Schedule 5 - Supplemental Construction Specifications

1.0 General

(replace 1.0.6)

1.0.6

The City of Kelowna is responsible for issuing Road Usage Permits and conditions set forth, in accordance with Traffic Bylaw No. 8120. The Contractor will be required to obtain a Road Usage Permit prior to work within City Right-of-Way.  For projects involving arterial roads, Traffic Control Plans shall be prepared or reviewed and approved by a Professional Engineer with traffic experience or a Professional Traffic Operations Engineer (PTOE). Step by step reference can be found in the "City of Kelowna Traffic Management Guide" at the City’s website kelowna.ca.

1.0.7

In addition to the Public Notice required in Section 01 58 01, the Contractor shall provide additional written notice to residents and businesses one day prior to access closures or restrictions. The content and form of the written notifications shall be reviewed and approved by the Contract Administrator prior to delivery. Emergency, vehicle and pedestrian access to all businesses and residences shall be maintained at all times unless otherwise approved by the Contract Administrator. Suitable access shall have a minimum lane width of 3.0m and be defined as a bladed and comfortable driving surface, free of potholes and other impediments, sufficient to accommodate a standard two-wheel drive passenger vehicles at a speed of 20 km/h.

1.0.8

Working hours are outlined in Good Neighbour Bylaw No. 11500. Requests to vary working hours must be approved in advance, in accordance with the provisions of Bylaw No. 11500.

1.0.9

All regulatory signs that are affected by the work must be removed and replaced by the City of Kelowna in accordance with Traffic Bylaw No. 8120. Requests for sign changes must be made 15 Days in advance of proposed work.

3.0 Execution

3.10 Luminaires and Photocells

(replace 3.10.2)

3.10.2

Install post top and pendant fixtures level. Cobra style fixtures to be installed parallel with the longitudinal grade of the road surface, to reduce glare on the downhill side.

1.0 General

1.11 Inspection and Testing

(add)

1.11.2

The frequency of density tests for subbase shall be at least one test per 150 m2 placed, minimum one per day, and the test interval shall be consistent and evenly spaced along length and width of the Work. For Work that involves roadway, curb and sidewalk, test locations shall be staggered amongst the travelled lanes, curbs, and sidewalks.

2.0 Products

2.1 Materials

(replace 2.1.1)

2.1.1

Asphalt cement: to CGSB-16.3-M90, Grade 80-100, Class A or PG 64-22.

(replace (2))

2.1.3

(2) Gradations to be within limits specified when tested to ASTM D5444.

(replace (8))

(8) Micro Deval % Loss:  ASTM D6928, Coarse Aggregate: 18 max.

(replace (12))

(12) Crushed fragments (fraction retained on 4.75mm sieve): at least 85% of particles by mass, to have at least 2 freshly fractured faces. Determination of amount fractured material will be in accordance with MoTI Specification I-11, Fracture Count for Coarse Aggregate, Method “B”, which determines fractured faces by mass.

2.2 Mix Design

(replace full section)

2.2.1

The Contractor, at their cost, must retain a Canadian Council of Independent Laboratories (CCIL) certified, independent testing consultant to perform trial mix designs and to submit the job mix formula. The trial mix design must be performed in accordance with the current Asphalt Institute MS-2 and ASTM D6926 (75 blows per face) and must include five (5) separate trial values of asphalt content. The Contractor must pay for trial mix designs and submissions.

2.2.2

Mixes may contain up to 20% of Reclaimed Asphalt Pavement (RAP) without changing binder grade, provided that the properties of RAP material are considered in the trial mix design. Submissions for RAP mixes must contain all data relevant to RAP utilized in the mix design. Use of Recycled Asphalt Shingles (RAS) will not be permitted.

The amount of total AC in the RAP will be calculated as follows:

2.2.3

Design of mix:  Include the following data with the trial mix design submission:

1. Aggregate bulk specific gravity and water absorption.
2. Sand equivalent, Micro Deval, Flat and Elongated, Coarse Aggregate Fracture, Fine Aggregate Angularity and Manufactured Fine Content values.
3. Asphalt cement properties including mixing and compaction temperatures, based on temperature viscosity properties of asphalt cement.
4. A graph of the temperature-viscosity relationship for the asphalt cement.
5. Aggregate gradations and blending proportions.
6. Maximum theoretical density of trial mixes.
7. Asphalt absorption values.
8. Information on additives, including source, type, percent by mass of asphalt cement and test results when anti-stripping tests are required.
9. Percent Air Voids, Marshall flow, voids in the mineral aggregate, and Marshall stability of the mixture selected.
10. Graphs of the air voids, Marshall flow, voids in the mineral aggregate and Marshall stability plotted against asphalt cement content.
11. Mix physical requirements to meet Table 2.2.3 below.
12. Do not change job-mix without prior approval from the Contract Administrator. Should change in material source be proposed, new job-mix formula to be submitted to the Contract Administrator for review and approval.

Notes:

1. Percent air voids in compacted trial mixes must be determined in accordance with ASTM D3203, with asphalt cement absorbed into the aggregate compensated for in the calculation.
2. In accordance with AASHTO T 283

3.0 Execution

3.1 Plant and Mixing Requirements

(replace (3))

3.1.1 Batch and continuous mixing plants:

(3) Before mixing, dry aggregates to a moisture content not greater than 1.0% by mass or to a lesser moisture content if required to meet mix design requirements.

(9) Where RAP is to be incorporated into the mix:  

(add)

(5) RAP shall be introduced such that the RAP is not directly exposed to the flame.

(replace (1))

3.1.4 Mix tolerances including variations resulting from adding RAP:

(1) Permissible variation in aggregate gradation from job mix (percent of total mass):

3.2 Equipment

(add)

3.2.1

1. Pavers must be capable of placing a standard mat width not less than 3 m and must be capable of paving wider widths in 150 mm and 300 mm increments by means of equipment supplied by the manufacturer of the equipment. The screed must include a tamping bar or strike-off device.
2. Control of the screed must be by automatic sensing devices. Longitudinal control must be by a sensor that follows a stringline, ski or other reference. The grade sensor must be movable, and mounts provided so that grade control can be established on either side of the paver. A slope control sensor must be provided to maintain the proper transverse slope of the screed.

3.6 Compaction

(add)

3.6.1

Re-rolling of the asphalt will not be accepted as a remedy to increase test that do not meet specifications.

(replace (1))

3.6.2 General

(1) Provide sufficient compaction equipment to ensure that the compaction rate meets or exceeds the placement rate and to ensure that specified density is achieved before the temperature of the mat falls below 100°C.

3.7 Joints

(add)

3.7.1 General

(4) When placing final pavement layer against concrete curb & gutter, compacted pavement must meet the gutter at the same elevation or a maximum of 10 mm above and along the entire lip of the gutter. For reverse grade gutter, compacted pavement must meet the gutter at the same elevation to prevent ponding.

4.0 Compliance with Specifications and Payment Adjustment for Non-Compliance

4.1 General

(add following Sub-Sections)

4.1.1

The Contractor Shall provide a finished product conforming to the quality and tolerance requirements of this Specification. Where no tolerances are specified, the standard of workmanship shall be in accordance with accepted industry standards.

4.1.2

Acceptance of any unit of work area at full payment will occur if there are no obvious defects and the results of asphalt content, pavement density, air voids and thickness meet or exceed specified tolerances.

4.1.3

Unit price reductions will only be applied based on full quality assurance testing in accordance with Table 5.3.4.

4.1.4

The Engineer of Record who provides a letter of professional assurance for asphalt paving must satisfy the requirements of this specification.  Quality control and quality assurance documentation must be available upon request.  Companion samples taken as part of quality assurance testing must be available upon request by the City Engineer. 

4.1.5

Any material or workmanship deficiencies are subject to either a payment adjustment to be paid to the City of Kelowna or removal and replacement.  Payment adjustments will be determined by the guidelines in this specification.  Removal and replacement will be at the discretion of the City Engineer.

4.2 Aggregate Gradation

4.2.1

When the aggregate fails to comply with tolerances set forth in Section 3.1.4.1 of this specification, the City Engineer will initiate the following action:

(1) When two consecutive gradation analyses identify non-compliance with the specified tolerances, the contractor shall be notified in writing and a third test will be completed.

(2) If the third test indicates aggregate gradation non-compliance, the Contractor must suspend asphalt production and placement until corrective action has been taken and additional testing shows compliance with specified tolerance limits.

4.3 Asphalt Cement

4.3.1

Payment adjustment for non-compliance with the tolerance specified:

4.3.2

Adjustment for asphalt cement (AC) content non-compliance to the amount payable for Hot Mix Asphalt Paving equals the unit bid price times the payment adjustment factor times the quantity to which the factor is to be applied, i.e.:

4.4 Pavement Thickness

4.4.1

Pavement of any type found to be deficient in thickness by more than 10 mm must be removed and replaced by pavement of specified thickness, at the contractor’s expense.

4.4.2

Pavement of any type found to be deficient by less than 10 percent of its specified compacted thickness will not be subject to payment adjustment for thickness non-compliance.

4.4.3

Pavement of any type found to be deficient in thickness by more than 10 percent of its specified thickness but not more than 10 mm shall give rise to an adjustment in the amount to be paid to the Contractor. The adjustment shall be subtracted from the amount otherwise payable to the Contractor, and the amount of the adjustment will be paid to the City. The adjustment shall be calculated as follows:

Note:

No allowance will be made for the tolerance provided for in Section 4.4.2. No payment will be made for additional thickness.

4.5 Density

4.5.1

The minimum specified density for acceptance, without payment adjustment, must be 97% of the 75 blow Marshall bulk relative density as most recently determined by the appointed testing agency.

4.5.2

Payment adjustment for density non-compliance will be as follows:

Note 1: Subject to removal and replacement at the discretion of the City Engineer.

Adjustment for density specification non-compliance shall be determined as follows:

4.6 Adjusted Payments

4.6.1

The total adjustment arising from pavement deficiencies identified in the foregoing shall be determined as follows:

The total adjustment (A_r) shall be applied to the unit price for the quantity of work being accessed.

4.7 Segregation

4.7.1

The finished surface shall have a uniform texture and be free of segregated areas. A segregated area is defined as an area of the pavement where the texture differs visually from the texture of the surrounding pavement.

4.7.2

All segregation will be assessed using ASTM E965. The City Engineer to determine repair requirements.

The severity of segregation will be rated as follows:

Slight - The matrix of asphalt cement and fine aggregate is in place between the coarse aggregate particles, however there is more stone in comparison to the surrounding acceptable mix.

Moderate - Significantly more stone than the surrounding mix and exhibit a lack of surrounding matrix.

Severe - Appears as an area of very stony mix, stone against stone, with very little or no matrix.

