Agenda - Council - 05/26/1981 - Laserfiche WebLink

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ANOKA COUNTY COMMUNITY HEALTH & SOCIAL SERVICES ENVIRONMENTAL SERVICES Policy and Proceedures For Landfill Water Monitoring GENERAL The goal Of a landfill ground water monitoring program is to detect changes in ground water quality, caused by landfill leachate, and to monitor the movement and strength of that leachateplume in the groundwater. A landfill ground water monitoring program will generally consist of three phases or areas of considera- tion. These are: 1) Phase I - Basic/Initial Monitoring; 2) Phase II - Expanded Monitoring; and 3) Phase III - Restoration and Mitigation. The purpose of the basic monitoring program is to identify baseline water quality and any changes in water quality that might result from landfill leachate. This monitoring is to serve as an early warning system and will utilize generalized (non-hazardous) parameters that are most likely to be present in initial leachate and to migrate the fastest. When the basic monitoring program identifies a sta- tistically significant trend of change in water quality,'the program must be modi- fied to deal with the new conditions. This new or expanded monitoring program will better dilineate the location, direction of flow, and character of the leachate plume to provide for adequate assessment of health and environmental impact end the need for remedial or restorative action (Phase III). Although water monitoring i~ a condition of license and minimum standards and guide- lines are setforthby the County, it is and shall remain the licensee's responsibi- lity to provide for the adequacy of the monitoring program and the protection (and restoration) of the waters of the County. p~ASE I MONITORING PROGRAM The Phase I monitoring program design and operation is the responsibility of the licensee and shall include at least the following: 1. A hydrogeologic study shall be conducted to define the water-hearing layers beneath the site, determine the direction of ground water flow in these layers, and establish the proper placementof wells. -- 2. The water~nitoring program should be conducted as setforth in ~edtlo~ 265.93 (b), (c), and (d) and 265.94 (b), of the May 19, 1980 Federal Register pages 33241-33242). The annual report required shall be submitted to the Department by April 30 each year. 3. A minimum of at least three surftcial ground water monitoring wells shall be provided (one up-gradient and two down-gradient from the fill area) and such additional wells as may be necessary to adequately monitor the site. 4. At least one set of nested wells shall be installed up-gradient of the fill. These nested wells shall be developed in the surficial ground water, the glacial till, and the top of the bedrock. Undisturbed sol1 samples shall be collected at 5 foot intervals and changes in formation and classified accord- ing to ASIMI-D2486. Said samples shall be retained and turned over to'the. Department after classification. Water level m~asurements shall be made quarterly as outlined below.