Abstract: An artificial turf is disclosed which comprises an outer artificial grass layer having a generally uniform exterior playing surface. A deflection layer is disposed below the artificial grass layer. The deflection layer has a prescribed height to provide resiliency for absorbing impact shocks from foot traffic and playing on the artificial grass layer. The deflection layer has a plurality of interstices providing open passages for water drainage; and loose particles are dispersed into the interstices of the deflection layer up to a prescribed level to provide stability and enhance shock absorption so that the deflection layer deflects when the artificial grass is impacted to assist in absorbing the impact and maintain normal playing action of the playing surface of the artificial grass layer.

Abstract: An underground fluid exchange system for control of delivery of fertilization, irrigation and pesticides to and removal from a selected fully encapsulated the turf area of a playing field, including golf course green, having a selected soil profile including a combination turf and topsoil turf segment, a porous soil segment and an impervious soil segment wherein the fluid exchange system comprises a bi-flow porous conduit having uniform porosity that has a selectable exchange rate.

Abstract: An apparatus and method for controlling ground water flow within a contaminated soil zone. A constant head moat is created surrounding the contaminated volume by digging a trench encircling the volume. A closed loop pipe, slotted or perforated, is laid in the bottom of the trench and serves to cause a constant hydraulic head around the perimeter of the zone. This prevents ground water movement into the zone. An upward gradient is created within the zone by trees, plants or mechanical pumps to move ground water inward and upward. Leaching or movement of contaminants out of the zone is minimized or eliminated.

Abstract: A process for conditioning a golf green which preferably is constructed in accordance with the specifications of the United States Golf Association. In this process, air is blown at a flow rate of from about 250 to about 1000 cubic feet per minute onto the top surface of the golf green while simultaneously withdrawing air from said vent side of the main feeder line at a flow rate of from about 250 to about 1,000 cubic feet per minute.

Abstract: An underdrain pipe has a pipe wall in which wall portions rectangular in section and wall portions circular in section are disposed alternately in a longitudinal direction of the pipe, in which a number of water collecting small holes are formed in portions of the pipe wall, and in which the whole of the pipe wall is formed of material of synthetic resin or rubber.

Abstract: Underground cavities containing liquid contaminants are remediated by drilling directionally through the cavity and then pulling back pipe with a slotted section extending through the cavity. The pipe is supplied on reels in lengths much longer than in the prior art, thus avoiding the joining by butt welding of successive short lengths of pipe as in the prior art. Slots are preferably cut parallel to the axis of the pipe or at a angle in respect to the axis instead of being cut radially as in the prior art, so that a much greater portion of the pipe circumference remains joined together, thereby substantially increasing the axial strength of the pipe.

Abstract: A fluid drainage and filtering system composed of stocked in-drains and spacers wrapped serpentine fashion with a non-woven fabric of fluid pervious material. Each in-drain has a dimpled core sheet defining spaced lands and surrounding valleys and a thickness related to the pitch distance between these lands. Each spacer has outer sheets of about 1/2 the thickness of the core sheet, but also having lands surrounded by valleys. The pitch distance of the lands in these outer sheets is also about 1/2 that of the thicker core sheets so the spacers and in-drains do not tend to nest into one another when the system is installed.

Abstract: An improved method for constructing filter underdrain systems may be provided which uses prefabricated underdrain cells. The prefabricated underdrain cells may have a one piece construction having side walls and a bottom. The side walls may include a porous plate support ledge with a ridge at the center of the ledge. The ridge helps ensure that the sealant forms a uniform and effective gasket when the porous plates are installed.

Abstract: A liquid distribution device for connection to a sewage disposal system comprising a manifold pipe having an inlet and a plurality of outlets, the inlet being oriented for connection to a source of liquid sewage effluent, and the outlets each being oriented for connection to a lead or header line in a drainfield of the system, the outlets being substantially coplanar with each other and with the manifold pipe, and an orifice in each of the outlets for controlling the flow of liquid through the outlets to the absorption lines.

Abstract: In accordance with the teachings of the present invention, a subterranean water and air collection and delivery device for facilitating the collection and delivery of air, natural ground water, manually supplied water, and/or pressurized water from an irrigation system to the roots of plants is provided. The device includes a plastic enclosure member including a plurality of apertures and having an interior volume within which water and air is collected and redirected. A porous insert member is located within the interior volume of the plastic enclosure member and substantially occupies the entire volume for facilitating collection and delivery of water and air while substantially preventing surrounding ground material from entering the interior volume of the enclosure member.

