OLIVER MIDDLE SCHOOL PARKING LOT EXPANSION

PROJECT NO.: 260416-01

April 9, 2026

ADDENDUM NO. ONE (1)

THE FOLLOWING CHANGES, ADDITIONS, AND DELETIONS TO THE CONTRACT DOCUMENTS

DATED APRIL 9, 2026, HEREBY BECOME A PART OF THE CONTRACT DOCUMENTS, PER THE

ORIGINAL CONTRACT DOCUMENTS DATED MARCH 25, 2026.

NOTIFY ALL SUBCONTRACTORS AFFECTED BY THIS ADDENDUM.

BID DUE UNCHANGED: Thursday, April 16, 2026, 3:00 PM

SPECIFICATIONS

1. See attached Section 32 93 00 Plants

DRAWINGS

N/A

GENERAL INFORMATION

1. Pre-bid conference agenda attached.

END OF ADDENDUM ONE (1)

Attachments Specification Section 92 93 00 Plants Pre-bid Agenda

Oliver M.S. Parking Expansion 32 93 00 Bid Set-ADD#1 PLANTS March 23, 2026

Robertson Fick Engineering, PC

CENT-03

SECTION 32 93 00

PLANTS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. All labor, materials, equipment, transportation and services pertaining to the installation and maintenance planting including but not limited to the following:

1. Plants.

2. Tree Stabilization.

1.02 RELATED SECTIONS

B. 32 91 13 – Soil Preparation.

1.03 REFERENCE STANDARDS

A. American Standard for Nursery Stock.

B. Association of American Nurserymen (AmericanHort).

1.04 ADMINISTRATIVE REQUIREMENTS

A. Refer to the drawings for additional requirements.

B. In the event of conflicting requirements with the requirements in this Specification, the most stringent requirements apply.

1.05 SUBMITTALS

A. Product Data: For each type of product indicated, including soils.

1. Plant Materials: Include quantities, sizes, quality, and sources for plant materials.

2. Pesticides and Herbicides: Include product label and manufacturer's application instructions specific to the Project.

B. Samples for Verification: For each of the following:

1. All Plants: Representative photo for each plant species in Plant Schedule(s).

C. Qualification Data: For qualified landscape Installer. Include list of similar projects completed by Installer demonstrating Installer's capabilities and experience. Include project names, addresses, and year completed, and include names and addresses of Owners' contact persons.

D. Product Certificates: For each type of manufactured product, from Manufacturer, and complying with the following:

1. Manufacturer's certified analysis of standard products.

2. Analysis of other materials by a recognized laboratory-made according to methods established by the Association of Official Analytical Chemists, where applicable.

E. Maintenance Instructions: Recommended procedures to be established by Owner's Authorized Representative for maintenance of plants during a calendar year. Submit before start of required maintenance periods.

F. Warranty: Sample of special warranty.

G. Substitutions:

1. See Section 01 60 00 – Product Requirements and Substitutions.

1.06 QUALITY ASSURANCE

A. Installer Qualifications: A qualified landscape Installer whose work has resulted in successful establishment of plants.

1. Professional Membership: Installer shall be a member in good standing of either the Professional Landcare Network or the American Nursery and Landscape Association.

2. Experience: Five years' experience in landscape installation.

3. Installer's Field Supervision: Require Installer to maintain an experienced full-time supervisor on Project site when work is in progress.

4. Personnel Certifications: Installer's field supervisor shall have certification in one of the following categories from the Planet - Professional Landcare Network:

a. Certified Landscape Technician - Exterior, with installation, maintenance, and irrigation specialty area(s).

b. Certified Landscape Industry Technician.

c. Pesticide Applicator: State licensed, commercial.

B. Plant Material Quality - Provide quality, size, genus, species, and variety of plants indicated, complying with applicable requirements in ANSI Z60.1.

1. All plants shall be freshly dug or well rooted in containers. Root balls shall be firm, intact and suitably sized.

2. Where formal arrangements or symmetrically aligned plants are indicated provide materials with uniform size and character.

