Abstract: An underground storage system for hazardous liquids having an inner fluid storage tank surrounded by a larger outer containment vault with sufficient space between to allow for visual inspection of the tank. The inner tank has a rectangular parallelepiped shape and is positioned within an outer rectangular parallelepiped vault in a manner leaving a larger clearance space between two adjacent tank sides and facing vault walls than between the opposite adjacent two sides and walls. Additionally, a vertical clearance exists between the tank and vault. The vault is reinforced concrete precast in sections for ease of transport and assembly on-site. The vault has a bottom pan-shaped unit with one or more square tubular collar units on top and terminates in an upper cover. The cover includes one or more man-way apertures enabling a technician to enter the vault and inspect the tank for leaks. The increased use of excavated space for fluid storage reduces costs associated with transport and installation.

Abstract: An internal fastening band for an internal manhold chimney seal is disclosed, as well as a means for expanding the band and a means for removing the band. One end of the band is narrower than the other end so that when overlapped the ends of the band nest into one another to form a continuous expansion band. The first end portion has a plurality of apertures longitudinally spaced along the fastening band, and a plurality of slots spaced between the apertures and an end of the fastening band. The second end portion also has a aperture along a tab for engaging one of the slots to connect the first end portion to the second end portion with the particular slot being selected to adjust the continuous circular fastening band to a desired diameter. A tool is described for engaging an aperture in each end portion to increase the diameter of the circular expansion band and force the resilient sleeve against the inside surface of the manhole.

Abstract: A sump-riser performing as a collection sump, as a riser for the corresponding tank and as a means for secondary containment for the tank's submersible pump, manway, and fittings. The sump-riser comprises a generally cylindrical sump base with an upright annular lip extending upwardly from an upper support surface; an extension riser including a lower annular riser lip which fits over and round the lip of the sump base; a cover for the extension riser; and an access or observation lid. The riser extension is detachable or removable from the sump base and may be inverted and inserted into the sump base for compact shipping. Score lines may be provided on the riser extension to serve as cutting guides for proper sizing and the sump base may be multi-sided to provide flat walls for accurate hole drilling for pipe and conduit entry.

Abstract: A sealing assembly for sealing a manhole against entering liquid includes a guide ring with an adjustable diameter and set screws for pressing against interior walls of the manhole when the diameter of the guide ring is set to approximately the diameter of the manhole walls, a sealing ring for resting on top of the guide ring and an expandable ring disposed at the inner periphery of the sealing ring and expanded to compress the sealing ring against the walls of the manhole to provide a liquid-tight seal. The sealing assembly also includes a lid positioned on top of the sealing ring. The lid preferably has a removable portion to allow access through the lid without taking the lid off of the sealing ring and without destroying the integrity of the caulking.

Abstract: A molded plastic extension member for use in increasing the height of manholes, or catch basins when surfacing or resurfacing a roadway is described. A wedge to adjust the angle of the catch basin support frame or the manhole cover support frame is also described. The extension includes a pocket for reducing the total surface area of the molded plastic member. It also includes a shoulder that interlocks with either the manhole cone, the catch basin cone, or with other stackable molded plastic members. The extension also contains a planer support surface which provides rigidity and support, and provides a surface for caulking to be applied to form a watertight seal.

Abstract: A roof drain for draining rainwater from a roof. A bell-like strainer is supported by a compression/tension unit including resilient means, which unit is in turn mounted to a drainage sleeve that communicates with a leader. The strainer is secured to the drainage sleeve by a threaded bolt that passes through bores in the strainer and the compression/tension unit, and engages a nut received by the resilient means. Tightening the bolt moves the strainer downwardly into a substantially watertight fit with roofing membrane interposed between a skirt of the strainer and a collar on the drainage sleeve. The resilient means, which may be resilient material, a spring or the like, provides continuous tension between the strainer and the drainage sleeve.