4.7.3

Areas of moderate segregation may be left in place for lower courses, subject to approval of the City Engineer, but are considered defective areas for surface course. Areas of severe segregation are considered defective areas for lower and surface courses. Defective areas shall be removed and replaced with acceptable hot mix asphalt of the same type and compacted to the satisfaction of the City Engineer.

4.7.4

Any other methods of repair proposed by the Contractor will be subject to the approval of the City Engineer.

4.7.5

Repairs will be carried out by the Contractor at their expense.

4.8 Smoothness

4.8.1

The completed asphalt concrete surface shall be smooth and true to the established crown and grade. The surface course shall be free from deviations exceeding 5 mm as measured in any direction with a 3 m straight edge.

4.8.2

When deviations more than the above tolerances are found, the pavement surface shall be corrected by methods satisfactory to the City Engineer. Correction of defects shall be carried out until there are no deviations anywhere greater than the allowable tolerances.

5.0 Testing Frequency and Procedures

5.1 General

5.1.1

The City Engineer shall have access to all production processes and materials used for the work to monitor material quality as often as deemed necessary.  Such inspection and testing shall not in any way relieve the Contractor of the responsibility for meeting the requirements of this specification.

5.1.2

At least three weeks prior to commencing work, inform the Contract Administrator of the proposed source of aggregates, provide access for sampling, provide equipment to obtain representative samples from stockpiles, and provide samples of asphalt cement in accordance with Section 2.1.1.

5.1.3

The unit of work area considered for acceptance is each 1,500 m2 of continuous paving production.  When less than 1,500 m2 is produced in a construction period the actual production for that period may, at the discretion of the Contract Administrator, be added to the previously completed pavement construction.

5.1.4

Minimum testing outlined in Table 5.3.4 must be completed for full payment and acceptance of work.

5.2 Quality Control

5.2.1

Quality control is the responsibility of the Contractor throughout every stage of the project, to ensure that all materials and work conform to the requirements as specified in the Contract Documents.

5.2.2

Reclaimed asphalt pavement (RAP) shall be considered as an aggregate for the purposes of quality control.

5.2.3

All quality control shall be conducted by qualified personnel.  The Contractor shall bear the cost of all quality control testing and consulting services.

5.2.4

Quality Control testing, sampling and minimum frequencies are described in Table 5.2.4, Quality Control Requirements.

5.2.5

Pre-Production Quality Control test data as specified in Table 5.2.4 shall be reported to the City Engineer one week prior to commencing the project, or as requested.

Note 1:

Where an individual test indicates non-compliance, the Contractor must immediately initiate remedial measures, and submit, at its expense, evidence that compliance exists with the approved mix design.

Note 2:

Coring is subject to the approval of the Contract Administrator.

5.3 Quality Assurance

5.3.1

Acceptance of all hot mix asphalt material and paving will be based on the results of Quality Assurance (QA) testing from a lab that is Canadian Council of Independent Laboratories (CCIL) certified.

5.3.2

Quality assurance testing is the responsibility of the Contract Administrator for acceptance of work completed.

5.3.3

Quality Assurance sampling and testing is described in Table 5.3.4, Quality Assurance Minimum Testing Requirements.

5.3.4

Quality Assurance Sampling Procedures:

(1)   Loose mix samples shall be acquired from the work site in accordance with ASTM D979.  Sampling from the auger can be substituted for this standard provided that no sample segregation is probable.  Companion samples must be taken for use as 3rd Party appeal test samples.

(2)   The timing of mix sampling shall be stratified, with each sample representing a similar production quantity.

(3)   Core locations will be selected using representative random sampling procedures.  The unit of work area will be divided into segments meeting or exceeding the minimum frequency in Table 5.3.4 and of approximately equal area.  The longitudinal coordinates will have similar spacing on roadway and transverse coordinates will be located using random numbers.  Coring locations will be determined in the office prior to sampling, approved by the Contract Administrator.  Core sampling requires written approval by the City of Kelowna.

(4)   Areas within 5.0 m of transverse joints or 0.5 m of a mat edge are excluded from compaction acceptance sampling and testing.

(5)   The Contract Administrator for a private project must be able to provide the opportunity for the City Engineer to sample paving materials when the City of Kelowna deems it necessary.

5.4 Appeal of Quality Assurance Testing Results

5.4.1

The Contractor may appeal the results of acceptance testing for Compaction Standardor Asphalt Content  for any area subject to rejection or unit price reduction.  The notice of appeal shall be in writing and submitted to the City Engineer within 7 days of receipt of the acceptance testing results.

5.4.2

Appeals will only be considered if a cause can be proven, and the requirements of Table 5.2.4 have been satisfied.

5.4.3

Quality Control tests initiated after the Contractor’s receipt of the Quality Assurance test results will not be considered when evaluating cause for appeal.  Heating and remolding pavement cores for the purpose of determining asphalt content, gradation or Marshall volumetric properties is not acceptable.

5.4.4

Only Quality Control testing during production for the subject project will be considered when evaluating cause for appeal provided test results are submitted to the City Engineer prior to the receipt of the acceptance testing results.

5.4.5

Laboratories conducting acceptance testing for appeals must be CCIL certified for the subject test procedures.

5.5 Asphalt Content, Compaction Standard or Air Void Appeals

5.5.1

The testing laboratory conducting the project acceptance sampling and testing will routinely retain companion samples sufficient for the determination of asphalt content, maximum relative density and/or Marshall relative density.  Minimum companion sample size should be 10 kg for this purpose.

5.5.2

For asphalt content, compaction standard or air void (Marshall relative density) appeal testing, the Contractor will have the option for the testing to be done by the testing laboratory undertaking the Quality Assurance testing, or an independent testing laboratory selected by the City Engineer.  If the independent testing laboratory does not have a valid asphalt correction factor as per ASTM D6307 - Asphalt Content of Hot Mix Asphalt by Ignition Oven the lab should have the capability to perform ASTM D2172 - Quantitative Extraction of Bitumen from Bituminous Paving Mixtures.

5.5.3

The appeal test results will be used for acceptance and unit price adjustment and shall be binding on both the City of Kelowna and the Contractor.

5.5.4

If the new asphalt content, new compaction and/or new air voids content verifies that any unit price reduction or rejection applies for that area of work, the costs of the appeal sampling and testing will be borne by the Contractor.  If the results show that a penalty or rejection no longer applies, the sampling and appeal costs will be the responsibility of the City of Kelowna.

5.6 Core Density and Thickness Appeals

5.6.1

Core density and thickness appeals will only be considered if a case can be made that the stratified random sampling plan was biased, or sampling and testing was in error.

1.0 General

1.0.1

Section 32 91 23S refers to those portions of the work that are unique to the use of soil cells for the planting of trees and landscaping in pedestrian and vehicular areas.  This section must be referenced to and interpreted simultaneously with all other sections pertinent to the works described herein.

1.1 Related Work

1.1.1

Concrete Walks, Curbs and Gutters    Section 03 30 20

1.1.2

Cast-in-Place Concrete    Section 03 30 53

1.1.3

Aggregates and Granular Materials    Section 31 05 17

1.1.4

Excavation, Trenching and Backfilling    Section 31 23 01

1.1.5

Roadway Excavation, Embankment and Compaction    Section 31 24 13

1.1.6

Geosynthetics    Section 31 32 19

1.1.7

Granular Base    Section 32 11 23

1.1.8

Topsoil and Finish Grading    Section 32 91 21

1.1.9

Irrigation System    Section 32 94 01S

1.1.10

Planting of Trees, Shrubs and Ground Covers    Section 32 93 01

1.2 Mockup

1.2.1

Prior to the installation of soil cell system, construct a mockup of complete installation at the discretion of the Contract Administrator. 

1.2.2

Mock up to be a minimum 10m2 in area and to consist of complete soil cell system, including soil cell frames, geogrid, growing medium, soil cell deck and geotextile, all installed in excavation on prepared and approved granular base, geotextile, and subgrade.

1.2.3

Mock up may, upon approval of the Contract Administrator, remain as part of the installed work at end of project if it remains in good condition and meets requirements of Contract Documents.  Otherwise, mock-up to be removed at Contractor’s expense.

1.3 Site Conditions

1.3.1

Inspect all areas to receive soil cells prior to placement. Before proceeding with work check and verify dimensions, quantities, grade elevations, drainage, compaction, and contamination.

1.3.2

Report defects in dimensions, quantities, grade elevations, drainage, compaction and contamination to the Contract Administrator immediately and make good to satisfaction of the Contract Administrator prior to construction of soil cell system.

1.4 Delivery, Storage and Handling

1.4.1

Deliver packaged materials in original, unopened containers showing weight, certified analysis and name and address of manufacturer.

1.4.2

Do not handle, deliver or place bulk materials in frozen, wet or muddy conditions. Deliver materials to site at or near optimum compaction moisture content.

1.4.3

Protect excavation from freezing conditions, accumulation of water and contamination until placement of soil cells, growing medium, geotextile and root barrier.  Maintain protection of excavation and placed material until installation of hard surfaced roadway or pedestrian surface above.

1.4.4

Growing medium, granular base and backfill that is excessively wet, segregated or contaminated will be rejected.  Remove rejected material from site and replace with approved material at Contractor’s expense. 

1.5 Layout and Elevation Control

1.5.1

Provide layout and elevation control during installation of soil cells.  Utilize grade stakes, benchmarks, surveying equipment and other means and methods to ensure that layout and elevations conform to layout and elevations shown on Contract Drawings.

1.6 Scheduling

1.6.1

Schedule installation of soil cells after all affecting walls, curbs, footings and utility work in the area have been installed. Coordinate schedule with scheduling of other trades on site.

1.7 Measurement and Payment

1.7.1

Payment for soil cells will be made separately for each vertical column of soil cell assembly, and includes all soil cell components, growing medium, site preparation, placement, geogrid and geotextile, protection of work and incidentals.  Payment will be made separately for assemblies comprised of one, two or three layers of soil cell frames.

1.7.2

Payment for excavation, backfilling and embankment of soil cells will be made under Section 31 23 01 - Excavating, Trenching and Backfilling or Section 31 24 13 - Roadway Excavation, Embankment and Compaction, as provided in the Schedule of Quantities and Unit Prices.

1.7.3

Payment for placement and compaction of granular base will be made under Section 32 11 23 - Granular Base, as provided in the Schedule of Quantities and Unit Prices.

1.7.4

Payment for pedestrian or vehicle surfaces above soil cells will be made under separate sections as appropriate.

1.7.5

Payment for tree planting, associated non-soil cell growing medium, root barrier, tree grates and concrete surrounds will be made under separate sections as appropriate.

