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HomeMy WebLinkAboutSW8030101_COMPLIANCE_20060308STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD �A r Michael F. Easley, Governor a� R Q William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources \O� fib Alan W. Klimek, P. E. Director > Division of Water Quality .� Coleen H. Sullins, Deputy Director Division of Water Quality March 8, 2006 Mr. Michael McGuire, Vice President Home Depot U.S.A, Inc., Real Estate Law 2455 Paces Ferry Road Atlanta, GA 30339 NOTICE OF INSPECTION: Home Depot in Jacksonville Stormwater Project No. SW8 030101 Onslow County Dear Mr. McGuire: Please find attached a copy of the completed form entitled "Stormwater Compliance Inspection Report". The report summarizes the findings of a recent inspection of the project's stormwater controls conducted on March 8, 2006 to determine compliance with Stormwater Permit Number SW8 030101 issued on July 15, 2003. A summary of the findings and comments are noted under Section 4 of the report. Please inform this Office in writing before April 8, 2006 of the specific actions that will be undertaken and the time frame required to correct the deficiencies. Failure to provide the requested information, when required, may initiate enforcement action. If you have any questions please contact me at the Wilmington Regional Office, telephone number (910) 796-7397. Sincerely, Lq • ii... Gary 11ekher Environmental Technician EBlghb: S:IWQSISTORMWATIINSPECT1030101.Mar06 cc: Larry Diehl (Greenberg Farrow Engineering) Shelton Sullivan (DWQ Assistance & Compliance) Brandon Westin (City of Jacksonville Inspections) Larry Stalvey (Home Depot) Gary Beecher (DWQ) N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 796-7215 Customer Service Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1-877-623-6748 N COENR Rome Depot in Jacksonville SW 030101 March 8, 2006 STORMWATER COMPLIANCE INSPECTION REPORT 1 2 0 4. Project Name: Home Depot in Jacksonville Project Number: 030101 Control Measure: Wet Pond Water Body: Sandy BranchlWhite Oak Classification: "SC NSW" Directions to site: Western Blvd. In Jacksonville Inspection Date: Weather Conditions: March 8, 2006 Compliance Issues: Warm & Dry (60's) (a) The Stormwater pond in general looks much better and appears to be functioning correctly. (b) The outlet structure has been repaired. It looks good and appears to be functioning correctly. (c) The pond slopes have been covered with seed and matting. It's too early to tell if the amount of seed & matting will produce adequate grass coverage of the slopes. Another compliance inspection will be performed in late spring to check on the pond slopes and to insure the pond is still functioning correctly. Required Actions: (Explain each deficiency and what needs to be done to bring the system back into compliance) (a) The stormwater pond must be maintained on a routine basis. The outlet structure must be periodically inspected to insure that it is functioning correctly. (b) When the grass begins to grow it must be routinely mowed. Any bare or eroding spots on the pond slopes must be filled with dirt and stabilized with either sod or sown grass. The back -side of the pond slopes should also be stabilized with sown grass or sod. ( this is the side closest to the outlet structure) 2 r� • OF W A rE 0 Y Michael F. Easley, Governor William G. RossJr., Secretary North Carolina Department of Environment and Natural Resources February 15, 2006 Mr. Michael McGuire, Vice President Home Depot U.S.A, Inc., Real Estate Law 2455 Paces Ferry Road Atlanta, GA 30339 NOTICE OF INSPECTION: Home Depot in Jacksonville Stormwater Project No. SW8 030101 Onslow County Dear Mr. McGuire: Alan W. Klimek, P. E. Director Division of Water Quality Coleen N. Sullins, Deputy Director Division of Water Quality Please find attached a copy of the completed form entitled "Stormwater Compliance Inspection Report". The report summarizes the findings of a recent inspection of the project's stormwater controls conducted on February 13, 2006 to determine -compliance with Stormwater Permit Number SW8 030101 issued on July 15, 2003. A summary