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Emigrant Creek Ranger Station

SITE DEMOLITION 02055-1

SECTION 02055-SITE DEMOLITION

PART 1 GENERAL

1.1 SCOPE

A. This section includes all demolition, removal and/or abandonment of existing above and below grade structures and appurtenances necessary to clear space for new construction and/or to rehabilitate existing construction.

B. Contractor shall verify existing conditions prior to bid submittal.

C. The work specified under this section includes but is not limited to the following:

1. Demolition of site structures including, but not limited to those shown on the drawings, and removal of materials from site.

2. Demolition and removal of pavements, sidewalks, curbs and gutters, drainage structures, utilities, signage or landscaping as required to complete the project.

3. Disconnecting and capping or removal of utilities as required to complete the project.

4. Filling voids in subgrade created as a result of removals or demolition.

1.2 SUBMITTALS

A. Submittals shall be in accordance with the requirements of these Contract Documents and shall include the following:

1. When the material and debris resulting from the Contractor's operations are disposed of at locations off the project, the Contractor shall obtain and submit written permission from the Owner of the property upon which the materials and debris is to be placed. Contractor shall provide executed copy of permit to dispose of waste materials from appropriate jurisdictions.

2. An accurate record of actual locations of all existing utilities and subsurface obstructions which are to remain in place shall be submitted to the Owner prior to final acceptance of the project.

1.3 COORDINATION AND CONTROL

A. The Contractor shall:

1. Conform to all Federal, State and local laws and regulations for demolition, safety of adjacent facilities, dust control, runoff control, and disposal.

SITE DEMOLITION 02055-2

2. Obtain all required permits and licenses and pay all associated fees including disposal charges.

3. Notify affected utility companies before starting work and comply with their requirements.

B. Contractor shall:

1. Not close or obstruct roadways, sidewalks or hydrants without permits.

2. Conform to applicable regulatory procedures when discovering hazardous or contaminated materials.

1.4 JOB CONDITIONS

A. Structures to be demolished shall be discontinued in use and vacated prior to start of demolition work.

B. Contractor to verify existing conditions prior to bid submittal. New or unforeseen work will be classified as “extra work” when the Engineer determines that it is not covered by Contract Unit Prices or stipulated unit prices.

C. Owner assumes no responsibility for the condition of structures to be demolished.

D. Conditions existing at time of inspection for bidding purposes will be maintained by Owner in so far as practicable. Variations within structures may occur by Owner's removal and salvage operations prior to start of demolition work.

E. Items of salvageable value to Contractor to be removed from the site. Storage or sale of salvaged items will not be permitted on site and shall not interfere with any other work specified in the Contract Documents.

PART 2 PRODUCTS

None

PART 3 EXECUTION

3.1 GENERAL

A. Unless otherwise specified, the Contractor shall demolish and remove below grade construction and concrete slabs on grade to a minimum depth of one (1) feet below proposed subgrade.

B. Unless otherwise shown or specified, excavation resulting from demolition and removal operations shall be backfilled with crushed gravel and compacted to ninety five percent (95%) of maximum dry density per AASHTO T-180. Burial of debris shall be prohibited unless otherwise shown or directed.

SITE DEMOLITION 02055-3

C. Excavated areas shall be graded to adjacent existing levels and left smooth, clean, free draining and free of debris as approved by the Owner’s Representative.

D. Existing structures and equipment which are damaged in appearance and/or function by performance of demolition work shall be replaced or repaired to Owner approved condition by the Contractor at no additional cost to the Owner.

E. Clearing and Grubbing with Structural Fill and Backfill: Per Geotechnical Exploration

Report. Strip and stockpile topsoil.

3.2 PROTECTION

A. Contractor shall provide, erect, and maintain temporary barriers and protection as necessary.

B. Existing landscaping materials, appurtenances and structures which are not to be demolished shall be protected from damage, including existing landscaping and irrigation.

Damage caused by demolition operations shall be replaced or repaired at no additional cost to Owner.

C. Contractor shall provide bracing and shoring as required to prevent movement or settlement of adjacent structures. Bracing and shoring shall be Contractor's design.

D. The location of all utilities shall be marked prior to demolition. Contractor shall protect and maintain in safe and operable condition the utilities to remain, and prevent interruption of existing utility service except when authorized in writing by authorities having jurisdiction. Provide temporary services during interruptions to existing utilities as acceptable to governing authorities.

E. Contractor shall clean adjacent structures and improvements of dust, dirt, and debris caused by demolition operations. Return adjacent areas to conditions existing prior to the start of the work.

F. During demolition Contractor shall conform to all Federal, State and local laws and regulations for erosion and pollution control.

3.3 PAVEMENTS, SIDEWALKS, CURBING AND SIMILAR STRUCTURES

A. Removal of existing pavements, sidewalks, curbing and similar structures shall end at an existing joint or a sawed joint. Sawed joints shall be straight, neat and free from chipped or damaged edges.

B. For removal of non-reinforced concrete, the minimum depth of saw cut shall be half the thickness of the concrete but not less than two and one-half inches.

C. For removal of reinforced concrete, the depth of saw cut shall be sufficient to cut all steel unless specified otherwise.

SITE DEMOLITION 02055-4

D. If the concrete is coated with a bituminous surface or other material, the depth of saw cut shall be sufficient to cut into the concrete, not including the coating depth, as specified above.

