Permit - 1283449 - Laserfiche WebLink

Home Browse Search

AQUA TEST, OREGON MEMORANDUM From: Re: Joe Petrovich, R.S., DEQ-WVR Dan Bush, Aqua Test, OR Korner Post Eatery August 25, 1993 Enclosed is some information on the InfiltratorTM gravelless chamber system, including a set of installation instructions. On a copy of the plot plan is highlighted the new seepage trench sections where the chamber apparatus is proposed to be incorporated. On a sketch of the proposed seepage trench are entered notes and comments regarding the construction, po.~ition and relationship of the conventional and alternate technology, Essentially, conventional 36 inch wide seepage trenches are constructed to the same criteria as the existing and level to the established elevations of the trenches and distribution piping (gravity), On top of the finished grade of the drainrock, in the absence of filter fabric or other protective material, is placed the lengths (6 ft. 3 in. ea.) of the chamber system. Because of a difference of 3 inches between the outside width of the chamber (33 in.) and that of the trench (36 in.) it is necessary to install some protective material such a straw or filter fabric over the exposed gravel between the exterior of the chamber and the excavated trench sidewall (it is not necessary or even recommended to cover the entire width of the chamber area with fabric). The termination of the chambers should be finished with end plates from the manufacture. In addition it is suggested to install one or more monitoring ports through the plastic chamber material (provisions exist), The point of connection to the existing trenches should be marked for future reference. Following inspection~ the trenches can be backfilled with native material free of rock. I hope this meets your needs in this matter. If not or if I can be of some assistance, please let me know. Dan Bush, R,S, Aqua Test, OR