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I OPERATION AND CONTECH® I ENGINEERED SOLUTIONS MAINTENANCE 1 CatchBasin StormFilterT" Maintenance Guidelines Mosquito Abatement Maintenance procedures for typical catch basins can be applied In certain areas of the United States, mosquito abatement is to the CatchBasin StormFilter(CBSF). The filter cartridges desirable to reduce the incidence of vectors. contained in the CBSF are easily removed and replaced during I maintenance activities according to the following guidelines. In BMPs with standing water,which could provide mosquito breeding habitat, certain abatement measures can be taken. 1. Establish a safe working area as per typical catch basin service activity. 1. Periodic observation of the standing water to determine if I the facility is harboring mosquito larvae. 2. Remove steel grate and diamond plate cover (weight 100 lbs. each). 2. Regular catch basin maintenance. 3. Turn cartridge(s) counter-clockwise to disconnect from pipe 3. Use of larvicides containing Bacillus thuringiensis israelensis Imanifold. (BTI). BTI is a bacterium toxic to mosquito and black fly larvae. 4. Remove 4"center cap from cartridge and replace with I lifting cap.5. Remove cartridge(s) from catch basin by hand or with vactor In some cases,the presence of petroleum hydrocarbons may interrupt the mosquito growth cycle. truck boom. 6. Remove accumulated sediment via vactor truck (min.I Using Larvicides in the CatchBasin StormFilter clearance 13"x 24"). Larvicides should be used according to manufacturer's recommendations. 7. Remove accumulated sediment from cartridge bay. (min. I clearance 9.25"x 1 1"). Two widely available products are Mosquito Dunks and Summit B.t.i. Briquets. For more information,visit http://www. 8. Rinse interior of both bays and vactor remaining water and summitchemical.com/mos ctrl/d efault.htm. sediment. — I The larvicide must be in contact with the permanent pool. The 9. Install fresh cartridges) threading clockwise to pipe larvicide should also be fastened to the CatchBasin StormFilter manifold. by string or wire to prevent displacement by high flows. A 10. Replace cover and grate.1 magnet can be used with a steel catch basin. 11. Return original cartridges to Contech for cleaning. For more information on mosquito abatement in stormwater Media may be removed from the filter cartridges using the BMPs, refer to the following: http://www.ucmrp.ucdavis.edu/ vactor truck before the cartridges are removed from the catchI publications/managingmosquitoesstormwater8125.pdf basin structure. Empty cartridges can be easily removed from the catch basin structure by hand. Empty cartridges should be Ireassembled and returned to Contech as appropriate. Materials required include a lifting cap,vactor truck and fresh filter cartridges. Contact Contech for specifications and 111 availability of the lifting cap. The vactor truck must be equipped with a hose capable of reaching areas of restricted clearance. the owner may refresh spent cartridges. Refreshed cartridges are also available from Contech on an exchange basis. Contact the maintenance department of Contech at 503-258-3157 for more information. IMaintenance is estimated at 26 minutes of site time. For units with more than one cartridge, add approximately 5 minutes for each additional cartridge. Add travel time as required. IP Page 2 URBANGREENT" :�,=' www.ContechES.com/stornnwater Stormwater Solutions from Contech' % 800-338-1122 ©2013 Contech Engineered Solutions