HomeMy WebLinkAboutIMPV-6-11-18804.TIF � CATAWBA COUNTY Case # IMPV-6-11-18804
G Public Health Department Subdivision
�" y Environmental Health Division
v m� "< PO Box 389, 100-A Southwest Blvd, Newton, NC 28658 Lot #
l S� PIN# 279119603629
Applicant/Owner $RYAN MCDANIEL
Site Address: 5373 N BETHEL CHURCH RD, Hickory, NC
Property Size: SF 1.899 ACRES
Directions: 127 S LEFT ON BETHEL CHURCH APPROX 2 MILE RIGHT ON LEFT. DIRECTLY ACROSS FROM WOODRIDGE DR.
Improvement Permit
Faci�ity: primary Residence
Permit Category: Expansion Bedrooms 5
WATER SUPPLY: Private Well
Basement? No Basement Plumbing? No
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INITIAL SYSTEM SPECIFICATIONS
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Permit Valid: Expires In Five Years: _X No Expiration:
Projected Daily Flow 600 9•P•d
Proposed Wastewater System: LOW PRESSURE PIPE
Type: IVA - ANY SYSTEM WITH LPP DISTRIBUTION
PUMP REOUIRED * * * * * OPERATOR REOUIRED
Permit Conditions: SEE ATTACHED PERMIT CONDITIONS
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
REPAIR SYSTEM SPECIFICATIONS
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Repair System Required? Required
Proposed Wastewater System: LOW PRE PIPE
Type: IVA - ANY SYSTEM WITH LPP DI5TRIBUTION
PUMP REOUIRED ***** OPERATOR REOUIRED
Landscaping or other site alterations that potentially divert groundwater or surface water toward the septic system, or prevent proper drainage
away from the septic system, including the direction of gutter flows or foundation drains, is not aoproved, and may result in failure to approve the
initial system installation, or the suspensioNrevocation of existing permits.
The issuance of this permit by the Health Department does not guarantee the issuance of other permits. It is the responsibility of the
applicant/property owner to insure that all Catawba County Planning/Zoning and Building Inspections requirements are met. This
Improvement Permit is subject to revocation if the site plan, plat or the intended use changes, or if site conditions are altered. The
Improvement Permit is not affected by a change in ownership of the property. This permit was issued in compliance with the
provisions of the North Carolina 'Laws and Rules far Sewage Treatment and Disposal Svstems' (15A NCAC 18A .1900). Neither
Catawba County nor the Environmental Health Specialist warrants that the septic tank system will continue to function satisfactorily
Mike Cash 06/10/2011
AUTHORIZED STATE AGENT APPROVAL DATE
Permit Expiration Date: 06/08/2016
No grading or construction activity is allowed in areas designated for system and repair without approval of the Health Department.
06/10/11 10:58
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Db. 2611, Pg. 491
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Pb. 43, Pg. 169
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Additional Permit Conditions for the Imnrovement Permit
And Authorization to Construct the Wastewater SYstem
Brvan McDaniel Residence —3373 Bethel Church Rd., Hickorv, NC
Catawba County Case #EHPR-9-10-7183
l. This system is a Type IV system with low pressure pipe distribution, designed to
serve a 5-bedroom single family residence only with a daily design flow of 600
gallons per day. All construction and system component installation shall be in
accordance with the attached plans, specifications, and conditions provided by
Catawba County Environmental Health.
2. The septic system contractor shall be required to lay out the entire system and
schedule a pre-construction conference with a representative of Catawba County
Environmental Health on site prior to initiating construction of the system.
Installation Contractor shall be certified at a minimum Level 4.
3. All prefabricated concrete pump tanks shall be leak tested and approved prior to
installation of pump system components.
4. The electrical control panel shall be a simplex panel enclosed in a NEMA 4X box,
fitted with an added elapsed time meter and event counter for maintenance and
monitoring purposes.
5. All components of the system shall be installed in accordance with design and
manufacturer's specifications, all permit conditions, and shall be demonstrated as
properly functioning prior to approval.
6. Pressure head at the end of each lateral shall be maintained at a minimum of two
feet.
7. Final landscaping of the nitrification fields shall be performed by placement of
approved soil cover over the entire field, slightly mounded in the center, and
gently sloped to the sides to shed surface water from the field. Seed and straw
shall be applied to the finished surface and appropriately maintained.
8. The system is categorized as a Type IV. A contract with a certified subsurface
system operator, signed by all required parties, shall be submitted to Catawba
County Environmental Health upon completion of installation and prior to final
approvals. Required ORC inspection frequency is twice yearly.
