HomeMy WebLinkAboutSWG Design - 2/4/1994 .. a,w,• •v..n, — recap V1V8 .1.. 99/17/91
A dee_.gn will be reviewed when 3 copies of each of the following items are submitted:
• Completed design form that has been signed and dated
• Completed Resource Lands and Critical Areas Checklist attached
• Scaled plot plan, including all applicable items on checklist
• Scaled layout sketch, including all applicable items on checklist
• Cross-section sketch, including all applicable items on checklist
PARCEL IDENTIFICATION
BPS SEPTIC DESIGNS
Permit Number /) Designer's Name 445 LOST HWY.W.
URLMLHIUN,WA
Applicant's Name Ku2Ta KeU k Lhe- Prop. Owner's Name SA(-E
Mailing Address k0.—[fix 7047 Prop. Street Address
Assessor's Parcel--No. I UO7750;S O r,z Subdivision
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ARS
DESIGN PABANHTSAS AkrK
I__I L7 LJ Data -
u Designed Vertical
Separation
Mound Subsurface Pressure Gravity Bed Trench /Z in
Septic Tank/Drainfield Specifications ��
qo. Bedrooms j Pressure Distribution? e—
ye. El No
Daily Flow 'nO�apd :::::::::::::::::::n::: (If Yee. Proceed. .. )
........................
Septic Tank Capacity /ZCYJ gal ....... . ... ...
aeceiving Soil Type (1-6) TYPE ¢
aeceiving Soil Appl. Rate .(0 9Pd/ft' Laterals
french/Bed Bottom Area /d,XJ ft. Schedule/Class 000
french/Bed Width .j ft Length 32.83 ft
Diameter ) in
Elevation measurements Number �—
)rig. Drainfield Area Slope Separation // ft
Final Drainfield Area Slope ¢ e Orifices
)epth of Bottom of Trench/Bed Total Number of Orifices /Z
.rm Original Grade // ,<- in Diameter im in
n.1ow Spacing 2.4$
v 9 in manifold
ne,.....r.w Schedule/Class /�
�y Length 72- ft
lump Required? u Yea No Diameter ¢ in
.................. (If yes, Proceed. ..) Transport Pipe
..........................
schedule/Class
Schedule/Class 2LYJ
Pump/Siphon Specifications Length /45 ft
Difference in Elevation Between Pump Shutoff Diameter 7 in
.nd Uppermost Orifice — /3 ft Dosing and Pump Chamber
I Doses/Day z
ppermost Orifice is higher, 9lowsr Doze Quantity /PO gal
hen Pump Shutoff Chamber Capacity /400 gal
apacity @ Tot. Pres. Head 4z.Z0 9Pm
alculated Tot. Pres. Head — /n.4�/ ft
(Attach Pump Curve)
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Part Bs Detaralrstinatioa of Director ?t iil.',3E.3i§P'i'ilEE:::EE ..........................
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11 Reinspection is justified and will be scheduled within 7 working days.
El Reinspection is justified, and a sample of soil at the applicant's re-
quest will be sent to a certified soil testing laboratory for analysis.
(The department will accept responsibility for payment of associated
laboratory costa only in the event the staff findings on soil type (as
delineated in WAC 246-272-094) were determined to be incorrect. )
Reinspection is not justified, and findings and actions of staff were
determined to be consistent with departmental policy and procedures.
ElReinspection is not justified, for the following reason(s):
Other comments:
Director of Health Services Date
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Environmental Health Specialist Date
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Directo,�of Health Services Date
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APPROVED
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�oun.y Dept. Health Services
,okl)2ROVED
Initials
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;cy Lept. Health Services
m --.I Initials
Date
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Mason County Dept. Hca!th Services - � s ivj� '
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APPROVE-D ! 's� Ll `= It
' Initials '
Date
CURTAIN DRAIN DETAIL
Overfill
Black plastic liner
SBndy.' ,Soi•1 .• .
— — — — — — Silt• Barrior
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.G , " e , ° p ` •Compaction
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• �18" Minimum . —•i v , ,
Mason County Dept. HcaitS Services
APPRO�
NOT TO SCALE Initials
Date
CONSTRUCTION NOTES11
1 . Check the moisture content of the soil at 7"-a" deep. If it
is too wet, smearing and compacting will result, thus reduc-
ing the infiltration capacity of the soil. soil moisture can
be determined by rolling a soil sample between the hands. If
it rolls into a ribbon, the site Ss too wet to prepare. If
It crumbles, site preparation can proceed. If the site is too
wet to prepare, do not proceed until it dries out.
2. Use extreme care in site preparation. Remove no top soils.
Use care in tree removal and stump removal.
3. Do not deviate from this design with-out the permission of
the designer.
