Item 7A Tarrant County Public Health letterVEERINDER NINNY) TANEJA, MBBS; MPH
PUBLIC HEALTH DIRECTOR
June 11, 2019
CATHERINE A. COLQUITT, M.D.
LOCAL HEALTH AUTHORITY & MEDICAL DIRECTOR
TARRANT COUNTY
PUBLIC HEALTH
INNOVATION QUALITY ACCOUNTABILITY
SRI Southlake Villas, LLC, Narender Kasarla & Trium Development Partners, LLC, Dan Anderson
805 Glen Abbey Drive
Southlake, Texas 76092
RE: Maranatha Way Residential, Lots 1 — 13, Block 1
Dear Mr. Kasarla:
I have reviewed the material submitted for the referenced property. The following conditions are to
be noted:
1) City Sewer service is not currently available to this property
2) No On -Site Sewage Facility (OSSF) may be constructed without prior approval of this
office.
3) Soil conditions in the area frequently require alternative systems
4) Due to the presence of ponds, creeks and sharp slopes on lots 1, 2, 3, 4, 6, 9, 10, 11, 12, 13,
careful preplanning, prior to grading and construction, will be important to preserve optimal
soils, grades and necessary setbacks
5) A representative number of site-specific designs (lots 3 and 10) have been submitted, which
indicate an OSSF will be able to satisfy the state's minimum standards and receive a permit
6) Any new water well must comply with the Northern Trinity Groundwater Conservation
District's horizonal and vertical separation requirements, which were not included as a part
of this review.
We have no objections to the continued processing of this plat.
If you have any questions please feel free to contact me.
Sincerely,
Sam Adamie, R.S.
Environmental Health Division
Tarrant County Public Health
cc: Dan Anderson
1 10 1 S. MAIN STREET • FORT WORTH, TEXAS 76104 • IS 17) 321.4700
HTTP: //H EALTH.TARRANTCO U NTY. CO M
TARRANT COUNTY PUBLIC HEALTH �a
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NO Culp B.S.
P.O. Box 986 + Crowley, Texas 76036
Phone (817) 297-2342 + Fax (817) 297-4007
RE: 1825 Maranatha Way
Lot 3 and Lot 10
Southlake, Texas
Daniel,
May 29, 2019
A site specific design was requested for an On -Site Sewage Facility O.S.S.F. was
requested for 1825 Maranatha Way Lot 3 and Lot 10. These will also be determined by the
Builders and the placement of the house, pools, and driveways.
The soil classification is Class III per Soil Evaluation Report. The design was based on a
10,000 Sq. Ft. home ( 9 BRrn ) this would be about 600 gallons a day with a 1200 gallon aerobic
unit. The actual Sq. Ft. of the septic field would be 600/20 = 3000 Sq. Ft. with 2 zones.
Minimum requirements separation distance
Private Water
Ponds or Streams
Foundations
Property Lines
Underground Easements
Overhead Easements
Slopes
Ground Water
Restrictive Horizons
10 Ft.
50 Ft for Class III soil
None
5 Ft.
I Ft.
None
25 Ft. for Class III soil
I Ft.
6 Inches
If you have any questions, please call me at 817-297-2342 or 817-996-5040
S in aFI u
el .
fl��'e Culp R
May 29, 2019
DRIP IRRIGATION
FOR ON-SITE WASTEWATER DISPOSAL
Daniel Anderson
Lot 3
1825 Maranatlia Way
Southlake, Texas
House 9 BRM = 600 Gallons A Day Water Saving Devices
Pretreatment Tank 500 Gallon
Aerobic Tank 1200 Gallon
Pump Tank 750 Gallon
600 Gals. /.20 = 3000 Sq. Ft. Proprietary System
Class III Soil
3000 Sq. Ft. /2 Ft. Spacing = 1500 L.F.
1500 L. Ft. / 2 Ft. Spacing Emitters = 750 Emitters
Two Zones 75OSq. Ft. per Zone 15x100L.F.
15 x 100 L.F.
Flow Rate 15 P.S.I. = 1.3 G.P.H.
750 Emitters x 1.3 = 975 G.P.H.
975 / 60 = 16.25 G.P.M.
