CON26-0006_Attachment_1_Specs.pdf

Precita Park Improvements Project

06/12/2025 01 56 39 Temporary Tree & Plant Protection

SECTION 01 56 39

TEMPORARY TREE AND PLANT PROTECTION

PART 1 - GENERAL

1.01 SUMMARY

A. Section Includes:

1. Requirements for the protection of existing trees and shrubs that are shown to remain on the Drawings, including entire structure of plant material above and below ground impacted by all demolition and construction work under this Contract.

2. Irrigation as directed or as required to maintain the health of trees and other plants to remain, where existing irrigation of such plants is shut down for the work of this Contract.

3. Maintenance of existing trees during construction.

B. Related Requirements:

1. Section 01 11 00 - Summary of Work.

2. Section 01 71 33 - Protection of Adjacent Construction

1.02 ADMINISTRATIVE REQUIREMENTS

A. Submittal Procedures:

1. Action and Informational Submittals shall be submitted in accordance with Section 01 33 00 “Submittal Procedures.”

B. Pre-construction Meeting:

1. Prior to commencement of work, the Contractor shall arrange a meeting on the site with the City Representative, General Contractor, and such others as the City Representative shall direct, to review the proposed schedule, the “Trees of Concern”, the tree and landscape protection, submittals for this Section, the coordination with work of other trades, and the selective thinning and clearing requirements.

2. Adjustments to the type and extent of the protection shall be addressed at the time of the meeting.

3. Contractor shall coordinate the meeting and inform all parties in writing (5) business days in advance of the scheduled meeting.

C. Coordination: Coordinate tree work schedule with City Representative so that tree pruning is complete before site work begins or scheduled according to construction sequencing. Notify City Representative minimum 5 working days in advance of any work requiring tree pruning.

D. Sequencing and Scheduling: Adjust, relate together, and otherwise coordinate work of this Section with work of Project and all other Sections of Project Specifications.

1.03 ACTION SUBMITTALS

A. Samples:

1. Tree protection fencing material or trunk protection materials.

2. Mulch for Tree Protection.

B. Work Plan: Prepare for erecting tree protection measures and for pruning of existing trees. Plan shall include procedures for temporary irrigation and wood mulch in the existing tree root zones. Work plan shall be submitted and approved by the City Representative and arborist prior to the removal of any pavement in the root zones of existing trees to remain.

1.04 INFORMATIONAL SUBMITTALS

A. Qualifications of arborist as specified.

1.05 QUALITY ASSURANCE

A. Contractor is prohibited from stockpiling any excavation or construction materials within the canopy of trees to remain.

B. Contractor shall immediately clean and remove any construction residue that falls within the canopy of a tree to remain.

C. Contractor shall engage services of certified Arborist who is a member of the American Society of Consulting Arborists, Inc. (ASCA full time during construction activities impacting existing trees to remain. The name and qualifications of the Arborist shall be submitted for approval by the City Representative.

1. Arboricultural work including tree removal, pruning and care for trees to remain shall be performed by personnel familiar with arboricultural work, under the supervision of an experienced professional Arborist and foreman at all times.

2. Work in this Section shall be by a firm which has successfully completed landscape work similar in quality and extent to that indicated for this project for a period of not less than ten (10) years. Supervisory personnel with experience on projects of similar size and extent shall supervise the work.

D. Contractor shall notify City Representative when installation of protective fencing and mulch is complete and shall not proceed with site work until such installation is approved by City Representative.

E. Contractor shall keep City Representative informed of the work schedule, so that City Representative may be on hand to observe the work and give direction regarding tree protection during the work.

1.06 FIELD CONDITIONS

A. Environmental Requirements: Perform work only during suitable weather conditions.

Do not disc, rototill, or work soil when frozen, excessively wet, or in otherwise unsatisfactory condition.

B. Contractor shall mark for review utilities, grading, footings, structures, or any other disturbance planned in the vicinity of existing trees.

1.07 APPROVAL OF TRENCHING AND EXCAVATION

A. The Contractor shall obtain written approval from the City Representative and a certified Arborist prior to start of excavation work within the drip line of trees to remain. A Certified Arborist shall be retained as needed to provide written direction at the Contractor’s expense.

B. The Contractor is prohibited from using equipment for trench and excavation work within the tree drip line of trees to remain.

C. In the event pruning is required for roots greater than 2 inches in diameter, the Contractor shall receive written direction from the City Representative in coordination with Arborist prior to continuation of work.

1.08 NON-APPROVED TRENCHING

A. In the event trenching or excavation is performed by the Contractor within the drip line of trees to remain, without the approval or not as shown on the Contract Drawings;

the Contractor shall be subject to a fine equal to one half day liquidated damages for every 50-feet.

B. The only exception to paragraph 1.06A is for trenching to a maximum of 3-feet as measured horizontally without approval at any location for the placement of pipe fittings and quick couplers outside the drip line of any tree.

1.09 DAMAGE TO TREES AND PAYMENT FOR DAMAGE

A. If the Contractor should cause minor damage as defined by nicked tree trunks, limbs and branches or broken branches to trees shown to remain during construction, the Contractor shall pay the following penalties at the beginning of each billing period:

1. The Contractor will be penalized the sum of One Hundred dollars ($100) for the first incident which causes minor damage to trees or shrubs.

