section 02050 - basic site materials and methods part 1 general

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Division 2 - Site Work Section 02050 — Basic Site Materials and Methods 1.6 SOURCE QUALITY CONTROL A. The Contractor shall notify the Engineer prior to delivery of off-site borrow materials for use in site construction. The Engineer may require testing of the off-site soil material. If requested, the testing laboratory shall furnish both the Engineer and Contractor required copies of the test reports. The reports will be considered as sufficient information to accept or reject the proposed imported soil materials. B. If the indicated materials do not meet specified requirements, change material and retest. C. Provide soil and aggregate materials of each designation from same source throughout the Work. D. Provide aggregate from PADOT approved source based upon latest PADOT Bulletin. E. Moisture content for any soil or aggregate material to be used for compacted fill in structural or non-structural areas shall not exceed a range of plus or minus 3.0 percent of optimum moisture content for that particular material. If the moisture contents fall outside of this range appropriate aeration or moisture conditioning measures shall be performed by the Contractor to maintain soil moisture contents within the specified range PART 2 PRODUCTS 2.1 SOIL MATERIALS A. Definitions: 1. Structural Fill Zone: Any area scheduled for building construction, slabs on grade, rigid pavement, flexible pavements, retaining walls, detention basin berms and buffer zones. Structural backfill areas include wall backfill, foundation backfill, and retaining wall backfill zones. All utility trench backfill is considered as a structural fill zone. 2. Nonstructural Fill Zone: Any landscape area that is not included within Structural Fill Zone or the buffer area of the Structural Fill Zone. 3. Buffer Area: Area extending 10-feet beyond the perimeter of any building foundation line, including any areas of future expansion indicated on the Drawings, and 10-feet beyond the perimeter of all other Structural Fill Zones. 4. Soils: Earth or aggregate material. B. General Fill: Inorganic on-site soils that do not contain rock fragments that can pass a sixinch mesh screen and are of suitable moisture content. To the extent that on-site material meets the requirements, such material may be used for General Fill. Provide Imported Fill material required to complete the Work due to insufficient quantity of existing on-site material or unsuitability of existing on-site material. C. Structural Fill: Inorganic on-site soils with a maximum particle size of four inches. To the extent that on-site material meets the requirements, such material may be used for soil material. Provide Imported Fill material required to complete the Work due to insufficient quantity of existing on-site material or unsuitability of existing on-site material. Lebanon School District 02050 - 4 Phase IB - LHS Athletic Field Complex
Division 2 - Site Work Section 02050 - Basic Site Materials and Methods D. Imported Fill: Inorganic well-graded materials with 100-percent of the soil material passing a four-inch mesh screen, at least 25-percent passing a two-inch mesh sieve, and 10 to 49- percent passing a 200 mesh sieve. liquid limit shall not exceed 40 with a maximum plasticity index of 20. Soil material shall classify as SC, SM, SW, GC, GM, or GW according to ASTM D2487. Clean, friable, and highly weathered shall may be utilized only when approved by the Engineer. Use of slag is not permitted. E. Rock Fill: On-site excavated and shot rock fragments not exceeding 24-inches may be used in zones designated by the Engineer. Rock fill is not permitted within the structural fill zone, storm water detention or retention basins, or within six-feet of finished grade. Rock fill and placement shall be in accordance with the recommendations of the Engineer. F. Select Trench Earth Fill: Material used as structural backfill for utility and storm sewer trenches shall be on-site or imported, clean earth meeting the requirements of Class II or III material, GW, GP, SW, SP, GM, GC, SM or SC in accordance with ASTM D2487. Materials shall have a maximum Plasticity Index of 15 in accordance with ASTM D4318, and shall contain no greater than 20% by weight passing a No. 200 U.S. Standard Sieve. Material shall not contain organic matter and shall be free of frozen materials, rock or gravel larger than 2-inches in any dimension. G. Clay: Material used in constructing low-permeability clay bedding layers or low permeability embankment cores shall be on-site, or imported, clean material classifying as MH, ML, CH or CL in accordance with ASTM D2487. Clay material shall not contain objectionable quantities of debris, roots, and organic matter and shall be free of frozen materials, rock, gravel or coarse fragments larger than 3/8-inch. No less than 70% of the material by weight shall pass the No. 200 U.S. Standard Sieve, at least 25% of the material shall be less than .005 mm particle size, and at least 10 percent of the material shall be less than 0.002 mm particle size. Clay material shall have a Liquid Limit (LL) between 30 and 80 and a Plasticity Index (PI) between 15 and 50, as per ASTM 4318. The clay shall be able to be compacted to the required density specified herein with an associated permeability of lxlO -7 cm/sec or less according to ASTM D5084. H. Topsoil: Friable loamy soil (as classified by the U.S. Department of Agriculture Handbook No. 18, Soil Survey Manual); free of subsoil, roots, grass, weeds, stone, and foreign matter; acidity range (pH) of 5.5 to 7.5; containing a minimum of 3 percent and a maximum of 10 percent organic matter. No more than 15 percent by weight shall be larger than a No. 10 U.S. Standard Sieve. a. To the extent that on-site material meets the requirements, such material may be used for soil material. Provide imported topsoil material required to complete the Work due to insufficient quantity of existing on-site material or unsuitability of existing on-site material. I. All imported soil materials must be recovered from approved borrow sources. 2.2 AGGREGATE MATERIALS A. Aggregate material used in site construction shall meet the requirements of PADOT Publication 408, latest edition, Section 703.2, Table C Lebanon School District 02050 - 5 Phase IB - LHS Athletic Field Complex
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section 02050 - basic site materials and methods part 1 general

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