Abstract: An opening and closing apparatus for a manhole cover includes a supporting member 2 having a number of elongated holes 1, two hook rods 4, each having a lower hook, and extending vertically through one of the elongated holes 1 of the supporting member 2, and a bracket 5 through which each hook rod 4 extends. A clamp 6 permits adjustment of the vertical position of each hook rod 4. Two horizontal extension members 8 horizontally adjustably connect to opposite ends of the supporting member 2 so that an upper surface of each horizontal extension member 8 wholly or partially overlaps the supporting member 2. A set of bolts 9 and nuts 10 tightly fasten the supporting member 2 to each horizontal extension member 8. A leg 11 projects downward from an inner end of each horizontal extension member 8.

Abstract: A barrel-shaped manhole frame for receiving a manhole cover is provided with an inwardly directed peripheral flange at its lower end having circumferentially spaced inclined grooves to receive wedges that can be driven in situ into surrounding earthwork to wedge the frame upwardly and thereby adjust its height and slope to conform with a roadway or sidewalk surface under construction.

Abstract: An in-floor access pit unit for use in a floor having a flooring of a predetermined thickness thereon. The access pit basically comprises a rigid liner, a lower frame, an intermediate frame, a cover assembly, and a height adjusting mechanism. The cover assembly comprises an upper frame in which a cover plate is mounted to provide a recess for receipt of a piece of the same flooring material as on the floor in which the access pit is located. The cover assembly is mounted in the intermediate frame by the height adjusting mechanism. That mechanism comprises plural bolts and nuts for adjusting the height of the intermediate frame and the cover member so that the piece of flooring within the cover assembly is flush with the surrounding flooring. The intermediate frame includes a downwardly depending flange which is disposed closely adjacent a sidewall of the lower frame to prevent the ingress of material therebetween.

Abstract: This invention relates to a method of repairing existing manholes and similar structures by applying a fast-curing elastomeric material using spray techniques whereby a homogeneous, non-porous, and monolithic coating or lining is formed. The fast-curing elastomeric material can be applied directly to existing concrete, brick, tile, mortar, and metal surfaces normally found in sewer manholes and catch basins, sewer and drainage pipes, parking decks, bridge piers and footings, holding ponds, bridge trusses, culverts, gratings, and the like and does not require any formwork. The elastomeric coatings provide effective surface protection against wear, corrosion, and water infiltration and can be applied in a single operation to horizontal, vertical, and overhead surfaces.

Abstract: A sparging well borehole has a single pipe extending downwardly in it. The lower end of the pipe terminates in the saturated zone and has orifices for discharging pressurized gas, usually air, which is injected into the saturated zone to liberate volatiles. A layer of impervious material is in the bore hole above the orifices and the hole is filled to the top from above the impervious layer with a porous material. A dome is positioned at the upper end of the borehole with an opening in the dome over the borehole. The dome is connected to a vacuum source to cause the vapor that is produced in the saturated zone and that is induced to migrate through the vadose zone and permeate the porous material in the borehole to be accumulated in the negative pressure interior of the sealed dome and collected for treatment by way of a piping system.

Abstract: In order to prevent the penetration of surface water into a shaft or manhole, the latter is fitted with an insert (5) consisting of a dish-shaped section (9) of impermeable material and the interior space of this dish is connected via connecting ducts (11) with the portion of the shaft or manhole located below the dish (9). The connecting ducts (11) are provided with shut-off devices (12) in the form of spherical floats which act in conjunction with a valve seat (13) to seal off the connecting ducts (11) when the level of liquid in the dish rises (FIG. 1).

Abstract: A habitable structure has a ground-supported, water-impervious floor and upright foundation walls which together define an open top water enclosure. Flooring is supported on the foundation walls essentially covering the open top. Roofing is supported above the flooring so as to define a habitable space between the roofing and the flooring above the enclosure. Various systems for distributing water from the enclosure are disclosed and include the sprinkler system for distributing water outside as well as inside of the structure and heating/cooling systems which can either circulate water from the enclosure as a heat transfer liquid or circulate fluids through water in the enclosure to use the water as a heat sink or heat source.