2. The Contractor will be penalized the sum of Two Hundred dollars ($200) for the second incident which causes minor damage to trees or shrubs.

3. The Contractor will be penalized the sum of Five Hundred dollars ($500) for the third and subsequent incidents which cause minor damage to trees or shrubs.

B. The Contractor shall replace any trees or shrubs shown to remain that suffer more serious damage, including damage to roots 2-inches in diameter or larger, during construction at no additional cost to the City. The City Representative shall determine the value of such replacement trees or shrubs. In addition to the

Contractor’s restoration approved by the City Representative, the Contractor will be assessed damages for the difference in the dollar value of the damaged tree or other plant material, and the dollar value of the replacement.

1. The dollar value will be determined by the City Representative from the “Guide for Establishing Values of Trees and Other Plants,” prepared by the Council of Tree and Landscape Appraisers, current edition. Damages assessed will be deducted from moneys due or that may become due to the Contractor.

C. The Contractor shall in addition be liable for the cost to the City for removing the damaged tree(s). This cost will cover 1.5 times the hourly wage of all person(s) at the site for the required hours to remove the tree(s) and haul offsite as directed by the City Representative.

1.10 EXCAVATION WORK UNDER LOW HANGING BRANCHES

A. In areas where trenching is required under low hanging tree branches (8 to 12-feet off the ground), the Contractor shall operate equipment to a maximum height of 10-feet to avoid contact and possible damage to the tree branches.

1.11 MANUAL EXCAVATION

A. In areas where tree branches hang below 12-feet over the area to be excavated, adjacent to elderly trees or as directed by the City Representative, the Contractor shall manually excavate the trench. No machinery shall be used in the areas so designated for manual excavation.

1.12 DAMAGE TO LAWNS, PLANTED AREAS, AND EXISTING IRRIGATION SYSTEMS

A. Refer to the DPW Standard Specifications, Section 1009 – Restoration of Existing Lawn and Other Planting.

1.13 TRENCHING AND INSTALLATION OF UNDERGROUND UTILITIES NEAR TREE

ROOTS OF TREES TO REMAIN

A. New conduits shall be located at least 25-feet away from all tree trunks.

B. The Contractor shall not cut any tree roots over 2-inch in diameter unless an approved arborist is consulted. The Contractor shall bend and/or transition underground conduit and piping so that the conduit or piping will thread between tree roots. This 2-inch diameter tree root guideline is dependent of the species of tree or bush. Various trees and bushes have a more fibrous root system, consequently, severing a large number of these roots can be as detrimental to certain species of trees as severing a fewer number of larger tree roots.

C. When possible, trenches shall not be run on the side of the tree exposed to prevailing winds as roots are primarily anchored on the windward side. Trenches shall not be cut across more than one quadrant of the tree root zone.

D. Excavated material (fill and overlay) shall not be deposited under the leaf/needle canopy of established trees. The excavated material shall be placed in piles along one side of a paved surface. In no case shall the Contractor place the excavated material closer than 6-feet from the base of a tree.

E. The Contractor shall locate quick couplers and lateral lines. The Contractor shall cap tees as shown on the drawings unless located in the field directly under the tree drip line. In these cases, obtain the City Representatives approval for relocating the fitting(s).

PART 2 - PRODUCTS

2.01 TEMPORARY PROTECTION OF EXISTING TREES AND LANDSCAPE PLANTING

A. General: Temporary materials, new or used, that are adequate in capacity for the required usage, must not create unsafe conditions, and must not violate requirements of applicable Laws and Regulations, and shall be approved by the City Representative.

B. Tree Protection and Fencing: 4-foot tall polyethylene fabric fence (“snow fence”) or approved equal. Refer to Drawings for additional information.

C. Tree Trunk Protection: Tree wrap with plastic construction fencing, metal ties, 2x4lumber, wattle wrap, and nylon ties.

1. Height: 8 feet minimum, 12 feet maximum.

2. Fencing Material: Orange recycled HDPE plastic construction fencing.

3. Lumber: 2”x4”.

D. Protection Bedding Mulch: Recycled wood chips screened 3 inch minus;

“Treeincarnation Premium” by Green Waste Recycle Yard, Richmond, CA, 510-527- 3965, or equal.

1. Depth at Root Zone: 6 inch depth.

PART 3 - EXECUTION

3.01 GENERAL

A. Provide protection for existing landscape planting to remain including, but not limited to, trees, shrubs, and ground cover.

B. Contractor shall provide temporary protection suitable for the protection of the landscape planting immediately adjacent to the construction limit of work line, and as directed by the City Representative.

C. The Contractor shall coordinate all other trades and work.

D. Trees to be retained shall be enclosed by tree protection fencing on the work side when Tree Protection Zone is located inside, adjacent to, or within 10 feet of the limit of work, prior to demolition, grubbing, or grading.

E. Trees to be retained shall be pruned for clearance as required under supervision of a certified Arborist.

F. Temporary Protection shall be kept in place for the duration of the Project, maintained during construction, and temporarily relocated as required by the progress of the construction at no additional cost to the City.

3.02 PREPARATION

A. Stake the location of temporary protection barriers and fencing as noted above for the approval of the City Representative prior to installation of Temporary Protection fencing. Place location stakes at corners and ends and 30 feet on center maximum.

