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Home My WebLink AboutNC0078271_Permit (Issuance)_20020422NPDES DOCUMENT SCANNIN` COVER SHEET AMA 410, NC0078271 Betsy -Jeff Penn 4-H Educational Center NPDES Permit: Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Site Plan Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: April 22, 2002 This document is printed on reuse paper - ignore arty content on the re'rerse side /J vt!'_ NCDENR Mr. Jeff North Betsy Jeff -Penn 4-H Educational Center 804 Cedar Lane Reidsville, North Carolina 27320 Dear Mr. North: Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality April 22, 2002 Subject: Issuance of NPDES Permit NC0078271 Betsy Jeff -Penn 4-H Educational Center WWTP Rockingham County Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,1994 (or as subsequently amended). There have been two significant changes from the draft permit previously sent to you on February 13, 2002: > The Supplement to Permit Cover Page has been updated to show UV disinfection at your facility. > The 28 µg/L limit for total residual chlorine applies (TRC) only if chlorine is used for disinfection. Otherwise no limit or monitoring is required for TRC. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Charles Weaver at telephone number (919) 733-5083, extension 511. cc: Central Files Winston-Salem Regional Office/Water Quality Section NPDES Unit j N. C. Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 Internet: h2o.enr.state.nc.us Sincerely, ORIGINAL SIGNED BY SUSAN A. WILSON Gregory J. Thorpe, Ph.D. Phone: (919) 733.5083 fax: (919) 733-0719 DENR Customer Service Center 1 800 623-7748 Permit NC0078271 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, North Carolina State University is hereby authorized to discharge wastewater from a facility located at the Betsy Jeff -Penn 4H Educational Center WWTP NCSR 1993 northwest of Reidsville Rockingham County to receiving waters designated as Carroll Creek in the Roanoke River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective June 1, 2002. This permit and authorization to discharge shall expire at midnight on April 30, 2007. Signed this day April 22, 2002. ORIGINAL SIGNED BY SUSAN A. WILSON Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0078271 SUPPLEMENT TO PERMIT COVER SHEET North Carolina State University is hereby authorized to: 1. Continue to operate an existing 0.0084 MGD wastewater treatment facility with the following components: • Septic tank • Dosing tank • Recirculating sandfilter • Ultraviolet disinfection system This facility is located off NCSR 1993 northwest of Reidsville at the Betsy Jeff -Penn 4H Educational Center WWTP in Rockingham County. 2. Discharge from said treatment works at the location specified on the attached map into Carroll Creek, classified C waters in the Roanoke River Basin. Quad: Southeast Eden, N.C. Latitude: 36°23'35" Longitude: 79°42'1 S" Stream Class: C Subbasin: 30203 Receiving Stream: Carroll Creek NC0078271 Betsy Jeff -Penn 4-H Educational Center WWTP North SCALE 1:24000 Permit NC0078271 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location Flow 0.0084 MGD Weekly Instantaneous Influent or Effluent BOD, 5-day (20°C) 30.0 mg/L 45.0 mg/L 2/Month Grab Effluent Total Suspended Residue 30.0 mg/L , / -------:-45.0 mg/L /Month Grab Effluent NH3 asN (April 1 — October 31) 22.0 m /L 35m0/L /Month Grab Effluent NH3 as N (November 1 — March 31) _— 2/Month Grab Effluent Fecal Coliform (geometric mean) 200 / 100 ml 400 / 100 ml 2/Month Grab Effluent Total Residual Chlorines 28Ng/L Weekly Grab Effluent Temperature (2C) Weekly Grab Effluent pH2 2/Month Grab Effluent Footnotes: 1. Monitoring and limits apply only if chlorine is used for disinfection. 2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. There shall be no discharge of floating solids or visible foam in other than trace amounts. Zi igriksitittr thnxrn? 