Rail spur or railroad tracks on or beside the subject property

A rail spur crosses the subject property, or a railroad line runs along its boundary, in use or long since taken up. The body of the standard does not mention railroads, and a track alone answers nothing. Whether there is a recognized environmental condition (REC) depends on four things: where the track lies, what it served and for how long, whether a release along it is known, and what the ground shows today.

What the answer turns on

A REC is hazardous substances or petroleum products present at the subject property because of a release, likely present owing to a release or a likely one, or present where conditions make a future release a material threat (E1527-21, 3.2.73). The standard's appendixes are nonmandatory.

Where the track lies. A spur inside the boundary belongs to the history of the subject property's uses. So does a former line now inside it, because the subject property is taken at its present boundaries whatever its past shape (E1527-21, 8.3.2, 8.3.8). A line beside the subject property is on another property. A property adjoins when its border touches the subject property's, or is separated from it only by a street, a road or another public thoroughfare (E1527-21, 3.2.4); the standard does not say whether a rail line is such a thoroughfare. What adjoined in the past may differ from what adjoins now, and the environmental professional should take that into account (E1527-21, 8.3.2). Appendix X4 says a REC cannot lie off the subject property, though an off-site release can cause one. With no known release on the other property, two judgments go together: a likely release there and likely presence at the subject property (E1527-21, X4.1).
What it served, and for how long. The professional considers what releases past uses could have led to (E1527-21, 8.3.1). The standard does not say what a railroad carries, stores or leaves along its track. For a likely release, Appendix X4's factors to consider include features or operations involving hazardous substances or petroleum products, how long they lasted and in what period (E1527-21, X4.1). Establish which occupant the spur served, what was loaded and unloaded there, and the years the track was in use. Where the sources show only an industrial or manufacturing use, further standard historical resources are reviewed when reasonably ascertainable and likely to identify the specific use, short of data failure (E1527-21, 8.3.6, 8.3.7).
Whether a release along it is known. Appendix X4 lists observations, data, documents and interviews as direct evidence of a release (E1527-21, X4.1). Release has the federal cleanup statute's meaning, and the standard notes that the statute's exclusions may affect the professional's opinions and conclusions (E1527-21, 3.2.75). The National Contingency Plan (40 CFR part 300) prints that definition, which leaves out "emissions from the engine exhaust of a motor vehicle, rolling stock, aircraft, vessel, or pipeline pumping station engine" (40 CFR 300.5). That exclusion, one of several in the definition, names engine exhaust only. Where the records show a herbicide or a pesticide was applied along the track, see former orchard or farm for what the legal background appendix reports on the application of registered pesticides (E1527-21, X1.1.4.3).
What the ground shows today. Odors, drums and containers, storage tanks and their pipes, stained soil or pavement, stressed vegetation, and ground graded or filled in a way that suggests solid waste are site visit features (E1527-21, 9.4.12, 9.4.13, 9.4.15, 9.4.23, 9.4.24, 9.4.25). A line on other land is observed from the edge of the subject property and from public thoroughfares; the standard does not call for entry onto another property (E1527-21, 9.2.5). A release that is found is weighed against the de minimis definition (E1527-21, 3.2.20): see staining on pavement or soil.

The records that bear on it

Historical sources. Aerial photographs, fire insurance maps, local street directories and historical topographic maps are reviewed where the professional judges them applicable, likely to be useful and reasonably ascertainable (E1527-21, 8.3.8). Compare dates for when a track appears and when it is gone. Obvious uses of adjoining properties are identified with their earliest dates (E1527-21, 8.3.9).
Government records. The federal list of reported releases is searched for the subject property only (ERNS; E1527-21, 8.2.2, Table 2). Cleanup lists reach farther (search distances), and each listed site within its search distance gets the professional's judgment on its significance (E1527-21, 8.1.10).
Interviews. Interview questions shall try to cover current and past uses, those of adjoining properties among them (E1527-21, 9.4.3, 9.4.4, 10.2). Outside the case of an abandoned property, the standard requires no interview with a neighbor; it lists owners and occupants of adjoining properties among its sources of historical information (E1527-21, 8.3.3, 10.5.5).

What the federal rule says

Among what the inquiry must seek to identify, the inquiry rule (40 CFR part 312) lists

Properties adjoining or located nearby the subject property that have environmental conditions that could have resulted in conditions indicative of releases or threatened releases of hazardous substances to the subject property.

40 CFR 312.20(e)(1)(vii), edition revised as of July 1, 2025

For a party seeking the liability protections that item stops at hazardous substances; the standard includes petroleum products (E1527-21, 1.1.2).

How it is written up

The spur or the line is described with the other identified uses of the subject property or of the adjoining properties (E1527-21, 8.3.8, 8.3.9). It becomes a finding when the professional judges it may indicate presence or likely presence at the subject property, and the opinion reasons for or against calling it a REC (E1527-21, 12.5, 12.6).

Where the professional concludes a release occurred or is likely, and presence at the subject property follows, the opinion gives the grounds: where the track lies, what it served and when, the record of any release, what the ground shows. Unless judged a de minimis condition or a historical REC, the REC is listed in the Conclusions, and the professional should give an opinion on additional investigation, if any (E1527-21, 3.2.20, 3.2.39, 12.7, 12.8).

Where the professional concludes otherwise, the opinion gives its reasoning on the same four facts (E1527-21, 12.6).

Historical sources may fail to show what a spur served or the years a line was in use. Required information that good faith efforts could not obtain is a data gap, significant if it affects the ability to identify a REC: named in the Findings with the sources consulted, discussed in the Opinions and listed in the Conclusions (E1527-21, 3.2.19, 3.2.78, 12.5.1, 12.6.2, 12.7).

This page is general reference for environmental professionals. It does not classify any property. ASTM E1527-21 is the standard and is not reproduced here; the judgment of the environmental professional on the facts governs.