Quick Resource: http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/Quick%20Resouce-%20Maintenance%20%28final%29.pdf
Other resources:
Information on maintenance can be found in many water harvesting manuals: http://wrrc.arizona.edu/DWHI/resources/definitionsandstrategies
EPA literature review with information on operation and maintenance of water harvesting stystems: http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/EPA_Rainwater%20Harvesting%20Conservation%2C%20Credit%2C%20and%20Codes-%20Literature%20Review%20and%20Case%20Studies.pdf
EPA report on green infrastructure operations and maintenance in ARRA Clean Water State Revolving Fund Projects: http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/EPA_Importance%20of%20Operation%20and%20Maintenance%20for%20the%20Long-Term%20Success%20of%20Green%20Infrastructure.pdf