1921 Vance Street • PO Box 2157 • Reidsville, NC 27320 • 336-349-4331 PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 NOTIFICATION OF INTENT TO ISSUE A NPDES WASTE WATER PERMIT On the basis of thorough staff review and application of NC General Statute 143.21, Public law 92-500 and other lawful standards and regulations, the North Carolina Environmental Management Commission proposes to issue a National Pollutant Discharge Elimination System (NPDES) waste water discharge permit to the person(s) listed below effective 45 days from the publish date of this notice. Written comments regarding the proposed permit will be accepted until 30 days after the publish date of this notice. All comments received prior to that date are considered in the final determinations regarding the proposed permit The Director of the NC Division of Water Quality may decide to hold a public meeting for the proposed permit should the Division receive.a significant degree of public interest. Copies of the draft permit and other supporting information on file used to determine conditions present in the draft permit are available upon request and payment, of the costs of reproduction. Mail comments and/or requests for information to the NC Division of Water Quality at the above address or call Ms. Christie Jackson at (919)733-5083, extension 538. Please include the NPDES permit number (attached) in any communication. Interested persons may also visit the Division of Water Quality at 512 N. Salisbury Street, Raleigh, NC 27604-1148 between the hours of 8:00 a.m. and 5:00 p.m. to review information an file. • NPDES Permit Number NC0078271, N.C. State State University (Betsy Jeff -Penn 4-H Educational Center) 804 Cedar Lane, Reidsville, NC 27320 has applied for a permit renewal for a facility located in Rockingham Count discharging treated waste water into Carroll Creek in the Roanoke ,River Basin. Currently ammonia nitrogen and total residual chlorine Affidavit of Publication v v North Carolina Uv�� Rockingham County are water quality limited. This . discharge mayaffectfuture)re the undersigned, a Notary Public of Said County and allocations in this portion of the receiving stream. ✓ commissioned, qualified, and authorized by law to admin- NPDES Permit Number personally appeared David Clevenger, who being Joseph P. Dayle�, p y pp g first (Jose's Restaurant WWTP), • 185 Jose Drive, Stoneville, orn, deposes and says. That he is an official of Media NC permit 270renen hasewal apforpliedafacilifor tya F Reidsville, Inc. engaged in the publication of a newspaper located in Rockingham • County discharged treated The Reidsville Review, published, issued and entered as sec - waste water into an unnamed tributaryto Buffalo Creek in nail in the City of Reidsville, in said County and State; that the Roanoke River Basin. Currently total residual prized to make this affidavit and sworn statement, that the chlorine are water quality limited. This discharge may )ther legal advertisement, a true copy of which is attached affect future allocations in this portion of the receiving I.S published in The Reidsville Review on the following stream. February 17, ?pp?. . \ - -,b..).-3- k ek—is- • krIacxy. and that the said newspaper in which such notice, paper document, or legal advertisement was published, at the time of each and every such publication, a newspaper meeting all the requirements and qualifica- tions of Section I-597 of the General Statutes of North Carolina and was qualified newspaper within the meaning of Section I-597 of the General Statutes of North Carolina. Sworn to and subscribed before me, this day of L. Alo 7- t. (Affiant) `z,,.,,,,,.,., Eli may•, . •�'4 i a� O ° Notary Iubic O to 0��v qC J My Commission Expires on 08/30/0 e,,,:" co t..,,` t') NIME 111. ff 3101 IMP Bets - •' enn 4-H Educational Center 804 Cedar Lane • Reidsville, N.C. 27320 • (336) 349-9445 • FAX (336) 634-0110 February 21, 2002 Mr. Charles Weaver Jr. N.C. Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 Dear Mr Weaver, As specified in the draft permit for permit NC0078271, I am submitting some changes that did not get recorded on the initial re -permitting application. Please note that we no longer use the chlorine disinfection with contact chamber and dechlorination unit. Our disinfection system is now a UV light structure, completed in 1999 with excellent results. Thank you for keeping us informed during this process. Sincerely, Jeffery A. North Center Director Cooperative Extension Service, North Carolina State University, College of Agriculture and Life Sciences Permit NC0078271 SUPPLEMENT TO PERMIT COVER SHEET North Carolina State University is hereby authorized to: 1. Continue to operate an existing 0.0084 MGD wastewater treatment facility with the following components: • Septic tank • Dosing tank • Recirculating sandfilter • etthmiu -..discontact chamber UV • 0 - s orination This facility is located off NCSR 1993 northwest of Reidsville at the Betsy Jeff -Penn 4H Educational Center WWTP in Rockingham County. 