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	SECTION 02795
	POROUS PAVEMENT SYSTEM
	** NOTE TO SPECIFIER ** PRESTO GEOSYSTEMS (Presto Products Co) Geoblock Porous Pavement System.
	** NOTE TO SPECIFIER ** This section is based on the products of PRESTO GEOSYSTEMS, which is located at: PO Box 2399 Appleton, Wisconsin 54912-2399 Toll Free (800) 548-3424 Phone (920) 738-1707 Fax (920) 738-1222 E-Mail: info@prestogeo.com Website: www.prestogeo.com [ Click Here ] for additional information. This section covers PRESTO GEOSYSTEMS Geoblock Porous Pavement System. The system provides vehicular and pedestrian load support over grass areas while protecting grass from harmful effects of traffic. In addition, the system can be used as a permeable load support system with the appropriate aggregate infill. The major components of the complete system are the Geoblock unit, engineered base support soil where needed, selected topsoil, aggregate or other suitable and appropriate infill, and selected vegetation (where applicable). Consult PRESTO GEOSYSTEMS for assistance in editing this section for the specific application.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete any paragraphs below not applicable to project.
		A.	Porous pavement system.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required.
		A.	Section 02300 - Earthwork.
		B.	Section 02700 - Bases, Ballasts, Pavements, and Appurtenances.
		C.	Section 02800 - Site Improvements and Amenities.
		D.	Section 02900 - Planting.
		E.	Section 02920 - Lawns and Grasses.
	1.3	SYSTEM DESCRIPTION
	** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others or edit as required. Vehicles should be limited to vehicles with a maximum tire pressure of 90 psi.
		A.	Provides vehicular and pedestrian load support over grass areas, while protecting grass from harmful effects of traffic.
		B.	Provides a permeable load support structure for vehicular or pedestrian traffic with an open aggregate or other suitable infill.
		C.	Major Components of the Complete System:
			1.	Geoblock units.
			2.	Engineered base support soil, if required.
			3.	Selected topsoil, open aggregate or other suitable infill.
	** NOTE TO SPECIFIER ** Delete the following paragraph below if vegetated units are not required.
			4.	Selected vegetation.
	** NOTE TO SPECIFIER ** Edit the following paragraph as required for project. Consult with manufacturer for additional information.
		D.	Both the Geoblock unit and base support soil work together to support an imposed loading as follows:
			1.	Support gross vehicular loads of ________ lbs (________kg) maximum.
			2.	Support gross pedestrian loads of ________ lbs (________kg) maximum.
	** NOTE TO SPECIFIER ** Delete the following paragraph below if vegetated units are not required.
		E.	Both the Geoblock unit and topsoil contribute to vegetation support.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Submit manufacturer's product data.
		C.	Shop Drawings: Submit manufacturer's shop drawings including laying pattern and anchoring.
	** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
		D.	LEED Submittals: Provide documentation of how the requirements of Credit will be met:
			1.	List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.
			2.	Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.
		E.	Samples: Submit manufacturers sample.
		F.	Certificates:
			1.	Product certificates signed by the manufacturer certifying material compliance of polyethylene used to make Geoblock units.
			2.	ISO Certification certifying manufacturer's quality management system is currently registered to ISO 9001:2000 quality standards.
		G.	Installation Instructions: Manufacturer's printed installation instructions. Include methods for maintaining installed products.
		H.	Manufacturers warranty.
	1.5	QUALITY ASSURANCE
		A.	Manufacturer ISO Certification: ISO Certification certifying manufacturer's quality management system for its Geoblock system is currently registered to ISO 9001:2000 quality standards.
		B.	Manufacturer's Field Representative Qualifications: Experienced in the installation of the specified products.
	** NOTE TO SPECIFIER ** Retain subparagraphs below if required to suit project. Delete if not required.
		C.	Installer Qualifications: Experienced in performing work of this section who has specialized in installation of work similar to that required for this project.
		D.	Preinstallation Meetings: Conduct meetings to verify project requirements, subbase conditions, and manufacturer's installation instructions. Require attendance of parties directly affecting work of this section, including the contractor, engineer, installer, and manufacturer's representative. Comply with Division 1 requirements.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Delivery: Deliver materials to site in manufacturer's original, unopened containers and packaging, with labels clearly identifying product name and manufacturer.
		B.	Storage: Store materials in accordance with manufacturer's instructions.
		C.	Handling: Protect materials during handling and installation to prevent damage.
	1.7	WARRANTY
		A.	Warranty: Manufacturer's two year limited warranty.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: PRESTO Geosystems PO Box 2399, Appleton, Wisconsin 54912-2399. Toll Free (800) 548-3424. Phone (920) 738-1328. Fax (920) 738-1222. Web:www.prestogeo.com.
		B.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	** NOTE TO SPECIFIER ** Delete paragraph above or below; coordinate with Division 1 requirements.
		C.	Substitutions: Not permitted.
	** NOTE TO SPECIFIER ** Select the products required for the project from the following paragraphs and delete those not required.