of the findings and comments are noted under Section 4 of the report. Please inform this Office in writing before March 15, 2006 of the specific actions that will be undertaken and the time frame required to correct the deficiencies. Failure to provide the requested information, when required, may initiate enforcement action. If you have any questions please contact me at the Wilmington Regional Office, telephone number (910) 796-7397. Sincerely, L W. 1,1, Gary B ec er Environmental Technician EB/ghb: S:IWQSISTORMWATIINSPECT1030101 cc: Larry Diehl (Greenberg Farrow Engineering) Shelton Sullivan (DWQ Assistance & Compliance) Brandon Westin (City of Jacksonville Inspections) Larry Stalvey (Home Depot) Wilmington Regional Office 7RT%� N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 796-7215 Customer Service Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1-877-623-6748 1iK_D[N; fi Home Depot in Jacksonville SW 030101 February 15, 2006 • STORMWATER COMPLIANCE INSPECTION REPORT 1. Project Name: Home Depot in Jacksonville Project Number: 030101 Control Measure: Wet Pond Water Body: Sandy BranchlWhite Oak Classification: "SC NSW" Directions to site: Western Blvd, In Jacksonville 2. Inspection Date: February 13, 2006 Weather Conditions: Cool & Dry (50's) 3. Compliance Issues: (a) The Stormwater pond is starting to look much Fetter. The outlet structure appears to have been repaired and appears to be functioning correctly. (b) The slopes and area around the pond still require more grass coverage. Without adequate grass coverage the sides of the pond slopes will erode and sediment will end up inside the pond. 4. Required Actions: (Explain each deficiency and what needs to be done to bring the system back into compliance) (a) More grass must be added to the pond slopes and to the disturbed area surrounding the pond. The grass can be either sod or a mixture of sown grass with mulch. Hydro -seed can also be used on the pond slopes. Inspector: Gary Beecher Water Quality/Wilmington Regional Office: (910) 796-7397 EBlghb: S:IWQSISTORMWATIINSPECT1030101.Feb06 2 .� of W A 7" '4 0 `C Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources April 27, 2004 Mr. Michael T. McGuire, Vice President Home Depot U.S.A., Inc., Real Estate Law 2455 Paces Ferry Road Atlanta, GA 30339 NOTICE OF INSPECTION: Home Depot @ Jacksonville Stormwater Project No. SW8 030101 Onslow County Dear Mr. McGuire: Alan W. Klimek, P.E.,Director Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality Please find attached a copy of the completed form entitled "Stormwater Compliance Inspection Report". The report summarizes the findings of a recent inspection of the project's stormwater controls conducted on April 16, 2004 to determine compliance with Stormwater Permit Number SW8 030101 issued on July 15, 2003. A summary of the findings and comments are noted under Section 4 of the report. Please inform this Office in writing before May 27, 2004, of the specific actions that will be undertaken and the time frame required to correct the deficiencies. Failure to provide the requested information, when required, may initiate enforcement action. If you have any questions please contact me at the Wilmington Regional Office, telephone number (910) 395-3900. Sincerely, 4-1, �-, 3 ..a, Gary Beecher Environmental Technician RSS/ghb: S:IWQSISTORMWATIINSPECT1030101 cc: Wilmington Regional Office Gary Beecher N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 A VAT NCDENR ,M STORMWATER COMPLIANCE INSPECTION REPORT Project Name: Home Depot @ Jacksonville Project Number: 030101 Control Measure: Wet Pond Water Body: Sandy Branch/ White Oak Classification: "SC NSW" Directions to site 2. Inspection Date Weather Conditions 3. Compliance Issues: Western Blvd, Jacksonville April 16, 2004 Warm and Dry (60's) Y N ❑ ❑ The drainage area (including offsite) and built -upon area to the permitted system are per the approved plan. No unpermitted offsite drainage enters the system. ❑ ❑ All the built -upon area associated with the project is graded such that the runoff drains to the system. ❑ ❑ For ponds/infiltration, the outlet/bypass structure relative elevations