1. Drain£ield sites are to be roped off prior to and during con-
struction of home to protect the soils and/or system from any
kind of traffic. Soils can be damaged easily.
i. A certified professional installer is required to install
this system. This person must be certified by the County
Health Dept. to install septic system. All others. do not
qualify.
The curtain drain ( if required by designer) is to be install-
ed a minimum of B" into compaction and tight-lined, meeting
all county codes. See attached sheet for design of a curtain
drain if required.
. Maintain a minimum of 100' from any standing water unless
other wise ok"ed by the designer and County Health Dept. .
If you cannot maintain the 100' then stop work and notify
the. designer at once.
• Maintain a minimum of 10' from any and all water lines that
are under pressure.
. wheels and tracks of equipment are not to come 1n contact
with infiltrative surfaces.
0. The bottom and sidewalls of the excavation should be left
with a rough open surface.
1 . Filter screens are to be used on the outlet side of the septic
tank. These screens are to be used to screen the fine solids
from the effluents prior to final disposal. These screens must
be made accessible for cleaning purposes. (Recommended for all
type -of systems but required for all alternate type systems)
2. Test hole N4 is with-in the proposed prim iry drain field area and
some question exists as to the possibility of fill existing. In my
opinion, if fill does exist that this fill material is well stabilized
and does not indicate that this system will short circuit. I see no
problems with installing this system where designed.
hiason County Dept. Health Services
AP PROVED
Initials
Date
------------------
1 . This pressurized system will be used in a trench system.
(SEE TRENCH DESIGN)
2. Syste� configuration:
A• �iEe manifold
B. Check valve installed in transport line near pump chamber.
C. (_ laterials are to be used. 3 on each aide of the
manifold.
D. Laterals and a portion of the manifold are to drain
between doses to minimize freezing problems. Also, it
reduces settling of solids.
E. Orifices are to be at a 6 o'clock position. The final
orifice at the distal end of the laterial can be placed
at the 12 o'clock position for draining purposes, testing,
and air venting.
F. Transport line is to remain full by use of a check valve.
G. Clean-outs at the end of each laterial shall be provided.
Threaded end caps are to be provided.
H. Laterials are to be level.
. 3. In order to eliminate the potential for erosion into the
gravel of backfill material over lying the bed, a synthetic
filter fabric (not untreated building paper, straw, or such)
shall be used. (TYPAR #3201 OR EQUIVALENT)
4. Precautions must be taken so pumping chambers do not float out
of position due to hydrostatic pressures on the nearly empty
tank.
5. . All electrical controls shall be mounted outside the tank and
meet applicable code. Also, an easily separated union shall be
used. for easy pump removal when it becomes necessary.
6. Where the low water level in the dosing chamber is above the
laterial inverts, pumps must have a siphon breaker. A small
"weep" hole drilled in the discharge line at the highest point
in the dosing chamber can act as a simple siphon breaker.
7. The Washington State committee finds evidence that effluent
screens are beneficial and effective in preventing the pumping
of solids into the small diameter distribution system. Screens
shall meet the following minimum criteria:
A. 1 /8" mesh size.
B. Non corrosive materials.
C. A minimum of 12 ft. (squared) of surface area.
D.- Cannot interfere with switches or floats.
E. Shall be easily removable for thorough cleaning.
S. The mercury level control switch is required.
9. The pump chamber shall be inspected every six months to check
the condition and proper performance of the switch system,
pump, and alarms.
Mason County Dept. Health Services
APPROVED
Initials
Date
(colt"W) .........
10. Systems installed with a pump timer or counter and a pressure
gage shall be checked periodically to ensure that doses are
being delivered at the design volume and frequency; the pump
controls and throttling valve shall be adjusted accordingly.
11 . Observation ports shall be installed to monitor the effluent
in each trench or bed.
12. Non-corrosive shut-off type valves are to be installed between
the manifold and the laterials for final adjustment for
equal pressure to each laterial.
13. Pressure calculations on exact elevation difference" are as
close as possible due to no "exact" location of the system
components. Some minor recalculations may be required once
the home and septic components are in place. The gate valves
installed in each laterial will help regulate the needed
residual head.
14. Check valves are required in the manifold between laterals to
to reduce the amount of bleed back when pump system shuts down!
Mason County Dept.
OHealth SD ces
A,UPPRVE
Initials
Date
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Mason County Deft. Nes,ih Services
APPtOVED
Initials
T I Data
J 1. STAHDAW) GGlD'Oa�yTy
Standard system components used in alternative systems, such as septic tanks,
4-inch tightline and drainpipe, and drainrock, must meet the standards out-
lined in Mason County Department of Health services Standards for Convention-
al Sewage Disposal systems.
2. SNALL ULVU HR PIPa'
Tranaport, manifold, and lateral pipes moat be Class 200 or better.