	2.2	GEOBLOCK UNITS
	** NOTE TO SPECIFIER ** Geoblock 5150 provides vehicular and pedestrian load support over grassed areas and can be installed over an engineered base for a given applied load.
		A.	Geoblock 5150:
			1.	Materials:
				a.	Polyethylene: Up to 97 percent recycled materials.
				b.	Color: Ranges from dark shades of gray to black
				c.	Color Uniformity: Uniform color throughout all units in pallet.
				d.	Chemical Resistance: Superior.
				e.	Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent.
			2.	Dimensions:
				a.	Nominal Width by Length: 20 inches by 40 inches (0.50 m by 1.00 m).
				b.	Nominal Depth: 2 inches (50 mm).
				c.	Nominal Coverage Area: 5.38 square feet (0.50 m2).
				d.	Cells per Unit: 72.
				e.	Cell Size: 3.1 inches by 3.2 inches (79 mm by 81 mm).
				f.	Top Open Area per Unit: 87 percent.
				g.	Bottom Open Area per Unit: 41 percent.
				h.	Interlocking Offset Tabs: 12 tabs per 40 inches (meter). Tab system on all edges of unit.
				i.	Weight: Nominal weight per Unit: 9.0 pounds (4.0 kg).
				j.	Maximum Unit End-to-End or Side-to-Side Warpage: 0.24 inch (6 mm).
			3.	Runoff: Runoff Coefficient at 63.5 mm (2.5 inches) Per Hour Rainfall: 0.15.
	** NOTE TO SPECIFIER ** Geoblock 2 provides pedestrian and light vehicular load support over grassed areas and can be installed over a prepared base for a given applied load.
		B.	Geoblock 2:
			1.	Materials:
				a.	Polyethylene: Up to 97 percent recycled materials.
				b.	Color: Ranges from dark shades of gray to black.
				c.	Color Uniformity: Uniform color throughout all units in pallet.
				d.	Chemical Resistance: Superior.
				e.	Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent.
			2.	Dimensions:
				a.	Nominal Width by Length: 20 inches by 40 inches (0.50 m by 1.00 m).
				b.	Nominal Depth: 1.2 inches (30 mm).
				c.	Nominal Coverage Area: 5.38 square feet (0.50 m2).
				d.	Cells per Unit: 128.
				e.	Cell Size: 2.25 inches by 2.25 inches (57 mm by 47 mm).
				f.	Top Open Area per Unit: 88 percent.
				g.	Bottom Open Area per Unit: 56 percent.
				h.	Interlocking Offset Tabs: 12 tabs per 40 inches (meter). Tab system on all edges of unit.
				i.	Weight: Nominal weight per Unit: 4.7 pounds (2.1 kg).
				j.	Maximum Unit End-to-End or Side-to-Side Warpage: 0.24 inch (6 mm).
			3.	Runoff: Runoff Coefficient at 63.5 mm (2.5 inches) Per Hour Rainfall: 0.15.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Before beginning installation, verify site conditions are as indicated on the drawings. Notify the Architect if site conditions are not acceptable. Do not begin preparation or installation until unacceptable conditions have been corrected.
	3.2	PREPARATION
		A.	Subgrade:
	** NOTE TO SPECIFIER ** Coordinate paragraphs below with earthwork provided by others. Proper subgrade preparation is required to enable the units to interlock properly and remain stationary after installation.
			1.	Prepare subgrade in accordance with manufacturer's instructions.
			2.	Excavate area allowing for unit thickness and the engineered base depth (where required).
			3.	Provide adequate drainage from excavated area if area has potential to collect water, when working with in-place soils that have poor permeability.
			4.	Ensure in-place soil is relatively dry and free from standing water.
			5.	Uniformly grade base.
			6.	Level and clear base of large objects, such as rocks and pieces of wood.
		B.	Base Preparation:
	** NOTE TO SPECIFIER ** Coordinate paragraphs below with base installation provided by others. The strength of the porous pavement system is determined, in part, by the support provided by the engineered base. Consult Presto Products for engineered base details and thickness recommendations. Proper engineered base materials will promote vegetative growth and provide required structural support. If the topsoil is not present within the engineered base, grass growth may be impaired.
			1.	Prepare engineered base in accordance with manufacturer's instructions, if engineered base is required.
			2.	If required, place a geotextile separation layer between the natural ground and the 'engineered base'.
			3.	Place engineered base to a thickness of:
				a.	200 mm (8 inches).
				b.	150 mm (6 inches).
				c.	100 mm (4 inches).
				d.	50 mm (2 inches).
				e.	__ mm ( _ inches).
			4.	Place engineered base of clear stone or crushed rock, homogenously blended with topsoil.
			5.	Ensure aggregate portion of base is free from fines and has 30 percent or more void-space when compacted. Aggregate should range in size from 10 to 25 mm (0.375 to 1.0 inch).