are per the approved plan. (Must be verified via as -built survey if in question). X ❑ The inlets and outlet structure are located per the approved plans and do not cause short-circuiting. ❑ A trash rack is provided over the outlet weir and orifice. ❑ X All slopes are grassed with permanent vegetation and are not eroding. ❑ ❑ Vegetated slopes are no steeper than 3:1. ❑ ❑ The approximate amount of permitted surface area has been provided. (Must be verified via as -built survey or designer's certification.) ❑ ❑ Required drawdown devices are correctly sized per the approved plans. All required design depths are provided. ❑ ❑ All required parts of the system are provided, such as a vegetated shelf, and a forebay. ❑ ® The designer's certification has been submitted. ❑ ❑ The required deed restrictions are correctly recorded and submitted. ❑ ❑ The number of lots or outparcels is per the permitted amount. ❑ ❑ The built -upon area on the lots or outparcels does not appear to exceed the maximum amount (must be verified via as -built survey if in question) ❑ ❑ Curb outlet swales are constructed, located properly, are 100' long and have dense vegetated cover. ❑ ❑ The road, cul-de-sac, parking lot and sidewalk widths are per the approved plan. ❑ ® Required maintenance is being performed. ❑ ❑ Outparcels have their own offsite permit. ❑ ❑ For low density projects, roadside swales are 3:1, vegetated and stable. ❑ ❑ For low density projects, there are no unpermitted pipes on the project. i 4. Required Actions: (Explain each deficiency and what needs to be done to bring the system back into compliance) (a) There are several bare spots along the pond slopes. These need to be seeded with grass or covered with sod. (b) The outlet structure needs to have screens or grates placed over the openings on its sides. Trash can enter these openings and disrupt the outlet system. (c) Please send us a copy of the designers certificate for the pond. Thank You (d) A large amount of sediment has entered the fore bay via the inlets and field end sections. Please make sure that the accumulated sediment is not blocking stormwater flow into the fore bay and pond. The sediment may need to be removed. Inspector: Gary Beecher Water Quality/Wilmington Regional Office/(910) 395-3900 Ext 222 RSS/ghb: S:IWQSISTORMWATIINSPECT1030101.Apr04 ^' DRY DETENTION BASIN ANALYSIS (3:\OATA\VVPDATAY@/Q8\PONO\030101.VVK1 PROJECT NAME, Home Depot, Jacksonville RENEWER: LLewis DATE'. 10'Jun'03 Receiving Stream: Sandy Run Branch Class: SC NSW Drainage Basin: White Oak Index No. VVOK8218'10~1 Site Area 13.19 acres Drainage Area IMPERVIOUS AREAS Rational Buildings 126512.00 square feet 1.00 Parking 287720.00 square feet 1.00 square feet Outparoe|B 211048.00 square feet square feet square feet OWS %|MFERV|OUO 08.44% Rational? Put a "Il " in this box if the Rational Method is used. VOLUME CALCULATION I inches Design Storm ORIFICE CALCULATION No. of Orifices No. of Orifices k in Orifice Area 7.07 sq. in. Orifice Area 0.00 sq. in. days COMMENTS �r Kevised 6/26/03 17, Home Depot Jacksonville, NC Permanent Water Quality Pool Design Basis Drainage Basin - 16.22 ac. — 88.5% Impervious Pool Depth -- 3.5 ft. with 3:1 side slopes SAM - Coastal = 6.5 RECEIVED JUL 112003 DWQ PRO, # � � e U 3C)i U I Pool Surface Area for 85% pollutant removal efficiency. Area required = acreage of drainage basin x (6.5/100) x 43,560 = 45,925 sf. Pool Volume Required Minimum Surface Area = 45,925 Bottom Area = 33,060 78,985/2 = 39,492sf x 3.5 ft.=138,224cf Fore Bay_ Volume = 20% of 138,224cf = 27,645 Check WQV Acreage x Rv x 1 "/12 Rv = 0.5 + 0.0091 (I) I = 14.3 ac./16.22 = 0.885 WQV = 16.22 x 0.451 x 0.083 x 43,560 Therefore, Rv — 0.451 WQV = 26,448cf OK < 138,224cf Rate of Infow for 1 inch rainfall — first flush (60 minutes) 138,224cf /3,600 sec. = 38.4 cfs Rate of Ouflow (48 hours) 138,224cf/ (48 hr. x 3,600 sec. Per hour) = 0.84cfs Minimum Sediment Storage (at /z" sediment/acre, 1,81 cf per acre) 16.22 ac x 1,815cf per acre = 29,439cf Pool Weir — 100-year frequency storm (post -development) Q = CIA Q1oo = 0.9 x 6.57 x 16.32 = 96.5cfs Moo = 96.5cfs/(5)(0.53/2) (Width = 5 ft.) (Depth