7-56
d.Bark mulch shall consist of soft wood bark fragments that have been aged for at least 6 months. Bark mulch shall be free of refuse, physical c ontaminants, material toxic to plant growth, and reprocessed wood products. Bark mul ch shall be a well- graded material conforming to the following: Property Specification pH 4.0 to 8.0 2 inch Sieve Designation 100 percent passing Soluble Salts Content <4.0 mmhos/cm
e.Erosion control mix shall be an organic substance of sourc e separated materials, separated at the point of waste generation that may include; fo rest residues, bark, paper mill flume grit, stump grindings and aged wood waste. Er osion control mix shall be free of refuse, physical contaminants, material toxic to plant growth, and reprocessed wood products. Erosion control mix may contain roc ks less than 4 inches in diameter and shall be a well graded material conformi ng to the following: Property Specification pH 5.0 to 8.0 6 inch Sieve Designation 100 percent passing ¾ inch Sieve Designation 75 to 85 percent passing Soluble Salts Content <4.0 mmhos/cm Organic Matter 20 to 100 percent, dry weight basis
f.Stone mulch shall be clea n native stone free of refuse, ph ysical contaminants, material toxic to plant growth, and limestone. Stone mulch sha ll conform to the following: Sieve Designation Percentage by Weight Passing Square Mesh Sieves ¾ inch 100 ¼ inch 0-10
717.05 Mulch Binder Shall consist of a commercially developed product for the tacking
of hay or straw. Binder shall be free of refuse, physical cont aminants, material toxic to plant growth, or asphalt. Paper fiber mulch may be used as a binder at the rate of 5 lb/unit. Paper fiber mulch shall consist of 100 percent post-consumer newsprin t processed to be applied hydraulically. 717.061 Erosion Control Blankets Shall consist of a machine pr oduced rolled blanket of biodegradable fibers, evenly distributed over the entire area o f blanket, of a consistent thickness, sewn into a biodegradable mesh on the top and bottom surface using a cotton blend thread. The blanket shall remain in place when subject to shear stress of 1.55 lb/ft2. The blanket shall remain intact until grass is established. The blanket shall be a product 7-57 currently listed on the department’s Qualified Products List (Q PL) of Rolled Erosion Control Products. See Section 618.10 - Seeding, Maintenance and Acceptance. 717.063 Ground Anchors Shall consist of metal staples or biode gradable stakes as recommended by the manufacturer of the erosion control blanket to be used.
717.07 Herbicide The herbicide shall be an approved chemical r egistered in the State of
Maine for the required treatment.
717.09 Humus Humus shall be an organic substance meeting the f ollowing:
Property Specification pH 4.5 to 8.0 1 inch Sieve Designation 100 percent passing Soluble Salts Content <4.0 mmhos/cm Organic Matter 35 percent, minimum Dewar Self Heating >5 stability Humus may be a natural peat from sedge, sphagnum or reed origin , or compost from source separated materials that may include leaf and yard trimm ings, food scrapes, food processing residues, manure and other agricultural residuals, o r biosolids. Humus shall contain no visible admixture of r efuse or other physical contam inates or any material toxic to plant growth. SECTION 718 - TRAFFIC SIGNALS MATERIAL
718.01 Vehicular Signal Indications a. Vehicular signal heads for traffic signals and flashing bea cons shall conform to or
exceed the current edition of the ITE "Standard for Adjustable Face Vehicle Traffic Control Signal Heads". Each housing section shall be complete with a o ne-piece, hinged door mounting for the lens and other parts of the optical system, wa tertight gaskets, and simple door-locking device. The optical system shall be mounted so th at the various parts may be swung open for ready access or removal. The sections shall be interchangeable and constructed so that sections can be removed or added. All new traffic signal (vehicular and/or pedestrian) heads shall have light emitting optical asse mblies for all colors. There shall be a round opening in the top and bottom of each he ad to receive 1½ inch supporting pipe frame. All part s of the housing, including the doors and end plates shall be of die cast aluminum free from flaws, cracks, blow holes or oth er imperfections or polycarbonate.
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 761–762 of 817.