Abstract: A manway is defined by a cylindrical portion of a vessel wall and is closed by a cover pivotally movable between open and closed positions by means of a hinge mechanism including external brackets on the cover and the wall portion interconnected by a hinge pin. The opposite ends of the hinge pin carry bushings, on which are respectively disposed two torsion springs. Each spring has a vessel wall end portion disposed parallel to the hinge pin, the vessel wall end portions being respectively received in the opposite ends of a coupling sleeve engageable with bearing surfaces on one of the brackets. The other ends of the two torsion springs are respectively disposed generally perpendicular to the hinge pin and are received slidably through eyebolts fixed to the cover bracket.

Abstract: A plastic liner for protecting concrete manhole interior surfaces from corrosion wherein the liner includes provisions for creating a strong mechanical lock between the liner and the interior surfaces. A side of the liner which includes the provisions has a plurality of raised hollow projections with spaced sections. The mechanical lock is created when concrete is poured against the side of the liner with the projections. The concrete at least partially enters the hollow portions and fills spaces between the projection sections. The projections also intersect to enhance the mechanical lock by preventing bulging. Liner sections cover essentially all of the manhole interior surfaces. Forming a liner section by rotationally molding the plastic and cutting gaps into the projections is also disclosed.

Abstract: An Aqua-Blok that fits into a frame or cone of a manhole directly beneath the cover, in the frame below the cover or within the cone to catch water that seeps into the manhole. Aqua-Blok is a polyurea, flexible bowl that rests on the frame directly under the cover or is mounted in frame or the cone. When used in the lower frame, it has a closed cell gasket on its outer top side, and an adjustable stainless steel ring on its inner circumference to press it against the frame. When Aqua-Blok is placed in the cone, it uses a rubber mount placed within the cone to mount Aqua-Blok. The rubber mount has a core with concentric rubber rings on its outer periphery that match the sloped sides of the cone. It has a circular cavity in its inner circumference to receive the pressure ring. The pressure ring forces the core and the concentric rings against the wall of the cone in a watertight fit. The bowl is seated on the mount where it catches any water that flows into the manhole from above it.

Abstract: A water permeable landscape ditch cover comprising a monolithic body with a paved, water permeable surface comprised of a aggregate material and a synthetic resin binder.

Abstract: A manhole cover apparatus including a collar defining an opening with an inner perimeter is provided with a pivotally mounted cover having an outer perimeter greater than the inner perimeter of the collar. A seal is provided to seal between the cover and the collar. Closure structure is provided to secure the free end of the cover to the collar. A threaded bolt is provided to close the cover. A pivotally mounted lever arm is mounted to the bolt for turning of the bolt. An adjustable threaded hinge is provided to adjust the cover in a longitudinal direction relative to the collar. The manhole cover apparatus is useable on pressure containers, such as those used to pneumatically handle particulate material.

Abstract: The present invention involves a flexible annular member passing through a wall opening. The flexible annular member is positioned about a conduit passing through the wall opening to enable the conduit to pass through the wall at an angle up to and even greater than 30.degree.. Another embodiment of the present invention comprises a flange type riser and base connection involving the location of the entire sealing assembly within a chamber base/riser section.

Abstract: A watertight waste water access fitting that is placed below ground level to mate with a pipe from a waste water source and a pipe from a sewer system and with access to its inside from ground level. The fitting is a preformed, polyethylene, one piece hollow body with three formed extensions from the body. Two of the extensions are formed at the bottom sides of the fitting, and one is formed at the top. The bottom side extensions mate with water pipes, and the top extension can be opened to expose the inside of the fitting for maintenance. The bottom extensions are formed of connected segments of decreasing outer diameter with a cutting guide on each segment. The segments can be cut to mate with various diameters of pipe. The top segment has a cap and cutting guide where the cap can be removed by cutting the segment at the cutting guide.

Abstract: A manhole cover comprises a base and a cover. The base has a first inner rim provided with a first bevel while the cover has a second outer rim provided with a second bevel. When the base is joined with the cover, the first bevel of the base and the second bevel of the cover are caused to make contact with each other such that the base is joined with the cover in an airtight and watertight manner. The first bevel of the base and the second bevel of the cover are of such construction that they enable the cover to be lifted easily to set apart from the base.