3. Provide well-formed healthy, vigorous stock grown under climatic conditions similar to the sites. Plants shall be free of damage, injury, defects, disease, insects, and disfigurements.

4. Conifers shall have a single leader. Conifers that have ever been sheared are not acceptable.

C. Measurements: Measure according to ANSI Z60.1. Do not prune to obtain required sizes.

1. Trees and Shrubs: Measure with branches and trunks or canes in their normal position.

Take height measurements from or near the top of the root flare for field-grown stock and container grown stock. Measure main body of tree or shrub for height and spread; do not measure branches or roots tip to tip. Take caliper measurements 6 inches above the root flare for trees up to four (4) inch caliper size, and twelve (12) inches above the root flare for larger sizes.

2. Other Plants: Measure with stems, petioles, and foliage in their normal position.

D. Plant Material Observation: Engineer may observe plant material either at place of growth or at site before planting for compliance with requirements for genus, species, variety, cultivar, size, and quality. Engineer retains right to observe trees and shrubs further for size and condition of balls and root systems, pests, disease symptoms, injuries, and latent defects and to reject unsatisfactory or defective material at any time during progress of work. Remove rejected trees or shrubs immediately from Project site.

1. Notify Engineer of sources of planting materials seven (7) business days in advance of delivery to site.

1.07 DELIVERY, STORAGE, AND HANDLING

A. Packaged Materials: Deliver packaged materials in original, unopened containers showing weight, certified analysis, name and address of Manufacturer, and indication of conformance with state and federal laws if applicable.

B. Bulk Materials:

1. Do not dump or store bulk materials near structures, utilities, walkways, and pavements, or on existing turf areas or plants.

2. Provide erosion-control measures to prevent erosion or displacement of bulk materials, discharge of soil-bearing water runoff, and airborne dust reaching adjacent properties, water conveyance systems, or walkways.

3. Accompany each delivery of bulk fertilizers, lime, and soil amendments with appropriate certificates.

C. Do not prune trees and shrubs before delivery. Protect bark, branches, and root systems from sun scald, drying, windburn, sweating, whipping, and other handling and tying damage. Do not bend or bind-tie trees or shrubs in such a manner as to destroy their natural shape. Provide protective covering of plants during shipping and delivery. Do not drop plants during delivery and handling.

D. Handle planting stock by root ball.

E. Deliver plants after preparations for planting have been completed, and install immediately. If planting is delayed more than six hours after delivery, set plants and trees in their appropriate aspect (sun, filtered sun, or shade), protect from weather and mechanical damage and keep roots moist.

1. Set balled stock on ground and cover ball with soil, peat moss, sawdust, or other acceptable material.

2. Do not remove container-grown stock from containers before time of planting.

3. Water root systems of plants stored on-site deeply and thoroughly with a fine-mist spray.

Water as often as necessary to maintain root systems in a moist, but not an overly-wet condition.

1.08 SITE CONDITIONS

A. Field Measurements: Verify actual grade elevations, service and utility locations, irrigation system components, and dimensions of plantings and construction contiguous with new plantings by field measurements before proceeding with planting work.

B. Interruption of Existing Services or Utilities: Do not interrupt services or utilities to facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary services or utilities according to requirements indicated:

1. Notify Construction Manager no fewer than five business days in advance of proposed interruption of each service or utility.

2. Do not proceed with interruption of services or utilities without Construction Manager's written permission.

C. Planting Restrictions: Plant shall not be permitted during one of the following periods.

Coordinate planting periods with maintenance periods to provide required maintenance from the date of Substantial Completion.

1. Cold Weather: When temperature is less than Thirty-two (32)°F.

2. Hot Weather: When temperature is greater than ninety (90)°F.

3. Wet Conditions: When planting area soils are soggy and saturated. Except in swale and pond areas.

4. Windy Weather: When wind velocities are greater than thirty (30) mph.

D. Weather Limitations: Proceed with planting only when existing and forecasted weather conditions permit planting to be performed when beneficial and optimum results may be obtained. Apply products during favorable weather conditions according to Manufacturer's written instructions and warranty requirements.