Abstract: A leaching field is constructed from a plurality of rectangularly shaped elongated geotextile covered in-drain core elements provided alongside one another. The elements have equally spaced fold lines extending laterally across their adjacent semi-folded portions so that a stack of such elements in a flattened condition occupies a minimal space whereby these elements can be readily transported to the site. When expanded honey comb configuration is achieved so that a self supporting in-drain structure greatly facilitate construction of the leaching field without the need for templates and the like to support the structure during the filling of the voids between the adjacent in-drain elements themselves. If desired, expendable stakes may be used to support the in-drain assemblies in an optimum configuration.

Abstract: A strap drain material includes a strap having at least a first and a second side and a first and a second end. At least the first side of the material has a plurality of slots arranged in a spaced-apart fashion along a width of the strap and extending along a length of the strap, and a plurality of notches, each of the plurality of notches corresponding to each of the plurality of slots extending from the slots to a surface of the strap. Each notch is sized such that the notch is capable of creating a capillary action and is adapted to draw liquid from outside of the strap and into the slot corresponding to the notch.

Abstract: A connector assembly (20) for connecting expandable slotted tubing (EST) (10) comprises tubular first and second parts (22, 24) for mounting on the ends of respective lengths of slotted tubing. The parts (22, 24) are themselves slotted (26). The free end of the first part defines a male portion (28) and the free end of the second part defining a female portion (30), the free ends of the parts being adapted to engage with one another and to permit expansion of the coupled parts in a corresponding manner to the tubing (10).

Abstract: A subsurface fluid distribution system for sewage effluent and irrigation water utilizes one or more arrays of serially connected leaching chambers. Each leaching chamber is a double-walled construction of arch-shaped cross section with an open bottom and closed ends. A plurality of vertically off-set openings are formed in the inner and outer walls, with the inner openings located at a higher liquid level than the outer openings to prevent clogging of the leaching chambers by either sand or root growth. The leaching chambers are connected to one another to permit fluid communication between adjacent chambers, and are installed below ground in shallow trenches that are backfilled with sand and then topped with top soil. The sewage effluent or irrigation water flows through the array of leaching chambers in an unpressurized flow.

Abstract: The technical field of the invention is that of building and public works, for example for lining the vertical walls of a building on the inside and/or on the outside, or for recovering water infiltrating through the ground in a plot. The present invention provides a closed insulating box in the form of a flat rectangular parallelepiped having two main faces in register which are spaced apart by four "lateral" faces. According to the invention, the six walls of the outer envelope of the box are rigid, thin, and made of a strong material, and at least one of the main walls is perforated by microholes, the main faces being interconnected by at least one internal stiffener, and the inside volume defined by the envelope is filled with rigid fragments of a granular material of cellular structure, and of relative density less than 1, and also having good thermal insulation properties.

Abstract: The subterranean liquid distribution or liquid routing apparatus utilizing a housing having a wall portion forming an inner chamber. The housing includes inner and outer surfaces, the former defining the inner chamber of the housing. A plurality of apertures in the wall portion of the housing permit communication with the inner chamber and allow liquids to pass either into or out of the inner chamber. At least a pair of protuberances extend from the inner surface of the wall portion of the housing in contact one another to prevent collapsing of the housing chamber. An opening is also found to the housing chamber in spaced relationship to the plurality of apertures which generally serves as the drainage or source of the liquid being distributed by the apparatus.

Abstract: A partition structure having a screen includes a pair of main wall members disposed in parallel to each other with a predetermined interval, a pair of side wall members connected at end portions thereof to the end portions of the pair of main wall members to connect said main wall members to each other and provide a partition space defined by said main wall members and said side wall members, and one or more spacer members disposed in said partition space and fixed to said main wall members to hold the main wall members in positon. At least a part of at least one of the main wall members and the spacer members being a screen. The partition structure may further include a top member and a bottom member closing the partition space, and a communicating tube communicating with the partition space through the top plate.

Abstract: A flexible supply line to connect media transporting underground supply lines includes a metal corrugated bellows, a connection member at each end of the metal bellows and a flexible wrap wrapped along the metal bellows and the connection members. The invention also includes a method for attaching the wrap to the metal bellows.