Abstract: The invention relates to a manhole head assembly of the type having a substantially vertical axis and being intended to be mounted on a conventional manhole member made of non-elastic material. The invention also relates to a manhole ring having an omni-directional upper part and to a method of use of said manhole ring.

Abstract: A drain inlet provides a hollow concrete shell and has a cylindrical bottom section and a square top section. A first opening in the bottom section includes a first lip formed on an interior wall thereof and recessed from the bottom opening. The first lip includes a first step and a second step. A gasket is adapted to fit within the bottom opening and abut the first step. The second step provides a stop for inserting the drain inlet over a riser. A second opening in the top section includes a second lip formed on an interior wall thereof and recessed from the top opening.

Abstract: An adjustable manhole cover support frame that includes a base unit, a top support unit telescopically arranged on the base unit and screw jacks interconnecting the two units permitting selectively adjusting the relative telescopic position of the top unit on the base unit. The base unit has an open ended sleeve projecting upwardly from a flange utilized to secure the base unit to the top end of a manhole vertical conduit. The top support unit has a top annular plate from which depends three cylindrical walls defining a first outer cavity telescopically receiving the sleeve of the base unit and inwardly therefrom a second cavity with holes in the bottom to receive the upper ends of threaded bolts that provide the screw jacks for adjustment.

Abstract: A pipeline system is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through through the primary pipeline of the pipeline system to a product dispenser. The pipeline system includes a secondary containment system for the primary pipeline between the tank and dispenser which includes telescoping pipe sections of different diameters. The telescoping piping is installed around the primary pipeline and the pipe sections are, prior to final installation, movable between intermediate and final positions, for enabling completion, testing and inspection of the primary pipeline prior to final completion of the secondary containment system. One section of the telescoping piping is a flexible corrugated pipe which is able to bend around elbows. Compression seals and ring clamps are used to connect the components together.

Abstract: A locking manhole insert to be placed under a conventional manhole cover to prevent unauthorized access to the manhole. The insert includes a plate-shaped disc with a plurality of locking radial arms mounted to its undersurface. The locking radial arms are securable in the extended position using a conventional padlock. The insert further includes apparatus for suspending equipment, such as pollution monitoring units, within the manhole opening.

Abstract: A manhole cover support cooperable with a manhole frame for raising the elevation of a manhole cover utilizes a gapped support body positionable between the frame and the manhole cover and size-adjustment mechanisms for altering the size of the outer periphery of the support body. The support body includes one section disposed on one side of its gap and another section disposed on the opposite side of its gap, and the size-adjustment mechanisms include a threaded shank attached to the one section of the support body so as to extend across the gap provided therein. The size-adjustment mechanisms also include a U-shaped bracket attached to the another section of the support body so that the portion of the threaded shank which extends across the gap is accepted by the U of the U-shaped bracket and further includes a nut threaded upon the shank so as to be disposed between the attached end of the shank and the bracket.

Abstract: A modular housing for telecommunication equipment is provided having mating upper and lower modules and a supporting framework for the lower module that it is placed in an excavation in the earth. The lower framework is configured to receive a forklift truck from any side and is provided with upwardly extending vertical frame members connected to each corner thereof. The frame component and the upwardly extending members are all configured to nestingly receive and support the lower module. The upwardly extending frame members are provided with a loop or bolt at their upper ends to provide means to receive a strap, cable, chain, rope or similar lifting means.

Abstract: An access cover assembly (10) has a cover member (12) and a frame member (14). The cover member has twelve vertical wall sections (36) with adjoining vertical edges (38) and twelve canted surfaces (40) with adjoining angled edges (46) depending downwardly from said vertical wall sections (36). The frame member has an upwardly facing frusto-conical section (80) and a number of substantially vertical edges (82) depending downwardly from an inner periphery (81) of said section (80), said inner periphery (81) being shaped such that when said angled edges (46) engage said inner periphery (81) when the cover is partially seated in the frame, the cover rotates towards a fully seated position in the frame member (14), whereupon the cover falls into and is locked within the frame member.

