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_ NON-WOVEN FILTER FABRIC
= ALONG TOP OF DRAIN ROCK AND
SAND FILTER. OVERLAP SEAMS A WOVEN GEOTEXTILE FABRIC BETWEEN
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MINIMUM OF 12" TYP. CLEAN 2" DRAIN ROCK SAND FILTER AND DRAIN ROCK 7-12_24
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RIM ELEVATION E M GAP
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MIN. COVER PER PLAN
WIDTH SEE TABLE 1.50'Z4 WIDTH SEE TABLE
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GRADE RINGS AS REQUIRED
(18" MAX.) SET RIM FLUSH
w TREATMENT BED ) —� �� �� �� NON-WOVEN FILTER FABRIC (4 W
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MIN. 1 ��� Q N � 12" INLET PIPE PER PLAN m Ln U 00
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CLEAN 1.5"-2" AND DETAIL 1 THIS SHEET fu
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ELEVATION 18 OUTLET PIPE PER PLAN
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ESTIMATED H GROUNDWATER
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18" PERFORATED PVC 7OR SLOPE 1% TOWARDS SAND
X ADS PIPE (TOP HALF ONLY)
w SAND AND GREASE TRAP (BOISE 24" DIA. TRAFFIC RATED FRAME AND
~ BOTTOM OF ROCK ELEVATION EXCAVATE A MINIMUM OF 12" INTO NATIVE VAULT OR APPROVED EQUAL WITH STANDARD MANHOLE COVER PER o 0
o INSTALL PVC LINER ACROSS BOTTOM AND ALONG SANDY SILT PERC RATE >1 IN HR BAFFLES SIZE PER TABLE ISPWC SD-617. Lu
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OUTSIDE EDGES OF ROCK. LINER SHALL BE CONTINUOUS SECTION VIEW PER TABLE ( / ) )
(SEAMS FACTORY SEALED OR FIELD WELDED). SG-TRAP #4 TO HAVE GRATED LID
ON UPSTREAM END. CD rl
z USE FILTER SAND OR 3/8" MINUS PEA GRAVEL TO
w PROVIDE A SMOOTHLY GRADED SURFACE AT BOTTOM
z OF BED TO PROTECT LINER FROM TEARS AND DAMAGE
o DURING INSTALLATION. 12" INLET PIPE PER PLAN
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w ELECTRONIC MARKERS PLACED ON (if
LENGTH PER TABLE CORNER OF FACILITY, TYP. u N Z o
Of COORDINATE WITH ACHD INSPECTION w Ja
HIGH-FLOW o Z
� BYPASS MANHOLE STAFF FOR PLACEMENT OF MARKERS �
z DURING CONSTRUCTION PRIOR TO
BACKFILLING. OUTLET PIPE PER PLAN 2
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AND DETAIL 1 THIS SHEET z
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PERCOLATION BED (100-YR VOLUME)SD PLAN VIEW
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0 12" PERFORATED PIPE WITH FULL PERFORATIONS
� OBSERVATION WELL o
U INLET PIPE PER PLAN PER ACHD SD-627 z I
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o SAND FILTER SAND AND GREASE TRAP TABLE °`DESIGNED: C. GRAHAM
o STRUCTURE NAME SIZE RIM ELEV. INV. ELEV. IN BAFFLE "B" ELEV. BAFFLE "C" ELEV. INV. ELEV. OUT
SAND AND GREASE TRAP TREATMENT BED (2-YR VOLUME) DRAWN: L. HAASE
w TYP (ACHD BMP #01). SEE ACHD SG TRAP #1-1 1000 GALLON 2558.01' 2551.35' 2551.25' 2550.75' 2550.50'co CHECKED: C. GRAHAM
DETAIL 2 THIS SHEET. 18" PERFORATED PIPE WITH PERFORATIONS TOP HALF ONLY
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O o . ACHD SG TRAP #2-1 1000 GALLON 2554.72' 2550.35' 2550.25' 2549.75' 2549.50' APPROVED: C. GRAHAM
z ACHD SG TRAP #3-1 1000 GALLON 2555.03' 2550.35' 2550.25' 2549.75' 2549.50'
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o PLAN VIEW PREPARED FOR:
50' MIN.
o G20 LLC
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Li SAND AND GREASE TRAP DETAIL (ACHD BMP #01 )
INSTALL PVC LINER ACROSS BOTTOM 2 PO BOX 593
M AND ALONG OUTSIDE EDGES OF ROCK. SCALE: NOT TO SCALE C9.1 EAGLE, ID 83616
Q NOTES LINER SHALL BE CONTINUOUS (SEAMS
FACTORY SEALED OR FIELD WELDED).