2. Discharge from said treatment works at the location specified on the attached map into Carroll Creek, classified C waters in the Roanoke River Basin. NC STATE UNIVERSITY North Carolina State University is a land- grant university and a constituent institution of The University of North Carolina Office of Finance and Business Business Division An Equal Opportunity/Affirmative Action Employer http://www2.ncsu.edu/ncsu/ehs/ September 28, 2001 Mrs. Valery Stephens NCDENR / Division of Water Quality / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 Re: Permit Renewal NPDES Permit NC0078271 4H Education Center WWTP, Rockingham County Environmental Health Campus Box 8007 Raleigh, North Carolina Director Environmental Affairs Industrial Hygiene Health and Safety Dear Mrs. Stephens This is to request renewal of the subject NPDES permit. The permit renewal application for the subject NPDES permit is enclosed. Included are: • A description of the originally permitted system and changes to the facility. • A completed NPDES Permit Application — Short Form D. The facility does not generate solids or sludge. The septic tank is pumped by Billingsly Septic Tanks, Reidsville. The University has been actively evaluating options for upgrading or replacing the existing WWTP at the camp. Moretz Engineering has been engaged by the University to prepare an NPDES permit modification for this facility. They are currently working on the Engineering Alternatives Analysis. The complete application for permit modification is expected to be complete in February 2002. If there are any questions on this material, please let me know. Sincerely, Difane A. Knudson Environmental Affairs Manager Enclosures co r• tS t 4 dk,� Z. c c� � L.e cc: Larry Hancock Larry Coble, DWQ, Winston-Salem & Safety Center 27695-8007 919.515.4238 919.515.6859 919.515.6860 919.515.6858 919.515.2894 919.515.6307 SYSTEM DESCRIPTION BETSY JEFF-PENN 4-H EDUCATIONAL CENTER NPDES PERMIT No. NC0078271 Currently, the sand filter is dosed from the dosing tank by two alternating siphons. The effluent from the sand filter is then collected and carried by gravity to the recirculation and discharge wet well. It is recirculated once to the sand filter, where it is sprayed on top of the filter bed and then runs back through the sand filter. It discharges once more to the wet well, and the discharge pump sends it to the ultraviolet disinfection system. From there, it flows by gravity to Carroll Creek. The pump station contains two recirculation pumps and one discharge pump, each with a capacity of 25 gpm. The recirculation pumps are controlled by timers that allow the pumps to run at a maximum of two hour intervals four times per day. Each pump recirculates a dose through the sand filter once per two hours. The pumps alternate dosing times, which are adjustable by the operator. The discharge pump is controlled by float level switches and a timer similar to those on the recirculation pumps. A low level float will shut down all three pumps, a high level float will activate an alarm and flashing light on the control panel, and a mid level float will automatically activate the discharge pump when the switch is in the "Automatic" position. The recirculation pumps send the filtered effluent back to the sand filter, where it is sprayed on the filter bed by "rainbird-type" distribution nozzles. There are six nozzles per filter, and they are installed randomly around the filters. They spray the effluent at varying degrees. Gate valves are used to balance the spray distribution, increase flow, or flush out the distribution system lines. The discharge line from the sand filter is a Schedule 40 PVC pipe that drains by gravity to the recirculation and discharge pump pit. A 2-inch diameter Schedule 80 PVC pipe connects the discharge pump to the UV system. A 4-inch diameter Schedule 40 PVC pipe is used to carry the discharge from the UV system to Carroll Creek. Original System and Revisions The original system, designed in 1971, consisted of a septic tank, a dosing tank with two alternating siphons, two sand filter beds, and a chlorination facility. This system is shown in Figure 1. The septic tank has a capacity of 13,128 