Attachment1.pdf

44 TRAILS HUB TRAILHEAD VAULT TOILET INSTALLATION AND BENNETT PASS SNOW-PARK VAULT

TOILET RELOCATION

Mt. Hood Na�onal Forest

Table of Contents

SECTION 011000 – SUMMARY

SECTION 001200 MOBILIZATION

SECTION 02060 DEMOLITION

SECTION RELOCATION

SECTION 02 10 00 SITE PREPARATION

SECTION INSTALLATION

SECTION 02 10 00 SITE PREPARATION

SECTION 131290 PRECAST CONCRETE TOILET BUILDING

SECTION 011000 – SUMMARY

GENERAL

1.01 PROJECT BACKGROUND

A. The Hood River Ranger District, located on the Mt. Hood Na�onal Forest, is reques�ng one double vault style concrete toilet. This toilet to include raptor protec�on screen on vent stack, grab bars, toilet paper bar, door sweeps, signage, and door closer. This toilet will be placed at 44 Trails Hub Trailhead, a high eleva�on site where snow load and impact poten�al are significant.

Construc�on of this toilet needs to be of the highest strength and quality. Incoming toilet will be placed adjacent to the trailhead name sign and three panel informa�on kiosks to the right as viewed from gravel parking lot. Loca�on will be staked and painted on ground.

B. The Hood River Ranger District is also reques�ng the reloca�on of the exis�ng single CXT vault toilet from Bennet Pass Sno-park to Polallie trailhead. Loca�on will be staked and painted on ground. Distance is approximately 10 miles along the Hwy 35 corridor. Excava�on of the current toilet building and underground vault at Bennet Pass will be required in addi�on to excava�on of the new hole and placement of the exis�ng vault and toilet building at Polallie Trailhead.

Careful handling of the vault is required to prevent damage to the structure. The old vault hole at Bennet Pass Sno-park is to be filled in with na�ve soil and rock covered with ¾” minus gravel to a depth of 6”. The size of the hole to fill is approximately 7’ wide X 15’ long x 5’ deep. The material must be brought in from an outside source. Metal snowplow bollards must be removed from the Na�onal Forest as well.

1.02 PROJECT LOCATION

A. Direc�ons

1. 44 Trails Hub Trailhead - From Hood River, Oregon via Hwy 35 travel southeast approximately 25 miles to Forest Road 44, then East on Forest Road 44 for 5 miles to Forest Road 17, North on Forest Road 17 to Forest Road 1700-690 to the 44 trails hub.

i. Coordinates: 45.418963, -121.527820

2. Bennet Pass Sno-park - From Hood River, Oregon travel Hwy 35 south approximately32 miles to the Mt Hood Meadows/Bennet Pass exit. Le� at the stop sign 1/10 mile into Sno-park road.

i. Coordinates: 45.310251, -121.642233

3. Polallie Trailhead - From Hood River, Oregon travel Hwy 35 south approximately 22 miles, trailhead will be on le� and is well signed on highway.

i. Coordinates: 45.417657, -121.570120.

1.03 SCOPE OF WORK

A. The work involves installa�on of new toilet at 44 Trails Hub Trailhead, and reloca�on of Bennet Pass toilet to Polallie Trailhead.

B. State Compliance Requirements:

1. U.S. Forest Service management policies require that all construc�on comply with state and local building codes, na�onal standards, and federal design requirements, including standards set by the State Health Department, Water Resources, Ecology Departments, Divisions of Environmental Quality, in the State which the work is located, and USEPA.

C. The Contractor shall furnish all labor, materials, tools, equipment, transporta�on, and management to provide the described tasks.

D. The contractor shall obtain all necessary permits from the Oregon Department of Environmental Quality prior to commencement of work.

E. Remove waste materials from Project site and legally dispose of them in a landfill or incinerator acceptable to authori�es having jurisdic�on.

1.04 CONTRACTOR USE OF PREMISES

A. On-Site Work Hours:

1. Limit work to normal business working hours of 8:00 a.m. to 5:00 p.m., Monday through

Friday, unless approved by the CO.

