs have been checked by above procedures, place plugs in line at each manhole and inflate plugs to 25 psig. Introduce low pressure air into this sealed line until internal air pressure reaches 4 psig greater than average back pressure of ground water that may be over pipe. Allow at least 2 minutes for air pressure to stabilize. After the stabilization period (3.5 psig minimum pressure in the pipe), disconnect air hose from control panel to air supply. Term portion of line being tested “acceptable” if time required for pressure drop from 3.5 to

2.5 psig greater than average back pressure of ground water that may be over pipe is not less than shown in the following table.

2C-3

PIPE SIZE MINIMUM TIME

MINUTES SECONDS

4” 2 0 6” 3 0 8” 4 0

10” 5 0 12” 5 30 15” 7 5 18” 8 30

21” 9 50 24” 11 20

c. In areas where ground water is known to exist, install a 1/2” diameter capped pipe nipple, approximately 10” long, through manhole wall on top of one wastewater line entering manhole. Immediately prior to performance of Line Acceptance Test, determine ground water by removing pipe cap, blowing air through pipe nipple to clear it, and connecting a clear plastic tube to pipe nipple.

Support hose vertically and measure height (in feet) of water over invert of pipe after water stops rising in plastic tube.

Divide this height by 2.3 feet to establish psi to be added to readings.

3. Repair or Replacement - If test determines installation unacceptable, Contractor shall locate source of leakage and repair or replace defective materials and/or workmanship to provide satisfactory installation.

j. Mandrel Testing : All gravity lines utilizing flexible pipe must be tested for deflection by pulling a rigid mandrel through the installed pipe. The test must be conducted at least 30 days after placement and compaction of final backfill. No pipe shall exceed a deflection of 5%. The test must be performed without mechanical pulling devices. The test mandrel must have an outside diameter equal to 95% of the pipe inside diameter; mandrel material must withstand 200 psi without being deformed. Should the mandrel reach an impasse, the line shall be uncovered and repaired. A television test is not an acceptable substitute for the deflection test. Deflectometers may be approved for use on a case by case basis.

2F-1

DIVISION 2 - SITEWORK

SECTION F

DETECTABLE WARNING TAPE

01. GENERAL: Contractor to furnish detectable warning tape for all installations of PVC water and sewer pipe. The tape shall be of the size, type, dimension and color indicated.

02. MATERIALS: The Contractor shall submit descriptive information and evidence that the materials the Contractor proposed for incorporation in to the work is of the kind and quality that satisfies the specified functions and quality.

a) Tape: shall be minimum 5 Mil overall thickness by 12 inches wide, with a solid aluminum foil core. Construction is 2 Mil clear film, with permanent printing. Tape shall conform to ASTM D-2103, D-882, D-2578 and D-671-76. Color coding is as follows:

Color Application Blue Water Lines

Brown Forced Wastewater Lines Green Gravity Wastewater Lines Purple Reclaimed Water Lines

03. CONSTRUCTION METHODS:

a) Installation: The marking tape shall be buried within 12 – 18 inches from the surface of the ground over the centerline of the pipe. The marking tape shall be installed continuously along the installation of the pipe. Sections of tape shall be joined together to provide a continuous installation.

DIVISION 2 - SITEWORK

SECTION J

RESTORATION AND REVEGETATION

01. GENERAL: This specification includes:

a) Restoration: Replacement of existing vegetation in areas disturbed during construction, where vegetation is previously established by planting (yards, lawns or other landscaping).

b) Revegetation: Re-establishment of native vegetation and/or acceptable erosion controls for areas disturbed during construction.

02. MATERIALS:

a) Restoration: All areas disturbed outside the limits of residential lots shall be replaced with a minimum of 6” of topsoil and revegetated per sheet 5 of the construction plans except in solid rock.

b) Revegetation: Revegetation shall be established by hydromulch or SOD.

