The invention disclosed herein includes apparatus and a method for enhancing the evaporation rate of leachate from leachate evaporator ponds. The HIAP apparatus and method promotes enhances evaporation by providing heat from high powered industrial heat lamps that direct heated air and heat energy across the air/leachate liquid interface of the evaporator pond surface to increase the evaporation rate of leachate from the evaporator pond.

Disclosed are novel solutions in which a preexisting sediment capping system is integrated with improvements such as a cap ingredient processing and delivery apparatus, cap processing method and novel compositional cap product, whereby a hazardous site is remediated by delivering at least one novel cap composition layer over the contaminated subaqueous waterway or terrestrial substrate floor. One embodiment includes a powdered activated carbon (PAC) based cap layer produced by the system and methodology disclosed, the cap layer ingredients comprising predetermined ratio amounts of dry PAC and dry powdered 2-Hydroxypropyl guar gum (HGG) used as a safe and effective delivery ingredient, blended in a cap processing and delivering apparatus with a dewatered sand semi-slurry, the processed resulting capping composition being delivered in a manner such that a novel PAC cap layer is provided to a cap placement area in need of remediation.