B. Confine storage of materials to areas approved by the CO.

C. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construc�on opera�ons. Contractor shall minimize disturbance of all undisturbed areas.

D. Keep walkways, roadways, and entrances clear and available to the Government, Government employees, emergency vehicles and the public. Do not use these areas for parking or storage of materials.

E. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with COR and remove agreed-on roots and branches that interfere with construc�on.

F. U�li�es

1. There is no electricity available.

2. There are no sanitary services available.

3. There is no water available.

1.05 PERIOD OF PERFORMANCE

A. The contractor shall complete the work within 120 days of the issued no�ce to proceed.

1.06 BASIS OF PAYMENT

A. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

0001 Furnish and Install Double Lump Sum

Stall Concrete Vault Toilet Building

0002 Move Single stall CXT toilet Lump Sum from Bennet Pass snow park to Polallie trailhead and install

B. All materials, labor, and miscellaneous items not specifically called out in the pay items shall be included as incidental work.

END OF SECTION 01100

SECTION 001200 MOBILIZATION

1.01 SUMMARY

A. This work shall consist of preparatory work and opera�ons necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and opera�ons that must be performed or that cause costs to be incurred prior to beginning work on the various items on the project site.

B. This work includes providing project site fire protec�on equipment, addi�onal personnel and supplies for construc�on ac�vi�es during fire hazard restric�ons as required by Forest Service.

C. This work includes construc�on staking, equipment, �me, and labor needed to layout new precast concrete toilets, for approval prior to construc�on. Make any adjustments to construc�on staking a�er review from CO.

PRODUCTS (NOT USED)

EXECUTION (NOT USED)

END OF SECTION 001200

SECTION 02060 DEMOLITION

A. The work of this Sec�on consists of removing the CXT from Bennet Pass Sno-park.

B. Back fill hole le� from removal of CXT from exis�ng loca�on.

C. Coordinate with all par�es involved to ensure that open excava�ons are filled as quickly as possible to prevent safety hazards.

1.02 RELATED SECTIONS

A. 021000 Site Prepara�on B. 131290 Precast Concrete Toilet Building

1.03 SCHEDULING

A. Schedule work to coincide with the installa�on of the new toilet building and minimize the down �me of the recrea�on site.

EXECUTION

3.01 PREPARATION

A. Provide, erect, and maintain temporary barriers and security devices around work site. The Contractor shall be responsible for always maintaining safety barricades around all open excava�ons during the Contract.

B. Protect site improvements not designated for removal.

3.02 DEMOLITION

A. Cut exis�ng asphalt around exis�ng CXT to allow room for excava�on and removal of toilet.

B. Excavate around the building and vault tank as needed to remove them, without causing unnecessary damage to the surrounding landscape or other site improvements.

C. Remove en�re building structure including foo�ngs, concrete vault tank, and their appurtenances, and pavement.

D. Fill in abandoned hole with na�ve soil and rock. Material must be brought in from outside source ,weed free. Rock to be ¾ minus at 6-inch depth. Size of the hole approximately 7 feet wide x 15 feet long x 5 feet deep.

E. Finish grade and compact areas affected by demoli�on to maintain site grades and contours.

F. Do not burn or bury materials on site except for materials designated by the COR as suitable for fill.

G. Leave site in a clean condi�on at the end of each workday.

End of SECTION 02060 DEMOLITION

SECTION RELOCATION

General

A. Move CXT toilet from Bennet Pass Sno-park to Polallie Trailhead.

1.02 EXECUTION

A. Provide correct moun�ng plates and nuts to atach webbing from crane to building.

B. Provide transport vehicle for both building structure and vault.

C. Provide crane capable of li�ing 29,000 lbs.

D. Li� exis�ng CXT toilet building as one unit, if possible, from current loca�on onto transport vehicle. Li� Vault from current loca�on onto transport vehicle.

E. Follow demoli�on specifica�on sec�on 3.02 (D) fill in abandoned hole with na�ve soil and rock covered with ¾” minus gravel to a depth of 6”. The size of the hole to fill is approximately 7’ wide X 15’ long x 5’ deep. The material must be brought in from an outside source, weed free.