Abstract: The invention features a multiple compartment drainage conduit with a plurality of diverter pipes connected thereto. The conduit is generally triangular in shape making leveling and burying less labor intensive, and resulting in less settling of fill material. The attached plurality of diverter pipes discharge a portion of the conduits' flow during periods of heavy rainfall or flooding, preventing a backup at the conduit inlet. The multiple compartment conduit includes a plurality of knock out plugs for the connection of diverter pipes at desired locations. Snap connections at opposite ends of the conduit are provided so that plural conduits can be interconnected.

Abstract: A water impervious, elastomeric coating is applied to the outer surface of a foundation wall and across the joint between the lower end of the wall and the footing. Protection board is bonded to the elastomeric coating and serves to prevent damage to the coating during backfilling of the foundation wall. The protection board is composed of an impact resistant, extruded, thermoplastic material and has inner and outer faces connected together by a series of parallel spaced ribs which define vertical channels that extend the height of the board. A plurality of spaced isolated holes are formed in the outer face of the board and communicate with the channels. The board not only protects the elastomeric coating from damage, but the inner face provides an additional waterproofing membrane, and the holes and channels facilitate movement of water to the drain tile and relieve hydrostatic pressure on the wall.

Abstract: A system is disclosed for draining water from a location external to a structure, the system located internally of structural members forming a part of the structure. The system includes block members having internal openings for receiving a length of perforated pipe and cavities forming reservoirs for pooling of water and transfer into the pipe via the perforations.

Abstract: There is provided by the invention a subsurface drainage system which promotes efficient and controlled subsurface drainage of fluids, such as irrigation water, applied to the surface of land such as a football field. A drain core apparatus is provided that provides rapid infiltration and later movement of subsurface fluids, but which is resistant to settling, compacting and crushing. The drain core is a thermoplastic mat having crush-resistant support members integrated with and upon a backing grid which holds the support members in spaced relation to one another. Fluid flowing into and through the drain core is collected and stored in a fluid storage container. The fluid storage container is adapted to be buried beneath the ground, and has an easily assembled internal support structure composed of vertically layered thermoplastic mats. The mats permit fluids to flow freely within the container, and yet lend vertical and structural stability to the container.

Abstract: The endplate of an arch shape cross section leaching chamber for dispersing liquid in soil has an inlet duct which enables the pipe delivering liquid to the chamber to be at higher elevation than the top of the chamber. Liquid flowing from the duct is guided downwardly by a channel and onto an integral baseplate extending into the chamber, to lessen any erosion of the soil within the open bottom of the chamber. Preferably, the endplate has double walls which, with sidewalls, form the channel. And, a slot opening near the bottom of the inner wall discharges the liquid into the chamber interior.

Abstract: A water drainage and collection system and method of construction thereof is disclosed. The system includes a graded channel and a water impervious liner secured within the channel along the channel's wall surfaces. A plurality of scrap tire components are positioned within the channel and on top of the liner. The system includes a drainage reservoir formed at a low point in the channel. The surface water percolates through and around the scrap tire components, runs down the grades of the liner, and collects within the reservoir. A pumping station(s) cooperates with an irrigation system to recycle the water and chemicals back to the surface of the golf course or the like. The result of the system being the collection, storage, and recirculation of water and chemicals used to maintain the field area.

Abstract: Integral conduits to disburse fluids along their length, fabricated out of two materials, and a method for manufacturing such structures with permeable wall parts; characterized by extruding a profile of thermoplastic material with a lengthwise extended slitted wall (10), and where this longitudinal slit is being outfitted with a permeable material consisting of one or more layers of fabric (12, 13, 13A, 13B, 14); the sides of the fabric strips being imbedded and sandwiched in the thermoplastic wall of the conduit, lengthwise along both sides of the slit; resulting in a hollow conduit with a lengthwise extended permeable wall section. Additionally, predetermined sections of the permeable fabric can be coated to block fluid emission from these selected sections (17, 19, 21). Fabrics of varying porosity are used to control emission of fluid. A longitudinal reinforcing element (23) may be captured within the structure (24) for securement purposes.