Irrigation Time 600 Gallons / 4.52 G.P.M. = 36 Minutes Per Day
600 Gallons / 9 = 40 Gallons Per Dosing
Pump Size 15 Ft. Head At 30 to 45 P.S.I
150 Mesh Filter Screen & Disc I Inch
Depth Of System
Cover
K -Rain Valve
Flush Valve & Vacuum Breaks
Tanks to Be pumped Every Two Years
6 To 8 Inches
Native Grass
2 Zones 1500 Sq. Ft. Each
Each field if 8 Ft. difference in Elevation
This design is representative of the current "state of the art" in effluent disposal system
design. It should function within normal limits and expectations and without causing
significant threat or harm to existing water supply systems, the public health or the threat
of pollution or nuisance conditions. However, due to the vagaries of both nature and than,
no warranty of this design performance is expressed or implied.
SEE ATTACHED PAGES
Drip fine Design
Site Evaluations
Example Designs
ti aF r -1%,
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2949
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tiv �
A subsurface drip line irrigation would typically consist of a septic tank, an
aerobic unit, a pumping tank, filtration system and the irrigation lines with
emitters. The effluent will flow from the residence to the septic tank for settling the
solid waste. An aerobic unit will further reduce the effluent by providing a rapid
and complete decomposition of organic waste materials and greater reduction of
pathogens. The treated effluent will then pass into the pumping tank to be dosed
out through the filtration system and into the lines at a predetermined dosing rate.
The drainfield shall consist of a matrix of lines and emitters arranged in almost any
configuration where the layout would ensure equal distribution throughout the
drainfield.
The drip irrigation system consist of small diameter pressurized lines buried
in the soil. The lines contain pressure reducing emitter spaced at intervals. The
purpose of the pressure reducing emitter is to restrict the flow of effluent from the
pipe into the surrounding soil to a very low rate. This distribution method promotes
uniform wetting of the soil in the root zone of surface vegetation. The shallow
depth of installation is an advantage of the drip irrigation system since the topsoil
or surface soil is generally the most permeable soil for accepting water.
All irrigation systems are dependent on a vegetative cover to prevent erosion
from the field and utilize the water applied to the rooting zone. Sites should be
quickly sodded or seeded and mulched with appropriate lawn grasses immediately
after installation.
This design is representative of the current "state of the art" in effluent
disposal system design. It should function within normal limits and expectations
and without causing significant threat or harm to existing water supply systems, the
public health or the threat of pollution or nuisance conditions. However, due to the
vagaries of both nature and man, no warranty of this design perfo
expressed or implied. KE
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Aerobic Chlorinator
unit /
Wastewater /11/ Sampling
P box
Septic
tank level
switches
IF
pump
Air compressor Dosing
chamber
Flush line .,,
5
Treated
Effluent
-40.-
To subsurface
drip system
Flush
valve
Valve box
Compresion adapter
Driplines
Emitters
Moisture
sensor
\Ik
(optional)
Header
line_,,
- - - - - - -
I
- - - - - - - - - - - - -
Control valve
- - - - -- -
-
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Treated
effluent
Screen
Filter
Timer
Water meter
Pressure
- - - - - - -
(optional)
regulator valve
Box
Treated
Effluent
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To subsurface
drip system
Flush
valve
Valve box
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WASTEFLOW Classic
Flow Rate vs. Pressure
Pressure
Head
ALL WASTEFLOVI
psi.
ft.
Classic- Dripline,
10 psi
2' )A 0 E
.81 gph
15 psi
34.65 ft.
1.00 gph
20 psi
46.20 ft.
1.16 mph
25 psi
57.75 ft,
-------
1 31
-- gph
30 psi
69.30 ft.
1.44c, P.1
35
psl
80 80
1,37 ph
40 psi
92.40 ft.
1.68 goh
45 psi
1013.95
1.80 gph
Maximum Length of Run vs. Pressure
Flo -,v variation
Pressure
Head
Emitter Spacing
psi
ft_
24"
.18-1
12"
1.0 -psi
2110 ft.
170*
165'
100'
15 psi
34.65 ft.
170'
165,
100,
20 psi
46-20 ft.
1701
-D
161
25 -psi
57.75 ft.
170'
165'
100 -
30 psi
69-30 ft.
170'
165'
100,
80.85ft.
170'
165'
1001.
