HomeMy WebLinkAboutMiscellaneous - Exception (450)Pressure dosed 11. if flow >= 2,000 gpd - 254(1)(a) & 254(2)(a)
Cycles per day is consistent with chamber volume - 23 1
Volume calculations include flowback volume - 2') 1(2)
24 hour storage capacity above pump on elevation - 231(2)
Number of pumps: 2 if system serves >2 dwelling units - 231(6)
Capacity of pump(s) - gpm @ ' TDH - 226(4)(r)
Pump can pass 1 1/4 "solids (minimum) - 231(7)
Pump controls specified - 220(4)(r)
Alarm equipment specified - 231(2)
Alarm is in building and powered on separate circuit from pump - 2') 1(9)
Pump sequence correct (off -lead on -lag on-alan-n on) - 231(8)
Pump performance curves included - 220(4)(r) -
Manual operating switch - NA 12.01
Check valve, bleeder hole - NA 12.01
1 childproof, 24" riser/manhole to final grade - 2'31(5),
Soil compaction beneath pump chamber specified (if soil is non-native) - 221(2)
6"of <=3/4"stone beneath chmbr. specified - 221(2) & 228(1),
Buoyancy calculations if chamber is at or below water table - 221(8)@
9" of cover over chamber (minimum) - 228(1)
H- 10 loading (min.) - H-20 if traffic - 226('));
Chamber is watertight - 221 (1) `
Top of chamber <=36" below grade - 221(7)
Leaching Facility (general - complete for all designs)
OK Problem N/A
50% larger if garbage disposal - 240(4)
Trenches to be used whenever possible - 240(6)
No vehicle or imperv. area above 11. unless unavoidable - 240(7); NA 13.02
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Vented if under impervious cover - 241 (1)
Vented through same pipes as distribution system - 241 (1)(a)
Vent protected from precipitation/animal entry - 241 (1)(b)
Vent is -placed beyond traffic or impervious area - 24 1 (1)(c)
All lines connected to vent if bed or trenches - 241(1)(d)
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9" cover over peastone - 240(9)
Reserve area provided (new construction) - 248(1)
Reserve 4' from primary leach area – NA 9.04
4' (5' if perc rate <=2 MPI) separation to g.w. - 212(a) & (b)
4' (down to T with variance or I/A - upgrades only) of natural soil under U.
GW separation is adjusted to highest existing grade if facility cuts into a hillside
Pipe slope minimum of 0.005 - 251(9)
Require 5' removal and replacement if in fill - 255(5)
Top of leach facility <= 36" below grade - 221(7)
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Final grade over 11. minimum 0.02 ft/ft -240(10)
Surface & subsurface drainage away from l.f. - 240(l 1) & 245(5)
Minimum design flow 440 gpd without deed restriction – NA 13.01
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3:1 slope where grading required - 255(2)
Toe of fill slope stops E from property line or swale installed - 255(2)
Impermeable barrier if < 3:1 slope or < 15 feet to–3:lslope - 255(2)
Impermeable barrier/retaining wall poured concrete – NA 9.02
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Retaining wall stamped by P.E. - 255(2)(b)
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Top of retaining wall >= top of peastone elevation - 255(2)(f)
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10' offset from edge of leach facility to edge of ret. wall - 255(2)(g)
Perc test(s) done in most restrictive layer - 104(2)
Perc test 4' below leaching elevation – NA 7.06
Design flow listed and required/provided leach area given - 220(4)(f)
Leach pipes SCH40 PVC – NA 10.01
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Leach pipes minimum 4" diameter except for dosed system – NA 14.04
Leach lines capped, vented, or connected together - 251(9)
Pressure dosing guidance followed if pressure distribution - 254(2)(c ),
Pressure dosing required over 2,000,gpd or with I/A remedial use - 231(1)
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Leaching Trenches (Check here if not present: )
OK Problem N/A
Number of trenche : -
Minimum of 2 tr fiches - NA 9:01(2)
Depth of trenc s (max eff. 2'):
Width of tre ches (2' min., 4' max.): .
Length of enches (100' max.):
-247(l)
- 251 (1)(b)
- 25 1 (1)(a)
Trench are vented (when > 50' - 251 (11)
Tren es follow contour lines 251(2)
Tr ch spacing 3 times eff five width or depth mi.
fill or reserv;ea
etwee enches, 10' min. - NA 1
Available leachea g en (Min. 500 s.f.) - NA 9.0
Bottom = x x#_
Sidewall x D x #
Effective leach given
251 (1)(d)
14.03
s.f.
x2= s.f.
t-� Effec a area = total area f. x LTAR =
Effective ea is >= design flow of faeflity being served
2"of 1/8 - 1/2" 2x washed peastot}e - 247(2)
Trench depth of 3/4" to 1 1/2" double washed stone - 247(1)
Leach Fields (Check here if not present:
OK Problem N/A
g/day
Final Grading
OK Problem N/A
- Slope over leach area minimum of 0.02 feet/foot - 240(10)
Grading shall divert drainage away from leach area - 240(l 1)
=l Grading slopes away from dwelling
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Number of fields: (need dosing chamber if > 1, 231 (1))
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Length (100' max.): - 252 (2)(b)
Width:
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Total area: L x W = s. f.
Minimum 900 square feet - NA 9.01(1)
Distribution lines connected with solid pipe - NA 15.01
Effective leach area given
Loading factor:
Effective area = total area s.f x LTAR = g/dav
Effective area is >= design flow of facility being served
Minimum of two distribution lines - 252(2)(a) "
6' line separation (max.) - 252(2)(d)
4' maximum separation from edge of field to line - 252(2)(e)
10' minimum separation between adjacent leach fields - 252(2)( f)
Between 6" and 12" of 3/4 - 1 1/2" stone beneath field - 252(2)(g) & 247(2)
2"of 1/8"-1/2" 2x washed peastone.- 247(2)
Final Grading
OK Problem N/A
- Slope over leach area minimum of 0.02 feet/foot - 240(10)
Grading shall divert drainage away from leach area - 240(l 1)
=l Grading slopes away from dwelling
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