B. Notify the City Representative at least two weeks in advance of the date for on-site review of the staking.

C. Place 6 inches of organic mulch over existing grade within temporary protection fencing for existing trees to remain.

3.03 INSTALLATION

A. Install Temporary Protection for tree and landscape planting, as specified herein and as approved in the field by the City Representative. Install all other Temporary Protection in locations approved in the field by the City Representative.

1. Install posts at 10-foot intervals maximum, at corners, and at other changes in direction. Posts shall be set firmly in undisturbed soil, plumb and with a minimum of exposed height as specified. Securely attach fencing at a minimum of three points.

2. On pavement, provide self-supporting fencing that does not require anchorage into the pavement.

3. Install hay bales or rolls of erosion control wattling, secured around trunk to a height of 6 inches.

B. Fencing to be relocated closer to trees to remain to accommodate the sequence of construction shall be reviewed by the City Representative and Arborist prior to relocation. No removals or construction shall occur without the City Representative’s and Arborist’s approval of the new fence location.

C. Completely remove Temporary Protection, including foundations, associate materials and equipment at the completion of the Project or as directed by the City Representative.

D. Restore and recondition areas of site damaged or disturbed by barrier installation and removal.

3.04 PROHIBITED ACTIVITIES

A. The following are activities prohibited under existing tree canopies to remain and within protected landscape planting areas:

1. Excavating or trenching under tree canopies is prohibited and shall be permitted only under the following conditions:

2. When excavating or trenching within the canopy of trees to remain, the Owner shall be given 48 hours’ notice. Exercise extreme care during excavation to prevent damage to roots and in a manner that will cause minimum damage to the root system. Such work shall not occur without a professional arborist to perform compensatory root and branch pruning.

3. Prune injured roots cleanly. Backfill as soon as possible.

4. Where tunneling around roots is not practical, roots shall be cut off approximately 6 inches from construction.

5. Exposed roots shall not be allowed to dry out before permanent backfill is placed.

Temporary earth cover shall be provided, or exposed roots shall be packed with wet peat moss or four layers of wet untreated burlap and temporarily supported and protected from damage until permanently covered with backfill.

6. Thinning shall not remove more than 30 percent of the existing leaf surface.

7. Ripping or tearing of roots will not be allowed.

B. Placing backfill under protected trees unless indicated otherwise. Where fill is required for grading, and as indicated on the Drawings, do not fill above existing grade line at trunks. Fill soil must percolate at a rate of 1 inch per hour minimum.

C. Damage to trunk, canopy, or limbs caused by maneuvering of vehicles or equipment, or stacking of materials and equipment.

D. Driving or parking vehicles; storage of vehicles, equipment, or supplies.

E. Disposing of paint, petroleum products, dirty water, soil sterilant, concrete slurry or other deleterious materials on or around roots or on any landscape areas.

F. Changing site grades which cause drainage to flow into or to collect near protected trees.

G. Using protected trees as support posts, power poles, crane stays, signposts, or anchorage for ropes, guy wires, power lines, or other similar functions.

H. Damage to root system from flooding, erosion, excessive wetting or drying resulting from dewatering or other operations.

I. Excessive water or heat from equipment, utility line construction, or burning of trash under or near shrubs or trees.

3.05 REPLACEMENT OF DAMAGED LANDSCAPE PLANTING

A. Trees and plants destroyed or damaged beyond repair due to Contractor's negligence, failure to provide adequate protection, or failure to perform recommended selective pruning shall be compensated by the Contractor at no additional cost to the City.

1. Damage beyond repair that requires replacement shall be determined by the City Representative.

2. Replacement shall include the replacement plant material, transportation, installation, a 30-day maintenance period, and a one year warranty.

3. Planting location for replacements may be different from the original location and shall be determined by the City Representative.

B. Replace shrubs, ground cover and turf with plants similar in species, size and shape.

C. Replace trees with plants of same species, size and shape.

D. Replacements for trees of 2-to-8-inch caliper shall be replaced with similar sized plants; trees over 8 inch caliper shall be 60 inch box size.

E. Since age and size of existing tree may prohibit replacement with same size tree, the difference in caliper between size of damaged tree and replacement of tree shall be compensated by the Contractor.

F. Contractor shall fell trees to be removed so that trees to remain are not injured.

END OF SECTION

Precita Park Improvements Project 100% Construction Documents San Francisco, CA

SELECTIVE SITE DEMOLITION 02 41 13 - 1

SECTION 02 41 13 - SELECTIVE SITE DEMOLITION

PART 1 - GENERAL

1.1 DESCRIPTION

A. This SECTION describes the requirements to successfully complete demolition, clearing & grubbing to prepare site for new construction, including the following:

1. Demolition of selective site improvements, including its isolated foundations within limit of work.

2. Clean line saw cutting of existing asphalt pavement, concrete sidewalks, concrete curb/gutter, etc., as specified herein.

