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ON-STTE WASTE¡ÍATER TREÀÍIÍEI{T SYS:TEDI
lBD CR 23?
TRâCT 2{
Sflf' COI.,ORADO
CARFIELD COT'![TT
September 73, 2019
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Prepared By:Kenneth J. BrotskY, P.E"
558 Rio Oso Lane
Grand Junction, CO 81-507
(970)2]-6 8861
I. INTRODUCTION:
This Report has been prepared at the request of Clayton Homes,
representatíve for the above referenced property. This Report
addresses the design of an On-Site !üastewater Treatment System to
serve a proposed residence. Public setrrer service is not
avai-labl-e.
The procedures used in this report follow the "Garfiel-d County
On-Site lrlastewater Treatment System Regulations" -
II. SOITS AI{D PERCOIJITION TESÍ:
The site is a sloping, high desert areaf wlth ground slopes
generally about 1-lä to the east-south-east. The tract has
recently been cleared of vegetation, which originally conslsted
of salt grass/þrush.
A test hole hras dug in the general area of the proposed OÍf,TS.
The upper !2u of soil- is loamy. clay topsoil" From t2 to 48"
there j-s grey, silty, clay. Below this layer to 702" is a 9rêY,silty, clay"
Percol-ation rate in the clay layer is 24 minutes per inch and in
the silty clay it is 30 minutes per inch. A Long Term Acceptance
Rate of 0.1 gallons per square feet per day will be used for
design.
Because of the sloping topography (11?) two beds will be used
wi-th 2 rows in each bed. The second bed will be set
approximatel-y 2' lower than the first bed, foLlowing the existing
contour.
The bottom of the absorption bed wil-l be set at 28" below the
existlng grade at the southeast end of each bed.
ITT. SYS|[E.' DESIGII:
A. Estimated Sewage Flow: The proposed house will be 3
bedroom.
3x150 450 gallons per day
B
fol-1ows:
Adjustment Factors:
Table 5.2
Septic Tank
Use a 1,000 gaIlon tank.
Absorption Bed:
The absorption bed
A - 450/.7
642.9 sq. ft.
si-ze is caLcul-ated as
c
Method of Application is gravity
Factor L.2
Table 5.3 Type of Distribution is Chambers
Factor 0.70
Bed Size required is 642.9 x L.2 x 0.70 = 540 Sq. Ft
Total Number of chambers reguired is 540/1'2: 45 units
Use bed configuration, with 4 rows and 12 chambers per row
for a total of 48 chambers.
KENNETH J. BROTSKY, PE
No. 1-8843
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PERCOLÄTION TEST DATA TABLE
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HOLE
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DEPÍ}I ÏIIIE/Zi¿Þ,// r sÔ tz tb DROP RATEmPt AtrË.
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14)3¿, -*g /34 3//¿ 4/q Z'/2.zy
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SOIL PROFILE
RATE SLOWERTHAN 60 MPI lV HOLq LOCATION pIAGRAM
RATE I'Á,STERTHAN5MPI N
SLOPE GREATER THAN 30"/o:tL
HS\ilT DEEPER THAN 4 T'T. r'
BEDROCT(I,ESS THAN 4 FT. 'J^lON-SITE WATER
REPAIRAREA
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HSWT
COMMENTS
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SNT BOTTOM OF INFILTRATORS
2g" BELOW EXISTING GRADE
A:r sourHEAS.I' Co_ll{ER oF' EACII yto
NOTES
1. _ contact xngineer for inspectiôns at the folLowing tlmes3 (Atlow at J.east 24 hours advaircenotice). (Englneer srill cooldfnate ingpection time wíth ¡elta County)
1) glhen installation of the infíLtrators, píping, and septlc tank is complete but notcovered, and ready for final inspection,
Englneer ís Kenneth J. Brotsky (970) 216-g961
2. The plpe from the.house-p].unbing_t-o the septic tank and from the tank to the absorptlon bedshall be 4 inch dlamet,er, SDR 35, PVC sewer plpe. The pipe shal1 be Laid at a minírnum slopeot t/4 Ínch per foot.
3. TNFTLTRATOR unlts to þe instalred per manufacturer'å reconmendatlons. unlts to be,.euick 4...Geo-text1le landscapíng fabrlc shaLl þe draped over the rnfiltrat,ors as shown.
!4. The septlc tank shall be a L.000 gallon, 2-compartment tank approved by Garfield County.
5. AIl" constluction shal] be ln accordance r.rith Ga¡field cour¡Èy On-Site ¡ì¡âstewater TreâtmentSysten Regulations'r, most current editlon.
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QTIICK4 INFILTRATORS
4 ROWS, 12 EACIr ROW
= f8 TOTAL
t"J4{
6. Any changes to the layout on these drawings ¡nust have the approvâÌ of the Engíneer prlor toconstruction. Any unauthorized changes may have to'be correctéå. Any costs tór redråwing ofplans required because of unâutho!ízed changes may be back chargea to thé installer.
7. tnstaller responsíble for calllng for ..tocates,r.ê¿./r
An OWTS Permit must be obtained from Garfield county prior to starting installation ofsystem
CLEANOTIT
BACKT'ILLIVITH
NATIVE IIIÀTERIAL
i _ I _ _-:'
I0l¡ll GALLON
SEPTICTANK
SEENOTES.SET ITEE'
TOÞOFAOUSE
FO't h¡ùAnoNro0.o
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SCALETt'- !9'
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SCHDTI4:IXITEN:q[r.olqllf ,
2 BEDS, SEE SECTION A
4Rolvs@12EACHROW
= ¿8 TOTÀL
SET BOTTOM OF IN¡'TLTRATORS¡
28f BEI,OWEXISTINGGRÂDE
AT SOIJTIIEAST CONNER
OFEACH BED
12'MINIMIJM COVER 36" CENTER TO CENTER
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srTE PLAII, DETAILS, & NOTES
ON-SITE WASTEìVATER TREATMENT
sYsrEM (owrs)
TBD - CR 237
TRACT 24
srLT, coLoRAIlo
GARFmLD, COUNTY
24'DIAMETER
RI'PEnls|Êlr FÂSTD¡I
ì sET BOmoM OF rnfiFrLTRÁ,TORS
28tr BELOW EXISTTNGGRADE
AT SOUTHEAST CORNER
OFEACHBEI)
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