Flow 0.5ft) W1oo= 54.6 If CARpj0,0 4 • SEAL Orifice Size for 48-hour minimum outflow for 1-inch first flush detention volume of 145,119cf . Try 3" PVC Q = KA (32.2) Q = (0.5) 0.0491) (32.2) = 0.79cfs K=0.5 Entrance Loss Coeficient A= area 3" Dia. Orifice g= 32.2 ):\Adrnin\2001 \20010629\20010629 Permanent Water Quality Pool 6_26_03.doc Pa ge 1 of 2 Reviser) 6/26/03 Check outflow tirne 145,1_19cf + 0.79 cfs_= 51 hours 3600 sec/hr ,,�S�rnn+iqquhrrr► ESSI : SEAL �* :fir= 1AAdmin\2001 \20010629\20010629 Permanent Water Quality Pool 6_26_03.110c Pa gc 2 of 2 Caring E Community c �11NB A3Crg � From: Michael Matthews, Engineering Division, Public Utilities Department To: Linda Lewis, Water Quality Section Date: March 31, 2004 Subject: Stone Water Issues at the Home Depot Dear Linda Lewis, On March 16, 2004 1 was investigating some turbidity problems in the creek behind the Home Depot during a rain event. During this investigation I found some issues I thought might be a storm water problem. I don't know if it is a design problem or just an issue of runoff volume, but l felt it was important enough to identify and bring to your attention so you can consider if further action is necessary. Shortly after these pictures were taken I forwarded this information to Larry Diehl of the firm Greenberg Farrow by email. I also followed this up with a phone call a few days later to confirm that he had received the pictures. He was going to make contact with the appropriate personnel concerning this issue. As of this date, I have not received any contact or follow up. I have spoken with Tom Anderson and he has approved this letter to you concerning this matter. Should you require any further information concerning this matter, please feel free to contact Tom Anderson at 938-5262 (Office) of myself at 938-5280 (Office) or 358-5491 (Mobile) Respectfully submitted, Michael Matthews Construction Inspector City of Jacksonville ti w lb its N i4, Jill it -to t , I Is � Aa- I jr red'°'t s� c`� 7b5,4€r .ia� i = i . .!3 ��° i is ". i i �� ,, has Pictures Taken Mar 16 2004 The storm water outfall flared end section from the two catch basins on the Home Depot detention pond is submerged in the receiving ditch. Pictures Taken Mar 16 2004 Receiving ditch flow velocity behind the Home Depot Detention Pond a t '� � o-3•a �' Y @ � I € d ti a � 6 .a [ h _--.��Tt d r tg i �— i �d i€ '� 9 %CP#, f. . 9 p # 9 p-9- d% "�` � �'i�i � e a 1 3 4 d ( � 3 §u� � £� 7 � •%egg �Be�'.er ' ek YiT ib^ g - } 1 Pictures Taken Mar 16 2004 The Home Depot Detention Pond outfall flared end is submerged in the receiving ditch and causing back flow into the Home Depot Pond. Pictures Taken Mar 16 2004 This picture shows some water turbulence where the back flow is occurring in the pond. Pictures Taken Mar 16 2004 Sediment coming from the storm water system for Home Depot. Pictures Taken Mar 16 2004 Sediment coming from the storm water system for Home Depot. Pictures Taken Mar 16 2004 Sediment coming from the storm water system for Home Depot. I I ' GREENBERG FARROW ARCHITECTURE ENGINEERING DEVELOPMENT 1755 The Exchange, Atlanta, Georgia 30339 tel 770,303.1033 • fax 770.303.2333 www.gfeenbergfarrow. com NEW YORK, New York ' CHICAGD.Illinois DALLAS, Texas SOMERVILLE, New Jersey ' LOS ANGELES, California SAN FRANCISCO, California 1 1 1 0 1 Dear Sirs: Apri 1 11, 2003 Department of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, N.C. RE: Revised Stormwater Management Calculations Home Depot — Jacksonville, NC Included are two copies each of the revised Hydraulic Calculations for the Storm Water collection system, sedimentation erosion control calculations for the enhanced Grass Swale and extended Dry Detention Basin designed to reduce the total suspended solids (TSS) by eighty five percent. All comments included in your letter, dated March 17, 2003, have been addressed. The Pre and Post -developed drainage maps, the Grading and Drainage Plan, the Erosion Control Plan and the Landscape Plans are included for reference. Please review the above and give your approval and/or comments to us. Sincerely, GREENBERG FARROW ARCHITECTURE INC. Esmai Ghadrdan, P.E. RE C'I V ED APR 14 2003 DWQ PROM # ���() lot 01 Lelrer 03.22.001:\Admit)\20N)1\2(N)l )(,19\LETEEK. I)ep).Of Emiron. And Natural Resources -Calculations 04-1I-M.Doc I 1 ti C �� C•1� A �y 4 d.