An insulating disc can be easily installed and removed from inside a riser of a septic tank. The insulating disc is seated atop an opening of the tank lid and seals around the riser inner surface. The disc can include a core formed of R-10 extruded polystyrene sandwiched between two layers of high-density polyethylene. A flexible gasket can extend outward from the disc to seal against the inner surface of the riser. Retention tabs can also be provided to center and hold the disc in place. The disc can be divided into two semicircular halves that are hinged together. A hook, eyebolt and/or rope can be used to aid in removing the disc from the riser.

An apparatus and method for providing a water impenetrable barrier between an underground duct and an access opening. The apparatus may cover a secondary opening in a corrugated containment sump of an underground storage tank or the manway of a sanitary sewer, catch basin or other manhole system. The apparatus includes a cover, inflatable seal and a tank of compressed nitrogen to inflate the seal. When sealed to the access opening, the cover restricts the inflow of water or other debris into the interior of the underground duct and nitrogen may be released into the sealed access.

A fastener for attaching an identification placard having a post to a lid for a utility vault from a single side of the lid, the fastener includes a body portion for positioning within a hole in the lid, the fastener having tabs for retaining the fastener to the lid and lobes for preventing over insertion of the fastener into the hole in the lid and a bore extending through or partially through the body portion for receipt of and friction retention and/or mechanical interlocking of the post of the identification placard.

An apparatus and method is described for providing a water impenetrable barrier between an underground duct and an access opening. The apparatus is particularly well suited to cover a secondary opening in a corrugated containment sump of an underground storage tank or the manway of a sanitary sewer, catch basin or other manhole system. The apparatus includes a cover, inflatable seal and a tank of compressed nitrogen to inflate the seal. When sealed to the access opening, the cover restricts the inflow of water or other debris into the interior of the underground duct and nitrogen may be released into the sealed access to reduce corrosion of components contained within the access.

A tank collar has an adjustable mounting surface for a containment sump, such that the containment sump may be adjusted on the tank collar to be substantially plumb, even if the tank collar itself is not plumb. In particular, the containment sump wall is angularly adjustable with respect to the tank collar, which is fixed to an underground storage tank (UST). This angular adjustability facilitates a method of installation in which imperfect angular orientation of the tank collar and UST may be compensated for by angular adjustment of the containment sump wall. During and after such angular adjustment, a consistent seal between the containment sump wall and the tank collar is maintained, such as in the form of a continuous line of contact around the circumference of the interface between the tank collar and the containment sump wall.

A tank suited for use as a septic tank or for otherwise holding or treating water has a top hatchway large enough to enable an adult person to enter the tank. The hatchway is closed by a lid which has a port with a removable cover, where the port that is large enough to enable through-passage of a suction line for cleaning the tank, but small enough to prevent a child from entering the tank. Preferably the port area is less than 6 percent of the effective area of the lid and the centerline of the port lies at a location which is between 20 to 80 percent of the radius of the lid.

A fastener for attaching an identification placard having a post to a lid for a utility vault from a single side of the lid, the fastener includes a body portion for positioning within a hole in the lid, the fastener having tabs for retaining the fastener to the lid and lobes for preventing over insertion of the fastener into the hole in the lid and a bore extending through or partially through the body portion for receipt of and friction retention and/or mechanical interlocking of the post of the identification placard.

An apparatus and method for a grease trap for separating grease and solid waste from waste water. The grease trap includes a tank having a downwardly shaped bottom. An upwardly shaped baffle insert divides the tank into an upper chamber and a lower chamber. An outlet port near an upper part of the baffle allows waste into the upper chamber. An inlet invert in the tank receives incoming waste water, while an outlet invert removes water from the tank. A removable cover covers the tank and allows access for removal of accumulated grease and solid wastes.

Risers for use in a riser assembly to provide access to below-grade chambers or vaults are provided. Risers may include an angled wall connecting a first end and a second end spaced apart along a central lengthwise axis. In an embodiment, the riser may include a plurality of latches spaced around the first end and the second end with radially extending lips and canted terminal end surfaces. A plurality of receivers may be spaced between the first plurality of latches on the first end and the second end. Alternatively, plurality of latches may include a first and second latch body extending to a terminal end that comprises a first circumferentially extending lip and a first canted terminal end surface. Risers may be configured to connect to other risers to form a riser assembly.

A lid for a utilities vault having a moldable core and a reinforcement matrix positioned within the core, the reinforcement matrix including longitudinally and laterally extending intersecting members and a plurality of lid feature housings positioned on and attached to the intersecting members, the lid feature housings extending through the core and protruding to the upper and lower surfaces of the lid, and the plurality of longitudinally and laterally extending intersecting members have a height sufficient to provide reinforcement without a perimeter member for the reinforcement matrix.