Schedule C - Specifications.docx

Request for Proposal No. 200000001424 DNR Milliken State Park Topsoil Delivered and Dumped in One Location

SCHEDULE C

SPECIFICATIONS

SECTION 329100 - TOPSOIL

GENERAL

SUMMARY

A. This section specifies all soil materials designated as "Topsoil" in Schedule A – Statement of Work. Supply topsoil for landscape work from off-site sources and provide at the construction site as stipulated below.

REFERENCES

B. ASTM International, as referenced herein as ASTM.

C. US Department of Agriculture (USDA) Handbook No. 60 – Diagnosis and Improvement of Saline and Alkali Soils.

SUBMITTALS

D. Source Quality Control:

Material Test Reports: Conduct Topsoil testing for imported topsoil from off-site sources.

Sample: Provide 1-quart samples for each topsoil test unit (including source).

Conduct all topsoil sampling and testing prior to delivery from off-site.

E. Field Quality Control:

Submit field test reports as listed in Article 3.1.

QUALITY ASSURANCE

F. Qualifications:

Soil-Testing Laboratory Qualifications: The contractor shall engage an independent laboratory or university laboratory, recognized by the State Department of Agriculture, with the experience and capability to conduct the testing indicated and that specializes in types of tests to be performed.

PROJECT CONDITIONS and COORDINATION G. The Contractor agrees to provide, transport and deliver the specified topsoil to the site located at 1900 Atwater, Detroit, MI 48207.

H. The Contractor agrees to unload the topsoil into stockpiles at the flat area at the base of the berm, inside the perimeter fence as directed by the DNR.

I. The DNR is installing and maintaining an aggregate drive to connect Atwater Street to the stockpile location. The Contractor agrees to remain responsible for any damage to private or public property as a result of the delivery of topsoil.

J. The Contractor agrees to remain responsible for the cleanup of any soil material tracked onto local streets and sidewalks.

K. The DNR will aid the Contractor in flagging traffic and pedestrians during the process of accessing the site; however, the Contractor shall not unduly block or prohibit the use of local streets and sidewalks.

L. Delivery of the topsoil will be coordinated with the DNR to ensure the timely supply of materials, and not constrict construction activities.

M. The earthmoving for the project is being completed by workers from the Department of Natural Resources (DNR), who will spread the topsoil onto the existing subgrade.

PRODUCTS

MATERIALS

N. Topsoil:

Topsoil for landscape work shall be a fertile, friable, sandy loam surface soil without admixture of subsoil. Topsoil does not need to be screened through a mechanical plant but must be free of stones larger than 2 inches in any dimension, stumps, trash, debris, and other materials deleterious to plant growth.

Particle Size Distribution of Topsoil:

a. Percentages shall be based on dry weight of the sample.

The pH range shall be 6.5 to 8.4. Topsoil that does not meet this pH range shall not be approved by the Landscape Architect.

Organic content shall not be less than 4 percent and not greater than 20%.

SOURCE QUALITY CONTROL:

O. Laboratory Test Reports:

The Contractor agrees to conduct topsoil testing for each soil test unit as follows:

a. Existing off-site location(s): 1 sample per acre of site to be excavated.

b. On-site soils shall not be utilized in accordance with the Due Care Plan.

Submit all test reports as an attachment with proposal in SIGMA VSS for Landscape Architect approval. Topsoil units that do not meet the soil requirements specified under this section will not be permitted for use as Topsoil.

Fertility: For each unamended soil type, test topsoil for organic materials, pH, phosphate, potash content, calcium, magnesium, zinc, iron, and manganese.

Physical Properties: Determine percent sand, silt and clay and textural classification (USDA) by hydrometer method. Identify all foreign materials such as rock, roots, and vegetation.

Supplemental Testing: Report presence of problem salts, minerals, or heavy metals, including but not limited to aluminum, arsenic, barium, cadmium, chromium, cobalt, lead, lithium, and vanadium. If such problem materials are present, provide additional recommendations for corrective action. If any heavy metal exceeds state listed background levels for human contact, soils will not be approved for use on site.

Recommendations: Based on the test results, the independent testing laboratory shall state recommendations for soil treatments and soil amendments to be incorporated. List recommendations in weight per 1000 square feet for turf area and volume per cubic yard of planting mix. Recommendations shall include; nitrogen, phosphorus, and potash nutrients and all soil amendments to be added to produce the specified topsoil material satisfactory for the long-term growth of the specified plants and turf.

EXECUTION

FIELD QUALITY CONTROL

P. Sampling: Each sample shall be a composite of five to seven subsamples taken the full depth of proposed source for each acre of surface area. Topsoil test reports shall be accompanied with each sample unit for review and approval by the Landscape Architect.

Q. Testing methods and written recommendations when not referenced elsewhere, shall comply with USDA's Handbook No. 60. Nutrient data to be given in parts per million (ppm) dry soil.

R. Topsoil shall be as defined in ASTM D5268.

S. Soil pH shall be tested in accordance with ASTM D4972.

T. Test for organic material by using ASTM D2974.

END OF SECTION

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