F. Bennet Pass Building Specs

Vault

Height: 4’ 4”

Width: 6’ 6”

Length: 14’ 7½”

Weight: 17,400 lb.

Building

Weight: 28,600

Width: 8’ 6”

Length: 15’ 2¾”

Height: 11’ 6”

End of Reloca�on Sec�on

SECTION 02 10 00 SITE PREPARATION

1.01 DESCRIPTION

A. This sec�on includes labor, materials, equipment and provisions for clearing, grubbing, disposal of all objec�onable material, and related work necessary to prepare Polallie Trailhead for the new toilet buildings.

1.02 RELATED SECTIONS

A. 02060 Demoli�on

1.03 COORDINATION

A. Coordinate with COR to close Sno-park and Trailhead parking lots for days of construc�ons.

B. Coordinate with COR project start date to have the vault pumped and washed prior to moving.

1.04 PROPERTY PROTECTION

A. All structures whether inside or outside the project limits, shall be protected from damage or interrup�on by the Contractor's ac�vi�es. Responsibility for safety, protec�on of kiosks and trees near or in the project limits are the Contractor's. The Contractor shall repair or replace damaged structures, and/or proper�es to the sa�sfac�on of the Government.

1.05 REQUIRED SUBMITTALS

A. Pollu�on and Erosion Control Plan (Include if construc�on is during wet weather season all ditches are dry during the Summer and convey storm water drainage only) including Best Management Erosion Control procedures as set forth in this specifica�on: Submit plan and receive approval prior to the beginning of excava�on.

3.01 CLEARING AND GRUBBING

A. Por�ons of the project site where excava�on is to be made shall be cleared of all objec�onable material such as trees, brush, stumps and roots, grass and other vegeta�on, decayed vegetable mater, topsoil, rubbish, pavement, and other materials that may interfere with the proper execu�on of the work.

B. No vegeta�on or debris shall be covered or filled or be a part of any structural embankment.

3.02 SITE RESTORATION

A. Site restora�on shall include na�ve soil and ¾ minus gravel restore them to exis�ng condi�on.

3.03 DISPOSAL OF WASTE MATERIAL

A. Demolished and non-organic waste material including concrete and pavement shall be disposed of by the Contractor off Na�onal Forest Lands and in accordance with all federal, state, and local regula�ons.

B. Disposal site(s) shall be field located with Contrac�ng Officer within 3 miles from project site for organic debris and larger rock / na�ve soil unsuitable / excess for backfill. Contractor shall load, haul, and spread to uniform grade and compact material. Refer to Detail.

C. Contractor shall control dust at the site with water or approved dust inhibitor.

END OF SECTION 02 10 00 SITE PREPARATION

SECTION INSTALLATION

1.01 Summary

A. This sec�on pertains to the installa�on of the exis�ng toilet being moved from Bennet Pass to Polallie trailhead.

B. See sec�on 131290 Precast Concrete Toilet Building for installa�on instruc�ons for 44 Trails Hub toilet.

1.02 Products

A. Bedding material to be sand or 3/8” minus crushed or screened aggregate.

B. Caulking between vault and toilet floor to be 1” x 1” butyl tape designed specifically to bond precast concrete to precast concrete.

1.03 Installa�on

A. Excavate for the installa�on of the toilet vault to a depth that will allow the structure site to be free draining a�er installa�on is completed. Allow for a 2” leveling course beneath the toilet vault. Stockpile topsoil in a separate pile at sites.

B. Finish floor eleva�on is 4-6” above natural grade measured at the front (entrance) of the exterior slab unless otherwise approved by the customer. Ideally, the back of the building should be slightly higher to allow water to freely drain out of the toilet rooms.

C. The Government may specify a finish floor eleva�on for buildings at some sites. The contractor will install buildings at these sites with the floor eleva�on within a plus or minus 0.05’ of the specified floor eleva�on.