40 psi
92.40 ft,
-- -
1701
---- ---
1651
100'
45 psi
103.95 ft,
170'
165'
100'-
Kd=0.9 CA-
< 05
PSI
Available in 2 standard models
\VF1 6-4-24 WASTE FLOW ('-'lassie 24"/ 1.3gph
WF1 6-4-12 \X7ASTEFLOW Classic 12"/ 1.3gph
luternate flog- rates, diameters and spacing aNailable upon
request.
WASTEFLOW Classic Specification
The dripline shall consist of nominal sized one-half inch
linear low density Polyethvwith tubing, th turbulent flow
drip emitters bonded to the inside wall. The drip emitter flog-
.passage
ow,passage shall be 0.033" x 0.073" square. The tubing shall have
an outside diameter (O.a) of approximately .64 -inches and
an inside diameter J.D.) of approximately .55 -inches. The
tubing shall consist of three la�lexs; the inside layer shall be
Geoshieldg-- protection, the middle layer shall be black and the
outside layer shall be purple striped for cam, identification.
The dripline shall have emitters regularly spaced 24" (or 12")
apart. The turbulent floe- emitters shall be molded from virgin
pol\.ett-rdene resin. The turbulent flow emitters shall have
nominal discharge rates of 116 gallons per hour at 20 psi. The
emitters shall be impregnated with Treflan® to inhibit root
intrusion for a minimum period of fifteen years and shall be
guaranteed by the manufacturer to inhibit root intrusion for
this period, NVASTEFLOW Classic dripline shall be Geoflo-,N-
model number VT16-4-24 (or WTI 6-4-1 -2),
Wasteflow Clasic I gph
Pressure Loss vs. .senth of -Run
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Wasteflow Clasic I gph
Pressure Loss vs. .senth of -Run
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May 29, 2019
DRIP IRRIGATION
FOR ON-SITE WASTEWATER DISPOSAL
Daniel Anderson
Lot 10
1825 Maranatha Way
Southlake, Texas
House 9 BRM = 600 Gallons A Day Water Saving Devices
Pretreatment Tank 500 Gallon
Aerobic Tank 1200 Gallon
Pump Tank
750 Gallon
600 Gals. /.20 = 3000 Sq. Ft. Proprietary System
Class III Soil
3 )000 Sq. Ft. / 2 Ft. Spacing = 1500 L.F.
1500 L. Ft. / 2 Ft. Spacing Emitters = 750 Emitters
Two Zones 750 Sq. Ft. per Zone I0x150L.F.
30 x 50 L.F.
Flow Rate 15 P.S.I. = 1.3 G.P.H.
750 Emitters x 1.3 = 975 G.P.H.
975 / 60 = 16.25 G.P.M.
Irrigation Time 600 Gallons / 4.52 G.P.M. = 36 Minutes Per Day
600 Gallons / 9 = 40 Gallons Per Dosing
Pump Size 15 Ft. Head At 30 to 45 P.S.1
150 Mesh Filter Screen & Disc 1 Inch
Depth Of System
Cover
K -Rain Valve
Flush Valve & Vacuum Breaks
Tanks to Be pumped Every Two Years
6 To 8 Inches
Native Grass
2 Zones 1500 Sq. Ft. Each
Each field if 8 Ft. difference in Elevation
This design is representative of the current "state of the art' in effluent disposal system
design. It should function within normal limits and expectations and without causing
significant threat or hann to existing water supply systems, the public health or the threat
of pollution or nuisance conditions. However, due to the vagaries of both nature and man,
no warranty of this design performance is expressed or implied.
SEE ATTACHED PAGES
Drip Line Design
Site Evaluations
Example Designs
A subsurface drip line irrigation would typically consist of a septic tank, an
aerobic unit, a pumping tank, filtration system and the irrigation lines with
emitters. The effluent will flow from the residence to the septic tank for settling the
solid waste. An aerobic unit will further reduce the effluent by providing a rapid
and complete decomposition of organic waste materials and greater reduction of
pathogens. The treated effluent will then pass into the pumping tank to be dosed
out through the filtration system and into the lines at a predetennined dosing rate.
The drainfield shall consist of a matrix of lines and emitters arranged in almost any
configuration where the layout would ensure equal distribution throughout the
drainfield.
