641LOAM

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of collecting and preparing loam material encountered in the work or obtained from other sources,

and placing the material at the locations shown on the plans or ordered, including necessary excavation for placing loam. Materials

2.1Loam shall consist of loose friable topsoil with no admixture of refuse or material toxic to plant growth. Loam shall be fr ee

of viable parts of prohibited invasive plants listed in Table 3800.1 of part AGR 3800. Loam shall be generally free from stones, lumps, stumps, or similar objects larger than 2” in greatest diameter, subsoil, roots, and weeds. The term as used herein shall mean that portion of the soil profile defined technically as the “ A” horizon by the Soil Science Society of America. The minimum and maximum pH value shall be from 5.5 to 7.6. Loam shall contain a minimum of 3 percent and a maximum of 10 percent of organic matter as determined by loss by ignition. Not more than 65 percent shall pass a No. 200 sieve as determined by the wash test in accordance with ASTM D 1140. In no instance shall more than 20% of that material passing the No. 4 sieve consist of clay size particles. 2.1.1 Natural topsoil not conforming to 2.1 or containing excessive amounts of clay or sand shall be treated by the Contractor to meet those requirements. Construction Requirements

3.1The loam shall be spread upon the previously prepared subgrade surface to the depth of 4” ± 1/2” unless otherwise specified

and shall be raked carefully to remove all objectionable materials. Loam shall be spread in such a manner as to establish a loose, friable seedbed. In order to maintain a consistent grade, loam placed adjacent to lawns or where directed shall be compacted with a roller weighing approximately 100 pounds per foot of roller width. All depressions exposed during the rolling procedure shall be filled with additional loam, and rolled. Method of Measurement

4.1Loam will be measured by the cubic yard as determined by actual surface measurements of the lengths and widths of the

loamed areas multiplied by the depth specified. Measurements will be made to the nearest 0.1 of a cubic yard. Basis of Payment

5.1The accepted quantities of loam of the various depths specified will be paid for at the Contract unit price per cubic yard

complete in place.

5.2Materials used for treating natural topsoil as in 2.1.1 will be subsidiary.

Pay item and unit: 641. Loam Cubic Yard

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of furnishing and applying limestone on areas shown on the plans or ordered.

Materials

Limestone shall be a calcic or dolomitic ground agricultura l limestone containing not less than 95 percent of either calcium

or magnesium carbonate, or both. It shall conform to the standards of the Association of Official Agricultural Chemists and shall comply with all State and Federal rules and regulations. 2.1.1 Sieve analysis. A minimum of 40 percent shall pass a No. 100 sieve, and a minimum of 95 percent shall pass a No. 8 sieve. 2.1.2 Packaging. Limestone shall be furnished in new, clean, sealed, and properly labeled bags , of not more than 100 lb. each, with the following information clearly marked thereon:

2.1.2.1 Caked or otherwise damaged limestone may be rejected.

2.2Other liming materials may be used if permitted.

Construction Requirements

Limestone shall be used when ordered, to raise the pH of the soil, at a rate determined by the Engineer in accordance with

Table 642-1. Table 642-1 - Limestone Required to Raise Soil pH to a Minimum pH of 5.5 Limestone to Be Added Existing Soil pH Tons/Acre Pounds/Cubic Yard

4.0 - 4.4 3 12 4.5 - 4.9 2 8 5.0 - 5.4 1 4

3.2Limestone shall be applied by either the dry or hydraulic methods specified in 644.3.5.

Method of Measurement

Limestone will be measured by the ton, in accordance with 109.01, on the basis of delivery slips forwarded to the Engineer,

but not to exceed the rate ordered. Measurements will be made to the nearest 0.01 of a ton. Basis of Payment

The accepted quantity of limestone will be paid for at the Contract unit price per ton complete in place.

Pay item and unit: 642. Limestone Ton