gallons, and the dosing tank has a capacity of 2918 gallons as shown in Figure 2. The two sand filter beds are identical; they are located side -by -side with a common wall between them. A plan view of one bed is shown in Figure 3. The original sand filter contained 2 feet of fine-grained sand on top of 9 inches of gravel. This filter was a single -pass, pressure dosed filter. The filtered wastewater was distributed to, and collected from, the filter beds by 6-inch Moretz Engineering • i 04 North Dilling. Street, Kings Mountain, N.C. 28086 Fax (704) 739-4265 Business (704) 739-8309 diameter bell and spigot vitrified clay pipes with open joints. The water passed once through the sand filter, then it was discharged to the chlorination facility. After the chlorination treatment, the wastewater was discharged into. Carroll" Creek. The system was modified in 1996 and 1997 during two "phases of improvements. The sand filter was revised in Phase I, as shown in Figure 4. New discharge and collection lines were installed, as well as new layers of sand and gravel. The PVC distribution piping was placed in the center of an 8-inch layer of gravel. The perforated PVC collection piping was placed in the center of a 10-inch layer of gravel. The piping placement is illustrated in Figure 4. The sand was replaced with 18 inches of fine filter sand (effective size 0.35 — 0.5 mm). During Phase II, the system was revised to include recirculation piping and pumps, discharge nozzles, a discharge pump, and an ultraviolet disinfection (UV) system. The existing filter discharge piping was revised. Existing System Currently, the sand filter is dosed from the dosing tank by two alternating siphons. The effluent from the sand filter is then collected and carried by gravity to the recirculation and discharge wet well. It is recirculated once to the sand filter, where it is sprayed on top of the filter bed and then runs back through the sand filter. It discharges once more to the wet well, and the discharge pump sends it to the ultraviolet disinfection system. From there, it flows by gravity to Carroll Creek. The existing system schematic is shown in Figure 5, and the piping plan is shown in Figure 6. The pump station contains two recirculation pumps and one discharge pump, each with a capacity of 25 gpm. The recirculation pumps are controlled by timers that allow the pumps to run at a maximum of two hour intervals four times per day. Each pump recirculates a dose through the sand filter once per two hours. The pumps alternate dosing times, which are adjustable by the operator. The discharge pump is controlled by float level switches and a timer similar to those on the recirculation pumps. A low level float will shut down all three pumps, a high level float will activate an alarm and flashing light on the control panel, and a mid level float will automatically activate the discharge pump when the switch is in the "Automatic" position. The recirculation pumps send the filtered effluent back to the sand filter, where it is sprayed on the filter bed by "rainbird-type" distribution nozzles. There are six nozzles per filter, and they are installed randomly around the filters. They spray the effluent at varying degrees. Gate valves are used to balance the spray distribution, increase flow, or flush out the distribution system lines. Moretz Engineering • 104 North Dilling Street, Kings Mountain, N.C. 28086 Fax (704) 739-4265 Business (704) 739-8309 2 The discharge line from the sand filter is a Schedule 40 PVC pipe that drains by gravity to the recirculation and discharge pump pit. A 2-inch diameter Schedule 80 PVC pipe connects the discharge"pump to the UV system. A 4-inch diameter Schedule 40 PVC pipe is used to carry the discharge from the UV system to Carroll Creek. Existing Permit Description The Betsy Jeff Penn' 4-H Center has an NPDES Permit that allows treated wastewater from the camp to be discharged into Carroll Creek. The current permit, number NC 0078271, allows a maximum discharge of 8400 gallons per day, and has the following limits on the quality of the discharge. Item BOD TSS NH3-N Fecal Coliform Residual Chlorine PH Monthly Average Limits 30 mgll 30 trig/1 22 mg/1 200/100 ml 28 mg/l >6 Daily Maximum Limits 45 mg/I 45 mg/I 45 mg/I 400/100 ml The existing NPDES Permit expires on February 28, 2002. Future Permit Limits A design flow of 12,360 