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02050 DEMOLITION F. Inspection and Testing C. Trenching and Backfilling
<br /> 1. See Division 1-General Requirements- 01400 Quality Control . 1. Trench to line and grade shown on plans.
<br /> 2. Submittals: Submit samples of each imported material proposed for 2. After bedding compaction has been approved by the Architect, place
<br /> 070 Selective Demolition use in sufficient quantities for the required tests. approved backfill material and compact to trench backfill relative
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<br /> A. Concrete Walks, Curbs, and Gutters: densities shown on the drawings or as specified for the area
<br /> 1 . Where portions of existing concrete walks, curbs and gutters are to G. Materials traversed by the trench.
<br /> be saved, cut through the concrete with a clean uniform saw cut . 1 . Fill Material
<br /> a. Site-Derived Material : Granular, nonexpansive site soli free D. Rock Base Under Slabs on Grade: I
<br /> 2. Break out all concrete designated for removal , from organic matter , debris meeting the requirements of import 1. Place rock base to compacted thickness shown on drawings. Roll with
<br /> B. Asphalt Concrete Paving: Break out existing asphalt concrete paving material described below may be used for site fill material . a steel tired roller or other approved equipment to elevation shown
<br /> where designated for removal , including existing base and subbase on drawings.
<br /> material . b. imported Material : Where site material is not sufficient 02500 PAVING AND SURFACING
<br /> C. Existing Buried Structures and Tanks as they interfere with work:
<br /> quantity or quality to supply site fill requirements, Import
<br /> 1 . Cut existing manholes. curb Inlets and other buried concrete clean, granular, non-expansive material free from organic 510 Asphaltic Concrete Paving
<br /> structures designated for removal to a depth at least 2 feet be I ow matter, debris and rocks and lumps exceeding 6 inches in greatest A. Requirements
<br /> final grade. dimension and meeting the following requirements: 1 . Subbase and base construction.
<br /> 2. Remove entire structure where the structure interferes with new 1) Plasticity Index: No greater than 12.
<br /> 2. Asphalt concrete paving .
<br /> construction. 2) R Value: 25 minimum.
<br /> 3. Wood headers.
<br /> 3. Buried Tanks: Where new construction interferes with buried tanks ,
<br /> 2. Slab Base Rock B. Related work included in other sections : I
<br /> remove buried tanks and backfill excavation as specified for a. Crushed rock or gravel meeting the following requirements:
<br /> i . Subgrade preparation. See 02100
<br /> structural backfill . 1) Clean and free from foreign material . 2. Concrete curbs, gutters, and walks. See 03300,
<br /> 4. Fill all other structures and tanks with lean concrete ( 4 sacks 2) Maximum allowable water absorption in a saturated surface 3 . Trenching and backfilling. See 02200
<br /> cement per cubic Yard of concrete) . dry condition: 3% of oven dry weight. C. Reference Standards l
<br /> 3) Grading: I . Published specifications, standards. tests or recommended methods
<br /> B
<br /> 02100 SiTE PREPARATION Sieve Size x Passing Sieve of trade, industry or governmental organizations apply to work of o � '
<br /> 1" 100 this section where cited by abbreviations noted below.
<br /> 115 Selective Clearing 3/4" 90-100 2 . American Sbc)ety for Testing and Materials (ASTM) .
<br /> A. Existing Trees and Shrubs;
<br /> 1. Cut Off existing trees and shrubs not designated for preservation. No. 4 0-100 3. State of California Business and Transportation Agency, Department
<br /> No. 200 of Transportation. 3
<br /> 2. Excavate and remove all roots greater than 2 inches in diameter. 0-2 a. "Standard Specifications' dated January 1981 (CSS) .
<br /> 3. Backfill as specified for structural backfill . b. At Contractor' s Option, Class 2, 3/4' A. B. per Cal trans b. "Materials Manual 1971 (CMM) .
<br /> standard Specifications is acceptable as an alternative 4. 'Standard Specifications for Public Works Construction', 1973
<br /> 02140 DEWATERING to the above, edition, as written by the Southern California Chapter of the
<br /> American Public Works Association (PWSS) .
<br /> 042 Method of Dewatering 5. 'Standard Specifications for Grades of California Redwood Lumber'
<br /> A. Where groundwater is encountered during excavation, stop work and of the Redwood Inspection Service, latest edition (SSRIS) .
<br /> notify Owner promptly. Do not proceed with excavation until so directed 220 Excavation, Backfill , Compacting: D. Paving Application 1
<br /> S
<br /> by Owner. A. Excavation: 1 . Weather: Do not place aspnalt or bituminous materials when the air
<br /> B. The Contractor is responsible for design and construction of any 1 . Excavation Slopes: temperature is below 50 degrees Fahrenheit or during rainfall ,
<br /> required dewatering system at no cost to the Owner. The system shall a. Maximum recommended slopes for excavation and filling are shown 2. Verification of Subgrade Condition: Verify relative compaction
<br /> Perform the following functions: on the drawing. These slopes assume no slope surcharge and of subgrade before proceeding with site paving. Remove and re-
<br /> 1. Remove water from the excavated area.; must be flattened where the cut tends to slough, compact Subgrade in all areas where relative compaction does not
<br /> 2. Remove suspended solids from the groundwater prior to discharge into U. Shore all areas where the slopes are cut steeper than recommend- meet compaction requirements shown in contract documents.
<br /> adjacent storm drains ed. 3. Tolerances: Slone paving uniformly to drainage pattern shown.
<br /> 3. Prevent sloughing of excavated embankments and slopes. 6
<br /> B. Filling and Compaction: Slope minimum 1%, if not shown otherwise, and finish surface so
<br /> 1 , Subgrade preparation in excavated areas under paved areas, that paving will remain free of standing water (bird baths) .