3. Clearing and site preparation. Including removal of site vegetation and other root system.

4. Salvage of existing items to be re-used, relocated or recycled.

5. Protection of existing items to remain.

6. Removal of surface debris and deleterious materials such as rubbish.

7. Abandonment and removal of utility pipes and structures as noted on plans.

8. Removal and stockpile of materials for landscaping use at approved location.

9. Disposal of unwanted materials off site.

10. Temporary erosion and sedimentation control measures.

1.2 REGULATORY REQUIREMENTS

A. All work shall be in accordance with the Geotechnical recommendations provided by the on-site field inspector.

1. No earthwork shall be performed for demolition until proposed work has been reviewed and approved by the Geotechnical Engineer.

B. City and County of San Francisco (CCSF) Department of Public Works Standard Specifications.

C. Comply with the following California Code of Regulations:

1. Title 8: CAL/OSHA, Chapter, Subchapter 4 – Construction Safety Orders.

2. Title 24: Part 2, California Building Code, Chapter 44, Protection of Pedestrian

SELECTIVE SITE DEMOLITION 02 41 13 - 2

during Construction or Demolition.

3. Bay Area Air Quality Management District.

D. Where conflict occurs between City and County of San Francisco Standard Specifications and Contract Documents or State regulations, conform to the most restrictive.

1.3 DEFINITIONS

A. Remove: Detach items from existing construction and legally dispose of them off-site unless indicated to be removed and salvaged or removed and reinstalled.

B. Remove and Salvage: Carefully detach from existing construction, in a manner to prevent damage, and deliver to Owner or Specified City Agency.

C. Remove and Reinstall: Detach items from existing construction, prepare for reuse, and reinstall where indicated.

D. Existing to Remain: Existing items of construction that are not to be permanently removed and that are not otherwise indicated to be removed, removed and salvaged, or removed and reinstalled.

1.4 SUBMITTALS

A. Proposed Protection Measures: Submit report, including drawings, that indicates the measures proposed for protecting individuals and property, for dust control and, for noise control. Indicate proposed locations and construction of barriers.

B. Schedule of Selective Demolition Activities: Indicate the following:

1. Detailed sequence of selective demolition and removal work, with starting and ending dates for each activity.

C. Pre-demolition Photographs or Video: Submit before Work begins.

1.5 SITE CONDITIONS

A. All civil design and plans are based on existing topographic survey and existing utility information received from owner. Contractor shall satisfy himself/herself as to the correctness of existing topography and other site conditions prior to construction. Notify and obtain written approval from design engineer and owner's representative of any discrepancies or revisions that is required as a result of such field investigation prior to commencement of work.

B. Notify Architect of discrepancies between existing conditions and Drawings before proceeding with selective demolition.

C. Commencement of work by the Contractor constitutes prima facie evidence of acceptance and knowledge of existing condition.

SELECTIVE SITE DEMOLITION 02 41 13 - 3

D. Conditions existing at time of inspection for bidding purpose will be maintained by Owner as far as practical.

1. Before selective demolition, Contractor to coordinate the removal, relocation or salvage of existing items on site, including but not limited to, the following and coordinate with the necessary utility agency prior to demolition.

a. All signage along all street frontages of proposed project.

b. Water meters, valve boxes, and cleanouts.

c. Gas meters, and valve boxes

E. Hazardous Materials:

1. If suspected hazardous materials are encountered, do not disturb; immediately notify Architect and Owner. Hazardous materials will be removed by Owner under a separate contract.

F. Storage or sale of removed items or materials on-site is not permitted.

G. Utility Service:

1. Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations, see Section 3.05.A.

2. If utility is noted to be abandoned, see Section 3.5.B

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with governing EPA notification regulations before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ANSI/ASSE A10.6 and NFPA 241.

C. Recycle (or salvage/re-use/donate) a minimum of 75% of all demolition waste but excluding land clearing debris. Recyclable materials include lumber, metals, cardboard, plastics, concrete, brush, and other materials.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Review record documents of existing construction provided by Owner. Owner does not guarantee that existing conditions are same as those indicated in record documents.

SELECTIVE SITE DEMOLITION 02 41 13 - 4

B. Survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

C. When unanticipated mechanical, electrical, or structural elements that conflict with intended function or design are encountered, investigate and measure the nature and extent of conflict. Promptly submit a written report to Architect.

D. Survey of Existing Conditions: Record existing conditions by use of measure drawings, and pre-construction photos and videos.

1. Inventory and record the condition of items to be removed and salvaged.

Provide photographs or video of conditions that might be misconstrued as damage caused by salvage operations.

2. Before selective demolition or removal of existing building elements that will be reproduced or duplicated in final Work, make permanent record of measurements, materials, and construction details required to make exact reproduction.

3.2 SITE PREPARATION

A. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

1. Comply with requirements for access and protection specified in SECTION

01 50 00 "TEMPORARY FACILITIES AND CONTROLS".

B. Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

1. Provide protection to ensure safe passage of people around selective demolition area and to and from occupied portions of building.

2. Restore damaged improvements to their original condition, as acceptable to property owners, at Contractor's expense.

3. Provide protection for persons passing around or through the area of demolition. Ensure free and safe passage of persons to and from occupied areas.