1.09 DEFINITIONS

A. Backfill: The earth used to replace or the act of replacing earth in an excavation.

B. Balled and Burlapped Stock: Plants dug with firm, natural balls of earth in which they were grown, with ball size not less than diameter and depth recommended by ANSI Z60.1 for type and size of plant indicated; wrapped with burlap, tied, rigidly supported, and drum laced with twine with the root flare visible at the surface of the ball as recommended by ANSI Z60.1.

C. Balled and Potted Stock Plants dug with firm, natural balls of earth in which they are grown and placed, unbroken, in a container. Ball size is not less than diameter and depth recommended by ANSI Z60.1 for type and size of plant indicated.

D. Container-Grown Stock: Healthy, vigorous, well-rooted plants grown in a container, with a well-established root system reaching sides of container and maintaining a firm ball when removed from container. Container shall be rigid enough to hold ball shape and protect root mass during shipping and be sized according to ANSI Z60.1 for type and size of plant indicated.

E. Duff Layer: The surface layer of native topsoil that is composed of mostly decayed leaves, twigs, and detritus.

F. Finish Grade: Elevation of finished surface of planting soil.

G. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand with stabilized organic soil amendments to produce topsoil or planting soil.

H. Pesticide: A substance or mixture intended for preventing, destroying, repelling, or mitigating a pest. This includes insecticides, miticides, herbicides, fungicides, rodenticides, and molluscicides. It also includes substances or mixtures intended for use as a plant regulator, defoliant, or desiccant.

I. Pests: Living organisms that occur where they are not desired, or that cause damage to plants, animals, or people. These include insects, mites, grubs, mollusks (snails and slugs), rodents (gophers, moles, and mice), unwanted plants (weeds), fungi, bacteria, and viruses.

J. Planting Area: Areas to be planted.

K. Planting Soil: Synonymous with Growing Medium. Standardized topsoil; existing, native surface topsoil; existing, in-place surface soil; imported topsoil; or manufactured topsoil that is modified with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth.

L. Plant Material: These terms refer to vegetation in general, including trees, shrubs, vines, ground covers, ornamental grasses, bulbs, corms, tubers, or herbaceous vegetation.

M. Root Flare: Also called "trunk flare." The area at the base of the plant's stem or trunk where the stem or trunk broadens to form roots; the area of transition between the root system and the stem or trunk.

N. Stem Girdling Roots: Roots that encircle the stems (trunks) of trees below the soil surface.

O. Subsoil Grade: Surface or elevation of subsoil remaining after the excavation is complete, or the top surface of a fill or backfill before planting soil is placed.

P. Subsoil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic matter and soil organisms.

Q. Surface Soil: Soil that is present at the top layer of the existing soil profile at the Project site. In undisturbed areas, the surface soil is typically topsoil; but in disturbed areas such as urban environments, the surface soil can be subsoil.

1.10 WARRANTY

A. Special Warranty: Installer agrees to repair or replace plantings and accessories that fail in materials, workmanship, or growth within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Death and unsatisfactory growth, except for defects resulting from abuse, lack of adequate maintenance, or neglect by Owner, or incidents that are beyond Contractor's control.

b. Structural failures including plantings falling or blowing over.

c. Faulty performance of tree stabilization and edgings, B. Warranty Periods from Date of Substantial Completion:

1. Trees, Shrubs, Vines, and Ornamental Grasses, Ground Covers, Biennials, Perennials, and Other Plants: ninty (90) day

2. Include the following remedial actions as a minimum:

a. Immediately remove dead plants and replace them unless required to plant in the succeeding planting season.

b. Replace plants that are more than 25% dead or in an unhealthy condition at end of warranty period.

c. During the warranty period, each dead plant will be replaced without any limitations on quantity of replacements.

d. Provide extended warranty for period equal to original warranty period, for replaced plant material.

