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0%k NTECH" OPERATION AND <br /> ENGINEERED SOLUTIONS MAINTENANCE <br /> CatchBasin StormFilter'" <br /> Maintenance Guidelines Mosquito Abatement <br /> Maintenance procedures for typical catch basins can be applied In certain areas of the United States, mosquito abatement is <br /> to the CatchBasin Storm Filter (CBSF). The filter cartridges desirable to reduce the incidence of vectors. <br /> contained in the CBSF are easily removed and replaced during <br /> maintenance activities according to the following guidelines. In BMPs with standing water, which could provide mosquito <br /> breeding habitat, certain abatement measures can be taken. <br /> 1. Establish a safe working area as per typical catch basin <br /> service activity. 1. Periodic observation of the standing water to determine if <br /> the facility is harboring mosquito larvae. <br /> 2. Remove steel grate and diamond plate cover (weight 100 <br /> 2. Regular catch basin maintenance. <br /> lbs. each) or plastic grating. <br /> 3. Turn cartridge(s) approximately '/a turn counter-clockwise to 3. Use of larvicides containing Bacillus thuringiensis israelensis <br /> disconnect from pipe manifold. (BTI). BTI is a bacterium toxic to mosquito and black fly <br /> larvae. <br /> 4. Remove cartridges) from catch basin by hand or with <br /> appropriate hoisting equipment. In some cases, the presence of petroleum hydrocarbons may <br /> interrupt the mosquito growth cycle. <br /> 5. Remove accumulated sediment via vactor truck from all <br /> interior chambers. <br /> 6. Rinse interior of both bays and vactor remaining water and Using Larvicides in the CatchBasin StormFilter <br /> sediment. Larvicides should be used according to manufacturer's <br /> recommendations. <br /> 7. Install fresh cartridge(s), by rotating t/a turn clockwise, taking <br /> care not to damage cartridge connectors. Two widely available products are Mosquito Dunks and Summit <br /> B.t.i. Briquets. For more information, visit https://www.amvac. <br /> 8. Replace cover(s). com/products/summit-bti-briquets. <br /> 9. Dispose of accumulated debris and spent media in The larvicide must be in contact with the permanent pool. The <br /> accordance with local regulations. larvicide should also be fastened to the CatchBasin StormFilter <br /> 10. Return used, empty cartridges to Contech for refurbishing. to prevent displacement by high flows. A magnet can be used <br /> Media may be removed from the filter cartridges using the with a steel catch basin. <br /> vactor truck before the cartridges are removed from the catch For more information on mosquito abatement in stormwater <br /> basin structure once the top cap and hood are removed. The BMPs, refer to the following: https://anrcatalog.ucanr.edu/ <br /> vactor truck must be equipped with a hose capable of reaching pdf/8125.pdf. <br /> areas of restricted clearance. <br /> Empty cartridges can be easily removed from the catch basin <br /> structure by hand. Empty cartridges should be reassembled and <br /> returned to Contech as appropriate. <br /> Refurbished cartridges are available from Contech on an <br /> exchange basis. Contact the maintenance department of <br /> Contech at 513-645-7770 for more information. <br /> Onsite maintenance is estimated at 26 minutes once setup for <br /> a single cartridge unit. Add approximately 5 minutes for each <br /> additional cartridge. <br /> Page 2 www.ContechES.com/stormwater 800-338-1122 <br /> ©2020 Contech Engineered Solutions,a Quikrete Company <br />