Phase I Environmental Site Assessment

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port of houston
Texas Department of State Health Services
Goldman Sachs - 10,000 small businesses
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port of houston
Texas Department of State Health Services
Goldman Sachs - 10,000 small businesses
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    KEITH O.

    Nirav and his team at RSB Environmental are very helpful with our company’s environmental needs. Always courteous and informative in regards to our questions.

    LARRY R.​

    RSB Environmental is a great company, they are easy to work with and handle all our Environmental needs in a friendly professional way. I would recommend RSB Environmental for all your company’s environmental needs.

    What is a Phase I Environmental Site Assessment?

    Phase I Environmental Site AssessmentA Phase 1 Environmental Site Assessment is a scientific report following ASTM Standards that evaluates hidden environmental risks and liabilities about a property. It is often referred to as a Phase I ESA or Phase I Environmental Assessment, and can be part of the real estate due diligence process. To start, a Phase 1 ESA rigorously studies the historical and current land-uses of a property. Additionally, it documents the likelihood of contamination from that history.

    It is an essential requirement in the purchase of industrial properties (also known as environmental due diligence). Phase I ESAs investigate for potential environmental risk of contamination on a property that would affect its value and its report will state if additional testing or investigation is required. If a site or property has a history of business operations by dry cleaners, a Phase II Environmental Site Assessment may most likely be required as a follow-up.

    How Long Does It Take To Complete A Phase I ESA?

    phase 1 esa

    RSB has the available environmental Scientist and field engineers to complete multi-site portfolios nationwide with very short due dates (7-10 business days).

    We take pride in the fact that we provide quality Phase One ESA Reports for less cost than our competitors.

    RSB is the Environmental site assessment leader by volume. All our phase 1 reports are completed to meet the standards of ASTM E1527-13.

    How Long Is A Phase I Environmental Site Assessment (ESA) Valid For?

    A standard Phase I Environmental Site Assessment (ESA) is only good for 6 months. After 6 months, the Phase I ESA reports need to be thoroughly updated. A year after the initial report date, your Phase I ESA is no longer valid.

    Our Phase I Environmental Site Assessments

    Our Phase I Environmental Site Assessments are completed by experienced staff and all are directed by environmental professionals with a minimum of 10-year’s experience. Our projects are very cost-effective because we are a small employee-owned company and we do not have the large overhead and expenses of a large company. We have the available staff and experience to complete multi-site portfolios with very short due dates. We take pride in the fact that we can provide quality Phase I Environmental Site Assessment reports for less cost than our competition. We serve all major metros including – Houston, Dallas, San Antonio, Austin, and Beaumont and beyond.

    RSB Environmental is the national leader in Phase I Environmental Site Assessment by volume. Most reports are performed to meet the standards of ASTM E1527-13 (which replaced the former ASTM standard, E1527-05 on November 6th 2013). RSB Environmental often customizes phase 1 reports to meet individual client or agency lender’s (Fannie Mae, Freddie Mac) requirements while taking the widely varying geology and topography of Texas into consideration.

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    What is the Process of a Phase I Environmental Site Assessment (ESA)


    We obtain Federal, State, County and Municipal regulated databases within 1 mile of your property. We survey the records and determine if your property, the neighboring property or a surrounding property is regulated or has a known or suspect release to the environment.


    We search for environmentally sensitive businesses, such as dry-cleaners, plating facilities, and gas stations that at one time may have occupied your property or your neighbor’s property.


    Fire Insurance Maps are highly detailed drawings of urbanized areas and can include environmental data such as the occupant, location of underground storage tanks, presence of chemicals, and much more. We survey these maps if available in the property location to identify potential environmental concerns.

    Years Phase I Environmental


    Aerial photographs are available for almost every year dating back to 1938 for most areas in the nation. Historic aerials can show the change of use of a property over time. For example, when a property changed from vacant to a residential or commercial use.


    We interview the past and current property owners, key site managers, occupants, and government officials to obtain information about the history of the property. In addition, we submit Freedom of Information Requests (FOIAs) to gather data on file with local, state and federal agencies. We use this information to scrutinize or clarify certain issues and elements with regard to the property.


    An RSB Environmental Professional, trained in identifying any signs of environmental issues will be performing the walkthrough to your property.


    RSB’s PHASE i ESA report is generated under the industry standard that is accepted by banks and the Small Business Administration (SBA). Most Phase 1 ESAs come back fine, while others will identify what are called Recognized Environmental Conditions (RECs) which may need further investigation. That deeper dive to understand the RECs is called a Phase 2 ESA.

    RSB is reliable, accurate, and experienced. We have a track record of over a 1000 managed and completed projects across all 50 states per year. Our team of environmental consultants, engineers, and project managers has provided thousands of highly satisfied clients.

    We are committed to getting the job done right, call us at 1-800-304-6517 or email at to get a site-specific price for your property.

    Our Service Areas

    RSB has conducted Phase 1 Environmental Site Assessment projects nationwide. Locally, RSB has completed numerous projects in Texas (including all major metros – Houston, Dallas, San Antonio, Austin, and Beaumont).

    Please feel free to call us at 1-800-304-6517 or email at to get a site specific price for your property.

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