8625 3RD AVE SE 2025-03-24 - Laserfiche WebLink

DIVISION 09 MATERIALS 9-14 EROSION CONTROL AND ROADSIDE PLANTING 9-14.1 Topsoil Section 9-14.1 is supplemented with the following: All soil shall be protected from all sources of additional moisture at the Supplier, in covered conveyance, and at the Project site until incorporated into the Work. Soil placement and compaction will not be allowed when the ground is frozen or excessively wet, or when the weather is too wet as determined by the Engineer. When the Contract specifies testing by a Contractor provided testing laboratory, the laboratory must be an STA, AASHTO orASTM or other designated recognized standards organization accredited laboratory with certification maintained current. The laboratory must be capable of performing all tests to the designated recognized standards specified and will provide test results with an accompanying Manufacturer's Certificate of Compliance. 9-14.1(1) Topsoil Type A Section 9-14.1(1) is supplemented with the following: Topsoil A shall consist of 2/3 sandy loam and 1/3 Soil Amendment. Sandy loam or loamy sand shall consist largely of sand, but with enough silt and clay present to give it a small amount of stability. Individual sand grains can be seen and felt readily. On squeezing in the hand when dry, it shall form a cast that will not only hold its shape when the pressure is released but shall withstand careful handling without breaking. The mixed soil shall meet the following gradation: Percent Sieve Size Passing (weight) 1 inch 100 '/2 inch >95% No. 10 >70% The mixed soil shall have a pH from 5.0 to 6.5 with dolomitic limestone added as necessary to attain this range. Soil Amendment shall be per Section 8-02.3(6). END OF SECTION 9-14 Alderwood Water&Wastewater District W2301 Trans Main 1 &2 Valve Replacement 9-01/5 Contract No. W2301 October 2023