3.4 EXCAVATION OF RIGID PAVEMENT

A. The Contractor shall excavate rigid pavement, consisting of concrete or concrete base with a wearing surface of brick or bituminous concrete, wherever such excavation is required for the purposes of this Contract.

B. Pavement shall be excavated to neat lines and to widths required for trenches for pipe laying and for construction of structures. Adequate provision shall be made to prevent settlement and breakage of pavement beyond the approved limits of excavation. Concrete pavement shall be cut with a concrete saw in conformance with this section.

C. All pavement broken or damaged beyond the limits above stated, or the approved extension thereof, shall be replaced by the Contractor at his expense.

3.5 MANHOLES, CATCH BASINS, INLETS AND SIMILAR STRUCTURES

A. Existing manholes, catch basins, inlets and similar structures designated to be removed shall be completely removed.

B. Manholes, catch basins, inlets and similar structures designated to be abandoned shall be removed to an elevation of at least two (2) feet below the finished subgrade or ground surface. The remaining void shall be filled with granular backfill material compacted to ninety five percent (95%) of maximum dry density per AASHTO T180.

C. All sewer openings in manholes located on sewer lines shall be plugged with 3300 PSI concrete. Length of all concrete plugs shall be a minimum of one and one-half (1-1/2) times the diameter of the pipe.

D. In-service sewers connected to structures removed or abandoned shall be rebuilt through the area with new pipe. Sewer flow shall be maintained between removal and replacement operations. Abandoned sewers shall be sealed and made watertight with concrete plugs as specified above.

E. All castings salvaged from abandoned or removed structures shall become the property of the Contractor unless otherwise shown or directed.

F. The Contractor shall replace, at no cost to the Owner, materials lost or damaged by negligence or by the use of improper methods.

3.6 DISPOSAL OF DEBRIS

A. Contractor shall not allow debris and/or excess material to accumulate. All debris shall be hauled away from the site as soon as removed.

B. All debris resulting from demolition operations; i.e., broken concrete, masonry, pipe, miscellaneous metal, trees and brush, equipment, etc., shall be trucked from the work site

SITE DEMOLITION 02055-5

by the Contractor and disposed of at spoil sites in a legal manner, in full compliance with all Federal, State and local laws and regulations.

C. The Contractor shall police the hauling of debris to ensure that all spillage from trucks is promptly and completely removed and cleaned up.

3.7 MAINTENANCE OF OWNER'S OPERATIONS

A. Demolition shall be scheduled and performed in strict conformance with these Specifications and in a manner which results in no interruption of Owner's normal operations beyond that provided for and approved by the Owner. The date and time of commencing the separate items of demolition work shall be submitted to the Owner for review, and no demolition work shall commence until the Owner’s approval of date and time is given.

B. All equipment, labor and material costs which are made necessary by the requirements of the Contractor's sequence of operations shall be borne by the Contractor.

3.8 USE OF EXPLOSIVES

A. The use of explosives for the work of removal of structures and obstructions is

PROHIBITED.

PART 4 SPECIAL PROVISIONS

None.

END OF SECTION

Emigrant Creek Office Addition High Density Polyethylene Piping 02084 - 1

SECTION 02084

HIGH DENSITY POLYETHYLENE PIPING

1.01 SCOPE

A. Provides for furnishing and installing High Density Polyethylene (HDPE) pipe used for potable water distribution and material related to its installation.

2.01 HIGH DENSITY POLYETHYLENE (HDPE) PIPE, TEES, & REDUCERS

A. All waterlines (pipe and fittings) shall be new and unused, of the type, pressure rating or class, and size (nominal diameter) specified and as shown on the drawings.

B. All material must meet applicable National Sanitation Foundation (NSF) standards for public drinking water. Pipe shall bear the NSF seal. The pipe manufacturer shall provide certification that the pipe meets this specification.

C. High Density Polyethylene (HDPE) plastic pipe shall be PE-3408 as defined in

ASTM D-1248, with a minimum cell classification of 345434C in accordance with ASTM D 3350. The pipe shall be SDR11 (160PSI) pipe and comply dimensionally with ASTM D 3035. Pipe shall comply with AWWA C901 standard for Polyethylene Pressure Pipe.

D. Rolled Pipe

1. HDPE pipe equal to or smaller than 2" diameter shall be provided in rolls of

500 ft length.

2. HDPE pipe larger than 2" diameter shall be provided in 40' lengths rather than in rolls.

E. HDPE pipe shall be as manufactured by PW Pipe, ISCO or approved equal, and supplied by Ferguson Industrial Plastics, or approved equal.

F. HDPE tees and reducers shall be as manufactured by same as above, compatible fittings, or approved equal.

High Density Polyethylene Piping 02084 - 2

2.02 TRANSITION FITTINGS - COMPRESSION (1” DIAMETER AND SMALLER)

A. Fittings shall be specifically made for HDPE pipe per Subsection 2.01 – High

Density Polyethylene (HDPE) Pipe, Tees, & Reducers. Fittings shall be made of Polypropylene. Fittings shall bear the NSF seal. Fittings shall be pressure rated to 200 psi @ 73°F.

B. Fittings shall be compression x female iron pipe thread (FIPT).

C. Fittings shall be HDPE Compression Fittings, Female Adapter Threaded (F), blue (IPS) as distributed by ISCO, PWPipe or approved equal.

