Expertise. Innovation. Commitment.


Environmental Site Closure

We take away the guesswork for clients with site investigation, delineation, remediation, and closure services.


We employe a dedicated team of environmental and safety professionals to help alleviate the worry of meeting EHS compliance for our clients.

Environmental Due Diligence

We are committed to providing quality, responsive environmental due diligence services.

Building Science

We work with commercial and industrial clients to ensure their property and building-related environmental and safety concerns are addressed.


We’ve developed a Compliance Assurance Program (eCAP® ) that transforms the way companies maintain regulatory compliance.


August Mack is a nationally recognized, award-winning, environmental consulting firm with eight offices in seven states. We provide due diligence and building science services, regulatory compliance services, and subsurface investigation and remediation services to a wide range of clients.


August Mack employs numerous experienced engineers, geologists, environmental scientists, chemists, and industrial hygienists.


Environmental Sampling: Good Data In, Good Data Out

Environmental sampling approaches and technology have come a long way over the last 30-years.  These improvements have led to an increase in quality of the data and the overall confidence of the results.  Despite the improvements in sampling equipment, technology, and analysis, “bad data” is still collected, processed, and reported.  Bad data, as defined here, … more »

Why a Clean Phase I Environmental Site Assessment Can Be Misleading For Those Involved With Post-Closing Construction Activities

A Phase I Environmental Site Assessment is the de facto Environmental Due Diligence standard (ASTM E1527-13) for most commercial property transactions in the United States. The Phase I is used to identify the presence or likely presence of Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) hazardous substances or petroleum product releases at a commercial … more »


Environmental Sampling: Good Data In, Good Data Out

Mar 3, 2021 @ 3:00PM

The goal of any environmental sampling program is to answer a specific set of questions. The good news is that environmental sampling approaches and technology have improved significantly over the last 40 years, which has led to increased confidence in the data collected. However, the data is still only as good as the thought and … more »

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When A Clean Phase I Environmental Assessment Can Be Misleading

Mar 17, 2021 @ 3:00PM

Environmental due diligence for commercial property transactions usually starts with an ASTM compliant Phase I ESA. While the Phase I ESA protects against CERCLA liability, there are a multitude of other key environmental factors that can impact your deal or have ramifications down the line. Items that often pose a business risk include asbestos, wetlands, … more »

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Understanding Soil Management Plans

Mar 31, 2021 @ 3:00PM

Cleaning up contaminated properties can take a long time at great expense. In most cases, conducting a completely “clean” cleanup is not always feasible and can be cost-prohibitive. As a result, risk-based closures are becoming more common, which means residual contamination remains behind and environmental restrictions are applied to the property. These restrictions must be … more »

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