The AI platform for Environmental Due Diligence.
Compyle automates the production work behind every Phase I ESA — from data collection through draft report — so your EPs can take on more projects without taking on more hours.
Request a demo →Same-day historical data.
No ordering from EDR or ERIS. No 3–10 day wait.
Source-linked claims.
Every finding traces back to the record it came from.
Your template. Your voice.
Drafts land in your firm’s report template, not ours.
The end-to-end Phase I ESA workflow.
Compyle handles the desk work — from first record to final draft. Your EPs handle what only an EP can do.
47 Baker Street, Portland ME
Historical aerial photos
1968 – 2024 · USGS, NETR
Sanborn fire insurance maps
1887 – 1951 · Library of Congress
City directories
1920 – 1990 · Ancestry, local archive
USGS topographic quads
1894 – 2021 · USGS
Regulatory database records
Federal, state, tribal · All ASTM lists
All records, collected automatically.
Historical aerials, Sanborn maps, city directories, regulatory database records — all data required by the ASTM standard — collected for every property, automatically. At a fraction of the cost and a fraction of the time it takes to order from EDR or ERIS.
8 conditions surfaced
Former gasoline service station on-site (1942 – 1978)
Dry cleaner operated adjacent (1962 – 1985, remediated)
Two 4,000-gal heating oil USTs, no closure records
Minor asphalt staining at loading dock
Every data source analyzed. Every finding surfaced.
Compyle processes each aerial photograph, Sanborn map, city directory, and regulatory record to identify findings and flag conditions across the site and surrounding properties.
5.2 Historical Use of the Property
The subject property was developed prior to 1887 as documented on the earliest available Sanborn Fire Insurance Map. From 1887 through 1941, the parcel was occupied by a residential dwelling and associated outbuildings.
Beginning in 1942, the site operated as a Texaco branded gasoline service station, as identified on the 1951 Sanborn Map (sheet 4) and corroborated by the 1955 Portland City Directory. The facility remained in operation as a service station until 1978, at which point the structure was razed.
From 1980 to present, the site has been occupied by the current one-story commercial structure used for retail use.
Sections drafted like you wrote them.
Compyle drafts your Phase I report sections in your firm's template and voice. Claims are grounded in the source record. Your EP reviews a draft, not a blank page.
Your EPs stay in control of every word.
Your EPs review the AI draft directly in the report editor — leaving comments, suggesting edits, and approving sections. Nothing ships without their sign-off. The final report is yours.
7.1 Recognized Environmental Conditions
Based on the historical research and site reconnaissance, the following Recognized Environmental Conditions (RECs) were identified at the subject property.
Former gasoline service station operation on-site from 1942 to 1978. Two underground storage tanks documented in Sanborn 1951 with no evidence of formal closure in state UST registry.
Given the duration of operation and the absence of UST closure records, sampling of site soil and groundwater is recommended prior to redevelopment.
Confirm UST capacity — 4,000 gal or 6,000? Check Sanborn 1948.
Suggest tightening to ‘Phase II subsurface investigation.’
More margin on every Phase I.
Order from EDR or ERIS. Wait 3–10 days.
Same day. At a fraction of the cost.
Manual review of aerial photos, Sanborn maps, city directories — one record at a time.
AI-analyzed, finding by finding, every source linked.
Junior EP writes from scratch. Senior EP rewrites.
AI-drafted sections in your firm’s template, grounded in the source record.
Senior EP reviews junior work line by line against raw data.
Senior EP reviews an AI draft — not raw files.
No hallucinations.
No black boxes.
You still sign every draft. Each claim Compyle writes is traceable to a source document. All regulatory records are captured in a versioned, auditable file.
Built around ASTM E1527-21 from day one, Compyle is designed for the QC and peer review your firm already does — not in spite of it.
A Texaco-branded gasoline service station operated on the subject property from 1942 through 1978.
“Texaco Service Sta. — 2 U.G. gasoline tanks, pump island under canopy”
Library of Congress G1234.P67 · retrieved 2026-04-08
“Baker Street 47 — Smith Bros Texaco, Martin T. Smith, prop.”
Ancestry.com · ID 3fc1·8891 · retrieved 2026-04-08
Visible pump island, canopy, and tank vent stacks consistent with active service station use.
USGS EarthExplorer · Entity AR1VBMM · retrieved 2026-04-08
Engineers who shipped AI in compliance — at scale.
Compyle is built by Jonathan Miranda and Mark Nazzaro — early AI engineers at Hadrius (YC W23). At Hadrius they built the core AI systems running compliance reviews for thousands of businesses. They started Compyle to bring that same rigor — sourced, reviewable, and audit-grade — to environmental consulting.
Founding engineer #4 at Hadrius (YC W23), where he helped build the core AI systems running compliance reviews for thousands of businesses. Computer Science & Economics, Johns Hopkins.
Second engineer at Hadrius, scaled it through Series A. Previously led the cloud migration at arXiv — shipping systems academic researchers trust with their primary record of work.
See it on a
real property.
Request a 30-minute demo. Bring a property address from your last project — we'll show you what Compyle does with it.