Abstract: A drain piping for forming buried drainage fields is formed from a flexible plastic pipe having periodically spaced restricted water flow orifices. Around the flexible pipe at each orifice is placed a larger diameter section of highly perforated drain pipe forming a drain cell; the cell is wrapped with a porous plastic cloth wrap (e.g. GeoTextile.TM.--a known membrane cloth for preventing dirt migration). This pipe can be directly buried in dirt filled trenches; no special drainage provisions, such as crushed stone are required. Each cell individually fills with and drains waste water and sludge. The inventive pipe can be laid in uneven terrain, including areas win which the water table may rise above the level of some sections of pipe. Even if drainage is temporarily blocked form one cell, the pipe will properly drain through the other cells.

Abstract: An underground drainage system comprising piping and storage tanks (4) made from perforated wall modules (8) to form the desired size and configuration, which is wrapped in a water permeable geotextile (9). The system is preferably buried in clean sand (10 ), whereby rainwater and runoff water is directed to flow through the water permeable geotextile (9) through the perforated wall modules (8) and into the piping (4) where the thus filtered water can travel along the piping (4) to flow back through the walls of the piping (4) into the first available strata where the surrounding ground is not saturated.

Abstract: This invention relates to the manufacture of flexible porous plastic aeration pipe having an essentially uniform porosity throughout its length. The plastic pipe of this invention has a gas permeable wall of thermoset polymer particles and thermoplastic binder for the particles with a substantially uniform plurality of micropores through the wall of about 0.001 inch to 0.004 inch along its length for diffusion of gas therethrough and transfer to a medium. The thermoset polymer particles have a mesh size of about 60 to about 140 mesh, preferably approximately 80 to 100 mesh. The method of manufacture includes volumetric delivery of thermoset polymer particles and thermoplastic binder particles to a mixing chamber for preblending and then controlled volumetric feeding of the preblend into an extruder to form the porous aeration pipe.

Abstract: In accordance with the teachings of the present invention, a subterranean water collection and delivery device for facilitating the collection and delivery of natural ground water, manually supplied water, and/or pressurized water from an irrigation system to the roots of plants is provided. The device includes a plastic enclosure member including a plurality of apertures and having an interior volume within which water is collected and redirected. A porous insert member is located within the interior volume of the plastic enclosure member and substantially occupies the entire volume for facilitating collection and delivery of water while substantially preventing surrounding ground material from entering the interior volume of the enclosure member.

Abstract: A protective body/cover (1) to be placed over water/air openings on underground pipes (2). The cover is two-legged and has openings at two opposite ends to permit a pipe (2) to be passed through. Water from openings in the pipe moves towards shaped walls/projections (3), which lead the water to drip (4) through air (10) and fall to the ground (5), approximately directly under the pipe (2). The side walls on the bottom part of the cover have plates/feet (6) which prevent the pipe from sinking down into the ground. At the ends of the protective body/cover (1) there are provided slots or holes (8) with inserted pins/plates (9) which secure the pipe (2) and prevent it from being pushed down. Under the cover there will be formed an air-filled space (10) through which the water drips. Interior vertical walls (7) in the lower part of the cover (1) will be kept dry on the inside and prevent the plants' roots from growing up the wall in their search for the water source (4).

Abstract: A concrete slab and wall spacer with water and radon removal elements. The invention includes a cross-sectionally, L-shaped elongate strip of semi-rigid, nonbiodegradable material. At least halfway up the entire elongate vertical leg of the L-shape is a horizontally disposed projection which is integral with the strip. The spacer projection is placed against a wall, the L base resting on a portion of the footing subtended by the wall in a conventional spacer usage. The underside of the base of the L is generally relieved in order to allow transmigration of water and gaseous substances. Several applications for the strip are disclosed, one being the sealing of the shelf to the abutting wall with placement of a gas impermeable membrane in an overlapping arrangement with the L base so as to form, relative to the strip and the abutted wall, an upper fluid region and a lower gas region.

Abstract: The present invention provides a collection tank for use under the floor slab of a building or slab on grade for collecting ground water from the surrounding soil and from weeping tiles. The collection tank comprises a collection tank having an upper tank portion and a lower tank portion, a plurality of perforations in the upper tank portion of the containment tank portion for receiving ground water, a plurality of cut-out ports in the outer wall of the upper tank portion of the collection tank each for receiving an end of a respective weeping tile line, an overflow port for communicating excess water to an overflow line, and a pump for pumping water in the collection tank to a location external of the collection tank. The collection tank also includes one or more collection tank extensions which can be added to the top of the collection tank to ensure that the weeping tile lines, when connected, are positioned at the proper angle to ensure efficient water flow into the collection tank.