Abstract: A watertight chimney assembly prevents infiltration of water in the region between a manhole cover support frame and a concrete manhole assembly. The watertight chimney, in one embodiment, is comprised of a pair of tubular telescoping sleeves each provided with a flange for mounting respectively to and between the top lip of a manhole assembly and the bottom surface of a flange on the cover support frame supported a desired distance above the top of the manhole assembly to maintain the cover frame at proper grade. An O-ring seated within an annular groove provided in one of the tubular sleeves provides a sliding watertight seal therebetween. The sleeve flanges are arranged and compressed between the cover support frame and manhole assembly and contribute to the watertight seal. One of the sleeves is reversible to increase the telescoping range between a minimum and a maximum extension. In an alternative embodiment, the internal surface of the manhole opening constitutes one of the telescoping members.

Abstract: A removable storm drain cartridge to preserve the ground water quality to improve the environment for separating storm run-off water and removing oil and heavy debris from the storm run-off water, conveniently and inexpensively for use in a conventional storm drain, the cartridge including a heavy duty rectangular box container that is waterproof, an interior passage that is smaller in cross-sectional area that covers the top opening, forcing all storm water to flow through the interior passage first, the interior passage having a shortened length relative to the container length so that water flow will be out of the interior passage up the side walls of the exterior container out through openings in the top of the side walls. An oil trap is strategically located across the opening of the container to catch oil particles and remove them from the water flowing therethrough, while rocks, sand, and other debris will collect in the bottom of the container.

Abstract: Contamination of the sampling portion of an observation well is avoided while providing axial float between the observation well cover and observation well liner by this observation well cover. The observation well cover includes a manhole ring that is set in a raised area of concrete. A manhole cover is fit on the ring and a liner cover fits underneath the ring. The liner cover has a trap to collect contamination. The walls of the screen cover slidingly mate with a wall and, of an 8-inch to 12-inch observation well liner and, respectively. The inner wall of the trap access hole slidingly mates with the outer wall of a 2-inch or a 4-inch observation well liner. This observation well cover provides axial float of the liner relative to the observation well cover while maintaining sealing integrity.

Abstract: An aircraft servicing pit located beneath a surface across which aircraft travel while on the ground is provided with a ladder and a pair of reciprocally retractable handrails on each side of the ladder. Each of the handrails has an inverted "J-shaped" configuration. With the lid open the handrails can be drawn up out of the pit and rotated so that their legs can rest upon the tarmac surface at the edge of the pit. Service personnel utilizing the pit are thereby provided with stabilizing hand grips which enhance their safety when entering and leaving the subsurface chamber within the pit. When the pit is to be closed the retractable handrails are lifted, rotated, and lowered to their fully retracted storage positions.

Abstract: A resilient annular transition collar is provided for roadway structures, including manholes and catch basins, which acts as a flexible transition between the rigid structure or frame of the manhole and the semi-rigid structure of the asphalt paving. The resilient transition collar absorbs any movement of the pavement during expansion and contraction and this absorption avoids the prior art problems of break-up, cracking and separation between manhole and pavement. Risers or adjusting rings may be employed in conjunction with the transition collar to ensure a flush fit between the pavement surface and the upper surface of the transition collar.

Abstract: Procedure for making in-situ underground manholes intended for the passage of electric and telephone ducts which are dimensioned so as to permit the operator's work inside for carrying out repairs, mounting, maintenance, etc. of electric and/or telephone networks. The procedure is based on obtaining a module made of a tough, nonconducting rust-proof light-weight material which is laid in the corresponding hole on the ground and then it is externally filled up with concrete to complete the manhole construction. The inner mould or module is made by joining together two identical square cross-section pieces with a longitudinal profile which will determine the manhole opening in this joining together of both pieces.

Abstract: A distributing box for laying a cable duct is dealt with in the construction field so that, after laying the cable duct, the box is sealed with mortar and then buried in the ground. Accordingly, the distributing box should desirably be set up in the construction field with ease. Underground water must not permeate the distributing box which has been buried in the ground. In the present invention, therefore, a distributing adapter which is mounted in the wall of a concrete box is constructed of a case which has a back plate, a partition wall which divides the interior of the case into a plurality of areas, a flange which is formed at the periphery of the case, and marks for drilling positions, which are put on the rear surface of the back plate.