1.12 MAINTENANCE SERVICE

A. Initial Maintenance Service for Trees, Shrubs, Vines, Ornamental Grasses, Ground Covers, Biennials, Perennials, and Other Plants: Provide maintenance by skilled employees of landscape Installer. Maintain as required in Part 3. Begin maintenance immediately after plants are installed and continue until plantings are acceptably healthy and well established but for not less than maintenance period below.

1. Maintenance Period: 90 days from date of Substantial Completion.

PART 2 PRODUCTS

2.01 PLANT MATERIAL

A. General: Furnish nursery-grown plants true to genus, species, variety, cultivar, stem form, shearing, and other features indicated in Plant Schedule or Plant Legend shown on the drawings and complying with ANSI Z60.1; and with healthy root systems developed by transplanting or root pruning. Provide well-shaped, fully branched, healthy, vigorous stock, densely foliated when in leaf and free of disease, pests, eggs, larvae, and defects such as knots, sunscald, injuries, abrasions, and disfigurement.

1. Trees with damaged, crooked, or multiple leaders; tight vertical branches where bark is squeezed between two branches or between branch and trunk ("included bark"); crossing trunks; cut-off limbs more than three-quarter (3/4) inch in diameter; or with stem girdling roots will be rejected.

2. Collected Stock: Do not use plants harvested from the wild, from native stands, from an established landscape planting, or not grown in a nursery unless otherwise indicated.

B. Provide plants of sizes, grades, and ball or container sizes complying with ANSI Z60.1 for types and forms of plants required. Plants of a larger size may be used if acceptable to Engineer, with a proportionate increase in size of roots or balls.

2.02 BIOTIC AMENDMENT

A. See Section 32 91 13 – Soil Preparation.

2.03 SOIL AMENDMENTS

A. See Section 32 91 13 – Soil Preparation.

2.04 MULCHES

A. Organic Compost Mulch: Free from deleterious materials and suitable as a top dressing of trees and shrubs, consisting of one (1) of the following:

1. Dark Hemlock Bark or approved equal.

a. Depth: 3”.

b. Size: 5/8”.

c. Color: Black.

2.05 TREE STABILIZATION MATERIALS

A. Stakes and Guys:

1. Upright and Guy Stakes: Smooth, sound, new softwood stakes specified without wood pressure-preservative treatment, free of knots, holes, cross-grain, and other defects, two

(2) inch by two (2) inch nominal by length indicated, pointed at one end.

2. Tree Tie: one (1) inch Black ProLock Chain-Lock Tree Tie, or approved equal.

2.06 MISCELLANEOUS PRODUCTS

A. Antidesiccant: Water-insoluble emulsion, permeable moisture retarder, film-forming, for trees and shrubs. Deliver in original, sealed, and fully labeled containers and mix according to manufacturer's written instructions.

B. Burlap: Non-synthetic, biodegradable.

C. Mycorrhizal Fungi: Dry, granular inoculant containing at least 5,300 spores per pound (0.45 kg) of vesicular-arbuscular mycorrhizal fungi and 95 million spores per pound (0.45 kg) of ectomycorrhizal fungi, 33% hydrogel, and a maximum of 5.5% inert material.

PART 3 EXECUTION

3.01 EXAMINATION

A. Examine areas to receive plants for compliance with requirements and conditions affecting installation and performance.

1. Verify that no foreign, deleterious material or liquid such as paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, or acid have been deposited in soil within a planting area.

2. Do not mix or place soils and soil amendments in frozen, wet, or muddy conditions.

3. Suspend soil spreading, grading, and tilling operations during periods of excessive soil moisture until the moisture content reaches acceptable levels to attain the required results.

4. Uniformly moisten excessively dry soil that is not workable and which is too dusty.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

C. If contamination by foreign or deleterious material or liquid is present in soil within a planting area, remove the soil and contamination as directed by Engineer and replace with new planting soil.

D. Thoroughly inspect all planting areas for the presence of any weeds. If any weeds are present, apply an approved herbicide to the affected areas and delay soil and planting preparations until all weeds are removed. Follow the Manufacturer’s recommendation for herbicide application.

