S01 12FPC120Q0039 Amend1 Att2-11CS426Topsoiling58_25ThirdAveExt_REVISED 7_14_2020.docx.pdf

Method 2-The total surface covered by topsoil, except the surface area of embankments, levees, dikes, and other earthfills not included for payment, is measured and the area(s) computed to the nearest square yard.

Payment for topsoil spread on the surface of embankments, levees, dikes, and other earthfills is included in the measurement and payment for that item of earthfill where topsoil application occurred.

Method 3-For items of work for which specific unit prices are established in the contract, the volume of topsoil furnished and spread is computed to the nearest cubic yard by the method of average cross sectional end areas from surveys of the excavated topsoil stockpile or, if not stockpiled, cross-sectional surveys of the borrow area(s). Payment for furnishing and spreading topsoil is made at the contract unit price.

Method 4- Payment for placement of topsoil is to be included in the lump sum contract price and is not a separate bid item.

7. Items of work and construction details

Item 3 - Shall be by Method 2. See below for more details on topsoil requirements.

Item 5 - Spreading shall be by Method 1 or Method 2.

Item 2 - The topsoil shall be the natural or cultivated top layer of the soil profile or manufactured topsoil; containing organic matter and sand, silt, and clay particles; friable, pervious, and black or a darker shade of brown, gray, or red than underlying subsoil; reasonably free of subsoil, clay lumps, gravel, and other objects more than 1 inch in diameter; and free of weeds, roots, and toxic and other nonsoil materials. It shall be substantially free of weed seeds and stones 1" or larger in any dimension.

pH range shall be between 6.5 to 7.5 with 3-10% organic matter.

Topsoil Source: Reuse surface soil stockpiled on-site. Verify suitability of stockpiled surface soil to produce topsoil. Clean surface soil of roots, plants, sod, stones, clay lumps, and other extraneous materials harmful to plant growth. Supplement with imported topsoil from off-site sources when quantities are insufficient. Obtain topsoil displaced from naturally well-drained construction or mining sites where topsoil occurs at least 4 inches deep; do not obtain from agricultural land, industrial sites, bogs or marshes.

Imported topsoil must meet the residential direct exposure criteria and the GB Pollutant Mobility Criteria under Connecticut's Remediation Standard Regulations (RSRs) (as identified in Appendix A to secMns 22a-133k-1 through 22a-133k-3 of the Regulations of Connecticut State Agencies). Contractor must test one sample from borrow area for the following:

D PAHs by USEPA Method 8270 D RCRA 8 metals

□ Organochlorine Pesticides by Method 8081

□ Volatile organic compounds by Method 8260 Laboratory analytical results must be submitted to the COR for review and approval of topsoil material prior to use.

Finished graded· and compacted topsoil shall be 6" minimum thickness.

Top soil only needs to be applied to disturbed areas such as the foot print of removed structures.

Item 6 - Measurement and Payment shall be done according to the lump sum method 4.

NRCS 3/2018

CTEWPP·FPE

426-2