C. Temporary Shoring: Provide and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain, and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

1. Strengthen or add new supports when required during progress of selective demolition.

SELECTIVE SITE DEMOLITION 02 41 13 - 5

3.3 EXPLOSIVES

A. Do not use explosives.

3.4 BURNING

A. No burning of material will be allowed. Combustible material must be legally disposed of.

3.5 UTILITY SERVICES AND MECHANICAL/ELECTRICAL SYSTEMS

A. Existing Services/Systems to Remain: Maintain services/systems indicated to remain and protect them against damage.

1. Comply with requirements for existing services/systems interruptions specified in Division 01.

B. Existing Services/Systems to Be Removed, Relocated, or Abandoned: Locate, identify, disconnect, and seal or cap off indicated utility services and mechanical/electrical systems serving areas to be selectively demolished.

1. Contractor to arrange to shut off indicated utilities with utility companies.

2. If services/systems are required to be removed, relocated, or abandoned, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of building.

3.6 SELECTIVE DEMOLITION, GENERAL

A. Contractor to coordinate all demolition requirements and procedures with Owner and the appropriate Public Agency

B. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Do not use cutting torches until work area is cleared of flammable materials. At concealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression devices during flame-cutting operations.

2. Maintain adequate ventilation when using cutting torches.

3. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of off-site.

C. Removed and Salvaged Items.

SELECTIVE SITE DEMOLITION 02 41 13 - 6

1. Coordinate removal and salvage process with Owner and appropriate Public Agency.

2. Clean salvaged items.

3. Pack or crate items after cleaning. Identify contents of containers.

4. Store items in a secure area until delivery to Owner or appropriate Public Agency.

5. Protect items from damage during transport and storage.

E. Removed and Reinstalled or Relocated Items.

1. Clean and repair items to functional condition adequate for intended reuse.

2. Pack or crate items after cleaning and repairing. Identify contents of containers.

3. Protect items from damage during transport and storage.

4. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

F. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition. When permitted by Architect, Owner or Public Agency items may be removed to a suitable, protected storage location during selective demolition, and reinstalled in their original locations after selective demolition operations are complete.

1. Adjustment of manhole frames and other castings, see Specification Section 32 17 53 “Adjustment of Frames and Castings”.

3.7 SELECTIVE DEMOLITION PROCEDURES FOR SPECIFIC MATERIALS

A. Concrete Slabs-on-Grade: Saw-cut perimeter of area to be demolished, then break up and remove.

1. Chip concrete out at footings to support precast panels to remain. See structural Drawings for extent.

B. Asphalt Paving: Saw-cut perimeter of area to be demolished, then break up and remove. Contractor to maintain existing concrete sub-base unless otherwise indicated or directed by Owner.

3.8 POLLUTION CONTROLS

A. Observe environmental protection regulations.

SELECTIVE SITE DEMOLITION 02 41 13 - 7

B. Do not allow adjacent improvements to become soiled by demolition operations.

C. Dust Control: Protect the public from dust nuisance and property from dust damage.

The Contractor shall keep the entire site of the work, inclusive of vehicular and pedestrian traffic routes through the work, continuously free of dirt and dust by adequate periodic blading, power brooming, watering, applying dust pulliative or other approved means.

3.9 DISPOSAL OF DEMOLISHED MATERIALS

A. General: Except for items or materials indicated to be recycled, reused, salvaged, reinstalled, or otherwise indicated to remain Owner's property, remove demolished materials from Project site and legally dispose of them in an EPA-approved landfill.

1. Do not allow demolished materials to accumulate on-site.

2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Burning: Do not burn demolished materials.

C. Disposal: Transport demolished materials off Owner's property and legally dispose of them.

3.10 CLEANING

A. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

3.11 SELECTIVE DEMOLITION SCHEDULE

A. Existing Items to be Removed: See Demolition plans.

END OF SECTION 02 41 13

06/12/2025 12 93 00-1 Site Furnishings

SECTION 12 93 00

SITE FURNISHINGS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. The work specified in this section is the provision of all material, labor, equipment, and services necessary for furnishing and installing items, as shown on the Drawings and specified herein. The work includes but is not limited to:

1. Trash Receptacle

1.03 QUALITY ASSURANCE

A. Workmanship and materials: All workmanship and materials within this Section shall conform strictly to the manufacturer's specifications, installation instructions and guarantees.

1.04 SUBMITTALS

A. Submit per Section 013300, “Submittals,” and Standard Specifications.

1. Site Furnishings: Manufacturer’s literature, specifications, installation, maintenance manuals, footing instructions and warranties.

2. Paint: Four-inch square, or linear (where applicable) samples of each specified color, including powder coated metal colors.

B. Shop Drawings:

1. Horizontal and vertical layout of site furnishings; plan and section drawings to scale.

1.05 INSTALLER QUALIFICATIONS

A. Engage experienced subcontractors, with minimum 5 years of experience, for site furnishing installation. Approved subcontractors must have a proven record of installing site furnishing similar in material, design, and extent to that indicated for this Project and with a record of successful in-service performance.

1.06 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Site furniture shall be delivered in good condition in original unopened packages with labels intact and unloaded at job site in such a manner that no damage occurs to the product during hauling, handling or unloading at the job site.

B. Protect materials from adverse weather.

1.07 SUBSTITUTIONS, ADDITIONS AND DELETIONS

06/12/2025 12 93 00-2 Site Furnishings

A. General: Submit proposals for substitutions in accordance with the Specification 013300. Acceptance by the City Representative is required prior to proceeding with the work under this section.