2.03 TRANSITION FITTINGS - BUTT FUSION or ELECTROFUSION WELD

(LARGER THAN 1” DIAMETER)

A. Fittings shall be specifically made for HDPE pipe per Subsection 2.01 – High

Density Polyethylene (HDPE) Pipe, Tees, & Reducers. Fittings shall be connected to HDPE pipe by butt fusion or electrofusion process. The other end of the fitting shall be male threaded (IPS) steel.

B. Fittings shall be as manufactured by Performance Pipe, P.O. Box 269006, Plano, TX, phone (800) 527-0662; or approved equal.

3.01 LAYING PIPE

A. HDPE pipe shall be weaved in the trench to provide horizontal slack in the line for expansion and contraction.

B. Pipe shall be allowed to cool to within 20o F of the shaded trench bottom temperature before backfilling.

3.02 PIPE JOINING

A. The joining method for pipe, tees, and reducers shall be butt fusion method and shall be performed in accordance with the pipe manufacturer's recommendations. Butt fusion equipment used in the joining procedures shall be capable of meeting all conditions recommended by the pipe manufacturer, including but not limited to, temperature requirements, alignment, and fusion pressures.

B. Other methods for pipe joining are not approved. Methods not approved include but are not limited to:

1. Ribbed steel inserts with stainless steel clamps.

High Density Polyethylene Piping 02084 - 3

2. Compression fittings.

3. Electrofusion welding

C. Personnel trained in butt fusion techniques by the manufacturer of the pipe, shall supervise or perform butt fusion operations.

D. Butt fusion shall be performed between pipe ends or pipe ends and fitting outlets, of like outside diameter and wall thickness (SDR or DR). Butt fusion joining between same diameters but unlike wall thickness shall not be permitted.

Transitions between unlike wall thickness shall be made with a transition nipple (a short length of the heavier wall pipe with one end machined to the lighter wall) or by mechanical means.

E. Branch connections to the main (tees & reducers) shall be made with polyethylene fittings, and butt fused or electrofused.

F. On every day butt fusions are to be made, the first fusion of the day shall be a trial fusion. The trial fusion shall be allowed to cool completely, and then fusion test straps shall be cut out. The test strap shall be 300 mm (12") (min) or 30 times the wall thickness in length with the fusion in the center, and 25 mm (1") (min) or 1.5 times the wall thickness in width. Bend the test strap until the ends of the strap touch. If the fusion fails at the joint, a new trial fusion shall be made, cooled completely and tested. Butt fusion of pipe to be installed shall not commence until a trial fusion has passed the bent strap test.

3.02 PIPE TRANSITIONS

A. Transitions for making connections from HDPE pipe to galvanized steel pipe shall be per:

1. Subsection 2.02 – Transition Fittings – Butt Fusion or Electrofusion(1” diameter or smaller)

2. Subsection 2.03 – Transition Fittings - Butt Fusion or Electrofusion (larger than 1” diameter)

Emigrant Creek Ranger District

CLEARING AND GRUBBING 02110-1

SECTION 02110 – CLEARING AND GRUBBING

PART 1 - GENERAL

1.1 DESCRIPTION

A. Clearing and grubbing shall consist of clearing the surface of the ground of the designated areas of all trees, stumps, down timber, logs, snags, brush, undergrowth, hedges, grass or weeds, fences, structures, concrete surfacing, vegetative growth, roots, debris, and rubbish of any nature, natural obstructions or such material, which in the opinion of the Engineer is unsuitable for the foundation of embankments, pavements, or other required structures, including the disposal from the project of all spoil materials.

B. Remove building foundations and any other structures within the designated construction limits.

C. Remove tree stumps to depth of at least 18 inches below finish surface grade.

D. The above work shall be considered incidental to the item "Clearing and Grubbing."

E. Roots and other vegetation shall be removed to a depth of at least 6” below finish grade or subgrade whichever is lower. Stripped materials shall be screened to remove vegetative growth, prior to incorporation in the work. All costs for stripping and screening shall be considered included in the bid price for Clearing and Grubbing

1.2 RELATED DOCUMENTS

A. Section 02220 - Excavation and Embankment

B. Drawings and General Provisions of the contract.

C. Supplementary conditions.

PART 2 - PRODUCTS

2.1 MATERIALS

A. All materials used in conjunction with this work shall be considered incidental to the work.

PART 3 - EXECUTION

3.1 PREPARATION

A. The clearing and grubbing shall be done at a satisfactory period in advance of the grading operations.

B. All spoil materials removed by clearing and grubbing shall be disposed of by removal from the site by the Contractor at his expense. Strippings shall be segregated in the

CLEARING AND GRUBBING 02110-2

Contractor's removal operation and placed in landscape areas to the greatest extent possible.

3.2 BLASTING

A. Prohibited.

3.3 EXISTING STRUCTURES AND UTILITIES

A. The removal of existing structures and private utilities required to permit orderly progress of work shall be accomplished by the Contractor, unless otherwise shown on the plans. Abandoned structures and utilities shall be removed by the Contractor.

Whenever a telephone or power pole, pipeline, conduit, sewer, roadway, or other utility is encountered and must be removed or relocated, the Contractor shall notify the proper local authority or owner and attempt to secure prompt action.

3.4 CLEARING AND GRUBBING

A. All work areas, and/or areas to be graded shall be cleared and grubbed.

B. Tap roots and other projections over one (1) inch in diameter shall be grubbed out to a depth ranging between 6 inches and 12 inches below the finished subgrade or slope elevations as directed by the supervising geotechnical engineer.