D. The hole dug to accommodate the vaults must be large enough to be workable and to allow the floor to the building to fit on the vaults when placed, but small enough to avoid excessive backfill a�er placement (use your own judgement). Compact the natural ground at the botom of the vault excava�on with a minimum of three passes with a wacker-type mechanical compactor or equivalent approved by the customer.

E. Install aggregate bedding material for building support. Compact aggregate course with two passes with a wacker-type mechanical tamper or equivalent approved by the customer. Install leveling course of sand so there will be no high spots in the middle of the vault botom. Set vault in place. Ideally, the containment area end of the vault should be slightly higher; ¼” per foot of run to allow the building to sit higher. Ensure vault is level, side to side. Backfill around the structure. Use excavated material for backfill, rocks larger than 6” in maximum dimension shall not be placed within 6” of the exterior vault walls. Fill, adjacent to the building entry will have excavated material placed in 8” loose li�s and compacted with a minimum of two (2) passes with a wacker-type mechanical compactor or equivalent approved by customer. A�er the vault is placed in the hole and backfilled, place the supplied butyl tape around the en�re top surface of the vault. The area must be free of debris.

END INSTALLATION SECTION

SECTION 02 10 00 SITE PREPARATION

1.01 DESCRIPTION

A. This sec�on includes labor, materials, equipment and provisions for clearing, grubbing, demoli�on, disposal of all objec�onable material, and related work necessary to prepare the site for the new toilet buildings.

B. This sec�on pertains to the new toilet construc�on located at the 44 Trails Hub.

1.02 RELATED SECTION

1.03 COORDINATION

A. The Contractor is responsible for loca�ng all u�li�es that may be impacted and or damaged by construc�on.

B. The Contractor shall coordinate his opera�ons with the Government and u�li�es likely to be impacted by his construc�on.

C. The Contractor shall be responsible for coordina�ng his ac�vi�es with affected u�li�es and property owners and other adjacent contractors. No addi�onal costs are allowed for delays resul�ng from a lack of such coordina�on by the Contractor.

1.04 PROPERTY PROTECTION

A. All structures, whether inside or outside the project limits, shall be protected from damage or interrup�on by the Contractor's ac�vi�es. Responsibility for safety, protec�on of buildings and trees near or in the project limits are the Contractor's. The Contractor shall repair or replace damaged structures, u�li�es, and/or proper�es to the sa�sfac�on of the Government.

1.05 REQUIRED SUBMITTALS

A. Pollu�on and Erosion Control Plan (Include if construc�on is during wet weather season all ditches are dry during the Summer and convey storm water drainage only) including Best Management Erosion Control procedures as set forth in this specifica�on: Submit plan and receive approval prior to the beginning of excava�on.

3.01 CLEARING AND GRUBBING

A. Por�ons of the project site where excava�on is to be made shall be cleared of all objec�onable material such as trees, brush, stumps and roots, grass and other vegeta�on, decayed vegetable mater, topsoil, rubbish, pavement, and other materials that may interfere with the proper execu�on of the work.

B. No vegeta�on or debris shall be covered or filled or be a part of any structural embankment.

3.02 SITE RESTORATION

A. Site restora�on shall include topsoil and seeding with all disturbed areas as required to restore them to exis�ng condi�on. All disturbed structures shall be reinstalled and/or replaced to match exis�ng condi�on, including but not limited to asphalted surfaces, paved or concrete walkways and driveways, graveled and/or landscaped surfaces, fencing, and any other structures encountered during the performance of the work.

3.03 DISPOSAL OF WASTE MATERIAL

A. Demolished and non-organic waste material including piping, asphalt and concrete pavement shall be disposed of by the Contractor off Na�onal Forest Lands and in accordance with all federal, state, and local regula�ons.

B. Disposal site(s) shall be field located with Contrac�ng Officer within 3 miles from project site for organic debris and larger rock / na�ve soil unsuitable / excess for backfill. Contractor shall load, haul, and spread to uniform grade and compact material. Refer to Detail.