1.8 Inspection and Testing

1.8.1 

Refer to General Conditions, Clause 4.12, Inspections and Testing

1.8.2

Refer to Section 32 91 21 - Topsoil and Finish Grading - 1.3 and 1.5.

2.0 Products

2.1 Soil Cells

2.11

Soil cell to be fiberglass-reinforced polypropylene structure, or other materials, designed to support sidewalk loads, designed to be filled with growing medium for the purpose of growing tree roots, and for rainwater filtration, detention and retention.

Acceptable soil cell systems include the following:

(1)       Silva Cell by DeepRoot Partners, including:

1. Silva Cell frame:  400 x 600 x 1200 mm
2. Silva Cell deck:  50 x 600 x 1200 mm, including manufactured installed galvanized steel tubes
3. Silva Cell modified:  400 x 600 x 150 mm modified Silva Cell frame designed to stiffen and align frames as growing medium and backfill is placed
4. Silva Cell deck screws:  manufacturer supplied stainless steel screws to attach decks to frames

(2)       Approved Equal.

2.2 Anchor Spike

2.2.1

Galvanized steel spike with spiral twist, 8mm diameter and 250mm length.

2.3 Drainage Pipe

2.3.1

Drainage pipe to be perforated drainpipe per Section 33 40 01 - Storm Sewers - 2.7, as specified on Drawings.

2.3.2

Fittings to be compatible with specified pipe and by same manufacturer.

2.3.3

PVC pipe solvent and primer combinations shall be as recommended by manufacturer and suitable for use with specified materials and application.

2.4 Inspection Riser Assembly

2.4.1

Inspection riser to be 100mm diameter Schedule 40 non-perforated PVC pipe per Section 32 94 01S– Irrigation System.  Cut four (4) 3mm wide slots in bottom of pipe that extend to soil cell deck to allow water access for inspection.

2.4.2

Fittings and caps to be compatible with specified pipe and by same manufacturer.  Cap to be solid threaded cleanout or removable inlet grate designed to fit inspection riser and be compatible with pedestrian traffic and operational practice.

2.5 Geogrid

2.5.1

Geogrid to be high molecular weight high tenacity polyester multifilament yarns woven in tension and polymer-coated, with the following ASTM D 6637 mechanical properties:

1. Tensile strength:                                                        29.2 kN/m
2. Creep reduced strength:                                         18.5 kN/m
3. Long term allowable design load:                       18.5 kN/m
4. Grid aperture size (machine direction):             22.2mm
5. Grid aperture size:                                                     25.4mm
6. Mass /unit area (ASTM D 5261):                           254.3 g/m2

2.6 Geotextile

2.6.1

Geotextile to be non-woven polypropylene fabric, with the following properties:

1. Grab tensile strength:                      167.8 kg
2. Grab tensile elongation:                  50%    
3. Mullen burst strength:                     2,620 kPa
4. Puncture strength:                            58.97 kg
5. Apparent opening size:                   US sieve 80 (0.180 mm)
6. Water flow rate:                                 3,870.8 l/min/m2
7. Minimum roll width:                         3600 mm

2.7 Granular Base

2.7.1

Granular base and subbase to be as shown on Contract Drawings and to conform to Section 32 11 23 - Granular Base.

2.8 Backfill

2.8.1

Backfill material adjacent to soil cells to be as shown on Contract Drawings.

2.9 Growing Medium

2.9.1

Growing medium to be as shown on Contract Drawings and to conform to Section 32 91 21– Topsoil and Finish Grading.

2.10 Root Barrier

2.10.1

Root barrier to be per Section 32 93 01 - Planting of Trees, Shrubs and Ground Covers - 2.15.

3.0 Execution

3.1 Soil Cell Frame

3.1.1

Confirm that granular base meets compaction requirements of 95% of maximum dry density in accordance with ASTM D698 Standard Proctor method prior to placement of soil cell frame units.  Grade sub-base surface on a plane parallel to the proposed finish grade above.

3.1.2

Identify tree openings, utility routes and edges of hard surfaces above soil cells on granular base using spiked string and/or spray paint. 

3.1.3

Confirm that width and length of excavation are a minimum of 150mm beyond the edges of the Soil Cells. Layout location of all drain lines. Do not locate drain lines within 150mm of any Soil Cell post.  Provide field engineering when drain lines are being installed to assure that the slope on all drains is 1% minimum towards intended outfalls. Place frame units by hand.

3.1.4

Place first layer of frame units on prepared and approved granular base and geotextile. Work away from tree and utility openings. Place frame units no less than 25mm apart and no more than 75mm apart.

3.1.5

Verify that horizontal and vertical position of frame units are consistent with required locations and dimensions of tree and utility openings, paving edges, surfaces and other structures to be constructed above soil cells. Report conflicts to the Contract Administrator and make adjustments as necessary.

3.1.6

Ensure that each frame unit sits firmly on granular base.  Ensure frames do not rock or bend over any stone or other obstruction and do not bend into dips in base.

3.1.7

Check each frame unit for damage prior to placing in excavation.  Do not use frame units that are cracked or chipped.

3.1.8

Secure soil cell to granular base with four anchor spikes driven through molded holes in base of frame unit.

3.1.9

For applications where soil cells are installed over waterproofed structures, develop a spacing system consistent with requirements of waterproofing system and do not use anchor spikes that will come within 150mm of any waterproofing material.  Submit shop drawing of spacing and anchoring system for approval by the Contract Administrator.

3.1.10

Install next layer of frame units on top of previous layer. Build layers as stacks of frame units set one directly over the other.  Do not set frame unit half on one unit below and half on another unit.

3.1.11

Register each upper frame unit on top of lower frame unit post. Ensure contact points are free of dirt, mud and debris prior to placement.  Ensure each upper unit is solidly seated on unit below. Rotate each frame registration arrow in the opposite direction from frame unit below to ensure connector tabs firmly connect.

3.1.12

Install no more than two layers of frame units before installation of growing medium and backfill.

3.2 Modified Soil Cell Frame

3.2.1

Install modified frame unit on top of frame unit prior to installation of growing medium and backfill.  Modified frame unit is required only during installation and compaction of growing medium and backfill.

3.2.2

Remove modified frame unit prior to installation of deck unit and as installation of growing medium and backfill progresses across soil cell framework. Place and remove modified frame units by hand.

3.3 Geogrid

3.3.1

Install geogrid curtain prior to installation of growing medium and backfill.

3.3.2

Geogrid curtain is required between edge of soil cell and any backfill or granular base beyond extent of soil cell framework that will support pedestrian or vehicular paving.

3.3.3

Install geogrid curtain where required.  Do not install geogrid curtain between edge of soil cell and any planting area or tree opening adjacent to soil cell.

3.3.4

Pre-cut geogrid to allow for 150mm minimum underlap below backfill, and 300mm minimum overlap above soil cell deck.

3.3.5

Where soil cell layout causes a change of direction in plane of geogrid, slice top and bottom flaps of geogrid and fold so it lies flat on top of soil cell deck and granular base course along both planes.

3.3.6

Provide 300mm minimum overlap between different sheets of geogrid.

3.3.7

Secure geogrid to frame units and deck units with 4.5mm x 300mm plastic zip ties in locations recommended by manufacturer.  After deck unit is secured in place fold 300mm overlap of geogrid over top of unit.

3.4 Growing Medium and Backfill

3.4.1

Install root barrier as shown on Contract Drawings.  Protect root barrier from damage and displacement during installation of growing medium and backfill.

3.4.2

Install growing medium and backfill as indicated on Contract Drawings.  The process of installation requires that these two materials be installed and compacted together in alternating lifts to achieve correct compaction relationships between the materials.

3.4.3

Place growing medium in soil cell framework and spread by hand or hand tool through each soil cell in a maximum 200mm lift.  Work soil under horizontal beams of soil cell frame and utility conduit to eliminate air pockets there.  Ensure equipment bucket does not contact soil cell framework.  Hold plywood sheet against geogrid during placement and compaction of growing medium to protect geogrid and maintain consistent separation of materials.

3.4.4

Finalize installation of utility conduit, drainage pipes and irrigation where shown on Contract Drawings.

3.4.5

Compact growing medium lift by stepping on entire exposed surface of growing medium.   Do not step on frame units.  Ensure there is a minimum of 250mm of growing medium over horizontal beams of frame units before beginning compaction.  Leave top 50mm of frame unit exposed above growing medium to allow placement of next layer of frame units.

3.4.6

Compact growing medium to 85% of standard proctor density.  Remove growing medium that is over compacted and reinstall.

3.4.7

Place backfill to 95% of maximum dry density in space between geogrid and sides of excavation and spread by hand adjacent to soil cell framework to provide maximum 200nn lift.  Ensure geogrid  under lap lays flat under backfill.  Ensure equipment bucket does not contact soil cell framework.  Hold plywood sheet against geogrid during placement and compaction of backfill to protect geogrid and maintain consistent separation of materials.  Do not place backfill material in tree or planting bed opening.

3.4.8

Compact backfill per Contract Documents.  Ensure compaction equipment does not contact soil cell frame or deck.

3.4.9

Repeat placement and compaction of growing medium and backfill in lifts to top of topmost frame unit.  Finish grade of growing medium to be 25mm below bottom of deck unit, except as indicated otherwise on Contract Drawings. 

3.4.10

Do not place final lift of backfill until adjacent deck unit is secured in place.  Then install and compact backfill flush with soil cell deck. Ensure compaction equipment does not contact deck unit. Maintain modified frame unit in place until installation of deck unit.

3.5 Soil Cell Deck

3.5.1

Obtain the Contract Administrator’s approval of placement and compaction of growing medium and backfill prior to installation of soil cell deck.

3.5.2

Process for installation of deck units requires that deck units be installed immediately after removal of modified frame units.

3.5.3

Ensure contact points are free of dirt, mud and debris prior to placement.  Register deck unit on top of frame unit post.  Do not set deck unit half on one frame unit below and half on another frame unit.  Ensure deck unit is solidly seated on frame unit. 

3.5.4

Snap deck unit onto frame unit using snapping mechanism on corners of deck unit.  A rubber mallet may be used to hammer snaps into place.

3.5.5

Secure deck unit corners to frame unit posts using screws provided by manufacturer.

3.6 Geotextile

3.6.1

Place geotextile over top of soil cell deck and where indicated on Drawings.  Extend geotextile minimum 450mm beyond outside edge of excavation.  Overlap geotextile joints minimum 450mm.  Cut geotextile to provide minimum 200mm overlap of tree, planting and utility openings.

3.7 Inspection Riser Assembly

3.7.1

Install inspection riser assembly on top of geotextile in location shown on Contract Drawings immediately prior to placement of granular base.  Maintain assembly in fixed position during placement of granular base and final hard surface treatment.