��Y •aa. ,� i' .'ty' r f ti �s X3'.. �� E.� 1• 1- iis�rf 1 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 HYDRAULIC/HYDROLOGY STUDY FOR: THE HOME DEPOT JACKSONVILLE, N.C. LOCATED - WESTERN BLVD. & U.S. HWY. 17 GFA PROJECT NO. 20010629 PREPARED BY: V, r- GREENBERG FARROW ARCHITECTURE ENGINEERING DEVELOPMENT 1755 The Exchange, Allanla, Georgia 30339 lel 770.303.1033 • fax 770.303.2333 www.greenbergfarrow.com NEW yORK. New yolk CHICAGO. Ihimis DALLAS, Texas SOMERSET, New Jersey LOS ANGELES, Calllomia BOSTON, Massachus%% DATE PREPARED: 12.18.02 (REVISED 02.05.03) (REVISED 04.07.03) 11 1 1 e The Hydraulic design is based on the Ten -Year Storm for the location, 1 using the Rational Method. The Haestad Methods, Inc. Storm Cad v1.5 (158) program was used on the computations. 1 The Erosion sedimentation control plan is designed per the North Carolina Erosion and Sediment Control Planning and Design Manual, 1 as is the Water Quality Design. The Water Quality Design uses a combined enhanced Grass Swale 1 and extended Dry Detention Pond. A sand filter under drain system of thirteen hundred square feet is also incorporated to further protect ' the effluent control structure from being plugged by floating debris or sediment. 1 The combined system is estimated to reduce total suspended solids by eight -five percent. 1 1 1 1 1 1 1 HYDROLOGY CALCULATIONS Jacksonville, N.C. Project No. 20010629 December 18, 2002 Pre -developed Q100 Q = C I A Time of Concentration (See Figure 3-1) Tc = 21 minutes C= (0.3) (3.62 AC _ 16.22) = 0.067 C = (0.9) 12.6 AC _ 16.22) =0.777 16.22AC 0.844 = Balanced "C" Intensity for 21 minutes = 6.12 Drainage Basin = 16.22 acres Q1 oo = (0.844) (6.12) (16.22) Q100 = 84 cfs Post-develoi2ed Q100 Time of Concentration (See Figure 3-1) Tc = 18.5 minutes C = (0.3) (5.2 = 16.22) = 0.096 C=(0.9) 01.0=- 16.22)=0.610 16.2 0.706 = Balanced "C" Intensity for 18.5 minutes = 6.6 Drainage Basin = 16.22 acres Q1oo = (0.706) (6.6) (16.22) Q2 = (0.706) (3.0) (16.22) Q100 = 76 cfs Q2 = 35 cfs Grass Swale - Q= A 1.486 R213 S112 n Q = (28) (42.457) (1.4)213 (0.0548) Q = 81 cfs (OK) V = 1.486 R213 S112 n V = (42.457) (1 A)213 (0,0548) V = 2.9 fps (OK) Length = 340 LF Stone check dams one foot high to be constructed at eighty five foot intervals. Control Structure — Orifice size to drain the one inch first flush — one hour rainfall (Detain 2.8 Days -- 67 Hours) Volume: (1'712") (43,560 sq. ft.) 16.22 AC = 58,879 CF Ure = 58,880 CIF 58,880 CIF - 4 days = 14,720 CF/day 14,720 CF/day _ 96Hrs = 153.3 CF/Hr. 14,720 CF/day = (1440 x 60) = 0.17 cfs Water depth above orifice invert 1 foot H = 1 Try 3" Orifice (area = rr (1.5/12)2 = 0.049) Q = CA (2) 32.2 x H C=0.6 Q = (0.6) (0.049) 64.4 (1) Q=0.24cfs 4/7/03 Home Depot Jacksonville, NC Enhanced Grassed Swale 35%n TSS Removal Extended Dry Detention Basin 50% TSS Removal 85% TSS Removal Design Basis Drainage Basin - 16.22 ac. — 68% Impervious Pool Depth — 4.0 ft. with 3:1 side slopes SA/SD - Coastal = 7.9 Pool Surface Area for 50% pollutant removal efficiency. Area required = 16.22 acre of drainage basin x (7.9/100) x 43,560 = 55,817 sf. Pool Volume Surface Area = 44,000 sf. (actual) Bottom Area = 39,780 sf. _ (59,000 cf) Rate of Infow for 1 inch rainfall — first flush (60 minutes) (43,560) 06.22ac) 0/12) /3,600 sec. = 16.3 cfs Rate of Ouflow (67 hours) 58,880cf/ (67 hr. x 3,600 sec. per hour) = 0.24cfs Minimum Sediment Storage 20% of 58,880 cf = 11,776 cf Pool Weir — 100-year frequency storm (post -development) Q = CIA Q1oo = 0.706 x 6.6 x 16.22 = 76cfs Wloo = 76cfs/(5)(0.5312) Wloo= 45 If Length of Weir — 5' Width of Weir — 45' Orifice Size Q= ca x (square root of 2 gh) = 32.2 (Where c = 0.6, 2 = 0.049, g = 32.2, and h = 1') Use 4-inch pipe x 1000 linear feet perforated PVC geotextile wrapped in gravel bed. 1AAdmin\2001 \20010029\20010629 Permanent Water Quality Pool IV 04 07_20o3.doc Pa ge 1 of 1 0 n v 00 a 0 V O O N W J LL LL 0 47 0 0. D LLI U V w o p` U O � ..... i, i X/ i N O O� U� Z � L,J LLJ OQ �V) w c) a� Q W o �c v Z j O a O — Li a aa� L® z O(Z)$t�� 0 w In k�0� I F O o0 O 00 N m 0 UO W Q O � W J V W W L = O Ij WV Ix ct ;r ct OQ II N •� a m = 0 �a z b 3 �a 1w 0 � � N V � U NaQt: IIOtiN0.