The Anatomy of an Investigation.

Every investigation file at this office begins with a single page: the Intake Memo. The Memo identifies the source channel (tip submission, CPRA disclosure, regulatory docket entry, or first-person patronage interest), the date of first encounter, the geographic locus of the condition, and a one-sentence statement of the standing theory that will be tested in the field.

The Intake Memo is the first artifact subject to conflict screening. Before any field work is performed, the subject entity and any known affiliated parties are run against the office's declined-matter log and against any open referral relationships with retained counsel. A matter that fails conflict screening at intake is documented and closed; the Intake Memo is preserved in a sealed file regardless of whether the investigation proceeds.

Intake also establishes the file's serial number. Serials are sequential within each vertical and carry the year of intake in their middle segment (e.g., CAL-TIII-2026-0001). The serial is not changed if the investigation later changes vertical; the original serial becomes the cross-reference and a new serial is opened for the second vertical.

Scope discipline is the most underrated quality-control mechanism in field investigation. An undisciplined investigation accumulates barriers as it goes, with the scope expanding in response to whatever the investigator sees on site. The resulting file is unreviewable, because the methodology no longer matches what was measured.

Scoping at this office is done in writing before the field visit. The Scoping Memo enumerates the specific subsections of the 2010 ADA Standards or the California Building Code Chapter 11B that will be measured; the specific accessible elements (entrance, path of travel, restroom clearance, point-of-sale counter, pool lift, signage) that will be photographed; and the specific public-records requests, if any, that will be served before or after the field visit.

A finding that falls outside the Scoping Memo is not added to the file. It is recorded in a separate Out-of-Scope Observations log and routed to a new Intake Memo if it warrants its own investigation. This separation prevents post-hoc scope expansion and preserves the integrity of the measurement chain.

Field work begins with the Arrival Note: the time of arrival, the weather and lighting conditions, the vantage point from which the first photograph is taken, and a verbatim record of any interaction with staff. The Arrival Note is the foundation of the chain of custody for everything that follows.

Photography proceeds from a wide baseline (a single establishing shot of the subject venue from the public right-of-way) to a tight detail (the specific noncompliant element). Every photograph is captured with original camera settings preserved; no in-camera editing is permitted. The image hash and EXIF metadata are recorded in the Field Log within the same minute the photograph is taken.

Measurement is performed with calibrated tools whose calibration certificates are on file at the office. A digital level is used for slope measurements; a steel measuring tape, never a fabric tape, is used for linear distances; a torque-style force gauge is used where door-opening force is at issue. Each measurement is recorded twice (one investigator measures, one investigator records) and the disagreement, if any, is flagged in the Field Log.

Departure closes the Field Log with the time of departure and a statement that no element observed was modified, altered, or removed. The Field Log is signed, dated, and sealed before the investigator leaves the site.

A measurement that is not paired with the standard it tests is not a measurement; it is a number. The Measurement Table in every published investigation file pairs each measured value with its standard, its tolerance under the Construction Tolerances guidance, and the calibration status of the tool used.

Slope measurements are recorded at three points along the same axis; the recorded value is the highest of the three. Reach-range measurements are taken with the investigator in the position a person using a wheelchair would actually occupy, not from a standing posture. Door-opening force is measured at the door handle, perpendicular to the door face, with the door at rest.

Where a measurement falls within Construction Tolerances (the dimensional tolerances normally associated with the means and methods of construction), the file records the tolerance bracket and notes that the condition is not a violation. This is not a courtesy to the defense; it is the only way a Measurement Table survives expert cross-examination.

The Evidence Log is a single ledger per investigation. Every artifact is assigned a unique evidence ID and a SHA-256 hash at the moment of acquisition. Photographs are hashed immediately on the camera's storage card; sealed physical samples are hashed by recording the seal serial number and capturing a photograph of the seal at the moment of sealing.

Every transfer of custody is logged: who released, who received, the date and time, the means of transfer (hand-carried, FedEx with tracking, encrypted upload). Where an artifact is uploaded for laboratory analysis, the upload receipt is captured in the log and the lab is required to confirm receipt and return a counter-hash on opening.

An Evidence Log entry is never deleted, modified, or backdated. Corrections are recorded as amendments with their own timestamp. The Evidence Log is the document that, in deposition, lets the witness say with confidence: this is what I found, this is when I found it, this is where it has been every minute since.

Legal mapping is the phase that distinguishes a field-investigation report from a CASp inspection report. A CASp inspection produces a finding against the California Building Code; a field-investigation report adds the federal statutory hook, the CFR section, the 2010 ADA Standards citation, and the controlling 9th Circuit decision interpreting that section in this jurisdiction.

The Regulatory Citation Table records, for each measured noncompliance: the statutory subsection (e.g., 42 U.S.C. § 12182(b)(2)(A)(iv)), the implementing regulation (28 C.F.R. § 36.304), the dimensional standard (2010 ADA Standards § 404.2.9), the controlling case law (Chapman v. Pier 1), and, where applicable, the parallel state-law hook (Unruh Civil Rights Act, Cal. Civ. Code § 51).

Where the legal mapping reveals a gap — a measured noncompliance with no clear federal hook, or a federal hook with no recent 9th Circuit application — the gap is noted in the file and not concealed. The Methodology page publishes the office's general legal-mapping framework; the file documents the specifics.

The Peer Review Memo asks a small number of structured questions, all of which must be answered in writing before publication: Does the Field Log support every photograph cited in the report? Does the Measurement Table cite the calibrated tool for each measurement? Does the Evidence Log show unbroken custody? Does the Regulatory Citation Table cite the controlling 9th Circuit case? Are all redactions necessary and consistent across the file?

A peer reviewer who answers any of these questions in the negative is required to return the file to the lead investigator with a written explanation. The file does not advance to publication until the reviewer signs an affirmative Peer Review Memo.

Where the peer reviewer identifies a methodological issue not previously documented in the Methodology page, the Methodology page is amended in the same publication cycle. The Methodology is, by design, a living document; peer review is the principal mechanism by which it is updated.

The published file is structured as a self-contained exhibit. Counsel reading the file should be able to determine, without any external reference, what was measured, what standard it was measured against, what the result was, and what the chain of custody was. The published file is the office's primary work product.

Redactions are narrow and explained. Subject identifiers, street addresses, and source identifying information are routinely redacted; methodology, measurements, and legal mapping are never redacted. The redaction key on the published file enumerates each category of redaction and the policy basis for it.

The office maintains a notice-of-correction policy modeled on AP/ProPublica practice. Any factual error in a published file is corrected within five business days of confirmation, with the correction noted at the head of the file. Substantive errors that affect a conclusion trigger a republication with a new revision date and a changelog.