3. sARRIYR MATYRIAL
GYOtextile (filter fabric) is required as a barrier material for all altaFna-
tive systems. -
4. PUMPS
A. Pumps must be effluent rated and constructed with cast iron housing,
stainless shaft, all stainless hardware, and oil-filled motor houe-
ing.
S. All electrical connections located exterior of pump chamber or in an
enclosed, Corrosion resistant splice box with cord grips.
C. Pump connected with disconnect coupling device above maximum effluent
level so that lines do not have to be cut in order to remove pump.
D. Pump equipped with flow measuring device in commercial systems
E. All mechanical components effluent rated.
P. Discharge pipe of effluent pump minimum of 11/. inches.
G. Pipe of noncorrosive nature; PVC pipe of Schedule 40.
H. Pump or enclosed vault inlet 2 inches minimum above bottom of the
pump chamber.
5. PUMP/SIPHON —awsvoc
A. In areas of high seasonal water tables, concrete pump/aiphon chambers
must be watertight. To insure this, they may be sealed with "Thoro-
seal" or its equivalent. Unsealed chambers must be filled with water
and allowed to stand overnight to assure no moze leakage than 0.001 x
total tank capacity.
H. Access cover constructed of durable material and water tight. -C. Access cover at or above finished grade and adequately secured.
D. Gasket used on contact surface between access cover and pump chamber
to prevent escape of gases and intrusion by insects or vermin.
E. Finish grade contoured to prevent surface water ponding at access
cover.
P. Pumps protected with screens or effluent filters.
.Fuson tuonty Dept. Health Services
APPROVED
Initial$
Date
6. CONTROLS
A. Adjustable mercury float switches utilized with redundant "oft."
B. Alarm sensor connected abave high level float switch to warn of pump
failure.
C. Alum circuit separate from pump circuit.
D. Alarm control box located within audible range.
7. MALNTSNANCN YRATDRYs
A. Minimum of 1 cleanout at the and of each lateral by using sweep 45'
B. Cleanout protected with section of capped 4-inch diameter PVC pipe
extended 4 inches above finished grade, or marked with metal stake
maximum of 6 inches below finished grade.
C. Minimum of two observation portsz one to detect ponding at Interface
between drainrock and sand; one to detect ponding at interface be-
tween sand and natural soil.
D. Observation ports constructed of 4 inch diameter PVC, extended 4 in-
ches above finished grade, or enclosed in durable, accessible box.
E. Observation ports equipped with easily removable cape.
8. A visual/audible alarm system is required.
Mitfan Cuunty Dept. Health Services
APPROVED
Initials
Date
II Revised 04/22/92
UL IUZY rUKM - YAUE TWO asvieea o9/i�/n
DESIGN CHECKLISTS
ITest
Plot Plan Scaled Layout Sketch Croes-Section Sketch
Reference depth from orig-
hole locations u Drainfield orientation inal grade:
and layout
perty lines �� u Septic tank lid and
'—' Trench/bed dimensions and drainfield cover depth
`=' Existing and proposed critical distances within
wells within 100 ft layout Reference depth from orig-
of property lines / inal grade and restrictive
rq_� D D-Hox/"T"/"L" locations strata:
`—' Critical distance L
measurements to cute, u Septic tank/pump chamber u Laterals, trench/bed
�banks, surface water �-7 location top and bottom
(�
'—' Location and orientation � Observation port location Curtain drain collector
of curtain drain and all absorption area ,�.� �Cleanout location D Sand augmentation
components
Manifold
placement No external reference needed:
Location and dimension Lq�
of primary system and u Orifice placement u Observation ports and
reserve area �i� cleanouts
'--' Lateral placement, with
DBuildings distances to edge of bed Additional mound information:
uy ^/
Direction of elope Audible/visual alarm �Upelope and downslope
indicatorreferenced fill width
Waterlines u Scale of drawing shown ETSettled cap depth at
on scale bar center and edge of bed
Roads/easements/ LL�
�,�driveways/parking Additional Hound Information: 1Fq_/idewall elope
`—' Critical resource land. Endelope width u Vp/downelope bed elevat.
(if applicable)
�� Overall fill dimensions Completed Resource Lands and
`D North arrow and scale of Critical Areas Checklist
drawing shown on bar
DESIGN APPROVAL
The undersigned designer 0 does, does not, waive the reqirement to be notified by the
installer of the installation and yen 48 hours to perform a final inspection prior to
cover. q j BPS SEPTIC DESIGNS
445 LOST HWY. W.
i ��i{ BREMERTON,WA 98312
The undersigned has rev'e and approv tleaign on bahalf ¢�Fjap� ,County of Health
Services. <<�i �P
MOTION: THIS DESIGN IS ONLY VALID vIFeSTAMPED "APPROVED" 8Y NASON CO. D$PT. OFHEALTH