1.08 SPECIAL TOOLS AND EQUIPMENT

A. Special Tools and Equipment:

1. Three sets of keys to operate any item specified with lock and key mechanism.

2. Extra cans of paint for touch of powder coat-colored furnishings; provide minimum one can of each color paint.

PART 2 PRODUCTS

2.01 GENERAL

A. The layout and design as shown on the Plans are based on products currently available from the manufacturers listed below. Products of other manufacturers will be considered if equal, provided that the Contractor shall be responsible for extra costs or delays associated with making necessary changes in design or layout to accommodate the proposed substitutions.

B. Provide site furniture as follows or equal:

a. Trash Receptacle (Qty. 1) Mfr: Landscape Forms

Model: Poe side opening (RPD Standard) Color: Black

PH: 269-276-4424

www.landscapeforms.com

PART 3 EXECUTION

3.01 LAYOUT OF SITE FURNISHINGS

A. Layout: Layout site furnishings according to the locations shown on the drawings.

B. Adjustments: The City Representative reserves the right to make adjustments in the locations of site furnishings without additional cost to the City.

C. Final Layout: Notify the City Representative to approve the final layout of furnishings prior to installation.

3.02 PROTECTION

A. Protect site furnishings during the construction period to prevent damage and wear.

3.03 REPLACEMENT

06/12/2025 12 93 00-3 Site Furnishings

A. Replace all defective or damaged site furnishings prior to acceptance.

3.04 INSTALLATION

A. Installation procedures shall be according to manufacturer's directions.

B. All components of the equipment shall be installed accurately to produce true plumb and level installation.

C. Clean-up: Prior to final inspection and acceptance, remove all rubbish and excess material for disposal as approved, and leave area in a neat, satisfactory condition.

06/12/2025 31 13 00 Selective Tree & Shrub Removal and Trimming

SECTION 31 13 00

SELECTIVE TREE AND SHRUB REMOVAL AND TRIMMING

PART 1 - GENERAL

1.01 DESCRIPTION

A. Provide all material, labor, equipment, and service necessary for tree removal and pruning as shown on the Drawings and as specified herein. The work of this Section includes but is not limited to:

1. Removal of existing trees and stumps

1.02 RELATED SECTIONS

1. Section 015639 Protection of Trees

2. Section 329000 Planting

1.03 REFERENCE STANDARDS

All work shall comply with:

a. American National Standards Institute (ANSI). 2006. Safety Requirements for arboricultural Operations (Z133). New York NY.

b. American National Standards Institute (ANSI). 2008. American National Standard for tree care operations – Tree Shrub and Other Woody Plant Maintenance – Standard Practices (A300 Part 1): Pruning. New York NY.

c. Gilman, E. 2012 An Illustrated Guide to Pruning. 3rd edition. Delmar. Clifton Park NY.

d. Gilman, E. and S. Lilly. 2006. Best Management Practices: Tree Pruning. 2nd edition.

International Society of Arboriculture. Champaign IL.

e. Harris, Richard W., James Clark and Nelda Matheny, 2004. ARBORICULTURE: The Integreated Management of Landscape Trees, Shrubs and Vines. 4th. Englewood Cliffs, NJ: Regents/Prentice Hall.

f. Matheny, N. and Clark, J. 2000. TREES AND DEVELOPMENT: A TECHNICAL GUIDE

TO PRESERVATION OF TREES DURING LAND DEVELOPMENT. Champaign, IL:

International Society of Arboriculture.

g. City and County of San Francisco, Urban Forest Council. 2006. Pruning Standards.

h. City and County of San Francisco, Department of Public Works, Bureau of City

Representativeing, 1986. STANDARD SPECIFICATIONS (DPWSS). Section 1007 Planting, Section 1008 Maintenance and Plant Establishment.

1.04 SUBMITTALS

A. Product Data: For each type of product indicated and proposed.

B. Qualification Data: For firms and persons specified in 1.05 A, "Quality Assurance", of these specifications, to demonstrate their capabilities and experience. Include lists of four completed San Francisco Bay region projects with project names and addresses and names and addresses of architects and owners. Provide a copy of Contractor’s specialty class C61-D49 Contractor’s License.

C. Pruning Method: The Contractor shall submit a written description for review and approval of proposed pruning method of trees.

D. Temporary Fencing: See Specification Section 01 56 39 “Temporary Tree and Plant

Protection”.

1.05 QUALITY ASSURANCE

A. Tree Service Qualifications: Contractor performing tree work shall posess a valid specialty class C61-D49 Contractor’s License. An experienced and professional tree service firm that has successfully completed tree removal and pruning work similar to that required for this Project.

B. Preconstruction Meeting: Conduct meeting at Project site to comply with requirements in

Section 013119 "Project Meetings."

1. Prior to start of construction the Contractor to conduct a meeting with the Resident City Representative and RPD Urban Forestry Supervisor to review tree work.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Temporary Fencing: See Section 01 56 39 “Temporary Tree and Plant Protection”.

B. Pre-Emergent Herbicide: See Section 32 90 00 “Planting.”

C. Water: Clean, potable and free of deleterious matter. Source, in accordance with regulations and codes governing water conservation measures for the City and County of San Francisco.

