TE SW23 cmp_maintenance_guide.pdf
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Contech® CMP Detention & Infiltration Maintenance Guide
ENGINEERED SOLUTIONS
CMP DETENTION SYSTEMS
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Contech® CMP Detention
Underground stormwater detention/infiltration and retention systems must be properly inspected and maintained at regular intervals for purposes of performance and longevity.
Inspection Inspection is the key to effective maintenance and is easily performed. Contech recommends ongoing quarterly inspections.
The rate at which the system collects pollutants will depend more heavily on site specific activities rather than the size or configuration of the system. Inspections should be performed more often in equipment washdown areas, in climates where sanding and/or salting operations take place, and in various other instances in which higher accumulations of sediment or abrasive / corrosive conditions may exist. Inspection and maintenance records should be maintained for the life of the system.
Maintenance
Systems should be cleaned when inspection reveals that accumulated sediment or trash is clogging the discharge orifice.
Accumulated sediment and trash can typically be evacuated through the manhole over the outlet orifice. If maintenance is not performed as recommended, sediment and trash may accumulate in front of the outlet orifice. Manhole covers should be securely seated following cleaning activities. Contech suggests that all systems be designed with an access/inspection manhole situated at or near the inlet and the outlet orifice. Should it be necessary to get inside the system to perform maintenance activities, all appropriate precautions regarding confined space entry and OSHA regulations should be followed.
If inspectors observe any salt or other corrosive substance concentrations or accumulations in the system, or if salt or other corrosive substance is used or prevalent near the system, it is recommended to rinse the system above the spring line annually between late spring and early summer as part of the maintenance program. This maintenance is required for infiltration systems.
Excessive salting should be avoided and pavement should be sealed to reduce salt infiltration from the surface.
Maintaining an underground detention or retention system is easiest when there is no flow entering the system. For this reason, it is a good idea to schedule the cleanout during dry weather.
The foregoing inspection and maintenance efforts help ensure underground pipe systems used for stormwater storage continue to function as intended by identifying recommended regular inspection and maintenance practices. Inspection and maintenance related to the structural integrity of the pipe or the soundness of pipe joint connections is beyond the scope of this guide.
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Inspection & Maintenance Log Sample Template
__________” Diameter System Location: Anywhere, USA
Date Depth of Sediment
Accumulated Trash
Maintenance Performed
Maintenance Personnel
Comments
12/01/10 2” None Removed Sediment B. Johnson Installed
03/01/11 1” Some Removed Sediment and Trash B. Johnson Swept parking lot
06/01/11 0” None None
09/01/11 0” Heavy Removed Trash S. Riley
12/01/11 1” None Removed Sediment S. Riley
04/01/12 0” None None S. Riley
04/15/01
Some Removed Sediment and Trash ACE Environmental
Services
SAMPLE
Support Drawings and specifications are available at www.ContechES.com.
Site-specific support is available from our engineers.
©2016 Contech Engineered Solutions LLC
Contech Engineered Solutions LLC provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, stormwater, earth stabilization and wastewater treatment products. For information, visit www.ContechES.com or call 800.338.1122.
NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR
MORE INFORMATION.
The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218;
6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297,266; related foreign patents or other patents pending.
800.338.1122 www.ContechES.com
ENGINEERED SOLUTIONS
CMP DETENTION SYSTEMS
CMP Maintenance Guide PDF 6/16
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