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Mr. Don Litchfield <br /> April 9, 2010 <br /> Page 6 <br /> SITE SURFACE OBSERVATION <br /> Visual observation of the landfill surface along the extent of the extraction system is also <br /> performed on a monthly basis. Observations for erosion, surface cracks (that might allow LFG <br /> to escape or promote air intrusion)and settlement around wells, laterals and main pipelines are <br /> conducted. <br /> During this reporting period, no settlement that might adversely impact(e.g., allow condensate <br /> accumulation such that a complete blockage could occur)the LFG collection system operation <br /> was observed,with the exception of the previously mentioned areas of the side slopes which are <br /> in need of repair. <br /> STANDARD PROVISIONS <br /> This report addresses conditions at the subject site during the reporting period only. <br /> Accordingly,we assume no responsibility for any changes that may occur subsequent to our <br /> monitoring which could affect the quantity of LFG at the subject site or adjacent properties. The <br /> client is responsible for ensuring that SCS and on-site personnel are the only parties designated <br /> to operate and adjust the LFG systems. <br /> Should you have any questions, do not hesitate to contact or either of the undersigned. <br /> Very truly yours, <br /> U) Jbvk V744'Y7 k%W <br /> Whitney M.Bills Sean T. Bass <br /> Project Professional Project Manager <br /> SCS FIELD SERVICES SCS FIELD SERVICES <br /> cc: Lochlin Caffey—Keller Canyon Landfill <br />