See Section 32 91 13 – Soil Preparation for Weed Control requirements prior to plant installation.

3.02 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities and turf areas and existing plants from damage caused by planting operations.

B. Install erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

C. Apply antidesiccant to trees and shrubs using power spray to provide an adequate film over trunks (before wrapping), branches, stems, twigs, and foliage to protect during digging, handling, and transportation.

1. If deciduous trees or shrubs are moved in full leaf, spray with antidesiccant at the nursery before moving and again two (2) weeks after planting.

D. Wrap trees and shrubs with burlap fabric over trunks, branches, stems, twigs, and foliage to protect from wind and other damage during digging, handling, and transportation.

3.03 EXCAVATION FOR TREES AND SHRUBS

A. Layout the individual tree and shrub locations and areas for multiple plantings. Stake locations, outline areas, adjust locations when requested, and obtain Engineer’s acceptance of layout before excavating or planting. Make minor adjustments as required.

B. Planting Pits and Trenches: Excavate circular planting pits with sides sloping inward at a forty-five (45) degree angle. Excavations with vertical sides are not acceptable. Trim perimeter of bottom leaving center area of bottom raised slightly to support root ball and assist in drainage away from center. Do not further disturb base. Ensure that root ball will sit on undisturbed base soil to prevent settling. Scarify sides of planting pit smeared or smoothed during excavation.

1. Excavate approximately three times as wide as ball diameter for balled and burlapped, and container-grown, stock.

2. Do not excavate deeper than depth of the root ball, measured from the root flare to the bottom of the root ball.

3. If area under the plant was initially dug too deep, add soil to raise it to the correct level and thoroughly tamp the added soil to prevent settling.

4. Maintain required angles of repose of adjacent materials as shown on the drawings. Do not excavate subgrades of adjacent paving, structures, hardscapes, or other new or existing improvements.

5. Maintain supervision of excavations during working hours.

6. Keep excavations covered or otherwise protected after working hours or when unattended by Installer's personnel.

7. If drain tile is shown on the drawings or required underplanting areas, excavate to top of porous backfill over tile.

C. Subsoil removed from excavations may not be used as planting soil.

D. Obstructions: Notify Engineer if unexpected rock or obstructions detrimental to trees or shrubs are encountered in excavations.

1. Hardpan Layer: Drill six (6) inch diameter holes, twenty-four (24) inches apart, into free-draining strata or to a depth of ten (10) feet, whichever is less, and backfill with free-draining material.

E. Drainage: Notify Engineer if subsoil conditions evidence unexpected water seepage or retention in tree or shrub planting pits.

F. Fill excavations with water and allow to percolate away before positioning trees and shrubs.

3.04 TREE, SHRUB, AND VINE PLANTING

A. Before planting, verify that root flare is visible at top of root ball according to ANSI Z60.1. If root flare is not visible, remove soil in a level manner from the root ball to where the top-most root emerges from the trunk. After soil removal to expose the root flare, verify that root ball still meets size requirements.

B. Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly; do not break.

C. Set balled, burlapped and container-grown stock plumb and in center of planting pit or trench with root flare of Trees two (2) inches and Shrubs and Vines one (1) inch above adjacent finish grade of topsoil.

1. Use planting soil for backfill.

2. After placing some backfill around root ball to stabilize plant, carefully cut and remove burlap, rope, and wire baskets from tops of root balls and from sides, but do not remove from under root balls. Remove pallets, if any, before setting. Do not use planting stock if root ball is cracked or broken before or during planting operation.

3. For container-grown stock carefully remove root ball from container without damaging root ball or plant.

4. Backfill around root ball in layers, tamping to settle soil and eliminate voids and air pockets. When planting pit is approximately one-half filled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed.

5. Place planting tablets in each planting pit when pit is approximately one-half (1/2) filled; in amounts recommended in soil reports from soil testing laboratory. Place tablets beside the root ball about one (1) inch from root tips; do not place tablets in bottom of the hole.