gallons per day was calculated based on the number of visitors to the camp during peak operating times. This flow is based on North Carolina's design requirements of 60 gallons per day per person for campers and staff, and 120 gallons per day per bedroom for houses. A total of 200 campers and staff during the camp's peak season, as well as one 3 bedroom house that uses the treatment system were assumed to calculate this design flow. A permit modification would be required in order to increase the allowable daily discharge. Mr. David Goodrich with NCDENR Division of Water Quality was asked to provide speculative permit limits for the camp based on a maximum daily flow of 15,000 gallons per day. This flow would allow for a future increase in the number of visitors. The monthly average limits for a flow of 15,000 gallons per day are shown below. Item BOD TSS NH3-N Fecal Coliform Residual Chlorine Summer 30 mg/I 30 mg/l 14.4 mg/I 200/100 ml 28 mg/l Winter 30 mg/I 30 mg/I Monitor only 200/100 ml 28 mg/I Moretz Engineering • 104 North Dilling Street, Kings Mountain, N.C. 28086 Fax (704) 739-4265 Business (704) 739-8309 3 These numbers can be multiplied by 1.5 to obtain the daily maximum limits. As indicated by these speculative limits based on the increased flow, the only permit . limits that would change are those for NH3-N. As previously mentioned, the existing permit expires February 28, 2002. It is likely that the NH3-N limits would change if the existing permit is renewed. A request to increase the discharge to Carroll Creek'must be submitted to the Division of Water Quality. Before a permit modification will be issued, an Engineering Alternatives Analysis (EAA) must be prepared and submitted. The purpose of the EAA is to evaluate the economic and environmental feasibility of different disposal alternatives that do not require discharge into surface waters. Primary Treatment System The existing septic tank, which provides the primary treatment, has a capacity of 13,100 gallons; therefore its size is not sufficient for the maximum flow; This tank will need to be replaced with a 15,000 gallon tank which will cost approximately $25,000. Most of the secondary treatment systems considered require a septic tank capable of holding at least one day's flow. This additional cost is noted when necessary in the consideration of the alternatives below. Secondary Treatment Systems Different alternatives have been considered for the camp's secondary treatment system and for the disposal of the treated effluent. The advantages, disadvantages, and probable construction cost ranges are described for each alternative. The ranges are given only for the purpose of comparing alternatives and may vary from actual construction costs. The cost of most systems varies according to the topography, soil properties, and other site characteristics. The five secondary treatment systems considered are to: (1) rehabilitate the . current sand filter in order to meet current standards; (2) install an Advantex Treatment System; (3) install a constructed wetlands system; (4) install a greenhouse treatment system; (5) install a package treatment plant. Moretz Engineering • 104 North Dilling Street, Kings Mountain, N.C. 28086 Fax (704) 739-4265 Business (704) 739-8309 . 4 Chlorination Facility Block wall vo..".) • %). Septic tank / dosing tank gate • 1 I 0 C Incoming sanitary.._... sewer •••••• •• •••••• .• • • • r • ... • ; I ••• I 14' tar and gravel road Retaining wall • " Power pole wl guy wires and • • • overhead lines Not to scale. Locations and sizes are approximate Figure 1: ORIGINAL SYSTEM pyrsTiNG CONDITIONS PRIOR TO PHASE 1 AND PHASE II WORK C IN TCP PLAN SECTION A -A • •- y LOOSE JOINT -NOT SNOUTED EC NOTE 7 EE NOTE • 4-' OARS I!' C. TO C. LW. �Z IN ALL FACES ORAF.T ®� SECTION B- 8 1.4 4' VENT Figure 2: SEPTIC TANK & DOSING TANK EXISTING CONDITIONS PRIOR TO PHASE I AND PHASE II WORK PROVDED BY OWNER INVERT OF INLET TO SEPTIC TANK. SEE NOTE 1 SEE DETAIL 6 I L by-0 STRIBUTION LINES SEE NOTE 2/ 1/4 W 1/2 X • nnZ E9 - - - -#---- - (ter- ,te�=- ° - COLLECTION LINES (OPEN JOINT) ----•d---i'i''-.`W si r SEE NOTE 4 �--4 SEE NOTE 5 - •'�Ir' - U SEE NOTE 6 .. t 2•CONCRETE BLOCK GROUTED ON INSIDE OR EQUAL ASWAPOSIJAgEr ORIGINAL GROUNO SLOPE FLOOR TO DRAIN SEE NOTE 11 PLAN 0I 1/4 W p. 1/2 X A -. One of l r.