Abstract: A habitable structure has a ground-supported, water-impervious floor and upright foundation walls which together define an open top water enclosure. Flooring is supported on the foundation walls essentially covering the open top. Roofing is supported above the flooring so as to define a habitable space between the roofing and the flooring above the enclosure. A catchment system collects rainwater from the roofing and other sources and conducts it into the enclosure where it is stored for future use. The enclosure formed by the foundation walls and floor is modified to permit use as either a water storage tank or habitable area itself.

Abstract: An external manhole sealing assembly for sealing the joint to a manhole frame and a manhole casing which includes a resilient sleeve mounted on the manhole frame and the manhole casing to span the joint between the frame and casing, the sleeve is secured to a flexible ring which is mounted on the flange of the manhole frame and a second band encircling the sleeve on the manhole casing, the manhole frame being raised above the manhole casing a predetermined distance prior to sealing the sleeve to the manhole casing so that a bulge is created in the sleeve when the manhole frame is seated on the manhole casing, the bulge allowing for heaving of the manhole frame without destroying the joint seal.

Abstract: A manhole having a splayed rib ring extending from under a lid, an annular supporter having a beveled underside extending around the opening of a ring seat, and an insulation hood attached to an inner side of the splayed rib ring. Both the splayed rib ring and the annular supporter may or may not be concentric with the lid or the ring seat, respectively. Vibration and possible bouncing of the lid is reduced or offset because the splayed rib ring of the lid is retained by the bevelled underside of the annular supporter. A half round groove formed around an outer bottom periphery of the lid accommodates a rubber gasket which prevents the lid from directly contacting the annular supporter, and absorbs and relieves vibration of the lid to reduce the possible noise. The insulation hood completely prevents any worn cables under the manhole from directly contacting the lid and therefore, prevents any possible leakage via the lid that might endanger vehicles and walkers passing by the manhole.

Abstract: The present disclosure sets forth a telephonic equipment facility for field installation of equipment connected to telephone cables. It comprises a partially buried cabinet or container constructed of multi layered materials, defining a bottom having a sloping floor for draining water to a trough, upstanding sidewalls and a top or roof. In addition, above the bottom and protruding from one of the sidewalls, there is an extending cowling sized to define a door opening which is positioned above the support ground. At the opposite end of the structure, there is an appended cabinet portion having internally located frame members for support of cables extending through openings into the housing so that conductor pairs can be serviced. Equipment is placed in the interior supported on bottom mounted runners and upstanding frame members.

Abstract: A temporary reusable storm drainage conduit plug sized to slidably fit into the end opening of a length of tubular conduit situated within the ground. The device in use prevents dirt and debris from entering the open end of conduit already in place during storm drainage construction and is easily manually removable when the construction is ready to proceed further.

Abstract: A manhole grade adjusting ring has an adjustable diameter with a V-shaped expansion lock bridging the ends of the ring. The expansion lock has radial flanges which are adjustably pinned in slots in the ends of the ring after the ring is expanded or contracted to fit a particular manhole frame using an expansion/contraction tool. The "V" is then hammered to expand the diameter of the ring so as to form a tight friction fit between the ring and the manhole frame.

Abstract: A cover (56) of an existing manhole is raised in elevation to the elevation of roadway resurfacing, for example, by an adapter (20) which is secured to a head ring (40) of the existing manhole. The adapter is such that when it is secured to the head ring, apertures (77--77) of ledges (75--75) of the adapter may be aligned with threaded apertures (59--59) in lugs of the head ring to which the cover had been secured. Spaced above the ledges and extending peripherally above the head ring is a lip (72) for supporting the cover. At ninety degrees to each of the ledges and projecting from the lip is an ear portion (84) to which the cover may be secured. Additional adapters may be secured to the first adapter which has been secured to the head ring prior to subsequent resurfacing operations.

