701 SUBSOIL AND TOPSOIL

From MDOT Policy Manual
Jump to: navigation, search
701.01 DESCRIPTION.
Prepare existing topsoil; or salvage and place subsoil and topsoil; or furnish and place subsoil and topsoil in preparation for vegetation establishment. Refer to Section 704 and provide short-term, long-term or permanent stabilization as necessary for soil erosion protection. Performance of Subsoil and Topsoil as specified herein complies with all requirements of the Maryland Department of the Environment for handling and placing soils.
701.02 MATERIALS.
Existing Topsoil       920.01.01
Salvaged Topsoil       920.01.01
Furnished Topsoil       920.01.02
Salvaged Subsoil       920.01.03
Furnished Subsoil       920.01.04
Limestone       920.02.01
Sulfur       920.02.02
Gypsum       920.02.04
Compost, Type A or Type B       920.02.05
Water       920.09.01
Pesticides       920.09.03
701.03 CONSTRUCTION.
701.03.01 General.
(a) Schedule. Perform subsoil and topsoil operations when soil moisture and weather conditions are suitable. Cease operations when soil is muddy, frozen, or otherwise unsuitable.
(b) Pesticide Application. For any work involving existing or salvaged soils, the ContractorAny person having a Contract with a procurement agency. Contractor does not include an employee with an employment Contract, or an employee organization with a collective bargaining agreement. shall possess a Maryland Department of Agriculture Commercial Pesticide BusinessA corporation, partnership, individual, sole proprietorship, joint venture, or any other legal entity through which commercial activity is conducted. License and a Pesticide Applicator Certificate for the pertinent pesticide application Category: (2) Forest; (3-A) Ornamental Plant Exterior; (3-C) Turf; (5) Aquatic; (6) Right-of-Way and Weed.
Apply pesticides in conformance with the Maryland Pesticide Applicator’s Law, OSHAOccupational Safety and Health Administration and MOSH regulations, and the manufacturer’s label and Safety Data Sheets (SDS).
Ensure that pesticides are applied by a Maryland Certified Pesticide Applicator, or by a Registered Pesticide Applicator under the supervision of a Certified Pesticide Applicator.
(c) Prohibited Weeds. Refer to 920.01.01. Areas of existing topsoil, and areas of topsoil and subsoil to be salvaged and their stockpiles, will be inspected and shall be free of prohibited weeds. Control prohibited weeds as needed and as directed.
(d) Herbicide. To control prohibited weeds, and to remove vegetation when preparing existing topsoil, apply glyphosate 3% solution in water or submit a written request to use another herbicide or application rate.
(e) Pesticide Application Reporting. Record the location and details of pesticide applications on the Pesticide Application Reporting Form. Submit the Form within 24 hours after applying pesticides.
(f) Nutrient Management Plan (NMP). The AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02. will develop a NMP based upon soil tests. The NMP application rates for soil amendments and fertilizer will be within the ranges shown in the pertinent table of application rates.
Conform to the application rates of the NMP. Do not apply soil amendments when no NMP has been developed. Do not apply soil amendments to subsoil or to furnished topsoil.
(g) Nutrient Management Reporting. Record the location and details of soil amendment and fertilizer applications on the Nutrient Management Reporting Form. Submit the Form within 24 hours after applying soil amendments and fertilizer.
701.03.02 Existing Topsoil. Refer to 920.01.01.
(a) Vegetation Removal. Refer to 701.03.01(d). Cut brush and groundcover vegetation, remove debris, and apply herbicide as necessary to prepare areas for seeding or other specified vegetation installation. Do not injure trees, shrubs and other plants to remain.
(b) Compost and Tilling. Refer to 701.03.01(f) and Table 1. Spread Type B Compost over the soil surface as specified in the NMP and lightly till soil to prepare soil and incorporate compost. Immediately install seeding or other vegetation as specified in the Contract documents.
SUBSOIL AND TOPSOIL

TABLE 1 - SOIL AMENDMENT APPLICATION RATES & MIXING

SOIL AMENDMENT & MIXING APPLICATION RATEa
Compost - Existing Topsoil

Spread Type B Compost over surface of existing topsoil and lightly till into soil.