END SECTION 02 10 00 SITE PREPERATION

SECTION 131290 PRECAST CONCRETE TOILET BUILDING

A. The work consists of supplying and installing a new precast concrete toilet building.

B. Contractor responsibili�es include clearing and grubbing, excava�ng, bedding prep, transporta�on / loading / unloading / installa�on of the toilet building and vault, backfilling, site grading and cleanup.

1.02 RELATED SECTIONS

B. 021000 Site Prepara�on

1.03 SUBMITTALS

A. Stamped, engineered drawings of the proposed toilet building, provided by the manufacturer.

B. Color samples for colored concrete to be used on the toilet building roof panels, walls, and screen panels.

C. Cer�fica�on from supplier that bedding material meets the grada�on specified.

D. Building installa�on manual.

1.03 DELIVERY AND HANDLING

A. Contractor shall coordinate with the building manufacturer to schedule the delivery and placement of the precast concrete building.

B. No�fy the Contrac�ng Officer (CO) at least one week in advance of the scheduled delivery date.

C. Building shall be handled and installed according to the manufacturer’s installa�on instruc�ons.

PRODUCTS

2.01 TOILET BUILDING AND VAULT

A. Precast Toilet building – Double vault double stall

1. Manufacturer must be ISO 9001 cer�fied at the �me of bid.

2. Manufacturing plant must be PCI cer�fied at the �me of bid.

3. 28-day compressive strength of concrete must be a minimum of 4500 psi.

4. UL 752 Bullet Resistance on 4” thick concrete samples.

5. Designed to withstand a 350 pounds per square foot snow load, 400 pounds per square foot floor load, 150 mile per hour (3-second gust) wind exposure C, and seismic design category E earthquake.

6. All wall to floor interior surface seams shall have a minimum 1” radius coving made of high strength grout.

7. The vault shall have a botom slope of 1” per foot from under the toilet riser out to the outside cleanout area.

8. The vault shall have a 24” diameter (minimum) lightweight manhole cover installed to the rear or side of the building. The manhole cover shall be raised, with the surrounding concrete sloped away using a minimum slope of ½” per foot.

9. Two 12” diameter round pipes (one each for men’s and women’s side) shall be installed to vent the vault and the pipe shall be raised a minimum of 3’ above the highest point of the roof.

10. Designed to meet the requirements of the American with Disabili�es Act Requirements and Uniform Federal Accessibility Standards, including 60” turning radius inside toilet room.

11. All reinforcing steel shall conform to ASTM A615. All welded wire fabric shall conform to

ASTM A185.

12. Weatherproofing sealer for exterior of building will be a clear water repellent penetra�ng sealer.

13. Interior and exterior joints shall be caulked with a paintable polyurethane sealant.

14. Grout shall be a non-shrink type and will be painted to match the color of surrounding concrete as nearly as possible.

15. Interior floors shall be finished with a 2-component, catalyzed, water borne polyamide epoxy with a micronized polymer addi�ve to provide uniform slip resistant texture. The color will be gray.

16. Interior walls and ceilings shall be finished with a modified acrylic, water repellent penetra�ng stain. The color will be white followed by a clear acrylic an�-graffi� sealer.

17. Exterior walls and roof shall be finished with a water repellent penetra�ng stain in the same color as the walls or roof followed by a clear acrylic an�-graffi� sealer.

18. Grab bars shall be 18-gauge, type 304 stainless steel with 1½” clearance. Grab bars shall each be able to withstand 300-pound top loading.

19. Doors and accessories:

a. Doors shall be steel.

b. Doors shall be flush panel type 1¾” thick, minimum 16-gauge galvanized steel, top painted with DTM ALKYD.

c. Door frames shall be knockdown or welded type, single rabbet, minimum 16-gauge prime coated steel top painted with DTM ALKYD, width to suit wall thickness.

d. Three (3) rubber door silencers shall be provided on latch side of frame.

e. Door hinges shall be three (3) per door with dull chrome pla�ng 4½” x 4½” adjustable tension, automa�c closing for each door.

f. Lockset shall meet ANSI A156.2 Series 4000, Grade 1 cylindrical lockset exterior door; lever handle both inside and out; U.S. 26D finish.

g. Deadbolt shall be cer�fied ANSI/BHMA A156.5-2001 Grade 1. Heavy duty tamper resistant. 2¾” backset. U.S. 26D finish

h. Double coat hook shall be 304 stainless steel 16-gauge (1.5mm), formed construc�on with a sa�n finish and have ³̷₁₆” x ⅞” nail in anchor. Upper hook will extend at least 2½” from the wall. Lower hook will extend at least 1¼” from the wall.

i. Door sweep shall be provided at the botom of door and be an adjustable brush type.

