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EXHIBIT A
DRAINAGE PLAN
DRYWELL #2 - 10'x6'
DRYWELL #1 - 24'x8'24'8'10'6'
ROOF TO BE INFILTRATED
DRYWELL #2
DRYWELL #1
4" PIPE PERVIOUS PAVEMENT
PERVIOUS PAVEMENT
TYPICAL FULL INFILTRATION APPLICATIONS
6"
24"
12"
24"
WASHED ROCK 1 12"- 34"
LEVEL
INFILTRATION TRENCH
SECTION A
NTS
PLAN VIEW
NTS
SECTION VIEW
NTS
VARIES
A
A
6"
6"
4" RIGID OR 6"FLEXIBLE
PERFORATED
PIPE
CB SUMP w/SOLID LID ROOF DRAIN
4" RIGID OR 6" FLEXIBLE
PERFORATED PIPE
OVERFLOW
SPLASH BLOCK
ROOF DRAIN
CB SUMP w/SOLID LID
12"
FINE MESH
SCREEN
SETBACK
FROM
BUILDING
5' MIN.
1' MIN.1' MIN.
FILTER FABRIC
COMPACTED BACKFILL
4" RIGID OR 6" FLEXIBLEPERFORATED PIPE
112" - 34" WASHED ROCK
MIN. 1' ABOVE SEASONAL
HIGH GROUNDWATER
TABLE, SEE SECTION C.2.2.2
TRENCH SETBACK FROM
BUILDING AS REQUIRED,15' MIN.
DRIVEWAY
X-SECTION
NTS
2' MIN.
FILTER STRIP
SEE SECTIONS
6.3.4 & 6.3.5
18" MIN.
6" MIN.
3/4" TO 1-1/2"WASHED DRAIN
ROCK
GRASS
OVERFLOW
NOTE:SEE C.2.2.3 FOR
TRENCH LENGTHS,
TRENCH SPACING ANDSITE LIMITATIONS
MIN. 1' ABOVE
SEASONAL HIGHGROUNDWATER
TABLE, SEE
SECTION C.2.2.2
X-SECTION
NTS
GRASS
2' MIN.
18" MIN.
6" MIN.
3/4" TO 1-1/2"
WASHED DRAIN
ROCK
OVERFLOW
15' MIN. ASREQUIRED,SEE C.2.2.3
FROM ROOF
NOTE:SEE C.2.2.3 FORTRENCH LENGTHS,TRENCH SPACING ANDSITE LIMITATIONSMIN. 1' ABOVESEASONAL HIGHGROUNDWATERTABLE, SEESECTION C.2.2.2
HOUSE
FLOW
48 INCH DIAMETERHOLE FILLED WITH
1 12" - 3" WASHEDDRAIN ROCK
SECTIONNTS
MARK CENTER OF HOLEWITH 1" CAPPED PVCOR OTHER MEANS
FLUSH WITH SURFACE
ROOF DOWNSPOUT
OVERFLOW
SPLASH BLOCK TOPSOIL
FINE MESH SCREEN
MIN. 4" DIA.PVC PIPE
SIDES OF HOLELINED WITHFILTER FABRIC
CATCH BASIN(YARD DRAIN)
15' MIN. AS REQUIRED, SEE SECTION C.2.2.3
VARIES
1' MIN.
MIN. 1' ABOVE SEASONALHIGH GROUNDWATER TABLE,SEE SECTION C.2.2.2
5' MIN. SETBACK
FROM BUILDING
FLOW
PLAN VIEWNTS
HOUSE
ROOFDOWNSPOUT
ROOFDOWNSPOUT
CATCH BASIN(YARD DRAIN)
48 INCH DIAMETERHOLE FILLED WITH1 12" - 3" WASHEDDRAIN ROCK