Abstract: Apparatus useful for providing a liquid-tight seal around cellar formed around a hydrocarbon exploration or production well includes a reusable load-supporting surface having at least two mats surrounding and spaced-away from the borehole opening. At least one spanner is configured to extend between the cellar wall and mats. At least one elongated spanner support is used to mechanically couple one or more spanners to the cellar wall. At least one elongated lip support is used to mechanically couple one or more spanners to the mats.

Abstract: Apparatus useful for providing a liquid-tight seal around a cellar formed around a hydrocarbon exploration or production well includes a clamp and at least one platform. The clamp is configured to engage a wall extending around the cellar and the platform is configured to extend outwardly from the clamp over the earth's surface adjacent to the cellar.

Abstract: Apparatus useful for providing a liquid-tight seal around an opening formed in the earth's surface includes a reusable load-supporting surface having at least two sealingly interconnected mats surrounding and spaced-away from the borehole opening. At least one flexible, planar spanner is configured to extend between the borehole wall and mats. At least one elongated spanner support is used to mechanically couple one or more spanners to the borehole wall. At least one elongated lip support is used to mechanically couple one or more spanners to the mats.

Abstract: Method of manufacturing mats for use with a plurality of top side seal members in a load-supporting surface includes at least one milling machine, router or thermoplastic mold forming at least one channel in the upper surface of each mat proximate to the outer edge of at least a first side thereof and configured to engage at least one dart of at least one of the seal members and a recess in each mat's upper surface around each respective channel and configured to seat at least part of one leg of at least one of the seal members.

Abstract: Methods of manufacturing a plurality of mats useful with a plurality of frame style seal members in a load-supporting surface include at least one milling machine, router or pre-formed mold forming at least first and second elongated grooves in first and second offset outer edges of at least a first side of each among at least first and second stepped-configuration, reversible mats. Each groove causes the seal member(s) seated therein to extend into a gap formed between the mats, abut at least one seal member extending from another mat into the same gap and form a liquid-tight seal therewith.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between adjacent components of a load-supporting surface useful at an outdoor worksite includes a liquid-impermeable, elongated, seal member configured to be sealing coupled to first and second mats in the load-supporting surface and extend across the gap formed therebetween.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between at least first and second adjacent mats in a load-supporting surface includes at least one seal member configured to be coupled to each among first and second outer edges of at least a first side of each among at least first and second adjacent mats and extend laterally outwardly therefrom into one among at least two gaps formed between the adjacent mats and abut at least one other such seal member extending into the same gap from the other adjacent mat that forms the gap.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between at least first and second adjacent mats in a load-supporting surface includes at least one seal member configured to be coupled to each among first and second outer edges of at least a first side of each among at least first and second adjacent mats and extend laterally outwardly therefrom into one among at least two gaps formed between the adjacent mats and abut at least one other such seal member extending into the same gap from the other adjacent mat that forms the gap.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between at least first and second adjacent mats in a load-supporting surface includes at least one seal member configured to be coupled to each among first and second outer edges of at least a first side of each among at least first and second adjacent mats and extend laterally outwardly therefrom into one among at least two gaps formed between the adjacent mats and abut at least one other such seal member extending into the same gap from the other adjacent mat that forms the gap.

Abstract: Apparatus for forming a liquid-tight seal across a gap formed between adjacent, interconnected first and second mats in a load-supporting surface includes first and second liquid impermeable, elongated seal members extending into the gap from the first and second mats, respectively. The seal members abut one another in the gap to form a liquid tight seal therebetween.

Abstract: Apparatus useful for providing a liquid-tight seal around an opening formed in the earth's surface includes a reusable load-supporting surface having at least two sealingly interconnected mats surrounding and spaced-away from the borehole opening. At least one flexible, planar spanner is configured to extend between the borehole wall and mats. At least one elongated spanner support is used to mechanically couple one or more spanners to the borehole wall. At least one elongated lip support is used to mechanically couple one or more spanners to the mats.

Abstract: Apparatus for forming a liquid-tight seal across a gap formed between adjacent, interconnected first and second mats in a load-supporting surface includes first and second liquid impermeable, elongated seal members extending into the gap from the first and second mats, respectively. The seal members abut one another in the gap to form a liquid tight seal therebetween.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between adjacent components of a load-supporting surface useful at an outdoor worksite includes a liquid-impermeable, elongated, seal member configured to be sealing coupled to first and second mats in the load-supporting surface and extend across the gap formed therebetween.

Abstract: Apparatus useful for providing a liquid-tight seal around an opening formed in the earth's surface of an underground borehole includes a clamp and at least one platform. The clamp is configured to engage a wall extending around the borehole and the platform is configured to extend outwardly from the clamp over the earth's surface adjacent to the borehole.