Leaching chamber having a sidewall with louvers

A plastic leaching chamber, the chamber comprising:

• a chamber substrate constructed from a Polyethylene terephthalate (PET) material and having opposing side base flanges which lie in a horizontal plane and extend lengthwise along the chamber substrate,
• wherein the chamber substrate includes opposing sidewalls extending upwardly from each of the opposing side base flanges to a top of the chamber substrate, wherein the chamber substrate includes a lengthwise center plane which is perpendicular to the horizontal plane, and
• wherein the opposing sidewalls define one or more leach openings having one or more tab slot openings located proximate to the opposing sidewalls, and
• one or more louver articles constructed from a non-Polyethylene terephthalate (PET) material, wherein each of the one or more louver articles includes at least one tab which is configured to engage with the one or more tab slot openings to securely associate the one or more louver articles with the chamber substrate to cover the one or more leach openings,
• wherein the one or more louver articles comprise wall spines configured to divide a plurality of slot rows of the one or more louver articles into columns, and
• wherein the one or more louver articles comprise a louver article base comprising a base wall, a first support and a second support configured to form a cavity between the base wall and the chamber substrate.