Abstract: An underground double containment system consists of a concrete outer containment receptacle housing a primary fluid flow pipe which extends therethrough and is slidably supported on double I-beam structures within the concrete receptacle. The concrete receptacle can be provided with a removable cover providing access to the primary piping in modular sections defined by the boundary of the receptacle. The primary piping can expand or move along the longitudinal axis of the concrete receptacle relative to the concrete receptacle enabling thermal of the primary and containment piping outside of the receptacle, which can be formed from different materials, as the outer containment pipe can be connected to the interior of the receptacle at the juncture of the receptacle and the primary piping. A plurality of concrete receptacles can be joined at an angle of between 0.degree. and 180.degree. to provide a double containment system for nonlinear primary pipes.

Abstract: A manhole rim and cover assembly includes a rim formed with an annular upwardly projecting lip extending around its central opening with a shoulder projecting radially inwardly from the lip at a location spaced below its upper edge. A cover has circumferentially spaced circumferential segments projecting downwardly from its lower surface to fit within the inner side of the lip and to rest upon the shoulder referred to above to prevent crushing of a sealing gasket received between the bottom of the cover and the upper edge of the lip. Vent openings are formed through the lip to vent the manhole when the cover is in place. Spring clips on the cover engage an undercut shoulder on the rim to releasably retain the cover against removal from the rim.

Abstract: An apparatus and method is provided for providing a mold that can be filled with sealing material to establish a barrier seal on top of a manhole to block unwanted inflow of groundwater into the manhole through a space or gap between either the manhole and manhole frame or a pair of adjacent manhole sections. The apparatus includes a pair of circular channel rings that can be mounted on the top face of the manhole. The channel rings are arranged to form an annular sealing material-retaining channel therebetween. The channel rings are strong enough to support a heavy manhole frame (or another manhole section) above the manhole and in contact with the sealing material in the annular channel. The sealing material cures to establish a water-tight pliable seal bonding the manhole frame (or other manhole section) to the manhole.

Abstract: An environmental monitoring well housing and protection method. A housing is disposed over the end of an environmental monitoring well pipe and set in concrete along with the well pipe itself so that the space between the housing and the well pipe is filled with concrete below the end of the well pipe. Fins extend outwardly from the housing into the concrete to anchor the housing. The housing has an interior ledge for receiving and supporting a cover. A flexible gasket is placed on the ledge, the cover is placed on the flexible gasket, and the two are fastened down by a pair of bolts that screw into threaded bores in the ledge. The bolts have five-sided heads and a special tool is provided for installing and removing them. The cover thickness is substantially the same as the distance from the top of the housing down to the ledge, so that where the top of the housing is mounted flush with the ground the top of the cover is also flush with the ground.

Abstract: A swing away manway assembly for a tubular fluid conveying system having a manway opening in a first horizontal plane, the assembly including a cover disposed in a second parallel horizontal plane. The manway cover includes a circumferential sealing means for continuous sealing of the manway opening. The cover is provided with latch means for alternatively engaging and releasing the sealing means. Swing away means is secured to the cover in a plane perpendicular to the first and second horizontal planes of the cover and opening. The swing away means is adapted to facilitate swinging movement of the cover in a horizontal plane upon release of the sealing means. The swing away means includes biasing means for cooperation with the latch means in urging sealing engagement of the cover with the opening, and cam means for limited vertical movement of the cover during horizontal rotation thereof.

Abstract: A fuel containment cover assembly comprising a fiberglass skirt with cast iron inserts molded into an integral unit. The inserts are located on the outer perimeter of the skirt and determine the flow of water from the cover to the ground. A pre-molded gasket extends about the interior perimeter of the cover. The gasket seats on the skirt assembly and seals the fuel containment device from the atmosphere. The cover is bolted to the fiberglass skirt and forms a drainage channel between the cover and the skirt.

Abstract: An underground silo for storing emergency supplies includes a cylindrical body portion having a closed bottom and side walls and an open top with a flange around the top, a convex cover configured for mating with said open top and having a flange for mating with the flange of the body portion, and a hatch in the cover for accessing stored supplies. The body portion are preferably made of seamless woven fiberglass. The cover includes a lip extending downwardly from the flange for encircling the flange of the body portion. A sealant is provided between the flanges of the cover and body portion to facilitate a fluid tight seal. By placing the silo underground the lives of emergency supplies are extending due to thermal insulation of the underground location.