ozone

Verified O3 identity

Require an explicit chemical identity and evidence appropriate to the occurrence, with uncertain identification retained as uncertain.

1. What evidence identifies O3 rather than O2, another oxidant or an unspecified active-oxygen product? definition
2. Who or what supplied the identification, and was it analytically verified for this occurrence? provenance

Bounded ozone occurrence

Identify whether the record concerns a sample, process stream, dissolved constituent or environmental volume, including its spatial and temporal limits.

1. Which sample, stream or environmental volume contains the ozone, and over what interval is it represented? boundary
2. Which properties describe O3 itself, and which belong to the carrier, mixture or surrounding atmospheric system? boundary

Comparable ozone quantity

Record units, phase or carrier, reference conditions and averaging or integration bounds before comparing values.

1. Is the value a gas mole fraction, mass concentration, dissolved concentration, total amount or atmospheric column abundance? measurement
2. What temperature, pressure, wet/dry basis and temporal or vertical integration limits are needed to interpret or convert it? measurement

Selectivity and sample integrity

Record calibration, interference checks, detection capability and assessed ozone losses between the occurrence and measurement.

1. Which method, calibration and interference checks support the reported ozone value and uncertainty? provenance
2. How were sampling delay, tubing or vessel interactions, and changes during sample handling assessed? measurement
3. Does a low result mean quantified ozone, below detection, below quantification or an invalid measurement? measurement

Attributed ozone input

Link ozone to evidenced formation processes, supplied streams or transport, without treating a suspected source as established.

1. Was this ozone formed locally, deliberately supplied or transported into the boundary, and what supports that attribution? provenance
2. What observations distinguish generator output or incoming ozone from the amount actually delivered to the location of interest? measurement

Condition-dependent ozone fate

Separate reaction or decomposition from dilution and phase transfer, and constrain predictions to observed or validated conditions.

1. What concentration-time evidence constrains persistence in this matrix at the recorded temperature, light exposure and mixing conditions? measurement
2. How much apparent ozone loss represents chemical consumption, dilution, transfer to another phase or measurement artefact? boundary
3. When must ozone be measured again before an earlier observation can support another action? action

Effective ozone contact

Distinguish applied dose, competing matrix demand and measured residual throughout the relevant contact period.

1. What target reaction or treatment outcome is intended, and what validated criterion connects it to ozone contact under these conditions? action
2. What delivered dose, residual profile, contact time and competing ozone demand were actually measured? measurement

Verified treatment and product fate

Require outcome evidence separate from ozone application, and link reaction products to their own substance assessments.

1. What independent observation demonstrates that the intended target was transformed or the treatment objective was achieved? measurement
2. Which reaction products need investigation for this matrix, and what evidence supports their identification and disposition? boundary

Ozone contact assessment

Link exposure location and duration to affected people, organisms and materials, including possible transfer from treated liquid to surrounding gas.

1. Which people, organisms or materials can encounter ozone, by which pathway and for how long? boundary
2. What measurements at the exposure location and what ozone-specific material compatibility evidence support the assessment? measurement

Evidence-bound ozone action

Record the proposed action, governing criterion, required controls and verification evidence without inventing a universal permissible concentration.

1. Which current rule or validated procedure governs this action, jurisdiction, receptor and averaging period? provenance
2. What conditions must be verified before ozone generation, treatment, access, discharge or restart may proceed? action
3. After isolation or ozone destruction, what residual measurements and reaction-product checks establish that the named clearance condition is satisfied? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these kinds and varieties hold for the sense of ozone this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these identifiers and schemes hold for the sense of ozone this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these standards and regulation hold for the sense of ozone this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these real-world use hold for the sense of ozone this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these typical measurements hold for the sense of ozone this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these failure modes and hazards hold for the sense of ozone this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these regional variation hold for the sense of ozone this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of ozone this model covers, and on what evidence? provenance