acms 9254a EDITEDDuffield Associates provides design, permitting and specialized third party construction quality assurance services to waste management facility owners and contractors related to municipal, residual, construction / demolition and hazardous waste management facilities. Our engineers, scientists and technicians have extensive experience in solid waste management engineering and construction that exceeds minimum criteria established by the USEPA, NICET, GCI and the geosynthetics industry. We provide a unique combination of services that blends our engineering expertise in design, permitting and construction with our in-house soils and geosynthetics laboratory testing capabilities, field testing, field observation and surveying experience, particularly in the area of geosynthetics that is rarely offered in total within the engineering community in North America.