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PART I Page 4e Permit No. CO-0044776 '-:`- A. DEFINfCION OF EFFLUENT LIMITATIONS 2. BiasoLds T.~tationc_ and Management Requirements (continued) - d. Biosolids Management Practices (n If the biosolids or material derived from biosolids meet the pollutant concentration limizs in Part I.A.2.a), the Class A pathogen reduction limits in Part I.A.2.b) and one of the firs[ four vector aaraction reduction alternatives in Part I.A.2.c), the following management practices aze not required unless requested by the Division through permit modification procedures under Part II.B.g.e) of this peratit. (ii) The permittee shall operate and maintain the land application site operations in accordance with the following requiremenzs: (1) The petmittee shall provide to the Division and to EPA within 90 days of the issuance of this permit a land application plan. At a minimum, the plan is to include the components listed in section 2.3 of the latest version of the EPA Region VIII Biosolids Management Handbook, (2) Application of biosolids shall be conducted in a manner that will not contaminate the groundwater underlying the sites. Biosolids shall not be applied to any site area with standing water or wfiere the annual high groundwater level is less than five feet without written permission of the Division. (3) Application of biosolids shall be conducted in a manner that will not cause a violation of'any receiving water quality standard from dischazges of surface runoff from the land application sites. Biosolids shall ": not be applied to land 10 meters or less from waters of the U.S. (as defined in 40 CFR 122.2). (4) Application of biosolids shall be conducted in a manner that does not exceed the agronomic rate for available nitrogen of the crops grown on the site. The treatment plant shall provide written notification to the applier of the biosolids, if not the same, of the concentrafion of total nitrogen (as N on a dry weight basis) in the biosolids. Written permission from the Division is required to exceed the agronomic rate. (5) No person shall apply sludge for beneficial use to frozen, ice-covered, or snow-covered land where the ' slope of such land is greater than three percent and is less than or equal to five percent unless one of the following requirements is met: A. a vegetated buffer strip of at least 50 feet is provided between the application area and the site boundary; or, B. Division approval has been obtained based upon a plan demonstrating adequate runoff containment measures. (6) The biosolids or the application of the biosolids shall not cause or contribute to the harm of a threatened or endangered species or result in the destruction or adverse modification of critical habitat of a threatened or endangered species after application. AmendmentNo. 1 Issued JUN 2 O 1999 Effective AUG ~' 1~9A