Up to 0.25 in. depth compost spread over surface of existing topsoil Up to 34 CYCalendar Year compost per acre of existing topsoil
Compost - Salvaged Topsoil

Thoroughly mix Type A or Type B Compost into salvaged topsoil before placing topsoil.

Up to 1.0 CYCalendar Year compost per 6.0 CYCalendar Year of salvaged topsoil Up to 0.17 CYCalendar Year of compost per 1.0 CYCalendar Year of salvaged topsoil
Gypsum

Spread gypsum over surface of existing topsoil, or over surface of placed salvaged topsoil, and till to mix gypsum into upper 2 in. of topsoil.

Up to 0.721 LB gypsum per SY of existing topsoil or placed salvaged topsoil Up to 3500 LB of gypsum per acre of existing topsoil or placed salvaged topsoil
Limestone

Spread limestone over surface of existing topsoil, or over surface of placed salvaged topsoil, and till to mix limestone into upper 2 in. of topsoil.

Up to 1.446 LB limestone per SY of existing topsoil or placed salvaged topsoil Up to 7000 LB of limestone per acre of existing topsoil or placed salvaged topsoil
Sulfur

Spread sulfur over surface of existing topsoil, or over surface of placed salvaged topsoil, and till to mix sulfur into upper 2 in. of topsoil.

Up to 0.165 LB sulfur per SY of existing topsoil or placed salvaged topsoil Up to 800 LB Sulfur per acre of existing topsoil or placed salvaged topsoil
a Note:

For existing topsoil and salvaged topsoil, the application rates will be specified in the Nutrient Management Plan (NMP) included in the Contract documents. Do not apply soil amendments except as specified in the NMP. Do not apply soil amendments to subsoil or to furnished topsoil.