20. Wall vent shall be cast into the concrete wall. The unit’s frame shall be C3 x 4.1 channel steel. The louver frame and louvers shall be 18-gauge zinc coated steel with baked enamel finish. Vent to include an insect screen.

21. Plate for vault cleanout cover shall be ¼” thick diamond plate steel. Lid shall be hinged and configured so that it can be locked with a padlock. A gasket will be provided around the en�re perimeter of the lid to provide an air�ght seal.

22. Polyethylene vault liner made of a Roto molded 8460 polyethylene; holds up to 1,000 gallons of waste or 15,000 uses per vault.

2.02 SOIL CLASSIFICATION

A. Excava�on shall be unclassified as to materials and shall include all materials that are encountered in the required excava�on.

2.03 BACKFILL MATERIAL

A. Backfill material shall be sandy clay, sand, gravel, so� shale, or other suitable material free from brush, organic material, dirt clods, stone or boulders larger than six inches in greatest dimension, frozen material, or material contaminated by the contents of the old sep�c tank.

B. Backfill within six inches of concrete shall contain no stone larger than two inches and no stone two inches or larger shall lie closer than six inches to the ground surface.

C. Backfill material shall be excavated material whenever it meets specifica�on requirements.

Whenever excavated material contains less than 10 percent of oversized material, the Contractor shall remove boulders larger than 6” from the excavated material at no addi�onal compensa�on and u�lize it as backfill material.

1. Whenever material mee�ng the specifica�on requirements is not available from excava�on, the Contractor shall import material from a designated or approved source, at the Contractor’s expense.

2.04 BEDDING MATERIAL

A. Bedding material used to form the base to set the vault and building on shall be washed sand or 3/8” minus crushed or screened aggregate from a private or commercial source. Sand or aggregate shall be used as a leveling course beneath the concrete vault.

2.05 CAULKING

A. Caulking between the vault and toilet floor shall be 1” by 1” butyl tape designed specifically to bond precast concrete to precast concrete.

2.06 ACCESSIBILITY

A. Other site improvements for this project include construc�ng an ADA-compliant parking space and accessible route to the new toilet building and hiking path(s) at the site. Therefore, the Contractor shall perform excava�on and install bedding material to ensure that the finished ground eleva�on of the new building is nearly level with the adjacent ground surface eleva�on.

B. Refer to the Contract Plan Sheets for addi�onal informa�on regarding construc�on of the accessible site features.

3.01 PREPARATION

A. Coordinate delivery and installa�on logis�cs with the building manufacturer ahead of �me, to the greatest extent possible.

B. Minimize disturbance of the exis�ng landscape.

C. Contractor shall be on site during delivery of the new building and vault, ready to assist as needed.

D. Designate exact loca�on for placement of the vault.

E. Provide clear and level site free of overhead and/or underground obstruc�ons.

F. Provide access to the site for truck delivery and sufficient area for the crane to install and the equipment to perform the contract requirements.

3.02 SAFETY, SHORING, AND PROTECTION

A. The Contractor shall meet OSHA safety rules and regula�ons.

B. Walls of excava�ons 4’ or more in depth shall be supported by bracing, shoring, or other methods, unless the walls are sloped to a safe enough angle from the botom. If shored, the excava�on shall be of proper dimensions to accommodate shoring and bracing, as required, to keep walls from collapsing and to allow for proper installa�on of the work.

C. All exis�ng improvements, either on public or private property, shall be fully protected from damage.

D. All supports shall be removed a�er construc�on is completed, and shall be withdrawn in a manner that will prevent the collapse of the sides of the excava�on.