PART 3 - EXECUTION

3.01 PREPARATION

A. Temporary Fencing: See Section 01 56 39 “Temporary Tree and Plant Protection”.

B. Inspection for bird/nests during bird nesting season: If tree work will be performed during bird nesting season (January 15 through August 15), a Certified Biologist must be obtained by the Contractor to provide an nesting inspection for the trees to be affected during construction work.

1. If active nests are identified by the Biologist, no work may occur at that tree or surrounding area: A 100-foot exclusion buffer of temporary fencing shall be erected around the tree with the active nest, and no work may occur within the 100-foot buffer until the Biologist has verified that young birds have left the nest and that active nesting has been completed.

C. Wood Chip Mulch: If temporary haul or access roads must pass over root area, provide 4 to 6-inch mulch over filter fabric to cover root area of trees if. Approved chippings from removed trees may be used. Remove wood chips after completion of work, as directed.

D. Do not allow fires under or adjacent to remaining trees or other plants.

E. Make provisions for salvaging and disconnecting, capping and temporarily supporting any irrigation lines as directed by City Representative.

3.02 BACKFILLING AND REGRADING

A. Backfill holes and depressions with approved site soil or imported topsoil. Compact dampened soil to 85 percent. Water to settle. Add soil and grade to conform continuously to adjacent existing grades.

3.03 TREE REMOVAL,STUMP REMOVAL AND TREE PRUNING

F . Removal of trees / stumps:

1. For trees/stumps to be removed in areas of new path alignments or where paving, footings, foundations, piers, or other new structures are to be installed, grind stumps to 24” (minimum) below finish grade and to depth sufficient to allow new proposed construction. Backfill voids with approved backfill and topsoil per the Specifications.

2. For other trees/stumps to be removed, cut stump flush to finish grade and immediately apply approved herbicide* (Garlon 4) to prevent re-sprouting. If herbicide will not be applied immediately, leave greater amount of trunk above grade, and make the final cut immediately prior to applying herbicide. Additionally grind any surface roots 12” below grade.

3. *Approved pesticide shall be per the CCSF Integrated Pest Management Reduced Risk Pesticide List.

4. Cut and re-apply approved herbicide as needed in the event of re-sprouting.

5. Remove excess topsoil or sandy fill as required to complete finish grades as shown on plans.

3.04 TREE REPAIR AND REPLACEMENT

A. Repair trees damaged by construction operations within one week of damage. Treat damaged trunks, limbs, and roots as directed City Representative. Aerate, water and mulch as directed by City Representative.

C. Aerate surface soil compacted during construction, 10-feet beyond drip line and no closer than 36-inches to tree trunk. Drill 2-inch diameter holes a minimum of 12- inches deep at 24-inches on center. Backfill holes with an equal mix of augered soil and sand. Deep-root water or as directed by City Representative.

3.05 CHIPPING, SALVAGING AND DISPOSAL OF WASTE MATERIALS

A. Burning is not permitted.

B. Any tree material indicated to be removed on the Drawings, or encountered during clearing/grubbing operations, MUST BE offhauled and disposed of as Contractor’s Property.

C. Disposal: Remove excess excavated material, trees, and tree parts as Contractor’s property or as directed.

EXCAVATION & FILL 31 23 00 - 1

SECTION 31 23 00 - EXCAVATION & FILL

PART 1 - GENERAL

1.1 DESCRIPTION

A. This SECTION describes the requirements for earthwork operation, as shown on the Drawings and specified.

1. Preparing sub-grades for walkways, pavements, structures and landscaping.

2. Excavating and backfilling for buildings and structures, pile-supported and non-pile supported.

3. Sub-base course for concrete walks and pavements.

4. Base course for concrete paving.

5. Excavating and backfilling trenches for utilities and pits for buried utility structures.

6. Drainage course for concrete slabs-on-grade.

1.2 REGULATORY REQUIREMENTS

A. All work shall be in accordance with the Geotechnical recommendations provided by the on-site field inspector.

1. No earthwork shall be performed until proposed work has been reviewed and approved by the Geotechnical Engineer.

B. City and County of San Francisco (CCSF) Department of Public Works Standard Specifications.

C. ASTM D1557-70 for testing compaction.

D. State of California, Department of Transportation Standard Specifications (CSS).

E. Access for Persons with Disabilities: Comply with California Building Code and Americans with Disabilities Act Accessibility Guidelines (ADAAG) for site development, walks, and sidewalks to ensure access for persons with disabilities.

F. Where conflict occurs between City and County of San Francisco Standard Specifications and Contract Documents or State regulations, conform to the most restrictive.

EXCAVATION & FILL 31 23 00 - 2

1.3 RELATED DOCUMENTS

A. Related Sections:

1. Specification Section 02 41 13 “Selective Site Demolition”.

1.4 DEFINITIONS

A. Backfill: Soil material or controlled low-strength material used to fill an excavation.

1. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

2. Final Backfill: Backfill placed over initial backfill to fill a trench.

B. Base Course: Aggregate layer placed between the sub-base course and paving.

C. Bedding Course: Aggregate layer placed over the excavated sub-grade in a trench before laying pipe.

D. Borrow Soil: Satisfactory soil imported from off-site for use as fill or backfill.

E. Drainage Course: Aggregate layer supporting the slab-on-grade that also minimizes upward capillary flow of pore water.

