meeting minutes

Meeeting Minutes: DEC 1, 2009

Participants: Dave EPRO, Martin, Aaron, Charlie, Lisa

Summary of Discussion:

Drainage Board: Charlie discussed using a capillary system for irrigation on the flat areas with an 8" depth. On steeper and deeper areas and overhead. The sheet drainage board and the capillary system are incompatible, as you want the water to go up to the plants.

Root Barrier: Charlie would prefer 30 mil low linear hot air welded as will perform better with aggressive plants like grasses.Right now Dave has bid 15 mil poly ethylene which has been used with methane gas barriers.

Dave will communicate to see how much this will change the bid. The cost is 23 cents more than the 15 mil.

The approach of the coating the walls and protecting them was discussed.

Anchors Systems:

The anchors will interrupt the root barrier. Some can be attached to the exposed beam on west wall and the others will need to go into the parapet walls. Charlie discussed building retention from the bottom with rigid panels which would not work on the steep side as the sign curve will not work. The best choice will be to anchor to the slab and the parapet walls. The anchors should be at the farthest 18" apart.

Charlie will send a drawing of how this works.

Drainage:

there will be rectangular scuppers in slope cross cutting walls. Charlie needs a clear picture of where the drains are located exactly so he can locate and make suggestions and direct the other ones. The paths will be done on top of a drainage board. The paths will be 3 inches of gravel with a 2" top dressing of DG. This will sit on top of the drainage board. The water has to be on the lowest most level to go through the sheet drain The sheet drain is pegged and then filter fabric is added above. There is no requirement for insulation. Charlie is unclear how the water will move on the southern most edge a trench drain is located there and will need to be sized accordingly. Conduit will need to be added to go through to the channel drain.

action items:

1.Aaron will provide drawing with exact drain locations

2.charlie will proved drawing of scupper and other proposed drainage

3.charlie will provide a cross section of roof layers and how the capillary drainage will work

4. lisa and aaron and charlie will work on soil depths and grass height models

5. dave will provide updated pricing for martin with 20 year warranty, and 30 mil liner.