LPP System Design Summary
Design Flow: 600 gpd
LTAR: 0.15
Total Area Required: 4000 sq ft
Total Lateral Length Required: 800 Lin ft
Number of Fields: 2
Laterals per field: 5
Lateral Lengths Field 1: Line 1 Line 2 Line 3 Line 4 Line 5
80 ft 80 ft 80 ft 80 ft 80 ft
Lateral Lengths Field 2:
80 fit 80 ft 80 ft 80 ft 80 ft
Orifice Size: 5/32
Orifice Spacing: 7.27 ft
Orifices per Lateral: 11.00
Pressure Head: 2.00
Flow per Orifice: .41 gpm
Flow per Lateral: 4.46 gpm
Flow per Field: 22.32 gpm
Total Flow for System 44.64 gpm
Lateral Pipe Size: 1.25 in
Manifold Pipe Size: 3.00 in
Supply Line Pipe Size: 2.00 in
Supply Line Length: 100 ft
Dosing Volume (total): 350
Tank Size Required (ST): Add 1000 gal (new)
Tank Size Required (PT): 1500 gal
Tank Drawdown: 10 in
Total Dynamic Head: 15.52 ft
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RECOMMENDED DESIGN CONSIDERATIONS FOR
PREVENTING COMMON LPP PROBLEMS
(OSWS/DEH/NCDEHNR - 2/95, rev. 3/96; addendum to "Design of Large Low-
Pressure Pipe Distribution Systems in North Carolina", Marinshaw, 1988)
DESIGN REQUIRED RECOMMENDED
COMPONENT
Lateral Line 1-inch minimum. 1- 1/4-inch. - l-1/2-inch maximum.
Diameter
Trench Width 8 inches, minimum. 12 inches, minimum. 18 inches,
recommended when site
conditions allow.
Protect trench with geotextile
fabric (see below).
Washed Gravel #3, 4, 5, 57 or 6 of #5 of ASTM D-448
Classification ASTM D-448
Orifice Size 5/32-inch for 2/3 of 5/32 -inch, minimum. 3/16-inch,
holes, minimum. minimum, for food services
1/8-inch, absolute min. Protect orifices by sleeving or
for t/3 of holes. shielding (see below)
OTHER RECOMMENDATIONS
1. Sleeve laterals in 3- or 4-inch conventional nitrificatio�r line perforated tubing. Reduces the
effects of rock shadowing and root intrusion and enables easy removal or replacement of the LPP
laterals, if necessary. (See Figures 1 and 3)
2. Following iterrt 1, drill all orifices facing upwards, exceptfor a hole 1/3 of the way from the
beginnirag and end of each line which should face down. Having the orifices face up: helps bleed air
out of the system better during pressurization; ensures no shadowing of these orifices by rock, roots,
or perforated pipe corrugations; helps breaks the air block better after pump shut off, reducing
siphonage from (aterals to the supply manifold, which, in turn, may reduce the overloading ofthe
lower laterals; and allows less opportunity for hole clogging by solids and bioslime. Having the two
holes on each line face down allows effluent to drain after pumps shut off which: prevents
anaerobic conditions inside the laterals; prevents standing water inside the laterals which could
possibly attract plant, grass, and tree roots; and prevents freezing of the laterals (though typically
not a problem in southeastern climates). (See Figure 3)
3. Use one 90-degree bend for lateral turn-ups, not one or two 45-degree bends. This will facilitate
accurate measurement of operating pressure head in the laterals. Using one or two 45-degree bends
for constructing the manifold cleanouts, however, would be warranted. (See Figure 3)
4. Use geotextile fabric over the tr�ench, at the gravel - backfill interface. Prevents the infiltration of
small soil particles into the trench voids. (See Figures 1 and 3)
3- or 4-inch Perforated Geote�rtile Fabric
Pipe Sleeve
� M, �.
a'a
11ia_inch
PVC Lateral
FIGURE 1: Cross-Sectional, Profile Detail of Recommended LPP Trench
5. For LPP laterals, tee off of the manifold directly using, for example, a 3"x 3"x 1-
1/4" tee, rather than "bushing-down", (ie. using a 3" x 3" x 3" tee with reducing fittings to 1-1/4").