6. Continue backfilling process. Water again after placing and tamping final layer of soil.

D. When planting on slopes, set the plant so the root flare on the uphill side is flush with the surrounding soil on the slope; the edge of the root ball on the downhill side will be above the surrounding soil. Apply enough soil to cover the downhill side of the root ball.

3.05 TREE, SHRUB, AND VINE PRUNING

A. Remove only dead, dying, or broken branches. Do not prune for shape.

B. Prune, thin, and shape trees, shrubs, and vines as directed by Engneer.

C. Prune, thin, and shape trees, shrubs, and vines according to standard professional horticultural and arboricultural practices. Unless otherwise indicated by the Engineer, do not cut tree leaders; remove only injured, dying, or dead branches from trees and shrubs; and prune to retain natural character.

D. Do not apply pruning paint to wounds.

3.06 TREE STABILIZATION

A. Install trunk stabilization as follows unless otherwise indicated:

1. Upright Staking and Tying: Stake trees of one (1) inch through five (5) inch caliper. Stake trees of less than two (2) inch caliper only as required to prevent wind tip out. Use a minimum of two stakes of length required to penetrate at least thirty-six (36) inches below bottom of backfilled excavation and to extend to one-third of trunk height above grade. Set vertical stakes and space to avoid penetrating root balls or root masses.

2. Use two stakes for trees up to twelve (12) feet high and two and a half (2-1/2) inches or less in caliper; three stakes for trees less than fourteen (14) feet high and up to four (4) inches in caliper. Space stakes equally around trees.

3. Support trees with two strands of ties. Allow enough slack to avoid rigid restraint of tree.

3.07 GROUND COVER AND PLANT PLANTING

A. Set out and space ground cover and plants other than trees, shrubs, and vines as indicated on the drawings in even rows with triangular spacing.

B. Use planting soil for backfill.

C. Dig holes large enough to allow spreading of roots.

D. For rooted cutting plants supplied in flats, plant each in a manner that will minimally disturb the root system but to a depth not less than two nodes.

E. Work soil around roots to eliminate air pockets and leave a slight saucer indentation around plants to hold water.

F. Water thoroughly after planting, taking care not to cover plant crowns with wet soil.

G. Protect plants from hot sun and wind; remove protection if plants show evidence of recovery from transplanting shock.

H. Root Ball Depth: Furnish trees and shrubs with root balls measured from top of root ball, which shall begin at root flare according to ANSI Z60.1. Root flare shall be visible before planting.

I. Labeling: Label at least one plant of each variety, size, and caliper with a securely attached, waterproof tag bearing legible designation of common name and full scientific name, including genus and species. Include nomenclature for hybrid, variety, or cultivar, if applicable for the plant as shown on the drawings.

J. If formal arrangements or consecutive order of plants is shown on the drawings, select stock for uniform height and spread, and number the labels to assure symmetry in planting.

K. Annuals and Biennials: Provide healthy, disease-free plants of species and variety shown or listed, with well-established root systems reaching to sides of the container to maintain a firm ball, but not with excessive root growth encircling the container. Provide only plants that are acclimated to outdoor conditions before delivery and that are in bud but not yet in bloom.

L. Planting Tablets: Tightly compressed chip type, long-lasting, slow-release, commercial-grade planting fertilizer in tablet form. Tablets shall break down with soil bacteria, converting nutrients into a form that can be absorbed by plant roots.

1. Size: 21-gram tablets.

2. Nutrient Composition: 20% nitrogen, 10% phosphorous, and 5% potassium, by weight plus micronutrients.

3.08 STORMWATER FACILITY PLANTING

A. Protection of the Growing Medium - The growing medium shall be protected from all sources of contamination, including weed seeds, while at the supplier, in conveyance, and at the project site.

B. Weed removal by mechanical methods only. The use of chemicals shall not be used.

C. Timing of Plant Installation - Weather permitting, plants shall be installed as soon as possible after placing and grading the growing medium in order to minimize erosion and further compaction.

