A) Item #1 – Item #9: High-Density Polyethylene (HDPE) Pipe in nominal diameters of 12” – 60” for use in gravity flow, non-pressure storm drainage applications. High-Density Polyethylene (HDPE) Pipe designed and manufactured from virgin compounds conforming to cell classification of AASHTO M252, Type S or SP or AASHTO M294, Type S/SP or ASTM F2306; Item #10 – Item #24: High-Density Polyethylene (HDPE) Pipe in nominal diameters of 4” – 60” for use in gravity flow, non-pressure Storm Drainage applications. High-Density Polyethylene (HDPE) Pipe designed and manufactured from virgin and recycled polyethylene compounds conforming to cell classification of ASTM F2648; Item #25 – #33: Polypropylene (PP) Pipe in nominal diameters of 12”–60” for use in gravity flow, non-pressure Storm Drainage applications. Polypropylene (PP) Pipe production shall be impact modified copolymer meeting the material requirement of ASTM F2881, Section 5 and AASHTO M330, Section 6.1...
