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3877.1 SCOPE <br />This Specification covers topsoil material used as a medium for establishing and sustaining healthy plant growth. <br />3877.2 REQUIREMENTS <br />Topsoil material furnished under this Specification shall be obtained from the soil horizons normally designated as "A" or <br />"B" as defined by the Soil Science Society of America, or shall be obtained from alluvial deposits. The material shall meet <br />the requirements given herein for the several classifications defined. <br />A Topsoil Borrow <br />Topsoil borrow for general use as a turf growing medium shall meet the requirements of Table 3877 -1: <br />TABLE 3877 -1 <br />TOPSOIL BORROW REQUIREMENTS <br />Minimum Maximum <br />Material Passing 2.00 mm ( #10) Sieve 85% <br />Clay 5% 30% <br />Silt 10% 70% <br />Sand & Gravel 10% 70% <br />Organic Matter 3% 20% <br />pH 6.1 7.8 <br />B Select Topsoil Borrow <br />Select topsoil borrow for use as a plant growing medium in designated areas, such as landscape beds, shall meet the <br />requirements of Table 3877 -2: <br />TABLE 3877 -2 <br />SELECT TOPSOIL BORROW REQUIREMENTS <br />Minimum Maximum <br />Material Passing 2.00 mm ( #10) Sieve 90% <br />Clay 5% 30% <br />Silt 10% 70% <br />Sand & Gravel 20% 70% <br />Organic Matter 3% 20% <br />pH 6.1 7.5 <br />Extractible Phosphorous 30 kg/hectare <br />(26.8 lbs /acre) <br />Exchangeable Potassium 150 kg/hectare <br />(133.8 lbs /acre) <br />Soluble Salts <br />3877 <br />Topsoil Borrow <br />0.15 siemens /m <br />(1.5 mmho /cm) <br />