�NN� g n II n u II n u Ov�cz33NcQ: to �d O� O n �N U� to O'er y p II II U II II �� II 4 000 33 �cl The Home Depot ' Western Boulevard Q U. S. Hwy. 17 Jacksonville, North Carolina ' Permanent Water Quality Pool Operation and Maintenance Agreement ' DWQ Project — Onslow County North Carolina Division of Water Quality 1 A Permanent Water Quality Pool is included on the property for the purpose of protecting the water quality of the receiving creek during construction and permanently following completion of ' construction. The pool is included on plans prepared by Greenberg Farrow Architecture and dated November 15, 2002. They are identified as C-4.0, C-4.1, and C-4.2 of Greenberg Farrow ' Architecture Project No. 200102629. Following construction, stabilization of surface areas draining to the pool, and acceptance of the twork maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: ' a. Inspect the water quality pool system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. tb. Check and clear the filter bed and orifices of any obstructions such that draw -down of the pool occurs within 2 to 5 days as designed. ' 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as ' needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) ' quarterly to maintain proper function. 4. Remove accumulated sediment from the water quality system semi-annual) or when q Y Y Y depth is reduced to 75% of the original design depth. Removed sediment shall be 1 disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). 1 The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. ' When the permanent pool depth reads 28.3 feet at the water quality Control Structure the sediment shall be removed. 1 I 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. ' 7. All components of the water quality system shall be maintained in good working order. ' I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. I agree to notify the Department of Environment and Natural Resources Division of Water Quality of any problems with the ' system or prior to any changes to the system or responsible party. I acknowledge and agree that included in any purchasers agreement will be provisions for the ' shared maintenance cost of the permanent Water Quality Pool that receives the surface storm drainage from the lot or lots owned. The shared cost of the required maintenance on the Pool shall be based on the area from each site contributing flow to the Pool and dividing it by the total area flowing into the Pool from all sites. The percentage of shared cost is established as ' follows: Shared Cost Water Quality Pool Lot A- 0.829% Lot .B- 0.171 % 1 The shared cost for the required maintenance will be validated by copies of maintenance notifications and invoices for expenses incurred. ' All parties will be notified when a site ownership changes and each site's pro-rata percentage of maintenance cost will be published to the two site owners. The Maintenance Agreement ' has no expiration date, but shall be perpetual. The ,Maintenance Agreement can be voided but only if: parties agree and the off -site g Y: ap b property owner complies with watershed protection requirements by some other means; and the governmental office having jurisdiction for watershed protection approves the new means of watershed protection. Print name: Title: Jeff Israel tor' 2aw "Unwi 5acesLoq Real Estate erzy Rd. Address: Atrinta, GA 30339 - Phone: (770) 433-8211 Signature: ' 1 1 1 1 1 1 1 Date VES Q 5 2003 a Notary Public for the State of County of W-62,1,41- do�/,^hereby certify thatIII� personally appeared before me this day of1-7 acknowledge the due execution of the foregoing water quality basin maintenance requirements. Witness my hand and official seal, SEAL oaV,= County, Georgia. fiotary puiC B. 2003. My commission expires My commission E=xofes Aug. t Recorded: Deed Book: Page Number: � � s a � � ® � � � � ® � a � � � a Amd' -Vill Ic Itz lfii Ji of a PinVI si, F