The URL can be used to link to this page

Home My WebLink About20120187 Ver 1_More Info Received_20131030Strickland, Bev From: Lucas, Annette Sent: Tuesday, November 05, 2013 8:35 AM To: Strickland, Bev Subject: FW: Caldwell Station - Contech Treatment & Detention System North & South Operation Attachments: Caldwell Station Contech Treatment North Operation.pdf; Caldwell Station Contech Treatment South Operation.pdf I •- - From: David Odom [ mai Ito: davidodom Ca)odomenaineerina.com] Sent: Wednesday, October 30, 2013 1:58 PM To: Lucas, Annette Cc: Scott Roach Subject: FW: Caldwell Station - Contech Treatment & Detention System North & South Operation Annette Here are the executed and notarized Operation and Maintenance Agreements for Caldwell Station. You will receive the sealed drawings shortly. Dave From: Ginger Noland [mailto:GNolandCa)davidd[ye.com] Sent: Wednesday, October 30, 2013 1:54 PM To: davidodomCa)odomenaineerina.com Cc: Eddie Littlefield; Joe Mullins Subject: Caldwell Station - Contech Treatment & Detention System North & South Operation Hey David! Attached please find the executed Contech Treatment and Detention System North & South Operation and Maintenance Agreements. Thanks! Ginger Noland Executive Assistant to John "Eddie" Littlefield, President /CEO David Drye Company 175 Davidson Highway Concord, NC 28027 704 - 886 -2005 phone 704 - 886 -3020 fax gnoland @daviddrye.com Contech Treatment and Detention System North Operation and Maintenance Agreement I will keep a maintenance record on this system. This maintenance record will be kept in a log in a known set location. Any deficient system elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and efficiency of the collection system. The StormFilter system is defined as the proposed underground filter designed by Contech, The Water Quality Storage is defined as the underground system which stores the i inch rainfall event. Important inspection and maintenance procedures: Remove and properly dispose of sediment and floating debris accumulated in drain inlet, outlet pipes and detention chambers. Sediment should be removed from detention chambers when it exceeds 10% of the storage area, approximately 0.3 feet deep. Use catch basin cleaning equipment including vacuum pzunps. - Proper disposal of sediment is required. It is least expensive if a nearby site has been set aside for sediment. This area must be located outside of floodplain. Persons responsible for disposing of sediment shall determine if disposal site accepts wet sediment. The material may need to be dewatered before disposal. After the StormFilter system is installed, I. will inspect it monthly and within 24 hours after every storm event greater than 1.0 inches. Annual inspections must be performed by a qualified individual (PE, ASLA, or PLS) with the proper training. Records of inspection and maintenance will be kept in a known, set location and will be available upon request. Refer to the attached procedures prepared by Contech for additional information. After the underground water quality storage system is installed, I will inspect it quarterly and within 24 hours after every storm event greater than 1.0 incites. Records of inspection and maintenance will be kept in a known, set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. P The entire BMP systein Trash/debris is present Remove the trash/debris The pipes entering and Unclog the pipe. Dispose leaving the splitter box are of the sediment off -site clogged The pipe is cracked or otherwise damaged Replace the pipe The splitter box Sediment has accumulated Remove the sediment and to a depth greater than one- dispose of it in a location half the original design where it will not cause depth of the provided sump impacts to streams or the BMP Remove the sediment and Sediment has accumulated dispose of it in a location to 10% of storage area where it will not cause (approx. 0.3 feet deep) impacts to streams or the BMP Structural damage has Repair or replace the vault The underground storage occurred to the vault, access and/or mechanical pipes hatch, access ladders, components as necessary and/or weirs Clear vents from all Blocked, damaged, or blockages and make plugged air vents structural repairs/replacements as necessary Clean out the outlet device. Clogging has occurred Dispose of the sediment off- site The outlet device is Repair or replace the outlet The outlet device darns ged device Contact the City of Erosion or other signs of Huntersville Public Works damage have occurred in Department at the outlet 704-920-4200 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name :Caldwell Station BMP drainage area number:North Sy tern__ Print name: z 'V bo E, Title: X e-c - r`v'� Y�vn r4 ,-e r Address:--I"7 - 1]dyirAsvr) 141`!