3.8 Geotextile

3.8.1

Supply and install geotextile under soil cell system as shown on Contract Drawings and per Section –31 32 19 - Geosynthetics.

3.8.2

Supply and install geotextile on soil cell deck as shown on Contract Drawings and per Section 31 32 19 - Geosynthetics.

3.8.3

Place geotextile over top of soil cell deck and where indicated on Drawings. 

3.8.4

Extend geotextile minimum 450mm beyond outside edge of excavation.  Overlap geotextile joints minimum 450mm.  Cut geotextile to provide minimum 200mm overlap of tree, planting and utility openings.

3.8.5

Repair cut or damaged geotextile with a second piece of geotextile prior to placement of granular base.  Overlap edges of cut or damaged area with second piece by a minimum of 300mm.

3.9 Granular Base

3.9.1

Supply and install granular sub-base course under soil cell system as shown on Contract Drawings and as specified in Section 32 11 23 - Granular Base.

3.9.2

Supply and install aggregate base course above soil cell system as shown on Contract Drawings and as specified in Section 32 11 23 - Granular Base.

3.9.3

Maximum tolerance for deviations in finished surface of granular base for soil cell system is 6mm over a 1200mm distance.   Adjust granular base under each frame unit to provide a continuous solid base of support to required grade elevation.

3.9.4

Install granular base course on geotextile immediately after installation of geotextile.

3.9.5

Place granular base on soil cell system from one side of soil cell deck to other, to ensure geotextile and granular base conforms to cell deck contours. 

3.9.6

Do not place or spread granular base in several positions at same time.

3.9.7

Load granular base onto soil cell system from equipment located outside limits of soil cell excavated area.  Do not drive vehicles or operate equipment directly on top of soil cell deck, geotextile or granular base.  Do not drive vehicles or operate equipment greater than 450kg directly on granular base over soil cell deck.

3.9.8

Spread granular base on soil cell system using hand tools or by light use of equipment bucket. 

3.9.9

Compact granular base in Iifts not to exceed 150mm, to 95% of maximum dry density.  Compact granular base on top of soil cell system using walk behind type vibratory plate tamper, vibratory roller or jumping compacter having a maximum weight of 450kg.

3.9.10

For alternate method of placing and compacting granular base on top of soil cell system (e.g. for large area, small area, area of difficult access) submit shop drawing of proposed equipment and procedure to Contract Administration for approval.

3.10 Protection of Work

3.10.1

Protect soil cell system, geotextile and granular base from vehicles, equipment, other materials and excessive moisture. 

3.10.2

Use temporary fencing or hoarding to keep vehicles and equipment away off soil cell area until final surface materials are placed. 

3.11 Clean Up

3.11.1

Dispose of surplus materials and all construction debris off site. 

1.0 General

1.0.1

Section 32 94 01S refers to those portions of the work that are unique to the complete or partial installation or repair of an automatic underground irrigation system, including all necessary preparatory work and all electrical, wiring and plumbing connections, and maintenance work during the guarantee period.

1.0.2

This section applies to General Contractors and Sub-Contractors for all services and sites that will be maintained by City of Kelowna staff.  This section must be referenced and interpreted simultaneously with all other MMCD (Master Municipal Construction Document) sections pertinent to the works described herein.  Where standards in this document exceed those in MMCD, these standards shall take precedence.

1.1 Related Work

1.1.1

Project Record Documents    Section 01 33 01

1.1.2

Cast-in-Place Concrete    Section 03 30 53

1.1.3

Precast Concrete    Section 03 40 01

1.1.4

Aggregates and Granular Materials    Section 31 05 17

1.1.5

Site Grading    Section 31 22 01

1.1.6

Excavating, Trenching and Backfilling    Section 31 23 01

1.1. 7

Topsoil and Finish Grading    Section 32 91 21

1.1.8

Hydraulic Seeding    Section 32 92 19

1.1.9

Seeding    Section 32 92 20

1.1.10

Sodding    Section 32 92 23

1.1.11

Planting of Trees, Shrubs  and Ground Covers    Section 32 93 01

1.1.12

Waterworks    Section 33 11 01

1.2 References

1.2.1

Abbreviations referenced within this document with respect to testing, materials, fabrication and supply are fully described in References - Section 01 42 00.

1.2.2

Installation of irrigation components near trees must meet City of Kelowna tree protection Bylaws 8041 and 8042.

1.3 Codes and Permits

1.3.1

Perform all work of this section in strict accordance with all municipal, provincial, or federal guidelines, regulations, and codes.  Requirements of these specifications not conflicting therewith, exceeding code requirements govern.

1.3.2

Contractor is responsible for obtaining all necessary permits and approvals required to undertake and complete the work.

1.4 Quality Assurance

1.4.1

Provide documentation in writing of minimum of 5 years of industry experience and a member in good standing of at least one of the following organizations:

1. Irrigation Industry Association of British Columbia (IIABC)
2. The Irrigation Association (IA)

1.4.2

If the irrigation design involves High Density Polyethylene (HPDE) pipe, all welds required during project construction must be done by an HDPE installer who holds a current training certificate from a recognized HDPE training organization to weld and install HDPE pipe. Provide documentation to the Contract Administrator.

1.4.3

All electrical components or products specified or used in construction of the proposed irrigation system must be CSA approved and installed in accordance with the most recent versions of the Safety Standards Act and Electrical Safety Regulation.

1.4.4

Install all irrigation components per manufacturer’s instructions and specifications.

1.4.5

All materials to be new and without flaws.

1.4.6

Attend a mandatory pre-construction meeting with City of Kelowna Parks Department Representative.

1.5 Definitions

1.5.1

Journeyman Plumber is an individual who: (i) holds a Certificate of Qualifications; (ii) follows the BC Plumbing Code; (iii) is governed by the local plumbing authority; (iv) and is responsible for all required permits and inspections.

1.5.2

Certified Electrician is an individual who: (i) holds a Certificate of Qualifications; (ii) follows the BC and Canadian Electrical Code; (iii) is governed by Technical Safety BC; (iv) and is responsible for all required permits and inspections.

1.5.3

Contract Administrator is a person or company appointed by the City of Kelowna and identified in writing to the Contractor to be the City of Kelowna’s representative for the purposes referenced herein.

1.5.4

City of Kelowna Parks Department Representative is a person designated by the City of Kelowna Parks Department to represent the City of Kelowna Parks Department at project meetings, tests and inspections.

1.5.5

Owner means the City of Kelowna. Where project action or involvement are required, the Owner’s representative will be the City of Kelowna Parks Department Representative.

1.6 Scheduling

1.6.1

Ensure that sequencing of irrigation work is carried out in coordination with the work of other trades and that sleeving, conduit, wire, pipes, valves and other equipment are installed to minimize disruptions.

1.6.2

Plan, schedule and execute work to ensure water is available for landscape establishment and maintenance purposes at the appropriate time, volume, and operating pressures to ensure  irrigation is delivered in accordance with plant water needs.

1.7 Substitutions

1.7.1

Where materials are specified by brand name, model number, and/or size, such specifications facilitate a description of the materials and material quality and establish a standard for performance and quality against which proposed substitutes will be evaluated.

1.7.2

Proposed substitutes will match specified materials in quality, performance, flow parameters and pressure loss so as to not compromise the intent of the design or overall performance of the irrigation system.

1.7.3

Proposed substitutes and Shop Drawings; as necessary per the requirements set out below; will be submitted to the Contract Administrator and the Contract Administrator will obtain approval from the City of Kelowna Parks Department Representative.

1.7.4

Proposed substitutions must be submitted to the Contract Administrator at least 10 days before the Tender Closing Date for consideration as an approved equal during the tender period.

1.7.5

Substitution requests by Contractor will have no impact on the Milestone Dates.

1.7.6

Purchase or installation of materials that are not specified will not be paid for unless:

(1) The materials have been reviewed and approved by Contract Administrator and the City of Kelowna Parks Representative as an Approved Equal as per Section 7.0, Instructions to Tenderers, or

(2) The materials have been reviewed and approved by Contract Administrator and the City of Kelowna Parks Representative as a Change Order, per Section 7.3 of the General Conditions.

1.7.7

Installation of materials that are not specified or are not an Approved Equal will be removed and replaced with the specified material at Contractor’s expense.

1.7.8

Where a revision is required to the irrigation system design that will markedly alter the original design, Shop Drawing(s) must be submitted to the Contract Administrator.

1.7.9

After contract award, proposed substitutions must be submitted to the Contract Administrator within 5 days of Notice to Proceed.

1.8 Irrigation Record Drawings

1.8.1

Further to Schedule 3, maintain accurate scaled records of installed irrigation system and its components on a marked-up set of Contract Drawings on a daily basis during construction.  Show all deviations from Contract Drawings.  Make marked-up Contract Drawings available to the Contract Administrator and/or designated site inspector upon request.

1.8.2

Prepare Record Drawings showing the as-installed location of all irrigation system components including but not limited to, sprinklers, valves, grounding point(s), points of connection, controllers, wire splice boxes, valve boxes, vaults, mainlines, lateral lines, irrigation sleeves.  Identify each zone numerically, complete with precipitation rate and US gpm per zone. 

1.8.3

Provide Record Drawings in digital AutoCAD (2020 or newer) and Adobe pdf hard copy sized Per project requirements and one laminated drawing in Arch B or Ansi B.

1.9 Operating Manual

1.9.1

Provide one digital copy of the Operating Manual for irrigation system.  Content of Operating Manual to include:

1. Copies of plumbing permit, electrical permit, HDPE certification.
2. Electrical Inspection Request Form and final approval.
3. Copies of irrigation inspection reports and test results signed by the individual who presided over the inspection or test.
4. Product warranty statement for controllers, meters, backflow prevention assemblies, valves, filters, sensors, electronic components, and related irrigation components.  Date warranty with date of issuance of the Certificate of Substantial Performance.
5. Written guarantee for work completed, for a minimum of 1 year to commence from the issuance of the Certificate of Substantial Performance.

1.10 Submittals

1.10.1

Submit complete set of Record Drawings to Contract Administrator prior to issuance of Certificate of Substantial Performance. 

1.10.2

Submit complete digital copy of Operating Manual to the Contract Administrator and City of Kelowna Parks Representative prior to issuance of Certificate of Substantial Performance.

1.11 Measurement for Payment

1.11.1

Point of Connection: Unless otherwise specified in the Schedule of Quantities and Prices, payment for supply and installation of irrigation point of connection will be measured as a lump sum.  The work includes:

1. Permits & fees.
2. Supply, installation and testing of the connection to the water service line and booster pump.
3. Water meter.
4. Backflow prevention assembly.
5. Hydrometer.
6. Blowout assemblies.
7. Pressure regulating valve.
8. Filters.
9. Fittings.
10. Vaults, valve boxes & lids.
11. Excavation, trenching, conduits, backfill and restoration.
12. Inspections and testing.
13. All incidentals necessary for the proper installation and operation of a complete irrigation point of connection including water supply to the irrigation point of connection and irrigation system.

