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PREFACE Performance evaluation of individual aerobic wastewater treatment plants is achieved within the provisions of NSF Standard 40: Individual Aerobic Wastewater Treatment Plants (revised July 1990),prepared by the NSF joint Committee on Wastewater Technology and adopted by the NSF Board of Trustees. Conformance with the standard is recognized by issuance of the NSF Mark. This is not to be construed as an approval of the equipment but rather a certification of the data provided by the test and an indication of compliance with the requirements expressed in the.standard. Plants conforming to Standard 40 are classified as Class I or Class II plants according to the quality of effluent produced by the plant during their performance evaluation. Class I plants must also demonstrate performance consistent with the effluent color, odor, oily film .and foam requirements of the standard. Class I plants must satisfy the requirements of meeting EPA Secondary Treatment Guidelines2 for five day biochemical oxygen demand, suspended solids and pH. Permission to use the NSF Mark is granted only after the equipment has been tested and found to perform satisfactorily, and all other requirements of the standard have been satisfied. Continued use of the Mark is dependent upon evidence of compliance with the Standard and NSF T- General and Program Specific Policies as determined by periodic reinspection of the equipment %11 at the factory, distributorships and reports from the field. NSF Standard 40 requires the testing laboratory to provide the manufacturer of an individual aerobic wastewater treatment plant a report including significant data and appropriate commentary relative to the performance evaluation of the plant. NSF policy specifies provision of performance evaluation reports to appropriate regulatory agencies at publication. Subsequent direct distribution of the report by NSF is made only at the specific request of or by permission of the manufacturer. The following report contains results of the entire testing program, a description of the plant, its operation and key process control equipment, and a narrative summary of the test program, including test location, procedures and significant occurrences. The plant represented herein reflects the equipment authorized to bear the NSF Mark. iii Draft Report