C. All holes remaining after the grubbing operation in embankment areas shall have the sides broken down to flatten out the slopes, and shall be filled with acceptable material, moistened and properly compacted in layers to the density required in the Section "Excavation and Embankment." The same construction procedure shall be applied to all holes remaining after grubbing in the excavation areas where the depth of holes exceeds the depth of the proposed excavation.

END OF SECTION 02110

EARTHWORK AND SUBGRADE PREPARATION 02201-1

SECTION 02201 - EARTHWORK AND SUBGRADE PREPARATION

1.1 SUMMARY

A. Scope of work shall include, but is not limited to, the following:

1. Stripping of sod and organic matter.

2. Rough grading and fine grading.

3. Excavations.

4. Fill construction.

5. Moisture control and compaction.

6. Finishing subgrade and slopes.

7. Disposal of materials.

8. Overexcavation

9. Protection of facilities.

10. Obtaining all required inspections.

11. Clean up.

B. Related Sections:

1. Section 02055 - Site Demolition

2. Section 02222 - Trench Excavation and Backfill

3. Section 02220 – Excavation and Embankment

4. Section 02235 - Aggregate Base Course

1.2 PROTECTION

A. The Contractor shall provide the necessary protection to prevent damage, injury or loss of property at the site or adjacent thereto, including trees, shrubs, lawns, walks, pavements, roadways, monuments, structures and utilities not designated for removal, relocation or replacement in the course of construction.

2.1 STRIPPINGS

A. Stripping defined as organic matter such as peat, sod, roots, stumps, and vegetative matter, which cannot be compacted to specified density into a stable mass.

B. Limits of stripping subject to Owner’s approval.

2.2 EXCAVATIONS

A. Common excavation defined as all material not classified as rock excavation.

B. Rock excavation shall be defined as follows:

EARTHWORK AND SUBGRADE PREPARATION 02201-2

1. "Rock excavation shall consist only of that solid bedrock or ledge rock and boulders over two (2) cubic yards in volume which cannot be removed by a D8K (or approved equal) bulldozer with four barrel hydraulics and dual rippers or 90,000 pound class Excavator (P.C 400 Komatsu or 235 Caterpillar or approved equal) with single shank ripper on back of bucket, which shall not be more than thirty-six inches (36") in width, but which requires systematic drilling and blasting or the use of rock splitters, pneumatic hammers and wedges. All D8K's and 90,000 pound class Excavators shall be in excellent operating condition and operated by personnel competent to operate like machinery."

2. "Removal of existing concrete and asphaltic surfaces does not qualify as rock excavation."

2.3 ENGINEERED FILLS AND EMBANKMENTS

A. Select imported materials as specified on the plans.

B. All materials shall be free of organic matter, sod, soft or spongy earth, clods, large rocks, or broken pavement fragments, etc., which would preclude compaction at specified density into a stable mass.

C. All materials shall be within moisture content range necessary to achieve specified compaction.

D. Fill materials at all times shall be subject to approval of the Owner’s Representative.

2.4 OPTION FOR FINE-GRAINED FILL

A. Use fine-grained material to raise site grade following removal of plastic clays.

B. Do not use fine-grained material in the following locations:

1. Below footings.

2. In any area not accessible by large roller.

C. Fine-grained material is defined as approved soil free of organics, construction debris, and plastic clay, and as follows:

1. Plasticity Index: 12 or less.

2. Quality Assurance: Verify Plasticity Index with minimum of 2 Atterberg Limits tests on representative samples from the borrow source.

3. Arrange for testing to be conducted by Independent Laboratory specified in

Division 1 Section “Testing and Inspections”.

3.1 CONTRACTOR RESPONSIBILITY TO OBTAIN ALL REQUIRED INSPECTIONS

A. The Contractor shall be responsible to ensure that all inspections and testing required by the drawings, contract documents or agencies having jurisdiction are completed or

EARTHWORK AND SUBGRADE PREPARATION 02201-3

witnessed by authorized inspectors prior to proceeding with subsequent work which covers or which is dependent on the work to be inspected. Work completed or covered without obtaining required inspections will be considered as unauthorized work as outlined below, and may be ordered removed at the Contractor's expense.

3.2 TOLERANCES AND LINE/GRADE CONTROL

A. Rough grade per plan requirements to within 0.30 feet vertically and 1.0 feet horizontally of required lines and grades at any point.

B. Following installation of underground utilities, fine grade per plan requirements to within

0.05 feet vertically and 0.25 feet horizontally of required lines and grades at any point.

Place curb backfill and dress up disturbed areas to same tolerances.

C. All finished grading surfaces to be smooth, uniform and compact.

D. Contractor to provide sufficient survey instruments, blue tops, etc., as necessary to construct subgrades accurately within the above tolerances. Contractor to set roadway centerline bluetops for fine grading.

3.3 STRIPPING

A. Within areas of excavation or embankment, remove tree stumps, roots, sod, grass, crop residue, decayed vegetable matter and other organic materials and vegetation, to a depth of at least 6 inches below excavation subgrade or original ground, whichever is lower.

B. Stripping limits shall be subject to Owner’s approval. Contractor shall place no engineered fills until stripping limits have been approved.

3.4 EXCAVATIONS

A. Saw cut and remove existing AC pavement and PCC as required by the plans.

B. Excavate to lines and grades required by plans and/or as staked in field.

C. Over excavate as directed by the Geotechnical Engineer to remove plastic soils material.

D. Protect existing facilities from damage when excavating.

E. Protect construction stakes and survey monuments.

F. Finish cut slopes smooth, uniform and compact.

G. The Contractor shall notify the Owner’s Representative immediately if soft or uncompactable subgrade soils are encountered. When directed by the Engineer, over-excavate to remove poor foundation material as specified herein.