1.11.2

Electrical Service: Unless otherwise specified in the Schedule of Quantities and Unit Prices, payment for supply and installation of electrical service will be measured as a lump sum.   The work includes:

1. Permits & fees.
2. Supply, installation and testing of the connection to the electrical source.
3. Electrical meter.
4. Excavation, trenching, conduits, backfill and restoration.
5. Inspections and testing.
6. All incidentals necessary for the proper installation and operation of a complete electrical service to the irrigation system.

1.11.3

Control System: Unless otherwise specified in the Schedule of Quantities and Unit Prices, payment for supply and installation of control system will be as a lump sum.  The work includes:

1. Permits & fees.
2. Supply, installation, testing, programming, and adjustment of irrigation system controller(s).
3. Transmitters, decoders & communication cartridges
4. Electrical conduits.
5. Controller kiosk(s).
6. Vaults, splice boxes & lids.
7. Fittings.
8. Excavation, trenching, backfill, and restoration.
9. Inspections and testing.
10. All incidentals necessary for the proper installation and operation of a complete irrigation control system.

1.11.4

Pipes, valves, sprinklers and micro irrigation: Unless otherwise specified in the Schedule of Quantities and Unit Prices, payment for supply and installation of pipes, valves and sprinklers and micro irrigation components will be measured as a lump sum.  The work includes but is not limited to:

1. Supply, installation, testing and adjustment of irrigation pipe.
2. Supply, installation, testing and adjustment of irrigation dripline.
3. Sleeves and conduit.
4. Zone control valves.
5. Control wire, common wire, flow sensor wire and spare wires.
6. Drain valves.
7. Isolation valves.
8. Air/vacuum relief valves.
9. Pressure regulators.
10. Swing joint assemblies.
11. Sprinklers.
12. Root watering systems.
13. Emitters and bubblers.
14. Fittings
15. Valve boxes & lids.
16. Excavation, trenching, backfill and restoration.
17. Inspections and testing.
18. All incidentals necessary for the proper installation and operation of a complete irrigation system.

1.11.5

Post Construction Submittals: Unless otherwise specified in the Schedule of Quantities and Unit Prices, payment for Record Drawings and Operating Manual will be measured as a lump sum.

1.12 Tests and Inspections

1.12.1

Refer to General Conditions, Clause 4.12, Tests and Inspections.

1.12.2

During construction, inspection and testing of components will be required to ensure performance of irrigation system meets expected standards.  

1.12.3

Provide equipment and personnel necessary for performance of inspections and tests.

1.12.4

As a condition of issuance of Certificate of Substantial Performance confirm in writing to the City of Kelowna Parks Department Representative, at least one week prior to application for Substantial Performance, that the following inspections and tests have been successfully completed:

1. Layout Inspection
2. Vault drainage test
3. Irrigation Point of Connection Inspection
4. Backflow Prevention Assembly Test per BCWWA (British Columbia Water Works Association)
5. Mainline pressure test
6. Open trench inspection
7. HDPE pipe strap test
8. Two-wire System Grounding Inspection
9. System coverage test
10. System operation test
11. Dripline/emitter test
12. Substantial Performance inspection

1.12.5

Total Performance inspection will be completed after Substantial Performance inspection.

1.12.6

Conduct all inspections and tests in the presence of Contract Administrator. Provide minimum 3 days (72 hours) notice to the Contract Administrator to attend all inspections and tests. Contract Administrator must invite City of Kelowna Parks Department Representative to all tests within 24 hours of receiving the invitation from the Contractor.

1.12.7

The Contract Administrator will ensure that results of that test or inspection are provided to the City of Kelowna Parks Representative within 48 hours of completion.

1.13 Layout Inspection

1.13.1

Conduct Layout Inspection prior to commencement of irrigation system installation. project construction.

1.13.2

Coordinate location of irrigation components with landscaping, building and physical features of site. 

1.13.3

Layout and stake irrigation system per Drawings to confirm:

1. Layout is within project boundary and property lines.
2. Minimum horizontal and vertical clearances from electrical and other utilities are met.
3. Location of all sleeving, supply piping, kiosks, vaults, valve boxes, sprinkler heads and splice boxes and other irrigation components match Contract Drawings.

1.14 Vault Drainage Test

1.14.1

Plug drain hole, fill point of connection vault with water to a depth of 300mm and leave water to drain.

1.14.2

Test is passed if water drains in 1 hour or less.

1.14.3

If test is failed, Contractor to rectify drainage issues and organize secondary inspection.

1.14.4

Supply photo of drain pit installation to Contract Administrator.

1.15 Point of Connection Inspection

1.15.1

Verify installed components are per Approved Products List and in accordance with Drawings.

1.16 Backflow Prevention Device Test

1.16.1

Backflow Prevention Test will be conducted prior to commencement of irrigation system operation..

1.17 Mainline Pressure Test

1.17.1

Mainline Pressure Test to be conducted as follows:

1. Allow minimum 48 hours from the last glue joint or fusion weld for sections that will be tested.
2. Install pressure gauge on the second blowout assembly in the Point of Connection vault.
3. Fill mainline with water until all air is expelled from mainline and system has been charged to operating pressure.
4. Maintain water in pipe for 4 hours.
5. Record initial pressure reading. Record and report any variance greater than 5% from beginning to end of test.

1.17.2

Test results are based on the difference in recorded pressures at beginning and end of test. Passed test is 5% or less drop in pressure from beginning pressure reading to ending pressure reading.

1.17.3

If test is failed, identify source of leak and replace any and all defective materials and workmanship as necessary to eliminate leak.

1.17.4

Repeat mainline pressure test and make replacements as necessary until a passed result is achieved.

1.18 Open Trench Inspections

1.18.1

Open Trench Inspection(s) will be conducted throughout construction schedule.

1.18.2

Contractor to ensure that a minimum of 50% of mainline and 50% lateral pipelines inspected prior to burial. 

1.18.3

Inspections are to determine if pipe layout, pipe depth, joining procedures, wiring, bedding material and caution tape placement are in accordance with Drawings.

1.18.4

Contractor to rectify any issues which limit successful completion of inspection and organize secondary inspection if necessary.

1.19 HDPE Weld Inspections and Testing

1.19.1

HDPE Weld Inspections are to be conducted a minimum of three times during project installation.  HDPE welds must meet requirements per ASTM F2620.

1.19.2

Conduct minimum of one HPDE weld strap test prior to installing pipe within trench.

1.19.3

Ensure HDPE welding equipment  meets requirements per Plastic Pipe Institute Technical Report TR-33 and ASTM F2620.

1.19.4

If a visual or tactile inspection indicates a substandard weld, a strap test of said weld will be required.

1.19.5

Pipe strap test protocol is as follows:

1. Conduct visual or tactile inspection of several welds. Where bead does not roll back correctly and/or is not consistent in height or width, the Contractor will perform the strap test.
2. At the welded join selected, Contractor to cut fusion weld from pipe, allowing 8” (200mm) on either side of the weld to work with.
3. Cut pipe lengthways through fusion weld to create a strap 1” (25mm) wide.
4. Bend strap back on itself.  If weld breaks repeat test on another fusion weld, chosen by Contract Administrator.  If second weld fails the Contractor Administrator may request that all welds be investigated at the expense of the Contractor.
5. If fusion weld does not break then weld is acceptable and no further pipe strap testing is required.

1.20 Two-Wire System Grounding Inspection

1.20.1

Two-wire System Grounding inspection to be conducted as per installed two-wire system manufacturer’s requirements.

1.21 System Coverage Test

1.21.1

System Coverage Test will be conducted as part of the Substantial Performance Inspection, after installation and operation of complete irrigation system and prior to issuance of Certificate of Substantial Performance.

1.21.2

Conduct visual inspection to confirm that:

1. Head spacing does not exceed that shown on Drawings.
2. Heads, valve boxes, vaults and trenches are flush with finished grade.
3. Heads and valves have been installed as per the Drawings.

1.21.3

Conduct operational tests to verify that:

1. Performance provides head-to-head coverage or meets approved design parameters.
2. Minimal overspray occurs onto different zones, hard surfaces or other improvements and/or the spray patterns meet approved design parameters.

1.22 System Operation Test

1.22.1

System Operation Test will be conducted as part of the Substantial Performance inspection, after installation and operation of complete irrigation system and prior to issuance of Certificate of Substantial Performance.

1.22.2

Conduct operational tests to verify that:

1. Controller can be programmed manually on site and remotely via Owner’s central irrigation control system.
2. Each zone can be operated automatically and in succession via programmed controller.
3. Operating pressure is within design parameters.
4. Hydrometer readings at controller are within +/-5% accuracy of design flows for all zones.
5. Controller flow readings are within +/-5% of the hydrometer flow readings for all zones.

1.23 Dripline/Emitter Test

1.23.1

Dripline/emitter Test will be conducted while all dripline and/or emitter zones are exposed.

1.23.2

Perform inspection and testing of dripline/emitter manifold and lines to identify potential leaks and confirm manifold, driplines and emitters are able to operate at design pressure.  Conduct inspection and testing prior to backfilling of manifold, driplines or emitter supply lines.

1.23.3

Verify that dripline / emitter layouts are in accordance with Drawings.

1.23.4

Charge and maintain manifold and lines with water at operating pressure.  While charged, visually inspect manifold, driplines and fittings for leaks and replace any and all defective materials and workmanship as necessary to eliminate leak.

1.23.5

Repeat inspection and testing and make replacements as necessary until further leaks are identified.

1.24 Substantial Performance inspection

1.24.1

Substantial Performance inspection is to verify that the installation has reached a point where the Certificate of Substantial Performance can be awarded, and that the installation has met the requirements of these specifications.

1.24.2

Substantial Performance Inspection will include 1.21 System Coverage Test and 1.22 System Operation Test.

1.24.3

Inspection of all plant material to ensure that impacted existing plant material and new material are healthy and in satisfactory growing condition.

1.25 Total Performance Inspection

1.25.1

Total Performance inspection is to verify that any outstanding deficiencies identified during the testing and inspection processes set out within these specifications, have been rectified.

2.0 Products

2.1 Water Service and Meter

2.1.1

Unless already installed or otherwise required by the water utility having jurisdiction over the site provide a metered water service, including but not limited to:

1. Plumbing permit.
2. Establishment and verification of water account with appropriate utility provider.
3. Supply and installation of water meter and backflow prevention assembly; installed in accordance with requirements of the water utility.