D. Erosion Control - Temporary erosion control measures are required until permanent stabilization measures are functional, including protection of overflow structures.

E. Protection of the Facility - In all cases, the facility must be protected from foot or equipment traffic that is unrelated to the construction of the facility. Temporary fencing or walkways should be installed as needed to keep workers, pedestrians, and equipment out of the facility. Under no circumstances should materials and equipment be stored in the facility. Stormwater facilities shall be kept clean and shall not be used as erosion and sediment control structures during construction.

F. Wet and Winter Conditions - Placement of the growing medium will not be allowed when the ground is frozen or saturated or when the weather is determined to be too wet.

G. Apply surface mulch treatment per jurisdiction water quality facility standards.

3.09 PLANTING AREA MULCHING

A. Mulch backfilled surfaces of planting areas and other areas indicated.

1. Trees and Tree-like Shrubs in Turf Areas: Apply organic mulch ring of three (3) inch average thickness, with eighteen (18) inch radius around trunks or stems. Do not place mulch within six (6) to eight (8) inches of trunks or stems.

2. Organic Mulch in Planting Areas: Apply three (3) inch average thickness of organic mulch over whole surface of planting area, and finish level with adjacent finish grades. Do not place mulch within six (6) to eight (8) inches of trunks or stems.

3.10 PLANT MAINTENANCE

A. Maintain plantings by pruning, cultivating, watering, weeding, fertilizing, mulching, restoring planting saucers, adjusting and repairing tree-stabilization devices, resetting to proper grades or vertical position, and performing other operations as required to establish healthy, viable plantings. Spray or treat as required to keep trees and shrubs free of insects and disease.

B. Fill in as necessary soil subsidence that may occur because of settling or other processes.

Replace mulch materials damaged or lost in areas of subsidence.

C. Apply treatments as required to keep plant materials, planted areas, and soils free of pests and pathogens or disease. Use integrated past management practices whenever possible to minimize the use of pesticides and reduce hazards. Treatments include physical controls such as hosing off foliage, mechanical controls such as traps, and biological control agents.

3.11 HAND WATER

A. Hand water trees and plants as necessary to establish vegetation for ninety (90) days from Substantial Completion. Water is available at the site, coordinate with Owner.

3.12 PESTICIDE AND HERBICIDE APPLICATION

A. Apply pesticides, herbicides and other chemical products and biological control agents in accordance with authorities having jurisdiction and manufacturer's written recommendations for each specific problem and as required for Project conditions and application. Do not use restricted pesticides and herbicides unless authorized in writing by authorities having jurisdiction. Coordinate applications with Owner's operations and others in proximity to the Work. Notify Owner’s Representative before and at the completion of each application performed.

1. Herbicide Types:

a. Pre-Emergent Herbicide (Selective and Non-Selective): Effective for controlling the germination or growth of weeds in non-seeded planted areas.

b. Post-Emergent Herbicide (Selective and Non-Selective): Effective for controlling weed growth that has already germinated.

2. Application:

a. Application of pre-emergent in all non-seeded planting areas shall occur after all plantings have been installed at the soil level directly below the mulch layer. An additional pre-emergent layer shall be placed at the mulch level at the following approved application period.

b. Approved application periods occur February fifteen (15) through March fifteen (15) and September fifteen (15) through October fifteen (15) when temperatures are at or above fifty (50)°F.

3. Application of post-emergent shall occur when weeds have germinated.

4. Application of pesticides shall occur when pests are present.

a. Provide the following information:

1) The product name of the pesticide applied;

2) The date and time of application;

3) The location to which the pesticide was applied;

4) The pest to be controlled.

5. Use of herbicides not allowed in stormwater facilities, by bodies of water, during a rain event, or in winds exceeding five (5) mph.

B. Pre-Emergent Herbicides (Selective and Non-Selective): Apply to tree, shrub, and ground-cover areas in accordance with manufacturer's written recommendations.