This results in a hydraulically smoother transition and allows less opportunity for irreversible solids
accumulation. (See Figure 2)
3" a 1 ���"
� Reducer
3"x3"xl«-
Reduciog Tee
/ 3"x�"
� Tee
fG �1
3" 3upply Manifold 7" Supply Maoltold
RECOMMENDED NOT RBCOMMENDED
FIGURE 2: Side, Profile Detail of Recommended Su�ply Manifold-to-Lateral Connection.
6. Elbow the manifold-to-lateral connecl�ion over the earthen dam, particularly on sloping sites.
This reduces effluent drain-back through the manifold or along the manifold trench. (See Figure 3)
Lateral'Ilirn-Up and Cap
with Protective Sleeve LPP Lateral with 3- or 4-inch Perforated
withThreadedPlug Geotextile Recommended Orifice PipeSleeve
Fabric Orientation
Elbow (typ.)
uI� ��, "
x' p� �� � �r = w
Gravel Trench
Supply Manifold
a ,
Compacted Eazthen Dam
FIGURE 3: Side, Profile Detail of Recommended LPP Trench, including Cross-Section of
Recommended Manifold-to-Lateral Connection.
7. Provide two cleanouts on each supply manifold for LPP systems on sloping sites; one at the
beginning (typically, the bott�om) and one at the end (typically, the top) of the line. Facilitates
cleaning out the manifold after blowing out the LPP laterals, without reintroducing solids into the
LPP laterals.
8. Use the smallest pressure-adjustment gate valves which do not cause the total dynamic head of
the system to exceed that which can be adeguately handled by a reasonably-sized pump. This is
typically achieved using gate valves which are one nominal size snzaller than the effluent supply line
or manifold (whichever is smaller). The use of smaller valves allows for more precise pressure head
adjustment. There will typically also be a net cost savings associated with the use of a smaller valve.
In fields served by multiple manifolds, place all pressure-adjustment gate valves in a comnzon area
for easy adjustment by one individual.
9. Design/configure system to prevent or offset the hydraulic overloading of the lower laterals.
Overloading of lower LPP laterals is anticipated because: the lowest laterals fill up with effluent
first and drain last, and they will receive effluent stored in the manifold and, perhaps, upper LPP
laterals after dosing. Additionally, lateral, subsurface movement of water through the drainfield may
occur, potentially contributing to the overloading of the iower laterals. There are several ways to
alleviate these problems, including item number 6, listed above, as well as the following:
A. Desigrr the system to "overload" the � laterals during dosing. This can be accomplished by
varying the orifice spacing arad/or orifice size an�ong the LPP laterals.
B. Incorporate a drainback mechanism to return effluent to the pump tank between doses.
C. Configu�e fields Co make maximurn use of slo�e width (along contour), lhereby reducing the
number of lines installed at different elevations.
D. Use check valves to keep effluent dosed to the upper subfields from draining to the lower subfield
laterals.
E. Split flow to the subfields or laterals using a pressure manifold above the highest lateral, to
prevent redistribution of effluent to the lower subfields or laterals.
10. Use effluent filter(s) for the outlet of the septic tarrk. The use of effluent filters prevents the
carry-over of solids to the LPP fields, which may result in orifice clogging and premature failure of
the LPP system. Other forms of pretreatment should also improve LPP performance.
11. Provide an elapsed time meter and cycle counter for each pump in the corrtrol panel. Knowing
the pump run time, number of pump cycles and pump tank drawdown or dose volume allows the
operator and/or inspector to monitor delivery rates to an LPP network for comparison with design
delivery rates. As orifices in the LPP network become clogged, delivery rates will decrease thereby
alerting personnel that further inspection and maintenance, or perhaps, repair of the system is in
order.
12. Utilize lower long term application rates (LTARs) for LPP system design. More conservative
sizing of LPP systems should decrease the potential for hydraulic overload of the trench infiltrative
surface. Recommended LTARs are as follows:
Soil Group Recommended LTAR
I 0.50-0.35
II 0.35-0.20
III 0.20-0.10
IV 0.10-0.04
DEPARTMENI' OF ENVIRONMENT AND NA'IURAL RESOURCES � ,Sbeet _ oj_
DIVISIDN OF ENVIRONMEA�i'AL HEALTH PROPERTY ID �:
, ON-SITE WASTEWATER SECTiON COUNTY:
SOIL/STTE EVALUATION
�� .�� �� i � j for ON-SITE WASTEWATER SYS M �_� � 71 g 3
owr�: r� �-1 �� AP PLICATlON DATE 3 f b
ADDRESS: DATE EVAI, ATFD: lo ?/a
YROPOSED FACII.ITY; 5 R- US� ROPO��D DFSIGN FLDW (.1949): PROPERTY SIZE: �• `I A�
LOGATION OF SITE: (�d PROPERTY RECORDID:
V�'ATER SLTPPLY: � Pavate � Public �f Well � 5pring � Otber
EVALUATION MET$OI?: � Augar Boring 0 Pit � Cut �
TYPE OF WASTEWATfR: � Sevrege � Industrial Process � M'ixed
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. � n OTHER(S) PRESENT: ✓
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COMMENTS: R ,
n� ee �-� , ��w -� � r>- '�, � c wv� r�o �-���
a �.l�b�e 5��c cu�- � � � .���� J .