2.1.2

Type and size of water meter to be as specified  by the water utility having jurisdiction over the site.

2.2 Electrical Service and Meter

2.2.1

Unless already installed or otherwise required by the electrical utility having jurisdiction over the site provide a metered electrical service, including but not limited to:

1. Electrical permit.
2. Electric meter.
3. Establishment and verification of electrical account with appropriate utility provider.

2.2.2

Type and size of electrical service to be as specified on Contract Drawings.

2.2.3

Electric meter to be supplied and installed per standards and specifications of electrical utility.

2.3 Isolation Valve

2.3.1

Per Approved Products List.

2.4 Air Relief Valve

2.4.1

Per Approved Products List.

2.5 Hydrometer

2.5.1

Per Approved Products List.

2.6 Hydrometer Air Relief Vent

2.6.1

Per Approved Products List.

2.7 Hydrometer Communication Cable

2.7.1

Per Approved Products List.

2.8 Pressure Reducing Valve

2.8.1

Per Approved Products List.

2.9 Backflow Prevention Device

2.9.1

Per Approved Products List.

2.9.2

Reduced Pressure Backflow Assembly (RPBA) as per approved design.

2.10 Vault and Lid

2.10.1

Vault and matching lid as per Approved Products List.

2.10.2

Lid must have recessed hinges and locking hardware.

2.11 Ground Assembly

2.11.1

Ground assembly to consist of CSA and BC Electrical Code endorsed products per irrigation controller manufacturer’s recommendations for grounding.

2.12 Irrigation Controller

2.12.1

As specified on Contract Drawings.

2.13 Decoder

2.13.1

As specified on Contract Drawings.

2.14 Controller Kiosk and Base

2.14.1

Per Approved Products List.

2.15 Electric Control Valve

2.15.1

Per Approved Products List.

2.16 Electric Control Valve; Low Flow

2.16.1

Per Approved Products List.

2.17 Filter

2.17.1

Per Approved Products List.

2.18 Quick Coupler Valve

2.18.1

Per Approved Products List.

2.19 Swing Joint Assembly

2.19.1

Fabricated with three threaded Schedule 40 PVC street elbows and one threaded Schedule 80 PVC nipple.

2.19.2

Length of nipple to be sufficient to permit installed head or valve to be set as per Drawings.

2.19.3

Diameter of nipple to match inlet for valve or head shown on Drawings.

2.20 Lateral Flush Assembly

2.20.1

Per City of Kelowna Detail Drawing.

2.21 Valve Box

2.21.1

Per Approved Products List.

2.21.2

Valve box and overlapping matching lid and extensions will be commercial grade and green in colour.

2.22 Control Wire

2.22.1

Conventional system: Control wire from irrigation controller to electric control valve to be minimum #14 gauge, direct burial, type TWU-40 wire.  Control wire to be any colour other than white, blue or red.

2.22.2

Conventional system: Common wire from irrigation controller to electric control valve to be minimum #12 gauge direct burial, type TWU-40 wire.  Common wire to be white in colour.

2.22.3

Conventional system: Hydrometer wire from the controller to the hydrometer solenoid to be minimum #14 gauge direct burial, type TWU-40 wire.  Wire to be red in colour.

2.22.4

Conventional system: Spare control wire to be blue in colour.

2.22.5

Conventional system: Spare common wire to be white in colour.

2.22.6

Decoder system: Two-wire (dual conductor) control wiring to match controller brand.

2.22.7

Wire connectors to be new, two-step, CSA approved for watertight applications and assembled according to the manufacturer’s recommendations.

2.23 Wire Spice Box

2.23.1

Wire splice box as per Approved Products List.

2.24 Irrigation Sleeve

2.24.1

Schedule 40 PVC pipe for irrigation sleeves under hard surfaces.

2.24.2

Irrigation sleeve diameter to be minimum 4” (100mm) or twice the diameter of the pipe running through it; whichever is greater.

2.24.3

System wire conduit to be a minimum 2” (50mm) diameter electrical conduit.

2.25 Polyvinyl Chloride (PVC) Pipe

2.25.1

Must conform to CSA B137.3-93.

2.25.2

Must be new and without flaws, extruded from virgin, high impact materials, solvent weldable with belled ends, continually and permanently marked showing manufacturer’s name, material, size, pressure rating, and CSA approval.

2.25.3

Pipe series and size as specified on Contract Drawings.

2.26 Polyethylene (PE) Pipe

2.26.1

Must be new and without flaws, CSA Series 100, MDPE (Medium Density Polyethylene), extruded from virgin materials, continually and permanently marked showing manufacturers name, material, size, and pressure rating.

2.26.2

Pipe series and size as specified on Contract Drawings.

2.27 High Density Polyethylene (HDPE) Pipe

2.27.1

Must be new and without flaws, CSA approved, continually and permanently marked showing manufacturers name, material, size, and pressure rating.

2.27.2

Acceptable HDPE pipe is dependent on operating pressure and to have minimum Standard Dimension Ratios (SDR) as follows:

(1) Maximum pressure 160 psi:         DR11

(2) Maximum pressure 200 psi:         DR9

2.28 PVC and PE Fittings

2.28.1

Must be new and without flaws.

2.28.2

Fittings for PVC pipe systems must be PVC in composition and intended for use with PVC pipe for either solvent welding applications or threaded connections.

2.28.3

Threaded nipples are to be Schedule 80 PVC.

2.28.4

Where pipe changes from metal to PVC pipe, the metal end of the pipe must be a female adapter and the PVC fitting must be a Schedule 80 nipple.

2.28.5

Fittings for PE pipe must meet ASTM D2609 standards, complete with stainless steel gear clamps.

2.29 HDPE Fittings

2.29.1

Must be new and without flaws.

2.29.2

Must be UL or ULC approved.

2.29.3

Butt fusion fittings for use on HDPE must meet ASTM F2206 Standard Specification and be designed for butt fusion welding to HDPE pipe.

2.29.4

Electrofusion type fittings for use on HDPE must meet ASTM F1055 Standard Specification and be designed for electrofusion welding to HDPE pipe.

2.29.5

SDR rating of HDPE fittings must match the SDR rating of the HDPE pipe specified.

2.29.6

HDPE pipe fittings to be moulded or fabricated by a pipe manufacturer.  HDPE pipe fittings and flange adapters made by contractors, sub-contractors or distributors are prohibited.

2.29.7

Use of mechanical fittings on HDPE is prohibited unless approved in writing by City of Kelowna Parks Representative.

2.30 Pipe Solvent Cement and Primer

2.30.1

Per Approved Products List.

2.31 Vault Pipe and Fittings

2.31.1

Vault pipe and fittings shall be brass, stainless steel or HDPE.

2.31.2

Brass piping must be in new condition and conform to NSF/ANSI 372.

2.31.3

Stainless steel piping must be in new condition, must be Type 304L or 316L and must conform to ASTM A312.

2.31.4

Selected material for pipe and fittings must be consistent throughout vault.

2.31.5

All pipe and fittings must meet BC Plumbing Code requirements for use with potable water.

2.32 Thrust Block

2.32.1

Thrust blocks shall adhere to MMCD Section 33 11 01 Item 3.13 and MMCD Standard Detail Drawing W1.

2.33 Sprayhead Sprinkler

2.33.1

Per Approved Products List.

2.34 Rotary Sprinkler

2.34.1

Per Approved Products List.

2.35 Dripline

2.35.1

Per Approved Products List.

2.36 Drip Emitter /Bubbler

2.36.1

As specified on Contract Drawings.

2.37 Root Watering Systems

2.37.1

Per Approved Product List.

2.38 Bedding and Backfill Sand

2.38.1

Pit run sand, 2mm or less, per MMCD Section 31 05 17.

2.39 Drain Rock

2.39.1

Drain rock per MMCD Section 31 05 17.

2.40 Bolts

2.40.1

All bolts used in system construction  to be stainless steel 304 or 316.

3.0 EXECUTION

3.1 Existing Conditions

3.1.1

Report existing conditions at variance with Contract Drawings to Contract Administrator. Contract Administrator to report information to City of Kelowna Parks Representative.

3.1.2

Verify locations of underground utilities prior to commencing excavation and conduct work so to prevent interruption and damage to services and utilities.  Make good all damages to same at Contractor’s cost.

3.1.3

Verify location of all services in building walls before boring or drilling holes.  Make good all damages to same at Contractor’s cost.

3.1.4

Protect existing conditions and completed work from disturbance during Work.  Make good all damages to same at Contractor’s cost.

3.1.5

Proposed adjustments to installation of irrigation system to avoid existing conditions, completed work and utilities will be permitted subject to prior approval by the Contract Administrator.

3.2 Excavation

3.2.1

Excavate to ensure depth and bedding requirements are met. 

3.2.2

All excavation is unclassified.  Report any material or site condition that cannot be excavated by normal mechanical or manual means or that may affect excavation to required depth to the Contract Administrator.

3.2.3

Identify and recycle all suitable materials recovered during construction.

3.2.4

Remove and dispose of buried debris exposed during excavation, including decommissioned irrigation materials and underground utility components.

3.3 Water Service

3.3.1

Verify that the provided wate service meets irrigation design requirements as indicated on the irrigation design.

3.3.2

Notify Contract Administrator if the water service provided does not meet design requirements as indicated on the irrigation design and await notice to proceed or other instructions.

3.3.3

Ensure connection to supplied water service meets City of Kelowna Subdivision Bylaw, MCCD Platinum Edition, applicable American Water Works Association standards and BC Plumbing Code.

3.4 Electrical Service and Account

3.4.1

Within 5 Days of receipt of Notice to Proceed provide Contract Administrator with information necessary for Owner to make application to electrical utility for service connection.

3.4.2

Certified electrician or FSR to obtain permits and approvals necessary to install and operate irrigation system. 

3.4.3

Coordinate with electrical utility to confirm the availability, suitability, and location of an acceptable service connection.

3.4.4

Install all electrical connections in accordance with local, provincial and national electrical codes.

3.4.5

Ensure grounding is included on electrical permit.

3.5 Water Meter

3.5.1

Install water meter per approved Drawings and requirements of water utility.

3.5.2

Where a water meter is not being installed at the time of construction, install spacers and unions sufficient to allow for the future installation of a correctly sized water meter.

3.6 Isolation Valve

3.6.1

Install isolation valve per Contract Drawings. 

3.7 Hydrometer

3.7.1

Install Hydrometer in location specified on Contract Drawings.

3.7.2

Follow manufacturer’s instructions for installation.

Air relief valve is to be installed on the first blowout, threaded into the ball valve or gate valve depending on size of the vault. It is to be used during start-up, once system is charged ball or gate valve can be closed with air relief vent attached. Remove during winterization process.