Abstract: Large leaching chambers having hollow ribs are formed by gas assisted injection molding. The ribs have stepped cross sections with hollow bases and narrower solid upper parts. When the chamber wall is corrugated, as characterizes a typical arch shape cross section leaching conduit, hollow ribs on opposing sides of the wall are positioned to connect to each by means of holes in the undulating walls. Hollow ribs are narrowed along their length and where they interconnect, alleviating problems distortion and shrinkage problems. And, the chamber wall which surrounds the injection molding sprue is thinner than the typical wall, to avoid hollowing there.

Abstract: An elasticized geosynthetic panel, geofoam composition and method operable for permitting controlled deformation of earth materials adjacent a rigid earth retaining structure or the like. The panel includes a drainage component. a water and gas membrane and a compressible geofoam member. The compressible geofoam member is elasticized and exhibits a cross-anisotrophic characteristic which has enhanced elasticity in a direction normal to the geosynthetic panel.

Abstract: Disclosed is a rigid polymer foam board suitable for use in a foundation insulation system. The foam board has a face defining a plurality of grooves therein which traverse in a crossing, diagonal configuration. The groove configuration facilitates the application of insecticides/termiticides in foundation insulation systems employing rigid foam boards on the exterior of the foundation.

Abstract: A concrete slab and wall spacer with water and radon removal elements. The invention includes a cross-sectionally, L-shaped elongate strip of semi-rigid, nonbiodegradable material. At least halfway up the entire elongate vertical leg of the L-shape may be a horizontally disposed projection which is integral with the strip. The spacer projection is placed against a wall, the L base resting on a portion of the footing subtended by the wall in a conventional spacer usage. An spacer may be provided for additional support of the L-shaped strip. This spacer is easily removable after the floating slab has set, or the spacer may be left in place for use as a decorative molding. Several applications for the strip, are disclosed, one being the sealing of the shelf to the abutting wall with placement of a gas impermeable membrane in an overlapping arrangement with the L base so as to form, relative to the strip and the abutted wall, an upper fluid region and a lower gas region.

Abstract: A spandrel supporting an upper story upon a lower story of a construction having exterior and interior walls bounding a site for collecting water seepage through the porosity of the brick construction material of the exterior wall, on which spandrel there is a waterproofing membrane to confine the water seepage to the space between the walls and a porous drainage fabric to drain excessive water to the exterior and as to nominal seepage to allow air flow through the drainage fabric to cause its evaporation.

Abstract: A drip irrigation system employs a low-pressure head of about 11/2 to 2 psi preferably by storage of water in a tank providing a column head of about 54 in. Header pipes extending into the field from the column are formed with holes at intervals. For each hole there is a flexible fitting having an end which fits into the header hole with a water-tight fit and has a short nipple at its opposite end. Then plastic tubing (e.g. about 0.001 to 0.002 thick high density polyethylene of approximately 11/4 inch diameter when expanded and formed with holes of about 0.001 to 0.00025 inch diameter at about 24 to 28 holes per foot) is taped to the nipple.

Abstract: An earth drain comprising a core consisting of an elongated flexible web having on at least one surface thereof, and preferably on both surfaces, an array of discreet projections spaced transversely across the width of the web, and longitudinally in the lengthwise orientation of the web. The array of projections is interrupted by a plurality of elongated projection-free zones extending in the longitudinal direction of the web, and spaced transversely across the width of the web. A filter of sheet-like water permeable material encases the core, and is adapted to be maintained in spaced relationship to the web by the free ends of the projections thereon.

Abstract: Drip tape for below or above ground irrigation includes a sheet of material formed into a tube by overlapping opposite side edges of the sheet and bonding the side edges along a longitudinal seam thereby forming a primary flow path. A strip of transparent material is bonded to an interior surface of the sheet prior to seaming, at a location remote from the longitudinal seam so as to define, in combination with the tape wall, a plurality of secondary flow paths within the primary flow path. Each secondary flow path includes an inlet region, a turbulence inducing region and an outlet region; the inlet region including a plurality of inlets in the second strip connecting the primary flow path to the secondary flow path upstream of the turbulence inducing region; the outlet region including an outlet in the tube connecting the secondary flow path to atmosphere downstream of the turbulence inducing region.