H. Unauthorized over-excavation shall be backfilled at Contractor's expense in conformance with these specifications using the Owner’s approved materials.

EARTHWORK AND SUBGRADE PREPARATION 02201-4

I. Haul over excavated materials offsite at a disposal site arranged for by the Contractor.

3.5 SUBGRADE PREPARATION

A. Perform all operations involved in excavating, hauling and/or placing earthwork or baserock in a manner to prevent damage to subgrades or other completed or partially completed work.

Loaded trucks shall not be operated on marginal subgrades incapable of supporting the loads.

B. Immediately following fine grading operations, compact subgrade areas to achieve 95% of maximum dry density for a 6-inch depth per AASHTO T180 test method.

C. Subgrade, which is wet of optimum, shall be ripped and aerated as necessary to achieve optimum moisture content for compaction to specified densities. Scarify and sprinkle water on dry subgrade as necessary to achieve the specified compaction.

D. Finish subgrade smooth and uniform to required lines and grades within job tolerances.

E. Soft or spongy subgrade, which exhibits deflection under proof rolling, shall be over excavated and backfilled as directed by the Owner’s Representative. It shall remain the Contractor's responsibility to notify the Owner’s Representative immediately if such subgrade is encountered.

F. Overexcavation of the subgrade shall be accomplished using a large trackhoe with a smooth-edged bucket. Soils, which are soft, as evidenced by excessive tearing upon excavation by the trackhoe or which evidences excessive pumping under foot pressure may be considered too soft to support and compact the baserock, and additional overexcavation may be required. Excavation work shall not be conducted during nor subgrade left exposed to heavy rains.

G. No equipment shall be allowed to run directly on the excavated subgrade until the full rock section is in place. Rock shall be end dumped into the excavated street in a manner to provide at least the full rock section to distribute truckloads and prevent damage to the subgrade. Crushed rock to be spread in lifts using a small dozer to the full rock section indicated prior to operating loaded trucks on the section.

H. Grade and compact crushed rock base to the specified compaction.

I. Any soft spots identified by either compaction testing or which exhibit deflection under proof rolling shall be corrected and retested prior to paving or curb placement. By definition, "soft" spots are defined as any area(s) for which the required compaction specification cannot be met, or which deflect, pump or rut under loads.

J. Should inclement weather (i.e. significant rain) occur between the time the proof roll is performed and either curb placement or paving, another proof roll may be required prior to paving.

3.6 ENGINEERED FILLS AND EMBANKMENTS

EARTHWORK AND SUBGRADE PREPARATION 02201-5

A. Construct fills and embankment sections to lines and grades required by plans with tolerances as specified herein.

B. Strip away sod and organic matter to a minimum depth of twelve (12) inches unless otherwise shown or directed between toes of fill or embankment prior to placing fill to depths required by drawings, or as the Engineer directs.

C. Fills to be constructed in lifts, each lift not to exceed 6-inches in compacted thickness.

D. Each lift to be compacted to specified density prior to placement of succeeding lift.

E. Condition fill material from excavations and borrow areas for proper moisture content before placing in embankment.

F. Place no material that is frozen or excessively wet. Do not place material in final position in fills or embankments until excess moisture has been removed to within -4% to +2% of optimum moisture.

G. Scarify and sprinkle dry lift surfaces where necessary to ensure bond with succeeding lift.

H. Shape subgrades and finished surfaces until smooth and uniform.

I. Place topsoil backfill and dress up disturbed areas to the Owner’s satisfaction, topsoil areas to be finished smooth, free draining, uniform and free from fragments and debris.

3.7 COMPACTION REQUIREMENTS

A. Compact earthwork areas to be at least the following densities, relative to the maximum dry density per AASHTO T-180 test method.

1. Subgrade - 95 percent.

2. Fill and embankment lifts - 95 percent.

3. Backfill of over excavation - 95 percent.

B. Materials not placed in accordance with these specifications shall be reconsolidated or removed and replaced, as the Owner’s Representative directs and at the expense of the Contractor.

C. Each lift shall be tested and accepted prior to proceeding with the next lift.

D. Contractor shall cooperate with the Owner’s Representative in his performance of in-place density tests.

E. In addition to moisture-density testing, each compacted layer may be proof rolled to check for deflection or reaction and to verify that no soft or pumping areas remain in any layer or foundation soil.

3.8 CLEAN UP

EARTHWORK AND SUBGRADE PREPARATION 02201-6

A. Contractor to clean up site of work of all litter and construction debris caused by him following each of his rough and fine grading operations.

B. Materials judged unsuitable for placement in any fill area to be removed from site by the

3.9 INSTALLATION OF FINE-GRAINED FILL

A. Compaction: Compact fine-grained fill in accordance with the maximum dry density of

ASTM D698 for estimating relative compaction, and as follows

1. In loose lifts not exceeding 12 inches.

2. To a minimum 95 percent relative compaction, using ASTM standard cited above.

3. Adjust moisture content of fill to within 2 percent more or less of its optimum value prior to compaction.

4. Use a padfoot or kneeling roller.

B. Quality Assurance: Verify maximum dry density and optimum moisture content for each 12-inch lift.

1. Arrange for testing to be conducted by Independent Laboratory specified in Division 1 Section “Testing and Inspections”.

