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A. To ensure that BADCT requirements are met, the Department shall ask to review engineering plans and specifications for a sewage treatment facility with a design flow of one million gallons per day or greater if:
1. The design report required in R18-9-B202(A) fails to provide sufficient detail to determine adequacy of the proposed sewage treatment facility design;
2. The described design is innovative and does not reflect treatment technologies generally accepted as demonstrated within the industry;
3. The Department's calculations of removal efficiencies based on the design report show that the treatment facility cannot achieve BADCT performance requirements;
4. The design report does not demonstrate:
a. Protection from physical damage due to a 100-year flood,
b. Ability to continuously operate during a 25-year flood, or
c. Provision for a standby power source.
5. The design report shows inconsistency in sizing or compatibility between two or more unit process components of the sewage treatment facility;
6. The designer of the facility has:
a. Designed a sewage treatment facility of at least a similar size on less than three previous occasions,
b. Designed a sewage treatment facility that has been the subject of a Director enforcement action due to the facility design, or
c. Been found by the Board of Technical Registration to have violated a provision of A.R.S. Title 32, Chapter 1.
7. The permittee seeks to expand its sewage treatment facility and the Department believes that BADCT will require upgrades to the design that have not been described and evaluated in the design report.
B. The Department shall review engineering plans and specifications and a design report upon request by an applicant seeking a permit for a sewage treatment facility, regardless of its flow.
C. The Department may inspect an applicant's facility without notice to ensure that construction generally conforms to the design report.
© NAU 1998-2001
This document was created by the Onsite Wastewater Demonstration Project of the Civil and Environmental Engineering Department at Northern Arizona University. You may reproduce this document in it's entirety in any medium provided you include this copyright notice.This material is provided AS IS with absolutely NO WARRANTY OR GUARANTEE OF ACCURACY. The user makes use of this material at their own risk. You are advised to check original sources.