868COMPOST BLANKET AND COMPOST FILTER BERM

868.1DESCRIPTION—This work is furnishing, placement , and maintenance of a compost blanket or

compost filter berm erosion and sedimentation pollution control system.

868.2MATERIAL—

food, stump gri ndings, and yard or wood/bark organic matter sources – aerobically composted with no objectionable odors. The compost product should not resemble the raw material from which it was derived. Wood and bark chips, ground construction debris, or reprocessed wood products are not acceptable as the organic component of the mix. Provide compost meeting the compost standards for compost filter berm contained in the DEP Erosion and Sediment Pollution Control Program Manual :

• Moisture content, dry weight basis 30% - 60%

• pH 5.5 to 8.5

• Soluble salt concentration (electrical conductivity) maximum 5.0 dS/m

• Manufactured inert contaminants, dry weight basis Less than 1%

• Organic matter content, dry weight basis 25%-100%

• Particle size, % passing 3/8 inch size sieve, dry weight basis 30%-50%

Provide a written statement by the supplier certifying that the compost meets the above requirements. Submit for project -specific, local approval by the Representative (i.e. at the District or project Level) as specified in Section 106.02(a)2.c.

compost systems.

868.3CONSTRUCTION—As shown on the Standard Drawings, as indicated, and as follows:

of large unworkable soil clumps, debris, large rocks, and undesirable woody matter such as stumps. Track soil surface before compost application with equipment capable of working perpendicular to the slope gradient to create soil indentations that will hold compost. Avoid excessive soil compaction during this operation.

apply compost in direct-flow drainage channels such as ditches or the centerline of swales. Apply compost approximately 3 feet beyond and overlapping all edges of the bare soil surfaces designated to receive the compost.

2.a Application Rate.

• Surfaces to be seeded up to 2:1 slope – 270 cubic yards/acre or 2 inches depth with ± 1/2 inch tolerance.

• Surfaces not to be seeded up to 2:1 slope – 540 cubic yards/acre or 4 inches depth with ± 1/2 inch tolerance.

compost flow stream during the compost application, or apply the seed in a separate surface applied operation. Apply seed at twice the seeding rate indicated in Section 804.2(b)2, Table A, for the designated seed formula. Test and verify the specified application rates for the equipment used. Soil supplements and separate mulch application are not required.

otherwise. Routinely inspect blanket for any material dislodgement. Replace and redress any dislodged material and reseed if necessary. Control any noxious weeds with approved herbicides meeting the applicable requirements of Section 804.3(l). Leave compost blanket in place upon completion of the project.

and a berm forming/shaping device, or other appropriate equipment designed to handle compost and form berms. If blower is used, blow compost directly at the soil surface to help settle, compact, and shape the berm. Construct compost filter berm to comply with the requirements of the DEP Erosion and Sediment Pollution Control Program Manual. Construct berm downslope of the earth disturbance on level contour as indicated. Extend both ends of the berm at least 8 feet upslope at 45 degrees to the main berm alignment. Construct a trapezoidal shaped compost filter berm , 2 feet high by 4 feet wide at the base with 1:1 side slopes. Position the berm around the designated disturbed soil areas and parallel to the slope base. Construct berm ends pointing up slope so that the ends are at a higher elevation than the berm body to prevent drainage water from flowing around the ends of the berm. Net or anchor the berm after installation.

any dislodged compost or reshape any collapsed berm areas. Compost may be replaced by hand and tamped into place. Remove built -up sediment retained by the berm when the sediment reaches 1/3 of the height of the berm. Dispose of sediment as specified in the Erosion & Sediment Control Plan. Replace any compost dislodged by this operation. At completion of project or when directed, leave compost in place by pushing over the berm and spreading the compost material evenly over the adjacent ground to match the contours of the site.

868.4MEASUREMENT AND PAYMENT—