Duffield Assoicates

Duffield Assoicates is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Engineers Environmental
• Engineers Foundation
• Environmental Conservation & Ecological Services
• Testing Laboratories

North American Industry Classification System (NAICS) Categories:

• Engineering Services > Engineers Construction & Civil > Engineers Foundation
• Engineering Services > Engineers Environmental
• Testing Laboratories
• Administration Of Air And Water Resource And Solid Waste Management Programs > Environmental Conservation & Ecological Services

Standard Industry Classification (SIC) Categories:

• Engineering Services > Engineers Construction & Civil > Engineers Foundation
• Engineering Services > Engineers Environmental
• Testing Laboratories
• Air And Water Resource And Solid Waste Management