03. CONSTRUCTION METHODS:

a) Broadcast Seeding:

i) From September 15 to March 1, seeding shall be with a combination of one (1) pound per 1,000 square feet of unhulled Bermuda and four (4) pounds of Winter rye with a purity of 95% and 90% germination.

ii) From March 2 to September 14, seeding shall be with hulled Bermuda at a rate of one (1) pound per 1,000 square feet, with a purity of 95% and 85% germination.

iii) Fertilizer shall be applied once at planting, at a rate of one (1) pound per 1,000 square feet.

b) Watering: The restored areas shall be irrigated or sprinkled in a manner that will not erode the top soil, but will sufficiently soak the soil to a depth of six (6) inches. The irrigation shall occur following placement.

DIVISION 2

SECTION K

TRENCH SAFETY PROGRAM

01. GENERAL

01.01 GENERAL DESCRIPTION OF WORK

A. This work shall consist of shoring, bracing, bank stabilization, bank sloping, providing trench boxes or trench shields or other equivalent means to protect employees from the effects of moving ground or cave-ins for all trenches 5-feet or more in depth.

B. All work shall be done in conformance with OSHA Safety and Health Standards (29 CFR 1926/1010 Chapter XVII Subpart P - Excavations, Trenching and Shoring).

01.02 DEFINITIONS APPLICABLE TO THIS SPECIFICATION

A. "Accepted Engineering Requirements (or Practices)" - Those requirements or practices that are compatible with standards requiring a Registered Professional Engineer, or other duly licensed or recognized authority.

B. "Angle of Repose" - The greatest angle above the horizontal plane at which a material will lie without sliding.

C. "Bank" - A mass of soil rising above a digging level.

D. "Belled Excavation" - A part of shaft or footing excavation, usually near the bottom and bell-shaped; i.e., an enlargement of the cross section above.

E. "Braces (Trench)" - The horizontal members of the shoring system whose ends bear against the uprights or stringers.

F. "Excavation" - Any manmade cavity or depression in the earth's surface, including its sides, walls, or faces, formed by earth removal and producing unsupported earth conditions by reasons of the excavation. If installed forms or similar structures reduce the depth-to-width relationship, an excavation may become a trench.

G. "Faces" - See Paragraph K of this section.

H. "Hard Compact Soil" - All earth materials not classified as running or unstable.

I. "Kickouts" - Accidental release or failure of a shore or brace.

J. "Sheet Pile" - A pile, or sheeting, that may form one of the continuous interlocking line, or a row of timber, concrete, or steel piles, driven in close contact to provide a tight wall to resist the lateral pressure of water, adjacent earth, or other materials.

K. "Sides", "Walls", or "Faces" - The vertical or inclined earth surfaces formed as a result of excavation work.

L. "Slope" - The angle with the horizontal at which a particular earth material will stand indefinitely without movement.

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M. "Stringers (Wales)" - The horizontal members of a shoring system whose sides bear against the uprights or earth.

N. "Trench" - A narrow excavation made below the surface of the ground. In general, the depth is greater than the width, but the width of a trench is not greater than 15-feet.

O. "Trench Shield" - A shoring system composed of steel plates and bracing, welded or bolted together, which support the walls of a trench from the ground level to the trench bottom and which can be moved along as work progresses.

P. "Unstable Soil" - Earth material, other than running, that because of its nature of the influence of related conditions, cannot be depended on to remain in place without extra support, such as would be furnished by a system of shoring.

Q. "Uprights" - The vertical members of a shoring system.

R. "Wales" - See Paragraph M of this section.

S. "Walls" - See Paragraph K of this section.

02. PRODUCTS

Products are to be furnished as required for acceptable trench safety program.

03. EXECUTION

03.01 GENERAL PROTECTION REQUIREMENTS

A. Walkways, runways, and sidewalks shall be kept clear of excavated material or other obstructions and no sidewalks shall be undermined unless shored to carry a minimum live load of one hundred twenty five (125) pounds per square foot.

