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<br />Exhibit "e" <br /> <br />CONTECH MAINTENANCE GUIDELINES <br /> <br />Maintenance procedures for typical catch basins can be applied to the <br />CatchBasin StormFilter (CBSF). The filter cartridges contained in the CBSF <br />are easily removed and replaced during maintenance activities according to <br />the following guidelines. <br /> <br />. Establish a safe working area as per typical catch basin service activity. <br />. Remove steel grate and diamond plate cover (weight 100 Ibs. each). <br />. Turn cartridge(s) counter-clockwise to disconnect from pipe manifold. <br />. Remove 4" center cap from cartridge and replace with lifting cap. <br />. Remove cartridge( s) from catch basin by hand or with vactor truck boom. <br />. Remove accumulated sediment via vactor truck (min. clearance 13" x <br />24"). <br />. Remove accumulated sediment from cartridge bay. (min. clearance 9.25" <br />x II ") <br />. Rinse interior of both bays and vactor remaining water and sediment. <br />. Install fresh cartridge(s) threading clockwise to pipe manifold. <br />. Replace cover and grate. <br />. Return original cartridges to CONTECH Stormwater Solutions for <br />cleaning and media disposal. <br /> <br />Media may be removed from the filter cartridges using the vactor truck before <br />the cartridges are removed from the catch basin structure. Empty cartridges <br />can be easily removed from the catch basin structure by hand. Empty <br />cartridges should be reassembled and returned to CONTECH <br />Stormwater Solutions, as appropriate. <br /> <br />Materials required include a lifting cap, vactor truck, and fresh filter <br />cartridges. Contact CONTECH Stormwater Solutions for specifications and <br />availability of the lifting cap. The vactor truck must be equipped with a hose <br />capable of reaching areas of restricted clearance. The owner may refresh spent <br />cartridges. Refreshed cartridges are also available from CONTECH <br />Stormwater Solutions on an exchange basis. Contact the maintenance <br />department of CONTECH Stormwater Solutions at (503) 240-3393 for more <br />information. <br /> <br />Maintenance is estimated at 26 minutes of site time. For units with more than <br />one cartridge, add approximately 5 minutes for each additional cartridge. Add <br />travel time as required. <br /> <br />MOSQUITO ABATEMENT <br /> <br />Page 4 of 5 <br />