OBSERVATION WELL 1. ACCORDING TO THE PROJECT GEOTECHNICAL REPORT PREPARED BY ATLAS TECHNICAL CONSULTANTS LLC (FORMERLY
J PER ACHD SD-627 MATERIALS TESTING & INSPECTION) DATED APRIL 29, 2019, GROUNDWATER IS ANTICIPATED AT A DEPTH OF 5 FEET BELOW
EXISTING GROUND. CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY IF GROUNDWATER IS ENCOUNTERED WITHIN
3-FEET OF THE BOTTOM DESIGN ELEVATION FROM ANY INFILTRATION FACILITY AND/OR IF IT IS HIGHER THAN ANTICIPATED.
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3: 2. REFER TO ACHD BMP 21 FOR ADDITIONAL INFORMATION REGARDING SEEPAGE BED CONSTRUCTION.
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3. ACHD STAFF MUST VERIFY FACILITY INFILTRATION RATE AFTER FACILITY IS FULLY EXCAVATED. �
Q 100-YEAR WATER SURFACE ELEVATION
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U w TEMP SWALE #6A=2553.00' ■
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HORIZONTAL SAND FILTER TABLE 100-YEAR VOLUME=1,095 CF Q J
TEMP SWALE #6B=2553.00' Z (n
TREATMENT BED PERCOLATION BED FINISHED GRADE TOP OF ROCK BOTTOM OF ROCK PERF. PIPE PERF. PIPE DESIGN INFILTRATION 100-YEAR VOLUME=1,274 CF
BASIN NO. SAND FILTER DIMENSIONS STORAGE VOLUME HIGH GW ELEV \ \ \ \ z Q
Li DIMENSIONS DIMENSIONS ELEV. ELEV. ELEV. INVERT DIAMETER RATE
o ACHD VERTICAL 2550.50' (18") 18" ���\�\\�\\ — \\�\\���� O J W
� SAND FILTER #1 7.5 Wx112 Lx4 D 1.5 Wx112 Lx4 D 28 Wx112 Lx4 D 2557.75 2554.00 2550.00 2552.10' (12") 12" 4,962 CF (100-YR) 1 INCH/HR 2548.50 \//
= ACHD VERTICAL 2549.50' (18") 18" \\��\�\\�\ OQ� \\��\\�/
SAND FILTER #2 4 Wx130 Lx4 D 1.5 Wx130 Lx4 D 15 Wx130 Lx4 D 2554.50 2553.00 2549.00 2551.00' (12") 12" 3,065 CF (100-YR) 1 INCH/HR 2548.50 /\\ \//\\ ,� S/ (IfQ S\O�S//\\ \\j�\\ > w z
z SAND FILTER #3 5.5ACHD VERTICAL 'Wx152'Lx4'D 1.5'Wx152'Wx4'D 20'Wx152'Lx4'D 2554.50' 2553.00' 2549.00' 2559.00' (12") 12�� 4,853 CF (100-YR) 1 INCH/HR 2548.50' \\\\jj\j\\/F S�OA CL w / Q
LLJ \\ \\\ F o N BOTTOM ELEV \\ \\� m Lu
///�/� TEMP SWALE #6A=2551.00' /��/���/
VERTICAL SAND FILTER DETAIL (ACHD BMP #21 ) 1 \,�\j/\/� TEMP SWALE #6B=2551.00' \\/� 0
z SCALE: NOT TO SCALE \\/\\j\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\j\\ - p�
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TEMPORARY SWALE SUMMARY
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0 SWALE NO. AVERAGE DEPTH (FT) SWALE TOP SWALE BOTTOM
DIMENSIONS (WxL) DIMENSIONS (WxL)
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#6A 2.00 20x56 440
J #6B 2.00 20x61 445
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TEMPORARY SWALE CROSS SECTION 3 CSW PROJECT NO. 19005
SCALE: NOT TO SCALE
DRAWING DATE 07/12/2024
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