In addition to the two publications Zephyr produces and publishes, Zephyr provides the technical authoring for Site Auditing: The Environmental Assessment of Property, published by Specialty Technical Publishers, of Vancouver, BC.

Site Auditing provides you with a history of the liability associated with acquiring contaminated property under CERCLA, including existing liability protections afforded by conducting All Appropriate Inquiry (AAI), summarizes the RCRA Corrective Action process, and walks you through conducting site investigations to achieve your assessment goals. The easy-to-understand presentation identifies the key steps that must be performed to comply with CERCLA requirements for conducting AAI under 40 CFR 312 and ASTM E1527-05, as well as undertaking subsequent assessment according to ASTM standards and provides guidance on how to carry out the details of the assessment in a timely and cost-effective manner. The manual also includes information on consultant liabilities, dealing with radioactive materials, insurance coverage, brownfields initiatives, and a checklist for conducting AAI.