B. If planks are used for raised walkways, runways or sidewalks, they shall be laid parallel to the length of the walk and fastened together against displacement.

C. Planks shall be uniform in thickness and all exposed ends shall be provided with beveled cleats to prevent tripping.

D. Raised walkways, runways and sidewalks shall be provided with plank steps on strong stringers.

Ramps, used in lieu of steps, shall be provided with cleats to insure a safe walking surface.

E. All employees shall be protected with personal protection equipment for the protection of the head, eyes, respiratory organs, hands, feet, and other parts of the body as set forth in OSHA Standards.

F. Employees exposed to vehicular traffic shall be provided with and shall be instructed to wear warning vests marked with or made or reflectorized or high visibility material.

G. Employees subjected to hazardous dusts, gases, fumes, mists, or atmospheres deficient in oxygen, shall be protected with approved respiratory protection as set forth in OSHA Standards.

H. No person shall be permitted under loads handled by power shovels, derricks, or hoists. To avoid any spillage, employees shall be required to stand away from any vehicle being loaded.

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I. Daily inspections of excavations shall be made by a competent person. If evidence of possible cave-ins or slides is apparent, all work in the excavation shall cease until the necessary precautions have been taken to safeguard the employees.

03.02 SPECIFIC EXCAVATION REQUIREMENTS

A. Prior to opening an excavation, effort shall be made to determine whether underground installations (i.e., sewer, telephone, water, fuel, electric lines, etc.) will be encountered, and if so, where such underground installations are located. When the excavation approaches the estimated location of such an installation, the exact location shall be determined and when it is uncovered, proper supports shall be provided for the existing installation. Utility companies shall be contacted and advised of proposed work prior to the start of actual excavation.

B. Trees, boulders, and other surface encumbrances, located so as to create a hazard to employees involved in excavation work or in the vicinity thereof at any time during operations, shall be removed or made safe before excavating is begun.

C. The walls and faces of all excavations in which employees are exposed to danger from moving ground shall be guarded by a shoring system, sloping of the ground, or some other equivalent means.

D. Excavations shall be inspected by a competent person after every rainstorm or other hazard-increasing occurrence, and the protection against slides and cave-ins shall be increased if necessary.

E. The determination of the angle of repose and design of the supporting system shall be based on careful evaluation of pertinent factors such as: depth of cut; possible variation in water content of the material while the excavation is open; anticipated changes in materials from expose to air, sun, water, or freezing; loading imposed by structures, equipment, overlying materials, or stored material; and vibration from equipment, blasting, traffic, or other sources.

F. Supporting systems (i.e., piling, cribbing, shoring, etc.) shall be designed by a qualified person and meet accepted engineering requirements. When tie rods are used to restrain the top of sheeting or other retaining systems, the rods shall be securely anchored well back of the angle of repose. When tight sheeting or sheet piling is used full loading due to ground water table shall be assumed, unless prevented by weep holes or drains or other means. Additional stringers, ties, and bracing shall be provided to allow for any necessary temporary removal of individual supports.

G. All slopes shall be excavated to at least the angle of repose except for areas where solid rock allows for line drilling or presplitting.

H. The angle of repose shall be flattened when an excavation has water conditions, silty materials, loose boulders, and areas where erosion deep frost action and slide planes appear.

I. Clearances:

1. In excavations which employees may be required to enter, excavated or other material shall be effectively stored and retained at least 2-feet or more from the edge of excavation.

2. An as alternative to the clearance prescribed in subparagraph 1. of this paragraph, the

Contractor may use effective barriers or other effective retaining devices in lieu thereof in order to prevent excavated or other materials from falling into the excavation.

J. Sides, slopes, and faces of all excavations shall meet accepted engineering requirements by scaling, benching, barricading, rock bolting, wire meshing, or other equally effective means.

Special attention shall be given to slopes that may be adversely affected by weather or moisture content.

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K. Support systems shall be planned and designed by a qualified person when excavation is in excess of 20-feet in depth, adjacent to structures or improvements, or subject to vibration or ground water.