�0 Un/T� ,Each Fr 14 Pe E;o'X 3o GROUT 1N T GROUT ON SIDES L EV 1/2 X C l t11 8• MINIMUM . ta4il^ 01 • SEE NOTE 7 - •� SAND '. , SOME OR GRAV£1. 1•474• .IKe•e b� ff 0 • s epC2 0 /SEE NOTE 3 SEE NOTE 3 Corr/1an :✓mil/ pg�cJrcn VB TO V2 1 - iilll e o- o 3/4'TO 1 V2' 0 �` CC°/P�%� //$N! �� u q/ ORIGINAL GROUND T - — V4 W NOTES 1 JOINTS FROM THE DISTRIBUTION BOX TO THE DISTRIBUTION LINES ARE TO BE WATER TIGHT. 2 BELL AND SPIBOT,VITRIFIED CLAY,' L. •I DIAMETER. 3 PLUG ENDS OF DISTRIBUTION LINES 13 COLLECTION LINES. 4 OPEN JOINT WITH GROUT A7 TOP AND =LOWER EDGES OF EACH JOINT TO MAINTAIN ALIGNMENT. (SEE SECTION A- Al 5 OPEN JOINT BELL AND SPIGOT. VITR FI CLAY PIPE COLLECTION LINES CONSTRUCTED Op A 1 % GRADE.' DIAMETER 8 CONCRETE PAO CONSTRUCTED LEVEL TO MAINTAIN ALIGNMENT. 7 USE ONLY PROPERLY SIZED FILTER SANG OF A KNOWN OUALITY,FROM A REPUTABLE SOURCE. TEST SAMPLES SHOULD BE SUBMITTED TO THE STATE BOARD OF HEALTH FOR ANALYSIS BEFORE SNI►WENT AND BEFORE PLACING IN THE SAND FILTER BED. THE SAND SHALL MEET THE FOLLOW- ING REOUIREMENTS: EFFECTIVE SIZE 0.35-0.5oassn. UNIFORMITY COEFFICIENT LESS THAN 3.0 DUST CONTENT 1/2 OF I%(0.5%) MAX. 8 OUTLETS SHALL BE AT LEAST 2"LOWER THAN THE INLET. 8 CONSTRUCTION MATERIAL FOR THE DISTRIBUTION BOX COVER SHOULD BE A THIN METAL SKEET, METAL GRATING, OR SECTIONS OF CONCRETE THAT WEIGH LESS THAN 1S0 LBS. • 10 THE DIMENSIONS GIVEN ARE TO SERVE AS DESIGN GUIDESAND ARE NOT INTENDED TO LIMIT THE IMAGINATION OF THE OWNER OR HIS ENGINEER. 11 THIS OUTLET SHALL BE' AT LEAST 4'.8• LOWER THAN THE INLET AT THE DISTRIBUTION -BOX. c‘l 3 Figure 3: ORGINAL SAND FILTER BED ONE OF TWO UNITS WITH COMMON WALL BETWEEN EACH FILTER PROVDED BY OWNER 6' MINIMUM 8Lope DRAWING NO PS 63-8 SAND FILTER BED TYPE -A SUGGESTED FOR )474-'. If:f7' P ,.,t! 4 -H DAMP ADDRESS Rec,Evn9Aarr ('[4in/1i POPULATION 22-5� DESIGNED BY rr?LsG DATE 2/4/7/ JAS DISTRIBUTION BOX DETAIL SECTION A- A SANITARY ENGINEERING DIVISION N G STATE BOARD OF HEALTH ORANING NOT TO SCALE AUGUST saes rBon1etsy-Jeff F, '•-•.. ,anitary Facilities (t:xistiing) j Septic Tank (Existing) NOTE. Replace distribution and collection piping, sand, and gravel in filters. 1 __To Sand Filter 2 ! To distribution box Phase II•work will include recirculation and Filter 1 piping and pumps, and new discharge point. ; f s:Z �' � �',• ��:11t•;:1sC;mot . tie �d Ot{t�o i; Fifer•1of2—' . h= t.:3,�;.1:t •r.- r : A:31r:.:►n3.� Replace collection piping with perforated PVC '-••:,,,��_ Grout wall penetration Nevi solid 4" piping to -- • ---_ _ chlorinator. Slope continuously end connect to existing chlorinator. MolP.1 Replace sand and gravel as follows. Collection piping is buried in center of 10" of 3f4' to 2-112" clean gravel. Sand is 18" of 0.35.0.5mm effective size < 5.0 uniformity coefficient <0.5 % dust content Distribution piping Is burled in center of 8" of 3/4" to 2. 12" clean gravel Collection piping is 5 runs, uniformly spaced, wilh 1/2 space between wail and pipe Distribution piping is placed halfway between Collection piping as shown <' — See Note 1 - Impervious soil - do not disturb Ir New 4".filtrate line is routed to existing chlorination facility with wyes and plugs for future extension. Figure 4: SAND FILTER AS REVISED IN PHASE PROVDED BY OWNER 0 Baby -Jeff Penn 5anitary Facilities (Existing) Ralnblyd" style ~ sprinklers • \ per filter Filter • 01 of 2 NeW 4" piping to pump station (Existing) f Scope line towards pump station To filter distribution boxes and filters Recirculation Recirculation pump (2) Figure 5: EXISTING SYSTEM SCHEMATIC AS REVISED IN PHASE it To UV disinfection system and dlscbarge Discharge pump 0 10 20 CARROLL CREEK 4" PVC discharge plping N Junction box for future pump station UV equipment and\ pump control Panel 1....,i UV Disinfection equipment pad Distribution and recirculation pump station u L Re -directed filter effluent 4" PVC Distribution piping Z" PVC - See distribution noule details Incoming sanitary sewer. Contractor may •. temporally plug at manhole Igor up to 4 hours with approval of Camp Manager _ \,V NOTE: Distribution piping to be buried minimum Z4"and must be provided with positive slops pump station. Provide shutoff valve i" above grade at each riser (4 required). Field locate piping with approval of Engineer. DISTRIBUTION NOZZLE lTOTAL -SEE . DRAWINGS 9J►OO�AND BJPO// Typical river and valve location Not to scale. Locations and sly are a roxl:nate j0 20 .... rir..ne=fl I14.1 PHASE II