701.03.03 Salvaging Soils.
(a) Vegetation Removal. Remove vegetation, brush, and other debris from areas where topsoil and subsoil will be salvaged.
(b) Soil Removal. Remove topsoil and subsoil to the depths as specified or as directed. Transport salvaged topsoil and subsoil separately, and keep them apart from other materials.
(c) Stockpiles. Construct stockpiles on well drained land, away from streams, drainage areas and floodplains as specified in Section 308. Maintain stockpiles of salvaged topsoil and salvaged subsoil away from other materials, and separate from each other.
Refer to Section 704 and apply Temporary Mulch or other stabilization as necessary for soil erosion protection immediately after constructing stockpiles. Refer to 308.03.29 and install perimeter sediment controls.
Maintain stabilization and sediment controls. Refer to 701.03.01(c) and control prohibited weeds as needed and as directed.
(d) Weed Inspection. Refer to 701.03.01(c) and ensure that inspection is completed and that prohibited weeds are controlled before removing vegetation, preparing soil, or transporting soil from stockpiles.
(e) Soil Preparation and Transportation.
Subsoil. Transport and place salvaged subsoil per 701.03.04 when directed.
Topsoil. Refer to Table 1. Mix compost in conformance with the Nutrient Management Plan and transport and place prepared salvaged topsoil per 701.03.05 when directed.
701.03.04 Placing Subsoil.
(a) Site Preparation. Ensure the site where subsoil will be spread is uniformly graded true to line and cross section.
(b) Spreading. Spread and compact subsoil in layers up to 8 in. thickness to provide a firm and uniform subsoil base. Ensure that subsoil is spread to the specified depth.
(c) Tracking. Track subsoil on slopes 4:1 and steeper with cleated track equipment operated perpendicular to the slope. Check subsoil thickness, lines, grades, and elevations to ensure the completed work is as specified.
(d) Debris. Remove stones and other debris with a length or width greater than 4 in. from the surface of the subsoil.
(e) Topsoil and Stabilization. Refer to 701.03.05 and immediately place topsoil over subsoil, or refer to Section 704 and provide stabilization as necessary for soil erosion protection.
701.03.05 Placing Topsoil.
(a) Site Preparation. Ensure the site where topsoil will be spread is uniformly graded true to line and cross section, and that the surface of the subsoil base is loose and able to provide a suitable bond for the topsoil layer to be spread.
If the subsoil base is crusted or excessively compacted, then roughen and loosen the surface of the subsoil base with approved machinery before spreading topsoil.
(b) Spreading. Spread topsoil over the designated areas and lightly firm the topsoil to ensure uniform thickness of the specified depth, and to meet the required grades.
(c) Tracking. Track topsoil on slopes 4:1 and steeper with cleated track equipment operated perpendicular to the slope.
(d) Grading Adjustment. When placing topsoil for grading adjustment, the minimum thickness shall be 1/2 in. and the maximum thickness shall be 8 in.
(e) Firming. Ensure that topsoil is uniformly firmed near sidewalks, structures and pavement edges, and that the topsoil surface is without gaps, mounds, depressions, soft spots, or areas that may impair surface drainage or future maintenance. Check topsoil thickness, lines, grades, and elevations to ensure the completed work is as specified.
(f) Soil Amendments. Refer to 701.03.01(f) and Table 1. Apply soil amendments to topsoil in conformance with the Nutrient Management Plan.
(g) Tilling. Refer to Table 1 and till topsoil to incorporate soil amendments and prepare areas for seeding or installation of other specified vegetation.
(h) Debris. In areas within 10 feet of the pavement edge and near commercial and residential property, remove stones, wood, metal, and other debris with a length or width greater than 2 in. from the topsoil surface when spreading is completed. In all other areas, remove debris with a length or width greater than 4 in., or as directed.
(i) Stabilization. Immediately perform Turfgrass Establishment, or install other permanent vegetation as specified in the Contract documents, or refer to Section 704 and install Temporary Mulch or Temporary Seed for soil erosion protection.
701.03.06 Inspection and Acceptance. Submit a request for Acceptance when operations are completed. Inspection will be conducted to verify that operations were completed as specified. Acceptance will be granted at that time.
701.04 MEASUREMENT AND PAYMENT.
Subsoil and topsoil will be measured and paid for at the Contract unit price for one or more of the specified items. The payment will be full compensation for all material, labor, equipment, tools, disposal fees and incidentals necessary to complete the work.
701.04.01 Existing Topsoil will not be measured and paid for. The cost of preparing existing topsoil, and any cost required for applying soil amendments in conformance with the Nutrient Management Plan, shall be incidental to the pertinent Contract unit price of the specified vegetation establishment.
701.04.02 Salvaging Subsoil and Salvaging Topsoil will not be measured but the cost shall be incidental to the Contract unit price for Class 1 Excavation.
701.04.03 Placing Salvaged Subsoil and Topsoil will be measured and paid for at the pertinent Contract unit price for the specified depth per square yard, or per cubic yard. Any cost required for applying soil amendments in conformance with the Nutrient Management Plan shall be incidental to the pertinent Contract unit price of the specified vegetation establishment.
701.04.04 Placing Furnished Subsoil and Topsoil will be measured and paid for at the pertinent Contract unit price for the specified depth per square yard, or per cubic yard.
701.04.05 Placing Topsoil for Grading Adjustment will be measured and paid for at the pertinent Contract unit price per square yard, or per cubic yard. No payment will be made for topsoil placed less than 1/2 inch depth. Any cost required for applying soil amendments to salvaged soil in conformance with the Nutrient Management Plan shall be incidental to the pertinent Contract unit price of the specified vegetation establishment.
701.04.06 Temporary Mulch, Temporary Seed, Turfgrass Establishment and other permanent vegetation establishment will be measured and paid for at the pertinent Contract unit price per square yard.