F. Degree of Compaction: The ratio, expressed as a percentage, of the dry density of the fill material as compacted in the field to the maximum dry density of the same material as determined by ASTM Test Designation D 1557.

G. Excavation: Removal of material encountered above sub-grade elevations and to lines and dimensions indicated.

1. Authorized Additional Excavation: Excavation below sub-grade elevations or beyond indicated lines and dimensions as directed by Architect. Authorized additional excavation and replacement material will be paid for according to Contract provisions for changes in work.

2. Unauthorized Excavation: Excavation below sub-grade elevations or beyond indicated lines and dimensions without direction by Architect. Unauthorized excavation, as well as remedial work directed by Architect, shall be without additional compensation.

H. Fill: Soil materials used to raise existing grades.

I. Rock: Rock material in beds, ledges, unstratified masses, conglomerate deposits, and boulders of rock material 1 cu. yd. or more in volume that exceed a standard penetration resistance of 100 blows/2 inches when tested by a geotechnical testing agency, according to ASTM D 1586.

EXCAVATION & FILL 31 23 00 - 3

J. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below the ground surface. These structures are either pile-supported or non-pile-supported and have different criteria depending on the occurrence.

K. Sub-base Course: Aggregate layer placed between the sub-grade and a cement concrete pavement or a cement concrete walk.

L. Sub-grade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below sub-base, drainage fill, drainage course, or topsoil materials.

M. Utilities: On-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

1.5 SUBMITTALS

A. Product Data: For each type of the following manufactured products required:

1. Warning Tape

2. Impermeable membranes, anchorage and related accessories

B. Qualification Data: For qualified testing agency.

C. Material Test Reports: For each on-site and borrow soil material proposed for fill and backfill as follows:

1. Classification according to ASTM D 2487.

2. Laboratory compaction curve according to ASTM D 1557.

D. Pre-excavation Photographs or Videotape: Show existing conditions of adjoining construction and site improvements, including finish surfaces that might be misconstrued as damage caused by earth moving operations. Submit before earth moving begins.

1.6 QUALITY ASSURANCE

A. General: All Work shall be done to the satisfaction of the designated representative of the Geotechnical Engineer. The Contractor shall notify the Geotechnical Engineer and City at least 48 hours prior to performance of any site earthwork.

B. Pre-excavation Conference: Conduct conference at Project Site. Review earthwork procedures and responsibilities including testing and inspection procedures and requirements. Notify participants at least 7 working days prior to convening conference.

Record discussions and agreements and furnish a copy to each participant.

C. Testing and Inspection Service: The Owner shall perform necessary inspection and compaction tests to ensure compliance with this Specification and the Geotechnical Report.

EXCAVATION & FILL 31 23 00 - 4

Additional tests of on-site soil, as outlined in the Geotechnical Memorandum and contained herein, shall be performed by the Contractor.

D. Perform the work of this Section in compliance with applicable requirements of all governmental agencies having jurisdiction, and the requirements and recommendations of the Soils Report.

E. Compaction: Percentage of compaction specified shall be the minimum acceptable. The percentage represents the ratio of the dry density of the compacted material to the maximum dry density of the material as determined by the procedure set forth in ASTM Designation D1557, latest edition. Tests for compaction shall be made in accordance with test procedures outlined in ASTM D1557-70.

F. Finish surface of the non-paved area shall not vary more than 0.10 feet from that called for on the plans or detail drawings, and not vary more than ¼-inch for area under proposed pavement.

G. Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and completely familiar with the specified requirements and the methods needed for proper performance of the specified work.

H. Use equipment in adequate size, capacity and numbers to accomplish the specified work in a timely manner.

I. Except as modified by the requirements herein or indicated on the Drawings, earthwork shall conform to the applicable requirements of the following codes and standards. Nothing contained herein shall be construed as permitting work that is contrary to code requirements.

1.8 SITE CONDITIONS

A. Survey existing conditions and correlate with drawings and specifications to determine the extent of demolition required. Any discrepancies are to be brought to the attention of the Architect prior to commencement of work.

B. Commencement of work by the Contractor constitutes prima facie evidence of acceptance, and knowledge of existing conditions.

C. Contractor shall maintain and protect all utility service for facilities that are to remain operational at all time. Coordinate all down time with Owner and submit phasing drawings for owner’s approval prior to any demolition.

D. Traffic: Minimize interference with adjoining roads, streets, walks, and other adjacent occupied or used facilities during site-clearing operations.

1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction.

EXCAVATION & FILL 31 23 00 - 5

2. Provide alternate routes around closed or obstructed traffic ways if required by Owner or authorities having jurisdiction.

E. Existing Utilities: Where existing utilities not shown on the drawings are encountered;

support, shore, protect, and immediately notify the Project Manager and Project Inspector.

Notify the owner of any potential interruptions to the existing utilities serving the facilities occupied in writing five working days prior to commencement of work and only after acceptable temporary utility services have been provided.

1. Specific attention is to be made to the signal and power conduits to the existing main gate and to the outlying sheriff’s building.

F. Do not commence earthwork operations until temporary erosion and sedimentation controls, and tree protection measures are in place.

G. In the event there are any unforeseen above grounds or subsurface conditions encountered that affect design or function of project, investigate fully and submit an accurate, detailed, written report to the Architect or Owner.