3.7.3

Install hydrometer drain valve prior to installation.  Hydrometer drain valve to be supplied by City of Kelowna Parks Department.

3.7.4

Where system utilizes a conventional wiring layout, communication wire to be PE39 cable; no substitutions permitted. No splices are permitted on the wire path from controller to hydrometer.

3.7.5

Where system utilizes two-wire technology, communication from controller to hydrometer to be as per manufacturer’s specifications.

3.8 Pressure Reducing Valve

3.8.1

Prior to installation, confirm in writing from the City of Kelowna, if a Pressure Reducing Valve (PRV) is required to be installed in the Point of Connection to stabilize pressure/flow.

3.8.2

Install PRV per manufacturer’s instructions in location shown on Drawings and as required to maintain operating pressure within manufacturer’s recommended range.

3.8.3

Adjust PRV to provide water at design pressure.

3.9 Backflow Prevention Device

3.9.1

All backflow prevention assemblies must be installed by Journeyman Plumber carrying required cross connection certification and in accordance with BC Plumbing Code.

3.9.2

Double Check Valve Assembly (DCVA) to be installed within lockable vault.

3.9.3

Reduced Pressure Backflow Assembly installation will require drawing approval by the Building and Permitting Department of the water purveyor in the jurisdiction of installation.

3.9.4

Install backflow prevention assemblies with positive drainage and room for maintenance and servicing.

3.10 Irrigation Vault and Lid

3.10.1

Install vault(s) in location shown on Contract Drawings.

3.10 2

Support and brace point of connection components, piping and valves within vaults using adjustable aluminium pipe stands complete as per Approved Products List in the quantities indicated  below:

1. 1” to 4” (25-100mm)    3 supports
2. Larger than 4” (100mm)    as per Drawings

3.10.3

Install irrigation vault drain and connect to drain pit, dry well, manhole or catch basin.

3.10.4

Drainage pit dimensions will match the depth, width and length of the vault installed.

3.10.5

Extend selected piping for POC outside the vault a minimum of 300mm.

3.10.6

Ensure no vault is installed within 200mm of any hardscape.

3.11 Ground Assembly

3.11.1

To meet BC Electrical Code requirements.

3.12 Irrigation Controller

3.12.1

Install approved irrigation controller in approved irrigation kiosk.

3.12.2

Install approved irrigation controller to allow controller door to open sufficiently for full access to control components.

3.12.3

Install approved irrigation controller wiring in accordance with local, provincial and national electrical codes.

3.12.4

Where applicable, install and test the ground assembly using a “Megger” to ensure earth resistance to ground does not exceed controller manufacturer’s recommendations.

3.12.5

Install communication components per manufacturer’s instructions. Establish communication between controller and Owner’s central irrigation control system, including relays as specified by designer.

3.12.6

Operate Controller through 1 year warranty period for plant establishment.  Include 1 year warranty period irrigation schedule in Operating Manual.

3.13 Irrigation Kiosk, Antenna and Kiosk Base

3.13.1

Install Irrigation Kiosk (Kiosk), Antenna and Kiosk Base per Contract Drawings.

3.13.2

Provide electrical service to Kiosk as shown on Contract Drawings.

3.13.3

Where dedicated electrical meter is required, install electric meter in the Kiosk per electrical utility’s requirement.

3.13.4

Install one duplex 120v GFI receptacle, on dedicated breaker, in Kiosk.

3.14 Electric Control Valve

3.14.1

Install in valve box per Contract Drawings.

3.14.2

Identify Electric Control Valve with permanent label or tag indicating zone number of valve.

3.15 Filters

3.15.1

Install as per Contract Drawings.

3.16 Quick Coupler Valve

3.16.1

Install as shown on Contract Drawings.

3.16.2

Do not install Quick Coupler Valves in same valve box as electric control valve.

3.17 Swing Joint Assembly

3.17.1

Fabricate assembly of triple swing joint using three threaded Schedule 40 PVC elbows and one threaded Schedule 80 PVC nipple.

3.17.2

Install swing joint assembly to rotate clockwise when depressed.

3.17.3

Tape threads of PVC fittings with Teflon tape and make hard hand tight.

3.18 Lateral Flush Assembly

3.18.1

Install Lateral Flush Assembly on swing joint assembly in valve box per Contract Drawings.

3.18.2

Coil hose in valve box.

3.19 Valve Box

3.19.1

Install all manual and electric control valves, control zone kits and quick coupler valves in valve boxes or concrete vault as shown on Contract Drawings.

3.19.2

Do not install valve boxes in hardscapes.

3.19.3

Install valve box flush with finish grade and arrange in a neat and orderly manner. 

3.19.4

Valve box must not contact irrigation pipe.  Use matching valve box extensions as required.

3.19.5

Up to three 1” (25mm) control valves or two 1½” (38mm) control valves may be contained within a single valve box provided there is 4” (100mm) of clearance between valves.  Install valve 2” (50mm) and larger in their own valve box.

3.20 Control Wire

3.20.1

Install control wire per code and by qualified personnel employed by the company holding the electrical permit. 

3.20.2

Bury control wire per applicable code.

3.20.3

Bed control wire in sand with minimum 3” (75mm) sand around control wire.  Where control wire is in same trench as pipe, place wire beside pipe (not directly above) with horizontal clearance of a minimum of 3” (75mm) and in accordance with BC Electrical Code depth.

3.20.4

Bundle multiple lengths of wire in same trench or conduit with ties at maximum 10’ (3m) intervals.

3.20.5

Install wire with minimum 24” (600mm) length of coiled slack at all changes of direction, in wire splice boxes and at connections to controlled components.

3.20.6

Identify all control wires entering controller kiosk with permanent label or tag indicating zone number of valve operated by each control wire.

3.20.7

Maintain consistent wire colour through wire splice box.

3.20.8

Minimize wire splices.  Where wire splices are unavoidable make splice only in wire splice box using specified connector.

3.20.9

Identify spliced wire with permanent label or tag indicating zone number of spliced control wire.

3.20.10

Provide one spare control wire to for every five (5) electric valves shown on Contract Drawings.  Location of spare control wires as per Contract Drawings.

3.20.11

Provide 24” (600mm) length of coiled slack of each wire end in wire splice box.  Identify spare control wires as ‘spare’ wire with permanent label or tag.

3.20.12

Provide minimum two spare common wires.  Location of spare common wires as per Contract Drawings.

3.20.13

Where the system is a two-wire system, approved two-wire must be as specified by the manufacturer of the controller utilized and installed as per Contract Drawings.

3.21 Wire Splice Box

3.21.1

Locate wire splice box in planting bed where possible and locate for ease of access, maintenance, and testing.

3.21.2

Install wire splice box per Contract Drawings.

3.21.3

Do not install valves in wire splice box.

3.22 Irrigation Sleeve

3.22.1

Install irrigation sleeves in locations shown on Contract Drawings.

3.22.2

Install irrigation sleeve to depth as follows:

1. Mainline Piping
   1. 24” (600mm) below walkways
   2. 36” (915mm) below driveways, roads and plazas
2. Lateral Piping
   1. 18” (450mm) below walkways
   2. 36” (900mm) below driveways, roads and plazas

3.22.3

Install sleeve to extend 20” (0.5m) past edge of hard surface into soft landscape surface.

3.22.4

Cap sleeve with removable plug or cover.  Maintain plug in sleeve until such time as pipe or wire is ready to be installed.

3.22.5

Bed sleeve as follows:

1. Under walkways, 4” (100mm) of sand placed all around.
2. Under driveways, roads and plazas, compacted base aggregate all around per materials shown on Contract Drawings.

3.22.6

Bury ½” (12mm) width rebar piece beside each end of sleeve to enable location of sleeve end by metal detector after burial. Rebar piece to be positioned so that the top of the regard is 6” (150mm) below finished grade.

3.22.7

Record location of sleeve ends and label size of sleeve on Record Drawings.

3.23 Pipe and Fittings

3.23.1

Verify that all pipe, fittings, and connecting materials or equipment are compatible for proper installation.

3.23.2

Minimum and maximum burial depth and clearances for pipe and wire are as per Drawings and in keeping with applicable codes.

3.23.3

Nearest side of trench is not to be closer than 12” (300mm) from hard surface or feature.

3.23.4

Keep inside of pipe and outside of pipe ends clean at all times.  Cap or plug open pipe ends to keep out dirt and debris.

3.23.5

Follow manufacturer’s instructions and standards for installation of all pipe and fittings.

3.23.6

Follow manufacturer’s instructions and standards for installation of pipe and fittings; minimize excess runoff.

3.23.7

Allow sufficient space between fittings to facilitate future repairs. There shall a be minimum of two times pipe diameter or 2” (50mm) distance between fittings, whichever is greater.

3.23.8

Adhere to HDPE Certification standards and requirements for installation of HDPE pipe and fittings.

3.23.9

Flush irrigation pipe fully to remove accumulation of dirt and debris prior to installation of heads, dripline, emitters and filters.  Flush lateral lines to prevent clogging of screens, nozzles and emitters.

3.23.10

Follow manufacturer’s recommendations to allow for expansion and contraction of pipe in trench.

3.23.11

Set mainlines and laterals with 3” (75mm) sand on sides and bottom and 3” (75mm) sand above.

3.23.12

Ensure lateral lines are not installed directly above mainline.

3.23.13

For pipe in landscaped areas backfill trench to depths as per Detail Drawings and tamp in lifts to achieve compaction equal to the adjacent growing medium.

3.23.14

For pipe in native soil, sub-surface fill, rocky soils and aggregate base or sub-base material backfill remainder of trench with suitable non-sand material under 1” (25mm) in diameter and free of materials that could result in settling or damage to pipe or surface improvements.

3.23.15

Install thrust blocks at all changes in direction of PVC pipe 3” (75mm) in diameter or greater, and for any change in direction of gasketed pipe.

3.23.16

Cut pipe ends at right angle to pipe length.  Clean burrs prior to joining pipe and fittings.

3.23.17

Do not join pipe or fittings under wet or muddy conditions.

3.24 Thrust Block

3.24.1

Thrust block installation to adhere to MMCD Section 33 11 01 Item 3.13 and Standard Detail Drawing W1.

3.25 Sprinklers

3.25.1

Install per manufacturer’s recommendations and in location shown on Contract Drawings.

3.25.2

Location of heads as illustrated on Contract Drawings is intended as a guide to layout of heads.  Establish actual head locations in the field to ensure complete and adequate coverage of all areas to be irrigated and minimal overspray onto adjacent surfaces and improvements.  Do not exceed head spacing shown on Contract Drawings.

3.25.3

Where obstructions or site improvements hinder or block head to head coverage advise the Contract Administrator and determine best method to maximize coverage.