			6.	Add and blend topsoil before placement equal to void percentage in aggregate.
			7.	Compact the mixture to a 95 percent proctor density.
	3.3	INSTALLATION
		A.	Install and infill units in accordance with manufacturer's instructions.
		B.	Installing Units:
			1.	Place units with square hole to ground.
			2.	Place units with long direction of unit perpendicular to direction of traffic. Ensure final seam pattern has seams perpendicular to traffic flow straight and seams parallel to traffic flow staggered. Using half units where required for pattern by field cutting a full unit. Lay units is the following pattern:
	** NOTE TO SPECIFIER ** Select bond pattern required and delete paragraphs not required.
				a.	Install unit pattern as indicated on the Drawings.
				b.	Standard running bond bricklayer pattern for access lane applications.
				c.	Herring bone pattern for large area with random traffic flow.
			3.	Cut units with a hand or power saw to custom fit contours and around obstructions.
			4.	Ensure required traffic load transfer and support.
	** NOTE TO SPECIFIER ** Units must be fixed in place and protected during the installation process, if construction traffic causes movement of the units or large temperature changes occur. If the units are placed between two perpendicular stationary edges, allow for potential thermal expansion of the units by keeping the units away from the stationary edge. Joint separation could occur and rejoining of separated units may be required. Once a healthy turf is developed, the root system will provide all necessary anchoring of the system.
			5.	Place first row of units against a stationary edge, when available.
			6.	Slide units together so interlocking tab joint is fully engaged. Units should not protrude above desired surface elevation.
			7.	Prevent units from shifting during installation as follows:
				a.	Temporary wood stakes or permanent metal stakes through holes in units.
				b.	Thread-forming tapping screws through perimeter interlocking tabs.
	** NOTE TO SPECIFIER ** Select the required infill system from the following paragraphs. If both systems are required indicate the location of each on the Drawings.
		C.	Infilling Units - Vegetated Systems:
			1.	Infill units with suitable topsoil immediately after units are installed to minimize potential for joint separation.
			2.	Spread topsoil infill uniformly over the units to a level even with the top of the cell wall.
			3.	Use spreading methods to prevent over-compaction of cell infill.
			4.	Topsoil: As specified in Section 02920 - Lawn and Grasses.
		D.	Infill Units - Non-vegetated Systems:
			1.	Infill units with an open aggregate or other suitable infill material ensuring the aggregate particle size and gradation are suitable for the intended use.
	** NOTE TO SPECIFIER ** Other suitable infill material may include bark / wood chips, rubber chips, crushed shells, and soils not intended to be vegetated.
			2.	Spread the infill uniformly over the units. A minimum of 1 inch (25 mm) of infill materials should be maintained over the top of the Geoblock cell walls.
	3.4	DELINEATION
	** NOTE TO SPECIFIER** The following paragraph is applicable to vegetated and non-vegetated systems. With vegetated systems, once healthy turf has been established, the Geoblock cell wall structure will have minimal visibility when good turf-maintenance practices are followed. Delineation may be desirable to create greater visibility for those using the access lanes.
		A.	Delineate the installed Geoblock system with the following method:
			1.	In-ground curbing.
			2.	Above-ground curbing.
			3.	Shrubbery or vegetation.
			4.	Perimeter lighting.
			5.	Delineation markers.
			6.	____________________________.
	** NOTE TO SPECIFIER ** The following paragraphs are applicable to vegetated systems. Delete the remaining paragraphs if not required.
	3.5	SEED AND GRASSING
		A.	Finish in accordance with manufacturer's instructions.
	** NOTE TO SPECIFIER ** Select seeding or sodding from the following paragraphs. Delete the paragraphs not required. Specify sod for areas where immediate use is desired. Young sod that is free from netting materials is recommended. Mature sod with a more developed root system and sod with netting may be difficult to press and cut into the cells.
		B.	Seeding:
			1.	Follow good seeding, fertilizing, and watering procedures for turf establishment based on regional practices.
			2.	Increase watering frequency when free draining base materials are used.
			3.	Seeding: As specified in Section 02920 - Lawns and Grasses.
		C.	Sodding:
			1.	Sweep out topsoil to allow room to seat the sod.
			2.	Install young sod free from netting materials.
			3.	Press sod into partially emptied cells using a roller or other suitable equipment and follow normal watering procedures.
			4.	Sodding: As specified in Section 02920 - Lawns and Grasses.
	** NOTE TO SPECIFIER ** Fertilize, water and cut regularly to encourage root growth and development.
	3.6	MAINTENANCE
	** NOTE TO SPECIFIER ** Normal turf care procedures should be followed, including de-thatching and aerating. Some equipment may slightly scar or cut the Geoblock wall structure during some operations, but will not affect overall structural integrity of the system. Coordinate with Section 02920.
		A.	Maintain grass in accordance with manufacturer's instructions and as specified in Section 02920 - Lawns and Grasses.
		B.	Reset any units that may have shifted due to temperature or construction operation.
		C.	Normal turf care procedures should be followed, including de-thatching and aerating. Some equipment may slightly scar or cut the Geoblock wall structure during some operations, but will not affect overall structural integrity of the system.
		D.	When snow removal is required, keep a metal edged plow blade from coming in contact with the surface during plowing operations to avoid causing damage to the Geoblock units.
	END OF SECTION