�'h Way..COOr1. IC -)-?O t7 �j 11 Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. q e t- 5. iy Q � � , a Notary Public for the State of Ij NC , County of C a 6arrLts , do hereby certify that E. L� Ie-F' F'< 1r�Q _ _ personally appeared before me this F3oday of - -___, ak.n E, TOcAvb -er , Ro13 , and acknowledge the due execution of the forgoing sand filter maintenance requirements. Witness my hand and official seal, _ S. IVO r o` �a��rrra�as �atttiN ► ° ° °° SEAL My commission expires a 3 )I 7 Form SW401 -Sand Filter 0 &M -Rev.4 2009Sept17 page 3 of 3 Contech Treatment and Detention System South Operation and Maintenance Agreement I will peep a maintenance record on this system. This maintenance record will be kept in. a log in a known set location. Any deficient system elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and efficiency of the collection. system. The StormFilter system is defined as the proposed underground filter designed by Contech. The Water Quality Storage is defined as the underground system which stores the 1 inch rainfall event. Important inspection and maintenance procedures: - Remove and properly dispose of sediment and floating debris accumulated in drain inlet, outlet pipes and detention chambers. Sediment should be removed from detention chambers when it exceeds 10% of the storage area, approximately 0.3 feet deep. Use catch basin cleaning equipment including vacuum plumps. - Proper disposal of sediment is required. It is least expensive if a nearby site has been set aside for sediment. This area must be located outside of floodplain. Persons responsible for disposing; of sediment shall determine if disposal site accepts wet sediment. The material may need to be dewatered before disposal. After the StormFilter system is installed, I will inspect it monthly and within 24 hours after every storm event greater than 1.0 inches. Annual inspections must be performed by a qualified individual (PE, ASLA, or PLS) with the proper training. Records of inspection and maintenance will be kept in a known, set location and will be available upon request. Refer to the attached procedures prepared by Contech for additional information. After the underground water quality storage system is installed, I will inspect it quarterly and within 24 hours after every storm event greater than 1.0 inches. Records of inspection and maintenance will be kept in a known, set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. The entire BMP system Trash/debris is present Remove the trash/debris The pipes entering and Unclog the pipe. Dispose leaving the splitter box are of the sediment off -site clogged The pipe is cracked or otherwise damaged Replace the pipe The splitter box Sediment has accumulated Remove the sediment and to a depth greater than one- dispose of it in a location half the original design where it will not cause depth of the provided sump impacts to streams or the BMP Remove the sediment and Sediment has accumulated dispose of it in a location to 10% of storage area where it will not cause (approx. 0.3 feet deep) impacts to streams or the BMP Structural damage has Repair or replace the vault The underground storage occurred to the vault, access and/or mechanical pipes hatch, access ladders, and/or weirs components as necessary Clear vents from all Blocked, damaged, or blockages and make plugged air vents structural repairs/replacements as necessary Clean out the outlet device. Clogging has occurred Dispose of the sediment off -site The outlet device is Repair or replace the outlet The outlet device damaged device Contact the City of Erosion or other signs of Huntersville Public Works damage have occurred in Department at the outlet 704-920-4200 Permit Number:__ (to be provided by DFYQ) I acknowledge and agree by my signature below that 1 am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Caldweli Station BMP drainage area number:South System Print name: o h n Title: e-c i,+ l g- X1`1 c rn e ,r- r Address: 17S .l)cad',ASD. -I j j 11 hw«y, CCinccirlej /16 C. 2 V014 Note. The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, 9 �1Cfr r 1vf ar�G _ , a Notary Public for the State of MC , County of C et bar rt--s , do hereby certify that �To hrr E, 14 personally appeared before me this 3?" day of 9,013 , and acknowledge the due execution of the forgoing sand filter Maintenance requirements. Witness my hand and official seal, ;U Ca �Ui:a`��, *� SEAL My commission expires Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 3 of 3