C. Post-Emergent Herbicides (Selective and Non-Selective): Apply only as necessary to treat already-germinated weeds and in accordance with manufacturer's written recommendations.

3.13 CLEANUP AND PROTECTION

A. During planting, keep adjacent paving and construction clean and work area in an orderly condition.

B. Protect plants from damage due to landscape operations and operations of other contractors and trades. Maintain protection during installation and maintenance periods. Treat, repair, or replace damaged plantings.

C. After installation and before Substantial Completion, remove nursery tags, nursery stakes, tie tape, labels, wire, burlap, and other debris from plant material, planting areas, and Project site.

3.14 DISPOSAL

A. Remove surplus soil and waste material including excess subsoil, unsuitable soil, trash, and debris and legally dispose of them off Owner's property.

END OF SECTION

NON-MANDATORY PRE-BID MEETING AGENDA

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ITEM # DESCRIPTION

1.0 Team Introductions

2.0 Non-Mandatory Pre-Bid meeting - Record of Attendance

3.0 Future Site Visit:

3.1 Contact Scott Rose, scott@randcmanagement.com to schedule future site visits.

4.0 Request for Bids / Bid Dates

4.1 Bids Due 3:00 PM April 16, 2026

4.2 Substitution Requests

4.2.1 Send to Jeff Torgerson jeff@robertsonfick.com

4.2.2 Submit any substitution requests by end of day April 7 2026, per Instructions to Bidders.

4.2.3 See specification section 01 6000 - PRODUCT REQUIREMENTS AND

SUBSTITUTION for substitution requirements/procedures.

4.2.4 Substitution request need to be filled out on the Substitution Request form available in section 01 6325 of the specifications.

4.3 Any Questions / RFI’s .

4.3.1 Send to scott@randcmanagment.com

4.3.2 Submit any questions/RFI requests by end of day April 7, 2026.

4.3.3 Last Addendum will be issued by April 9, 2026, that will include record of attendance, pre-bid agenda and city comments.

4.3 Location Bids Due

To: Centennial School District

By U.S. Mail:

Centennial School District District Office – Bid #260416-01 18135 SE Brooklyn Street Portland, OR 97236

CENTENNIAL SCHOOL DISTRICT

Project #260416-01 Parking Lot Expansion at Oliver Middle School Pre-Bid Meeting

Date of Meeting: 4/2/26 @ 2:00 PM Location of Meeting:

Oliver Middle School

15840 SE Taylor St., Portland, OR 97233 mailto:jeff@robertsonfick.com

By hand delivery:

Centennial School District 18135 SE Brooklyn Street Portland, OR 97236 District Office Bid #260416-01

5.0 Construction Schedule (See Spec 00 11 10 – Summary of work) The General Contractor shall include the following anticipated date constraints for the Work.

1. Issue Intent to Award. 4/17/26

2. School Board Approval of the Agreement. 5/13/26

3. Issuance of the Notice to Proceed. 5/14/26

4. Site available for Contractor mobilization. 6/15/26

5. Agency Release of the Permit 6/1/26

6. Date of Substantial Completion. 8/14/26

6.0 Bid Form Section 00 41 00

6.1 Base Bid Complete Project, Expected bid of $250,000

6.2 Bid Bond requirements – see instruction to bidders.

6.3 Performance / Payment bonds provided with signed contract – see instruction to bidders.

7.0 Agreement / General Conditions

7.1 Agreement between CSD and Contractor. Public Works contract.

8.0 Prevailing Wage

8.1 Must comply with State of Oregon prevailing wage requirements.

9.0 Jobsite / Site Logistics

9.1 Work hours-comply with City regulations.

9.2 Site laydown areas within the limits of the site.

10.0 Permits/Fees

10.1 Building permit fees – Procured and paid by District.

10.2 Trade permits fees – Procured paid by GC’s subcontractors.

10.3 Status – Under review with City.

10.4 Owner shall provide Special Inspections as needed.

11.0 Summary of Work

11.1 Scope of work.

12.0 Questions