RecDoc 2016-104272 STMMA (849 Veterans)

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C . 3 S T O R M W A T E R TECHNICAL GUIDANCE open-graded aggregate base materials with sufficient thicknesses and compaction that spread and minimize applied vertical stresses from vehicles. • Pervious concrete and porous asphalt materials require narrow aggregate grading to create open voids in their surfaces. Materials choice is therefore a balance between stiffness in the surface layer and permeability. PICP requires similar types of aggregate (without cement or asphalt) placed in the joints, typically ASTM No. 8, 89, or 9 stone depending on the paver joint widths. Refer to industry association literature for grading recommendations for all surfaces. • Paving units for PICP should conform to the dimensional tolerances, compressive strengths and absorption requirements in ASTM C936. Paving units subject to vehicular traffic should be at least 3 1/8 in. thick. DESIGN AND INSTALLATION • All designs should be reviewed and approved by a licensed civil or geotechnical engineer or as directed by the municipality. • Design for pervious concrete shall be reviewed by the concrete manufacturer or National Ready Mixed Concrete Association (NRMCA) (www.nrmca.oru), or as directed, the municipality. Consult Portland Cement Association publication, Hydrologic Design of Pervious Concrete (2007) available from www.cement.orq. • Design for porous asphalt should be reviewed by the asphalt manufacturer, the National Asphalt Pavement Association (NAPA) (www.porousasphalt.net), or as directed by the municipality. Consult NAPA publication, Porous Asphalt for Stormwater Management (2008) for additional information on design, construction, and maintenance. • Design for PICP should be reviewed by the concrete paver manufacturer, the Interlocking Concrete Pavement Institute (ICPI) (www.icoi.orq), or as directed by the municipality. Consult !CPI publication, Permeable Interlocking Concrete Pavements 4th Edition (2011 ) for additional information on design, construction and maintenance. • Installation of pervious concrete, porous asphalt and PICP should be done by contractors who have constructed projects similar in size to that under consideration. • For pervious concrete, only contractors with certification from NRMCA should be considered, and such contractors should have at least one foreman with this certification on the job site at all times. More information can be found at www.concreteparki ng.orq. • For PICP, it is recommended that only contractors holding a certificate of completion in the Interlocking Concrete Pavement Institute's PICP Installer Technician Course should be considered and such contractors should have at least one foreman with this certificate on the job site at all times. More information can be found at www.icpi.orq. • All new pavements should have a minimum surface infiltration rate of 100 in./hr when tested in accordance with ASTM C1701 . • Protect excavated area from excessive compaction due to construction traffic and protect the finished pavement from construction traffic. CHAPTER 6 6-31 ATTY/AGR.2016.231/849 Veterans RWC, LLC - STMMA