E. All openings in the ground, caused by the removal of supports, shall be filled with suitable material properly compacted.

F. All excava�ons le� open overnight shall be protected with orange safety fencing secured to steel posts all around the excava�on.

1. The botom of the fence shall follow the contour of the ground.

2. Maximum spacing of the steel posts shall be 10 feet.

3. Minimum height of the fence shall be 36 inches.

3.02 EXCAVATION, BACKFILL, AND SITE GRADING

A. Excava�on

1. Excava�on shall be performed in accordance with the building manufacturer’s recommenda�ons and these Specifica�ons. No�fy the CO of any discrepancies within 24 hours of being discovered, and work coopera�vely to resolve the discrepancies as quickly as possible.

2. Excavate for the installa�on of the toilet vault to a depth that will allow the structure site to be free draining a�er installa�on is completed. Allow for a 2” (minimum) leveling course beneath the toilet vault.

3. Finish floor eleva�on shall be 4” above natural grade measured at the front (entrance) of the exterior slab, to transi�on smoothly into the new sidewalk between the parking lot and toilet building. The back of the building should be slightly higher to allow water to freely drain out of the toilet rooms.

4. All excava�ons shall be kept free from standing water. The Contractor shall provide and maintain, at all �mes during construc�on, means and devices with which to promptly remove and properly dispose of all water entering the excava�on without damage to adjacent property.

5. The excava�on shall be over excavated at least two feet (horizontal measurement) on each side of the vault to allow for compac�on and minor adjustment in orienta�on.

6. Trim tree roots as applicable, cleanly and flush with the walls of the excava�on.

7. Stockpile excavated material away from the excava�on to facilitate crane and delivery truck access. The crane and delivery truck typically need to be side-by-side during placement.

8. Compact the natural ground at the botom of the vault excava�on with a minimum of three passes with an approved wacker-type mechanical tamper.

9. Contractor shall have excava�on complete prior to delivery of the new vault toilet.

10. Contractor shall have equipment on site at the �me of delivery to perform any last-minute site prep work and to begin the backfill opera�on as soon as the building is in place.

B. Bedding

1. The Contractor shall place a leveling course of 2” to 4” deep prior to placement of the vault.

2. Compact leveling course with one pass of an approved wacker-type mechanical tamper.

3. Grade leveling course to eliminate high spots.

4. Compact with a second pass with a tamper.

a. Slope the top of the bedding one percent from back to front (towards the door) of building to allow water to freely drain out of the building.

b. Obtain CO approval of the bedding surface grade / slope prior to se�ng the vault.

C. Backfill

1. Set vault in place and check for level, or ideally one percent slope from back to front of the building.

2. Once proper level is achieved, backfill around the structure using excavated material that meets the requirements in Part 2.03 above.

3. Backfill shall be placed in 8-inch thick (loose measurement) li�s and compacted with a minimum of two passes of an approved vibratory compactor.

D. Finish Grading

1. All surfaces and slopes shall be shaped to blend with the adjacent grades, mounded over or smoothed off, raked, and le� in a uniform and neat condi�on.

2. Slope ground surface within five feet of the new toilet building to provide drainage away from the building.

3. Surface drainage shall be diverted so that it will not enter the area.

3.03 ACCESSORIES

A. Apply polyurethane caulk between toilet riser flange and concrete floor before the toilet riser is installed.

B. A�er exhaust pipes are installed, seal around pipes at the top and undersides of roof, and at the top of the floor slab, with polyurethane caulk.

C. Install raptor protec�on screen over each vent to deter infiltra�on from birds.

3.04 CLEANUP

A. A�er backfilling and grading has been completed, the disturbed area shall be finished to present as near a natural appearance as possible and cleaned up by removing all debris and material not u�lized.

3.05 DISPOSAL

A. All unsuitable excavated material, oversized boulders, stumps, limbs, brush, sod, and other construc�on refuse shall be legally disposed of off Forest Service land.

END OF SECTION 131290 PRECAST CONCRETE TOILET BUILDING