HomeMy WebLinkAbout238.10outlet pipe
A
filter fabric
top only
riser for infiltration only
for detention/infiltration
see Standard Detail 235.00
optional parallel tank
(\�\� access risers \
(max spacing 100-8) 1
outlet/overflow
structure
access risers
PLAN VIEW
NTS
50'50' max 100' max 50' maxmax 50' max
T
1 I./—.O 0 oead0 st(oraoe 0 0 0 0 0 0
2' in.
detention tank 1" holes as
size as required required
overflow structure
min. 54" dia.
type 2 C.B.
36" min. dia. (typ.)
SECTION A -A
NTS
A
washed rock bedding
and backfill to top of tank,
min. 2' beyond edges
settling vault or
type 2 C.B.
if required
inlet pipe
(flow through)
2" min. diameter air vent
pipe welded to tank
(required if no access
riser on tank)
type 2 C.B. or settling
vault if required
—411—
4' min.
washed rock bedding
and backfill to top of tank
NOTES:
1. All metal parts corrosion resistant.
2. Steel parts galvanized and asphalt coate(treatment 1 or better).
3. Filter fabric to be placed over washed rock backfill.
4. The proposed bottom shall be at least 3 feet above the seasonal high water level and have at least 3 feet of permeable soil beneath the bottom.
I y STD. PLAN - 238.10
+ + PUBLIC WORKS TYPICAL INFILTRATION TANK
DEPARTMENT
MARCH 2008