Abstract: A method for manufacturing preassembled drainage line units comprises feeding a length of perforated vent pipe along a direction of manufacture longitudinally through a tubular mandrel, feeding a continuous sleeve of netting concentrically over the vent pipe along the direction of manufacture from a front end of the mandrel and continuously supplying quantities of artificial aggregate into the space between the sleeve of netting and the vent pipe. A low friction coating is applied to the inside surface of the mandrel to reduce the surface friction of the artificial aggregate caused by compaction, and to permit high speed manufacture.

Abstract: A clamping mechanism for removably attaching a fabric to a foraminous element having generally a plank shape. A form-drain is a hollow, foraminous, plank-shaped conduit. The clamp of the invention is a semi-rigid strip of material such as polyvinylchloride. From the strip depend orthogonal projections which form, in a first model, a U-form of shallow definition; this is the "cap" model and is used to capture a fabric between it and the top surface of the form-drain. An alternate embodiment realizes the same strip with depending orthogonal studs (as projections). Projections of both embodiments include mechanisms to impede retrograde motion of the clamp once it is installed on the form-drain. In anticipation of changes to the form-drain, alternate models of the invention have been presented.

Abstract: A structure having at least one layer (3.1), for example three layers (3.1, 3.2, 3.3), of a number of juxtaposed sheet blocks, in which the sheets are shaped so as to define between themselves a series of vertical cells for water storage, and a series of horizontal cells in the height of the blocks for water drainage. The horizontal cells communicate with the vertical cells. The structure is light, inexpensive, easy to install without requiring heavy handling means, and is especially useful in underground water reservoirs.

Abstract: Disclosed is a rigid, thermoplastic foam board useful in below-grade residential and commercial insulating and drainage applications. The board defines a plurality of oriented channels extending therein along the board. The channel extends into the board through a relatively narrow first opening at the face into a relatively wide first zone. The channel then further extends into the board from the first zone through a relatively narrow second opening into a second zone. The board provides superior water drainage, and protects a below-grade building wall from excessive moisture. Further disclosed is a method for using the foam board in below-grade applications.

Abstract: Irrigation apparatus includes a feeder line connectible to a source of pressurized water, and an outer line of larger diameter than, and enclosing, the feeder line to define an annular water chamber between them. The outer line includes a plurality of irrigation devices spaced along its length communicating with the water chamber. A plurality of pulsator devices are spaced along the length of the feeder line and connect the feeder line to the water chamber.

Abstract: A leaching field is prepared by fitting together segments of PVC pipe in the manifold configuration that defines a plurality of outlets, each outlet having a unique in-drain configuration with an internal core and external non-woven geotextile fabric envelope. The method calls for supporting these relatively flexible in-drains with a template while space between the in-drains is filled with sand or the like. In a further embodiment each of the in-drains is fitted with a stand pipe that is useful to backflush the in-drains periodically.

Abstract: The present invention concerns a drainage network, which is characterized by the fact that said drainage network is a network for ground constructions equipped with drainage belts with which a three-dimensional drainage network system for diverting water can be formed in the ground, thereby providing rain water and underground water accumulated in the ground a means to be drained for the purposes of alleviating hydraulic pressure exerted on the ground, increasing ground stability and preventing earth movements from occurring in the construction site.

Abstract: A basement wall is formed by a series of vertical metal studs supported at their lower ends on a metal sill extending along the upper face of a concrete footing. An insulating sheathing is mounted on the metal studs to form the wall outer surface. The sheathing is formed by two panel layers of rigid foam core insulator material. Edges of the inner panels are offset from the edges of the outer panels to form labyrinth seals preventing migration of ground water through the sheathing.

Abstract: A rigid, thermoplastic foam board useful in below-grade residential and commercial insulating and drainage applications. The board defines a plurality of oriented channels extending therein along the board. The channel extends into the board through a relatively narrow first opening at the face into a relatively wide first zone. The channel then further extends into the board from the first zone through a relatively narrow second opening into a second zone. The board provides superior water drainage, and protects a below-grade building wall from excessive moisture. Further disclosed is a method for using the foam board in below-grade applications.

Abstract: Apparatus for treating the soil of a grass playing field that includes a piping system containing perforated pipe lines seated in a distribution bed beneath the soil of the playing field. A blower having a discharge port and a suction port is selectively connected to the duct networks to either pump air upwardly or draw air downwardly through the soil profile. A separator is connected in the air supply line of the system for removing water from the air stream moving between the blower and the duct network. The removed water is collected in a holding tank for recycling, or disposed of in an environmentally safe manner.