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Incidental Construction (600-699)

680WATERPROOFING

PA · 2026 Standard SpecificationsBook pages 738740View official source ↗

804.3(e) 804.3(g) 804.3(e)1 . Use the treatment recommended by the laboratory .

1.Organic Matter . Obtain and test samples according to ASTM D 586. Test samples at an AASHTO

accredited testing facility. Report results to the Department and BSA manufacturer.

(f)Inoculating Legumes. Inoculate leguminous seed, such as Partridge Pea and Showy Tick- trefoil ,

with proper cultures, according to the manufacturer’s directions. Protect inoculated seed from prolonged exposure to sunlight before sowing. Re- inoculate seed not sown within 24 hours. If using hydraulic seeders, use inoculant four times the manufacturer’s recommended rate. If inoculated seed is held in a slurry with fertilizers for more than 1 hour, re- inoculate or apply legumes separately.

(g)Seeding. Apply seeds at a rate according to Table B. Sow seeds uniformly on the prepared areas by

aerial , hydraulic placement, broadcasting, drilling, or hand seeding methods. See Table E for seeding methods. Inspect seeding equipment and calibrate the equipment according to manufacturer recommendations to ensure the specified application rates. Periodically perform a check on the rate and uniformity of application, as directed. Before seed application of each designated seed formula, thoroughly clean- out equipment . Collect all non-applied seed derived from each clean- out event and remove as waste from the project.

TABLE E Seeding Methodology Project Area and Terrain Seed Mix Category Seeding Method Notes Roadside Flat, dry Turf grass (Formulas B, L, T) Grain Drill Seeder, Broadcast, Hydroseed i; ii; iii Roadside Flat, wet Turf grass (Formulas B, L, T) Hand- broadcast, Hydroseed i; ii Slope Dry Native upland mixes (Formulas C, N, P, wildflower & slope enhancements) Hydroseed i Fenceline Flat, dry Native upland mixes (Formulas C, N, P, wildflower enhancements) Native Drill Seeder, Broadcast, Aerial ii; iii Fenceline Flat, wet Native wetland mixes (Formulas R, W) Hand- broadcast, Aerial ii Ditch (within clear zone) Wet Native wetland mixes (Formulas R, W) Hydroseed i Ditch (beyond clear zone) Wet Native wetland mixes (Formulas R, W) Hydroseed, Hand- broadcast i; ii

i.For hydroseeding applications, agitate native seed in the solution, at the lowest setting, for 20 minutes

before application to ensure the seed is mixed properly in the solution. Do not apply using a wood mulch solution. Apply the hydroseed mixture to a maximum depth of 1/2 inch.

ii. For broadcasting or hand seeding applications, divide the native seed mix into two or more batches to ensure the seed is evenly distributed. Apply in parallel, overlapping passes, using a carrier such as sand or the larger annual grass seeds as a visual

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 738740 of 1,522.