The Missing UST Closure Letter
You are conducting a Phase I Environmental Site Assessment for a 2.4-acre parcel in a Midwestern state. The client plans to acquire it for a childcare center. The site operated as a gasoline service station from 1968 to 1994. Two 10,000-gallon underground storage tanks were reportedly removed in 1997, but the client's file has no state closure letter; the state UST database lists the tanks as 'removed-no further action' with the note 'documentation incomplete.' You locate a 1996 Phase II report showing benzene at 8.2 mg/kg in one boring (state residential standard 1.5 mg/kg) and a 'no impact' conclusion based on a single sample. A dry cleaner 60 m away has PCE in soil gas at 120 µg/m³. Your scope follows ASTM E1527-21 and the AAI rule. The client asks you to 'leave out the old report' to avoid a bank delay. You have 10 business days to deliver.
1. Identify the recognized environmental conditions (RECs), historical RECs (HRECs), and de minimis conditions in this file. Explain how the AAI rule affects what you must report and whether the 1996 Phase II conclusion can be relied on.
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The 1996 benzene result of 8.2 mg/kg is a REC: it exceeds the state residential standard by more than five times, the sample was limited to one boring, and there is no regulatory closure or confirmation that contamination was removed. The two USTs without a closure letter are also a REC because the database note expressly says documentation is incomplete; a 'removed-no further action' status without a closure letter does not establish that a release was investigated. The dry cleaner's PCE at 120 µg/m³ is a REC because a childcare center is a sensitive receptor and the vapor-intrusion pathway is plausible at 60 m. The 1996 'no impact' conclusion is not a HREC; a HREC requires contamination that has been addressed and closed with regulatory approval. It is not de minimis either, because de minimis conditions generally do not rise to a REC and do not require action. Under the AAI rule, you must identify and report all RECs and data gaps, and you cannot omit a known report to satisfy a transaction schedule. The 1996 Phase II is unreliable because it relied on a single boring, had a detection above criteria, and used an unsupported conclusion. The Phase I should recommend a Phase II with soil borings near the former tank cavity and a vapor-intrusion assessment for the childcare building.
2. The client directs you to omit the 1996 report. Describe your response, the reporting you would produce, and the legal and professional exposure you would create by complying.
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I would decline the instruction in writing and explain that the Phase I must disclose the 1996 report and the unresolved UST status. Omitting a known environmental report would make the Phase I misleading and could defeat the client's ability to claim innocent-landowner or bona fide prospective-purchaser protection under AAI. It could also expose the firm and me to claims of negligent misrepresentation, fraud, and state licensing discipline. The report should include the 1996 benzene detection, the missing closure letter, the dry-cleaner PCE result, and a clearly labeled data-gap section explaining why the prior 'no impact' conclusion cannot be relied on. I would document the client's request and my advice in the project file, preferably by email, and offer a path forward: complete the Phase II before the lender's deadline or issue the Phase I with the RECs and a recommendation for further assessment. If the client insists on deletion, I would withdraw rather than sign a false or misleading document. The 10-day schedule is a business constraint, not a basis for changing the technical conclusion.