C. Preparation for Fill Cap: Place the select fill cap immediately after placing fine-grained fill, except as noted below:

1. If the placed fill becomes too dry prior to placing subsequent lifts, scarify and wet the surface of the fill.

2. Do not place subsequent lifts if the surface of the fill becomes too wet.

3. Use the fill cap to protect fine-grained fill from weather and construction traffic.

D. Traffic: Minimize truck traffic over completed fill operations. Continuous truck or heavy equipment traffic could cause the fine-grained fill to pump.

E. Proof-Rolling: Proof-roll the final lift of fine-grained fill with a fully-loaded 10-yard dump truck. Rip, aerate, and recompact or over-excavate any areas that pump o appear soft. Backfill with compacted select fill.

PART 4 SPECIAL PROVISIONS

None.

DEMOLITION 02210-1

SECTION 02210 – DEMOLITION

PART 1 - GENERAL

1.01. SUMMARY

A. Building and Site Demolition:

1. Demolition of designated building structures.

2. Demolition of site improvements including paving, curbing, site walls, and utility structures.

3. Demolition of below-grade foundations and site improvements to depth to avoid conflict with new construction or site work.

4. Removal of hollow items or items which could collapse.

5. Protection of site work and adjacent structures.

6. Disconnection, capping, and removal of utilities.

7. Pollution control during building demolition, including noise control.

8. Removal and legal disposal of materials.

B. Selective Demolition:

1. Selective demolition of interior partitions, systems, and building components designated to be removed.

2. Selective demolition of exterior facade, structures, and components designated to be removed.

3. Protection of portions of building adjacent to or affected by selective demolition.

4. Removal of abandoned utilities and wiring systems.

5. Notification to Owner of schedule of utilities shut-off which serve occupied spaces.

6. Pollution control during selective demolition, including noise control.

7. Removal and legal disposal of materials

1.02. SUBMITTALS

A. Schedule: Submit for approval selective demolition schedule, including schedule and methods for capping utilities to be abandoned and maintaining existing utility service.

1.03. QUALITY ASSURANCE

A. Comply with governing codes and regulations. Use experienced workers.

DEMOLITION 02210-2

1.04. PROJECT CONDITIONS

A. Immediate areas of work will not be occupied during selective demolition. Adjacent areas may be occupied by Owner’s personnel. Do not interrupt Owner’s use of adjacent facilities.

NOT USED

3.01. DEMOLITION

A. Do not damage building elements and improvements indicated to remain. Items of salvage value shall be returned to Owner. Storage or sale of items at project site is prohibited.

B. Do not close or obstruct streets, walks, drives or other occupied or used spaces or facilities without the written permission of the Owner and the authorities having jurisdiction. Do not interrupt utilities serving occupied or used facilities without the written permission of the Owner and authorities having jurisdiction. If necessary, provide temporary utilities.

C. Cease operations if public safety or remaining structures are endangered. Perform temporary corrective measures until operations can be continued properly.

D. Provide adequate protection against accidental trespassing. Secure project after work hours.

3.02. SCHEDULE

A. Items for Protection During Demolition and Construction:

1. Existing landscape adjacent to improvements.

2. Existing signage not identified for relocation or removal.

B. Items to be Salvaged for Reinstallation:

1. Information sign across from existing gatehouse.

C. Items to be Salvaged for Delivery to Owner:

1. Not applicable.

D. Utilities Requiring Interruption, Capping, or Removal:

1. Existing utility connections to existing gatehouse.

Emigrant Creek

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SECTION 02220 – EXCAVATION AND EMBANKMENT

PART l - GENERAL

A. This item shall consist of excavating, removing, placing, compacting and satisfactorily disposing of all materials within the limits of the work required to construct paved areas, paths, sidewalks, utilities, graded areas, building pads, and other areas for drainage, building construction, or other purposes in accordance with these specifications and in conformity with the dimensions and typical sections shown on the plans, and with the lines and grades established by the Engineer.

B. Classification: All material shall be defined as "Unclassified Excavation". No attempt will be made to quantify or classify rock excavation. No separate measurement or payment for rock excavation will be made.

C. Unclassified Excavation: Unclassified excavation shall consist of the excavation, transportation, and disposal of all material, regardless of its nature, not otherwise classified and included in the bid schedule under other pay items.

D. Unclassified Embankment: Unclassified embankment shall consist of the preparation, placement, compaction, and finishing of all embankments and material, regardless of its nature, not otherwise classified and included in the bid schedule under other pay items.

1.2 RELATED DOCUMENTS

A. Section 02110 - Clearing and Grubbing.

B. Section 02222 - Trench Excavation, Bedding, and Backfill.

PART 2 - PRODUCTS

A. Any materials used in conjunction with this work shall be furnished by the Contractor and will be considered incidental to the item.

B. When the volume of the excavation exceeds that required to construct the embankments to the grades indicated, the excess shall be disposed of off-site at the Contractor’s expense. When the volume of excavation is not sufficient for constructing the fill to the grades indicated, the deficiency shall be supplied from borrow sources at locations authorized by the Engineer.

C. Excavated Material: All suitable material taken from excavations shall be used in the formation of embankment, subgrade, and for backfilling as indicated on the plans or as directed by the Engineer.

