Ripening landfill odor over the last six months has right along been attributed to several main culprits: Overabundance of wet sewage sludge, an ineffective gas collection system and insufficient covering that leaves landfill sections exposed. What the county Board of Supervisors Planning and Environmental Quality Committee learned at the presentation was that causes and a slew of recommended solutions are generally agreed upon by both parties — by CEC, Civil & Environmental Consultants, Inc. hired by Casella, and SCS Engineers of New York, PC, hired by the county.