The drip irrigation system consist of small diameter pressurized lines buried
in the soil. The lines contain pressure reducing emitter spaced at intervals. The
purpose of the pressure reducing emitter is to restrict the flow of effluent from the
pipe into the surrounding soil to a very low rate. This distribution method promotes
uniform wetting of the soil in the root zone of surface vegetation. The shallow
depth of installation is an advantage of the drip irrigation system since the topsoil
or surface soil is generally the most permeable soil for accepting water.
All irrigation systems are dependent on a vegetative cover to prevent erosion
from the field and utilize the water applied to the rooting zone. Sites should be
quickly sodded or seeded and mulched with appropriate lawn grasses immediately
after installation.
This design is representative of the current "state of the art" in effluent
disposal system design. It should function within normal limits and expectations
and without causing significant threat or harm to existing water supply systems, the
public health or the threat of pollution or nuisance conditions. However, due to the
vagaries of both nature and man, no warranty of this design perfo 0 4rb%�,
expressed or implied.
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17. VI
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PREMIER DIUVE AND RUJSSEAU
P"Nol TEXAS
Aerobic Chlorinator
unit
Wastewater Sampling
r, box
Septic level
tank
switches
pump
Air compressor Dosing
chamber
Figure 1_. Pretreatment System:
Flush cine
F
I
Compresion adapter
Driplines
Emitters
Moisture
sensor 41�\
(optional)
Header
line,
---- -
- _ - - - ^ - Control valve ,�
� i ooaa
q qq o
Treated Screen
effluent Filter Water meter Pressure Timer
i
(optional) regulator i - Valve
Treated
Effluent
To subsurface
drip system
w
v �
Flush
valve
Valve box --
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WAS TEFLOW Classic
Flow Rate vs. Pressure
Pressure
Head
ALL NVASTEFLONXI
Psi,-
ft.
Classic Dripline
10 psi
23.10 ft.
.81 gph
-- J 5 Psi
334 605 ft.
1.00 gph
20 - psi
-
MY
100,
9-5 psi
57.75 ft.
1.31 gph
30 psi
6930 ft.
1.44 gph
35 psi
80.85 ft.
1.57 gph
40 psi
92.40 ft.
1.68 gph
45 psi
103.95
1*80 gph
Maximum Length of Run vs. Press -are
Flow variation +/- 5%
Pressure
Head
Emitter Spacing
psi
it.
24"
181
12"
10 psi
23.10 ft.
170"
MY
100,
15 psi
34.65 ft.
170'
165'
100,
20 psi
46.20 ft.
170'
165'
100,
25 psi
57.75 ft.
170'
165'
100,
30 psiµ
69.30 ft.
170'
165'
100'
35 psi
v 80-85 ft.
170'
165
1(10'
40 psi
92.40 ft,
170'
165'
100,
45 psi
103.95 ft.
170'
165'
100"
1td=0.9 Cv
< .03
Available in 2 standard models
WF16-4-24 V7ASTEF-LONN' Classic 24"/1.3gph
WF16-4-12 \VASTEFLOW Classic 12"/1.3gph
Alternate flow rates, diameters and spacing available upon
request,
WASTE, FLOW Classic Specification
The dripline shall consist of nominal sized one-half inch
linear low density polyethylene tubing, with turbulent flow
drip emitters bonded to the inside wall. The drip emitter flog
.passage shall be 0.053" x 0.053" square. The cubing shall have
an outside diameter (O.D.) of approximateli .64 -inches and
an inside diameter J.D.) of approximately .55 -inches. The
tubing shall consist of three lavers; the inside laver shall be
Geo shieldCz., protection, the middle laver shall be black and the
OUtSide jayer shall be purple striped for easy identification.
The dripline shall have emitters regularly spaced 24" (or 12")
apart. The turbulent flora- emitters shall be molded froth -virgin
polyethylene resin. The airbulent flow emitters shall have
nominal discharge rates of 1,16 gallons per hour at 20 psi. The
emitters shall be impregnated with Treflan( D to inhibit root
intrusion for q minimum period of fifteen years and shall be
guaranteed by the manufacturer to inhibit root intrusion for
this period. V'-,-STEFLOW Classic dripline shall be Geoflo,,i-
model number WFI 6-4-24 (or WF1 6-4-12).
Wasteflow Classic I gph
Pressure Loss vs. Length of Run
DAVIS StVM I M 1938
IVARIABLE WIDTH ROW)
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