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. . LEGEI�'D . � .
use the followin,� standard abbreviations .
SOIL CONVEh'TIONAL LPP MItA`ERAIAGY/
LAT�`DSCAPE POSfT70N CROVP � .I955 LTAR• .1957 LTAR• COTSiSTENCE STRUCTURE
C� (Concave Slape) I S(Saad) 12 - 0.8 U.6 • 0.4 11F.XP (Non�ezpansn'c) G(Sm�le Gmm)
• CV (Coavac Slope) I.S (I.oatny Saad) 5 � ��6�9 �P�^'�) Z`'� (M�'"'
D (p�iaege G'ey) . � F� (�i�'�) CR (Cx�b)
DS (Dc.bris SkmP) II SL (Sandy.f�em) 0.8 - 0.6 OA - �3 �R (�'�T�
SBK (Sul�gai� Biocky)
F'P (Flood Plaial� L �'O�) . ABK (Aab'�B�Y)
FS (Foot Slope) � ' ' PL (Plary)
H(Head S�op�,1 III . SCL (Saady Clsy Loam) 0.6 - 0.3 03 - 0.15 PR (Pri�atic) .
L (Iaa�r S1aP�) SiL (Silt Loem) ' .
2�' (Ncu Slops) CL (Clsy Loam) . MOiS'� a
R {Ridse) SiQ. (Silry CleY Loam1
Si (Silt)
S(Sboulds Slnpr.) vFR.NaY Frieble) NS (Nao�y�
T ��� � N SC (Seady CIa7') 0.4 - a. 02 - 0.05 ��ri��� ss csr,�m� sea�
' . . 5iC (Silty Cley) F7 (F'um) S (St'r.ky)
. C(C1ey) VFI (ve�' Fi� v. Vcy Sti�Y1 � NaY �Yl
� - ' p �p Noac EF7I�zmdy Ficm3 � (
SP (SL�tfy Plnuie)
. s Adjuct LTAR due tc depth, coasittence, strneture. cnil wemesc, taa scap4 dGoa, wastewatrr iloor and q6afit). P(P3aale)
. VP (Very Ptaatie)
p . . • .
HOP,fLONDEPTX �. Tn �ec b-•low naimai so� �{ece
AEPTX OFFII.L In um:ba imm Iend svde ;e • •
P.ESTEfCT11'E' HORIZON Tnir�xc end d.�tL fi� laad su�acc �
S�fPROLlTS S(suimble) or U(imsviffible)
SD.� A'�?T�'FSS Incha fra� land str.fo.:e tn fr� a�stu or in:bss fmm tn cal K� th chroma 2�{ea -:cmd M�m�ll m1� chip dr.sgmtion
CLLSS�7GfT70N S(Suitn��, P5 (PmvicionaIly Suitablc), or U(i3n tsbL-) ,� .
Eve}uatenn nf si�paniite sha11 h: by pits.
I,oas-tteffi Ac..�praax P.ace (LTAR): gaUday/A�
S6ow nrotle lo�tinns ead otber sik i res (dim ncions. refe na or beachmark end Northl.
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Catawba County, North Carolina
N This map product was prepared from the Catawba County, NC, Geographic Information System.
Catawba Counry has made substantial efforts to ensure the accuracy of location and labeling information
contained on this map. Catawba County promotes and recommends the independent ver�cation of arry
data contained on this map product by the user. The Counry of Catawba, its employees, agents and
personnel disclaim, and shall not be held liab/e for atry and all damages, loss or liability, whether direct, indirect
or conseguential which arises or may arise from this map product or the use thereof by arry person or entity. Legend
Selected Parcel Number: 2791-19-60-3629
1 inch = 100 feet Prepared for:
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�'� THIS IS NOT A LEGAL DOCUMENT Wednesday, September 15, 20101L•50 AM
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