3.25.4

For head adjacent to hard surface or improvement set head 2” (50mm) from hardscape as shown on Contract Drawings.

3.25.5

For flat surfaces install head plumb to finished grade.  For sloped surfaces install head perpendicular to half the grade of the slope.

3.25.6

Mount pop-up heads on triple swing-joint assembly.  Connect bottom inlet of sprinkler to swing joint assembly. Side inlet connection not permitted.  Adjust swing joint assembly to set head flush with finish grade.

3.25.7

Adjust sprinklers to achieve head to head coverage of area to be irrigated, with minimum or no overspray onto other surfaces.

3.26 Dripline

3.26.1

Install per manufacturer’s recommendations in location shown on Contract Drawings.

3.26.2

Ensure approved filtration is installed.

3.26.3

Do not install driplines of different flow rates on the same zone.

3.26.4

Place dripline on prepared surface.  Surface to free of sharp rocks or other objects that may damage dripline.  Surface to be at grade necessary for dripline to be at specified depth after placement of remainder of topsoil or growing medium.

3.26.5

Placement of dripline by trenching using hand or mechanical methods permitted only if specified as such on Contract Drawings or upon written approval of the Contract Administrator. 

3.26.6

Do not drive or operate equipment over exposed dripline.

3.26.7

Thoroughly flush each zone after installation and before beginning regular operation of drip zone.

3.27 Drip Irrigation for Planting Beds

3.27.1

For dripline in planting bed stake dripline using manufacturer’s recommended stakes at 18” (450mm) on centre.

3.28 Drip Irrigation for Turf Areas

3.28.1

Install per manufacturer's instructions and as shown on Contract Drawings.

3.29 Emitter/Bubbler

3.29.1

Install per manufacturer’s recommendations and as shown on Contract Drawings.

3.29.2

Install approved filtration per manufacturer's instructions and as shown on Contract Drawings.

3.30 Root Watering System

3.30.1

Install as shown on Contract Drawings.

3.30.2

Root watering system to be installed equidistant, complete with sock and pea gravel.

3.31 Hose Bib

3.31.1

Install as shown on Contract Drawings

3.31.2

Do not install Hose Bibs in same valve box as electric control valve.

3.32 Clean-up and Restoration

3.32.1

Remove and properly dispose of all waste and debris resulting from irrigation installation from site.

3.32.2

Restore all disturbed surfaces to original condition and repair all trench settlement.

3.33 Instructions to Owner

3.33.1

Schedule on-site meeting to instruct City of Kelowna Parks Representative in complete operating and maintenance procedures for irrigation system, including start-up, winterization, and programming.

3.33.2

Review Record Drawings and Operating Manual with City of Kelowna Parks Representative on site.

3.34 Maintenance – General

3.34.1

Inspect, operate, maintain and adjust irrigation system through the one-year guarantee period for construction until issuance of Certificate of Acceptance to ensure it operates as intended, including but limited to:

1. Adjust irrigation program to ensure health and growth of the plant material and respond to changes in soil conditions and seasons for site.
2. Clean sprinkler heads and adjust coverage to eliminate over watering, under watering and overspray onto adjacent surfaces.
3. Monitor and clean filtration equipment.
4. Restore grass areas, planting beds, hard surfaces and improvements affected by trench settlement and erosion.
5. Respond to requests from the Contract Administrator for program adjustments, servicing, adjustments and repairs.
6. Provide digital documentation to the Contract Administrator of any repairs related to vandalism.

3.35 Maintenance – Winterization

3.35.1

During one-year guarantee period for construction, be responsible for winterization of irrigation system at end of growing season and prior to onset of air temperatures below 0º Celsius.  Be liable for any damage resulting from late or improper winterization.

3.35.2

Conduct winterization in the presence of the Contract Administrator.  Provide minimum 3 days (72 hours) notice to the Contract Administrator to attend.  Contract Administrator must invite City of Kelowna Parks Department Representative to winterization within 24 hours of receiving the invitation from the Contractor.

3.35.3

Winterization includes but is not limited to:

1. Saturation of soil with water to a depth of 300mm to provide deep watering of all lawn areas, planting beds and tree pits.
2. Deactivation of water supply.
3. Deactivation of controller.
4. Contact City of Kelowna Parks Department to determine if any components within the point of connection are to be removed prior to winterization and if there are specific guidelines to be followed for winterization of the point of connection.

3.36 Maintenance – Spring Start-up

3.36.1

During one-year guarantee period for construction be responsible for spring start-up of irrigation system at beginning of growing season or within 5 Days of request for start-up from Owner.  Be liable for any damage resulting from late or improper start-up.

3.36.2

Conduct spring start-up in the presence of the Contract Administrator.  Provide minimum 3 days (72 hours) notice to the Contract Administrator to attend.  Contract Administrator must invite City of Kelowna Parks Department Representative to Spring start-up within 24 hours of receiving the invitation from the Contractor.

3.36.3

Spring start-up includes but is not limited to:

1. Activate water supply slowly and provide location for air to escape prior to charging lines.
2. Checking and testing for leaks.
3. Cycling irrigation control program through all zones to ensure proper function and performance.
4. Checking and adjusting heads and emitters to achieve even coverage with minimum over spray onto other surfaces.
5. Testing of backflow prevention assembly. Submit test results to Contract Administrator and place test results tag on the backflow prevention assembly. Test tag must be firmly attached to the tested assembly and include the following information in waterproof ink: Name of Owner, Test Date, Tester initials, Tester Certification Number.
6. Saturation of the soil with water to a depth of 12” (300mm) to provide deep watering of all lawn areas, planting beds and tree pits.

3.37 Guarantee

3.37.1

Submit written guarantee, in approved form, stating that all work showing defects in materials, workmanship or operation will be repaired or replaced at no cost to Owner for a period of one year from date of Substantial Performance.

3.37.2

Guarantee includes the supply of labour, materials and equipment necessary for the repair and replacement of damaged or defective materials and workmanship.  Guarantee includes Spring start-up, winterization, maintenance, necessary testing, program corrections or adjustments and restoration of settled trenches, valve boxes, and sprinkler heads. Guarantee includes flow sensing verification.

3.37.3

Guarantee will not apply to materials or workmanship damaged after Substantial Performance by causes beyond the Contractor’s control, such as vandalism or abuse. 

2.0 Products

(replace 2.6.4)

2.6.4

Steel Pedestrian/Cyclist Pushbutton Posts: Fabrication to conform to Standard Detail Drawing E6.3, with the exception that the pushbutton be mounted at 750 mm above surface level.

2.7 Conductors and Cables

(add)

2.7.5

IMSA cable: Type 19-1, stranded. Number and size of conductor as per Contract Drawings.

2.11 Service Panels

(replace 2.11.1)

2.11.1

Service panels shall be as shown on the Contract Drawings.

2.15 Traffic and Pedestrian Signals

(replace 2.15.1 and delete 2.15.2)

2.15.1

Traffic signal heads to be 300mm yellow polycarbonate with tunnel visors, number and type as per Contract Drawings. If a backboard is specified it shall be yellow aluminium with 75mm border of yellow prismatic, retro-reflective sheeting. Pedestrian heads to be green polycarbonate, number and type as per Contract Drawings.

2.16 LED Signal Modules

(add)

2.16.2

All ball indication traffic signal heads shall have a 15-year warranty.

2.17 Signal Mounting Hardware

(replace 2.17.1)

2.17.1

Side mount brackets as per Standard Detail Drawings E5.2 and Supplemental Drawing SS-E5.3

(replace 2.17.2 and delete 2.17.3 - 2.17.7)

2.17.2

Overhead signal head mounting as per Standard Detail Drawing E5.9.

2.18 Audible Signals

(replace 2.18.1)

2.18.1

For head mounted APS speakers, mount as per Supplemental Drawing SS-E5.12. For integral pushbutton, APS systems to replace the standard bulldog pushbutton, mounted at 750 mm above surface.

2.24 NEMA Traffic Control Cabinets

(replace 2.24.1 and delete 2.24.2 - 2.24.4)

2.24.1

Traffic Control Cabinets to be supplied by the City.

2.25 Video Detection System

(replace 2.25.1 and delete 2.24.2 - 2.24.3)

2.24.1

Video detection system to be supplied by the City.

2.26 Uninterruptable Power Supply

(replace 2.26.1)

2.26.1

Uninterruptable Power System to be supplied by the City.

3.0 EXECUTION

3.4 Junction Boxes and Vaults

(replace 3.4.1)

3.4.1

Install junction boxes and vaults as shown on Supplemental Drawings SS-E2.1 – 2.5 and Standard Detail Drawing E2.6.

3.6 Poles and Related Equipment

(replace 3.6.7)

3.6.7

Field drilling of holes larger than 33 mm diameter not allowed in Type 1, 3, 6, 7, L, & S shafts, and all arms and extensions. Where larger holes are required, reinforce holes with welded bushing prior to galvanizing.

3.7 Traffic Signal and Pedestrian Head Mounting

(replace 3.7.1)

3.7.1

Install traffic and pedestrian heads as shown in Standard Detail Drawings E5.2, E5.9 and Supplemental Drawing SS-E5.3.

3.8 Audible Signals

(replace 3.8.1)

3.8.1

For head mounted APS speakers, mount as per Supplemental Drawing SS-E5.12. For integral pushbutton, APS systems to replace the standard bulldog pushbutton, mounted at 750 mm above surface.

3.9 Pedestrian Pushbuttons

(replace 3.9.1)

3.9.1

Install pedestrian pushbuttons and posts as shown on Standard Detail Drawings E6.1 to E6.3. Pedestrian activated pushbuttons to be mounted at 750 mm above surface.

3.10 Luminaires and Photocells

(replace 3.10.2)

3.10.2

Luminaires to be installed parallel with the longitudinal grade of the road surface, to reduce glare on the downhill side.

3.11 Electrical Service

(replace 3.11.1)

3.11.1

Install services as per FortisBC standards.

3.12 Electrical Service Panels

(replace 3.12.1)

3.12.1

Mount electrical service and meter panels as shown in Supplementary Drawing SS-E1.4.

3.14 Wiring

(replace 3.14.1)

3.14.1

Streetlight light wiring to be spliced in the handhole as per Supplemental Drawing SS-E7.11. Wiring for signal heads to be spliced in the nearest junction box.

(replace 3.14.3)

3.14.3

Video detection and Pre-emption wiring to run from cabinet to device with no splice.

(replace 3.14.4)

3.14.4

19 conductor IMSA cable to be run from cabinet to junction box nearest pole and spliced as per Standard Detail Drawing E7.13. Single conductors to be run from junction box to signal heads and spliced as per Supplemental Drawing SS-E7.19.