Emigrant Creek 0941

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D. Top Soil: The topsoil shall be a natural friable soil, possessing characteristic of representative productive soils from the construction site. The topsoil shall be reasonably free from subsoil, clay lumps, stone, or similar objects larger than 2 inches in greatest diameter, brush, stumps, roots, sod, objectionable weeds or litter, excess acid or alkali, or any other material or substance which may be harmful to plant growth or a hindrance to subsequent smooth grading, and maintenance operations.

E. All import material shall be free draining earth material free of organic material, clay or plastic materials, conforming to Unified Soil Classification of SM, SP or SW, unless otherwise pre-approved by the Owner and Engineer.

F. Structural Fill: Imported granular soil or graded sand and gravel having 100 percent passing a three-inch sieve, 35 to 75 percent passing the No. 4 sieve, and less than 25 percent passing a No. 200 sieve.

PART 3 - EXECUTION

3.1 GENERAL

A. The Contractor shall be responsible to ensure that all inspections and testing required by the drawings, contract documents or agencies having jurisdiction are completed or witnessed by authorized inspectors prior to proceeding with subsequent work which covers or which is dependent on the work to be inspected. Work completed or covered without obtaining required inspections will be considered as unauthorized work, and may be ordered removed at the Contractor’s expense.

B. Should the Contractor excavate below the designated lines, or below lines that can be reasonably ascertained from the plans and specifications, he shall replace the excavation with approved materials, in an approved manner and condition, at his own expense. All excavating, moving, placing and depositing of all materials are subject to approval by the Engineer. The Engineer shall determine the suitability of material to be placed in embankments. All materials determined unsuitable shall be disposed of in waste areas or as directed. Topsoil and strippings shall not be used in fills or in subgrades but shall be handled and placed as specified.

C. The Contractor shall inform and satisfy himself as to the character, quantity, and distribution of all material to be excavated. No payment will be made for any excavated material which is used for purposes other than those designated. All spoil areas shall be leveled to a uniform line and section and shall present a neat appearance before project acceptance.

D. If existing pavement areas that will be left in place are damaged due to hauling or to any other activity of the Contractor, they shall be replaced at the Contractor's expense as directed by the Engineer. Those areas outside of the pavement area which are disturbed due to the Contractor's operations shall be restored to their original condition prior to final acceptance of the project.

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E. Spillage of excavation materials on paved areas shall be immediately cleaned up by the Contractor. If required by the Engineer, cleanup shall include brooming and flushing with water.

F. If it is necessary to interrupt existing surface drainage, sewers or underdrainage, conduits, utilities, or similar underground structures, or parts thereof, the Contractor shall be responsible for and shall take all necessary precautions to protect and preserve or provide temporary services. When such facilities are encountered, the Contractor shall notify the Engineer, who shall arrange for their removal, if necessary. The Contractor shall, at his own expense, satisfactorily repair all damage to such facilities or structures which may result from any of his operations during the period of the contract.

G. Where remaining ends of abandoned pipes or portions of other items partially removed under this specification would be left exposed, removal shall be carried into the slope or below grade to furnish no evidence of their existence in the finish surface. Remaining ends of sewer pipes and conduits shall be capped or plugged in a watertight manner.

H. Keep dust down at all times, including during non-working periods. Sprinkle frequently with water, or treat with dust suppressants, the soil at the site, haul roads, site access roads, and other areas disturbed by operations.

I. Any and all excess excavation material not incorporated in the work, or in the site embankments, shall be disposed of off-site, at the Contractor’s expense. Any and all costs associated with such off-site disposal, including but not limited to; loading, hauling, unloading, disposal, fees and permits, shall be considered included in the bid price for excavation and no additional compensation will be provided therefore.

There will be no additional compensation for the import of alternative materials, or for import as the result of the inefficient usage of on-site materials, as determined by the Engineer.

3.2 EXCAVATION

A. Excavation shall be performed as indicated on the contract plans to the lines, grades, and elevation shown, or as directed by the Engineer, and shall be made so that the requirements for formation of embankments can be followed. Unless otherwise specified, no excavation or stripping shall be started until the Engineer has staked out the proposed work. All material encountered within the limits indicated shall be removed and disposed of as directed. During the process of excavation, the grade shall be maintained so that it will be well drained at all times. When directed, temporary drains and drainage ditches shall be installed to intercept or divert surface water which may affect the work.

B. When selective grading is specified or required as indicated on the plans, the excavated material shall be handled to allow the selected material to be properly placed in the embankment and in the capping of pavement subgrades as determined from the soil profile and soil characteristics. This material shall be deposited within the designated areas as shown on the plans or as directed by the Engineer.

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C. In cut areas not encountering solid rock, the upper 12 inches below finish subgrade shall be loosened, brought to optimum moisture content and recompacted to not less than 92 percent of modified proctor density as determined by AASHTO T-180.

D. The subgrade under areas to be paved shall be compacted to the depths and to the densities at optimum moisture as shown on the plans or as specified in the specifications. When not otherwise shown or specified, excavate to a minimum depth of one (1) foot below subgrade and compact to not less than ninety-five percent (95%) of modified proctor density as determined by AASHTO T-99.

E. No payment or measurement for payment will be made for suitable materials removed, manipulated, and replaced in order to obtain density. Any removal, manipulation, aeration, replacement, and recompaction of suitable materials necessary to obtain the required density shall be considered as incidental to the excavation and embankment operations, and shall be performed by the Contractor at no additional cost to the project.

F. Stones, rock fragments, or crushed asphalt concrete larger than four (4) inches in their greatest dimension will not be permitted in the top one (1) foot of the specified subgrade.