L. Materials used for sheeting, sheet piling, cribbing, bracing, shoring, and underpinning shall be in good serviceable condition, and timbers shall be sound, free from large or loose knots, and of proper dimensions.

M. Special precautions shall be taken in sloping or shoring the sides of excavations adjacent to previously backfilled excavation for a fill, particularly when the separation is less than the depth of the excavation. Particular attention also shall be paid to joints and seams of material comprising a face and the slope of such seams and joints.

N. Except in hard rock, excavations below the level of the base of footing of any foundation or retaining wall shall not be permitted, unless the wall is underpinned and all other precautions taken to insure the stability of the adjacent walls for the protection of employees involved in excavation work or in the vicinity thereof.

O. If the stability of adjoining building or walls is endangered by excavations, shoring, bracing or underpinning shall be provided as necessary to insure their safety. Such shoring, bracing, or underpinning shall be inspected daily or more often, as conditions warrant, by a competent person to insure protection is effectively maintained.

P. Diversion ditches, dikes, or other suitable means shall be used to prevent surface water from entering an excavation and to provide adequate drainage of the area adjacent to the excavation.

Water shall not be allowed to accumulate in an excavation.

Q. If it is necessary to place or operate power shovels, derricks, trucks, materials, or other heavy objects on a level above and near an excavation, the side of the excavation shall be sheet-piled, shored, and braced as necessary to resist the extra pressure due to such superimposed loads.

R. Blasting and the use of explosives are not allowed unless authorized in other portions of the specifications.

S. When mobile equipment is utilized or allowed adjacent to excavations, substantial stop logs or barricades shall be installed. If possible, the grade should be away from the excavation.

T. Adequate barrier physical protection shall be provided at all remotely located excavations. All wells, pits, shafts, etc., shall be barricaded or covered. Upon completion of exploration and similar operations, temporary wells, pits, shafts, etc., shall be backfilled.

U. If possible, dust conditions shall be kept to a minimum by the use of water.

V. In locations where oxygen deficiency or gaseous conditions are possible, air in the excavation shall be tested. Controls, as set forth in OSHA Standards shall be established to assure acceptable atmospheric conditions.

When flammable gases are present, adequate ventilation shall be provided or sources of ignition shall be eliminated. Attended emergency rescue equipment, such as breathing apparatus, a safety harness and line, basket stretcher, etc., shall be readily available where adverse atmospheric conditions may exist or develop in an excavation.

W. Where employees or equipment are required or permitted to cross over excavations, walkways or bridges with standard guardrails shall be provided.

X. Where ramps are used for employees or equipment, they shall be designed and constructed by qualified persons in accordance with accepted engineering requirements.

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Y. All ladders used on excavation operations shall be in accordance with the requirements of OSHA Standards.

03.03 SPECIFIC TRENCHING REQUIREMENTS

A. Banks more than 5-feet high shall be shored, laid back to a stable slope, or some other equivalent means of protection shall be provided where employees may be exposed to moving ground or cave-ins. Trenches less than 5-feet in depth shall also be effectively protected when examination of the ground indicates hazardous ground movement may be expected.

B. Sides of trenches in unstable or soft material, 5-feet or more in depth, shall be shored, sheeted, braced, sloped, or otherwise supported by means of sufficient strength to protect the employees working within them.

C. Sides of trenches in hard or compact soil, including embankments, shall be shored or otherwise supported when the trench is more than 5-feet in depth and 8-feet or more in length. In lieu of shoring, the sides of the trench above the 5-foot level may be sloped to preclude collapse, but shall not be steeper than a 1-foot rise to each ½-foot horizontal. When the outside diameter of a pipe is greater than 6-feet, a bench of 4-foot minimum shall be provided at the toe of the sloped portion.

D. Materials used for sheeting and sheet piling, bracing, shoring, and under-pinning, shall be in good serviceable condition, and…