<br /> 02200 EARTHWORK E. Materials FOOD & LIQUOR 37
<br /> areas . 1 . Aggregate Base: Conform to CSS Section 26 requirements for Class 2 T Tom
<br /> a. After excavation is compiete. scarify all excavateq �A/areas aggregate base with 3/4 inch maximum aggregate size, except where l5 West SI♦ G r a nl*
<br /> line .
<br /> 205 Requirements
<br /> under paving to a minimum depth of 6 inches below Plan sub- shown otherwise on drawings. ,'racy, Ca ,
<br /> A. Earthwork: grade elevation.
<br /> 2. Prinz: Coat Material : Conform to CSS Section 93 requirements for t
<br /> 1 . Removal of existing surface and buried inrofovements designated for u. Condition scarified material as required and compact to a Grade SC-250 liquid asphalt except where shown otherwise on drawings,
<br /> removal . minimum relative density of 95% unless shown otherwise on 3 , Surface Course: Conform to CSS Section 39 requirements for 1/2' a
<br /> 2. Site clearing and stripping, drawings . gradation„ Type B, asphalt concrete with the following composition, _
<br /> 3. Site excavation and filling, 2. Subgrade Preparation in areas to receive compacted fill .
<br /> 4, Tank excavation and dewatering a. Reexcept where shown otherwise on drawings: I he Customer Co
<br /> Remove all organic material to firm natural soils. a. Aggregate: Maximum 1/2 inch aggregate size. medium grading. r
<br /> 5. On-Site stockpiling. b. Scarify exposed Subgrade to a minimum depth of 6 inches.
<br /> 6. Rough grading to Subgrade elevation, b. Asphalt Binder: Viscosity grade AR4000 steamrefined asphalt PO. Box 886 Benicia , Ca
<br /> Condition scarified material as required and compact to a conforming to requirements of CSS Section 92.
<br /> 7. Trenching and structural backfill . minimum relative density of 95% unless shown otherwise on
<br /> B. Reference Standards drawings. 6. Wood Headlers: Construction Grade California Redwood (SSRIS) .
<br /> 1 . Published specifications, standards, tests or recommended methods 3. Spreading and Compaction F . Execution
<br /> of trade, industry or governmental organizations apply to work of a. Spread approved fill material in layers not exceeding 8 inches 1 . Base Course: After Subgrade has been compacted to required relative
<br /> this section where cited by abbreviations noted below. in uncompacted thickness. compaction, spread approved base material and compact in accordance
<br /> 2. American Society for Testing and Materials (ASTM) . b. Condition fill material as necessary for optimum compaction. with CSS Section 26. See drawings for required base thickness. SHEET TiTLE
<br /> 3. State of California Business and Transportation Agency . Department c. Compact each layer of fill material using sheeosfoot tamper, 2. After base course has been approved, apply approved prime coat SPECIFICATIONS
<br /> of Transportation. vibratory compactor or other approved compaction equipment. material to the base course surface at a rate of 0.25 gallons of
<br /> a. "Standard Specifications" dated January 1975 )CSS) , d. Compact fill material to a minimum relative compaction as prime coact material per square yard of base surface in accordance
<br /> b. "Materials Manual", 1971 (CCM) . specified in this Section or as noted on drawings. with SCC Section 39.
<br /> 4. "Standard Specifications for Public Works Construction" . 1969 4. Repair of soft spots and defective areas: 3. install wiood headers where shown on plans. REVISIONS DATE
<br /> Edition, as written by the Northern California Chapter of the a. Where soft spots occur in fill areas, remove as directed by 4. Apply apwroved paint binder material to all existing vertical
<br /> American Public Works Association (PWSS) , Owner, scarify, fill and compact as described above . surfaces abutting paving, on all construction joint vertical
<br /> 5. American Association of State Highway and Transportation Officials b. Where excavated areas occur due to reroval of trees, buildings, surfaces in the Paving and over the entire surfaces of all existing
<br /> 'Standard Specifications for Highway Materials and Metnpds of basements or other existing objects, enlarge areas as necessary bituminous material to be overlayed by new asphalt concrete paving.
<br /> Sampling and Testing" , latest edition ( AASHTO ) . for achieveing specified compaction, backfill and compact as Apply paint binder at the rate of 0. 10 gallons per square yard of
<br /> C. Allowable Tolerances specified above. surface covered in accordance with CSS Sections 39 and 94.
<br /> 1 . Finish soil grade tolerances with reference to plan grade at the c. Where fill compaction does not meet specified relative
<br /> completion of rough grading. compaction, remove fill from defective areas and replace and 5. Rollers shall be 8 ton, 2 axle steel tired roller or 5 ton Date Drawn By
<br /> a, Paved areas: plus 0 and minus O. 10 ft. recompact as directed by Owner, vibratory steel tired roller. Smaller portable vibratory
<br /> 5. Overexcavation: Where excavation Is carried below pian depth, plates and AC placement equipment shall only be used in tight Job No. Checked By
<br /> backfill with lean concrete unless otherwise directed by the Owner. inaccesstble areas,
<br /> SHEET
<br /> D. Reference Density: Relative compaction Is referred to ASTM D-1557,
<br /> latest edition. Method. 0 (4 inch diameter mold,. 5 lavers, 25 blows per
<br /> layer, 10 pound hammer, 18 inch drop) . D
<br /> E. Relative Compaction87
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<br /> 1. Slab-on-Grade and Paved Areas: Compact fill and/or exposed {.?k
<br /> subgrade to a minimum relative compaction of 95%, except SEP
<br /> 1165 119987
<br /> OF SHEETS 4
<br /> where shown otherwise on. drawings,
<br /> a
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