G. In cuts, all loose or protruding rocks on the back slopes shall be barred loose or otherwise removed to line or finished grade of slope. All cut-and-fill slopes shall be uniformly dressed to the slope, cross section, and alignment shown on the plans or approved by the Engineer.

H. In areas to receive landscaping, topsoil shall be placed within the top 12" of the finish grade. Amendments to the topsoil material will be the responsibility of the Landscape

3.3 INCIDENTAL CONSTRUCTION

A. The excavation work to be done under the contract shall include the excavation of such ditches and channel changes as may be called for by the plans or as may be needed for proper drainage or for proper handling of drainage water, irrigation waters and other waters in the vicinity of the project. It shall also include the construction of approaches, random fills and other items incidental to the work, wherever such are ordered by the Engineer.

B. Each ditch, channel change, approach, random fill or other incidental item shall be constructed to such cross section, alignment and grade as the Engineer may establish.

The materials excavated in connection with the construction of such items and not needed for other purposes shall be used in the construction of embankments or disposed of in such other manner as approved by the Engineer.

3.4 BLASTING

A. Prohibited.

3.5 BORROW EXCAVATION

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A. Borrow area(s) are not available within the project site.

B. When borrow sources are outside the project boundaries, it shall be the Contractor's responsibility to locate and obtain the supply, subject to the approval of the Engineer.

The Contractor shall notify the Engineer, sufficiently in advance of the beginning of excavation, so necessary measurements and tests can be made. All objectionable material shall be disposed of as directed. All borrow pits shall be opened up immediately to expose the vertical face of various strata of acceptable materials in regular lines to permit accurate measurements and shall be drained and left in a neat and presentable condition with all slopes dressed uniformly.

C. The borrow excavation shall be handled and placed as specified in these specifications for excavation and embankment.

3.6 PREPARATION OF EMBANKMENT AREA

A. All vegetation such as brush, heavy sods, heavy growth of grass, decayed vegetable matter, rubbish, and any other unsuitable material within the area upon which embankment is to be placed shall be stripped or otherwise removed before the embankment is started, and in no case shall such objectionable material be allowed in or under the embankment. No direct payment will be made for stripping. Stripping of embankment areas shall be considered incidental to the work.

B. Immediately prior to the placing of the fill materials, the entire area upon which the embankment is to be placed, except where limited by rock, shall be scarified and broken by means of a disc harrow or plow, or other approved equipment, to a depth of twelve (12) inches. Scarifying shall be done approximately parallel to the axis of the fill. All roots, debris, large stones, or objectionable material that would cause interference with the compaction of the foundation or fill shall be removed from the area and disposed of as specified.

C. In areas where the embankment is to be constructed over existing paved surfaces, the paved surface shall be removed.

D. Subexcavation: Where indicated on the plans or within the Contract Documents and

Specifications, existing earth material shall be removed and recompacted to the depths specified, prior to the placement of embankment. All such work shall be subject to approval by the supervising geotechnical engineer.

E. After clearing and stripping of embankment areas, native soils shall be proof-rolled with a large self-propelled, vibratory padfoot compactor or loaded 10 cubic yard dump truck under the supervision of the Owner’s Geotechnical Engineer prior to placing embankment or structural fill materials. Proof-rolling shall be completed to the Geotechnical Engineer’s satisfaction prior to placing embankment or structural fill materials.

F. Where embankments are to be constructed on existing ground steeper than 5 horizontal: 1 vertical, the ground surface shall be benched and keyed prior to the placement of embankment. A minimum of 2 feet perpendicular to the slope of the original ground shall be removed and re-compacted as the fill is brought up in layers.

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3.7 FORMATION OF EMBANKMENTS

A. Embankments shall be formed of satisfactory materials placed in successive horizontal layers of not more than eight (8) inches in loose depth for the full width of the cross section, unless otherwise directed or specified.

B. All materials entering embankments shall be reasonably free of organic matter such as leaves, grass, roots, and other objectionable material. Soil, granular material, and any other material permitted for use in embankment shall be spread in successive layers as specified.

C. Operations on earth work shall be suspended at any time when satisfactory results cannot be obtained because of rain, freezing weather, or other unsatisfactory conditions of the field. The Contractor shall drag, blade, or slope the embankment to provide proper surface drainage.

D. The material in the layers shall be of the proper moisture content before rolling to obtain the prescribed compaction. Wetting or drying of the material and manipulation when necessary to secure a uniform moisture content throughout the layer shall be required. Should the material be too wet to permit proper compaction or rolling, all work on all portions of the embankment thus affected shall be delayed until the material has dried to the required moisture content. Sprinkling shall be done with approved equipment that will sufficiently distribute the water. Sufficient equipment to furnish the required water shall be available at all times. Samples of all embankment materials for testing, both before and after placement and compaction, will be taken at frequent intervals. From these tests, corrections, adjustments and modifications of methods, materials, and moisture content shall be made to construct the embankment.

G. Rolling operations shall be continued until the embankment is compacted to not less than ninety five percent (95%) of modified proctor density, as determined by

AASHTO T-99.

H. During construction of the embankment, the contractor shall route his equipment at all times, both when loaded and when empty, over the layers as they are placed and shall distribute the travel evenly over the entire width of the embankment. The equipment shall be operated in such a manner that cemented gravel or other chunky soil material will be broken up into small particles and become incorporated with the other material in the layer.

I. In the construction of…