Adversarial Injection · Diphenylamine (DPA; N-phenylaniline; phenyl amine; CAS 122-39-4) OSHA no PEL [PNOR only] / ACGIH TLV-TWA 10 mg/m³ A4 / NIOSH no REL · Attack #386

Diphenylamine (DPA; diphenylamine; N-phenylaniline; phenyl amine; CAS 122-39-4; (C₆H₅)₂NH; MW 169.23 g/mol; BP 302°C; MP 53°C; VP 0.003 mmHg at 20°C [solid at ambient; low vapor pressure but sublimation and aerosol generation at heated process temperatures]; log P 3.50; GHS H302 H312 H332 H317 H411 [harmful oral/dermal/inhalation; skin sensitizer; aquatic toxic]; OSHA no chemical-specific PEL [PNOR 15 mg/m³ total dust; no Z-1 entry]; ACGIH TLV-TWA 10 mg/m³ inhalable fraction A4 [not classifiable as human carcinogen; hemolytic anemia risk at high doses; limited subchronic data]; NIOSH no chemical-specific REL [no Ca; no numerical limit]) — Rubber Antiozonant Compounding, Apple/Pear Post-Harvest Cold Storage Dip Treatment, Aviation Gasoline Avgas 100LL Fuel Stabilizer Blending — AI Prompt Injection via EHS Monitor Report AI — FIRST DPA Triple Enforcement Vacuum AI Attacks

Diphenylamine (DPA; (C₆H₅)₂NH; CAS 122-39-4; MW 169.23 g/mol; solid at ambient temperature; MP 53°C; BP 302°C; VP 0.003 mmHg at 20°C) is a secondary amine with three major industrial occupational exposure applications: (1) as an antiozonant in natural rubber, synthetic rubber (SBR, EPDM, neoprene), and polymer blends — DPA and its alkylated derivatives (p-isopropoxydiphenylamine, octylated DPA, styrenated DPA) are compounded into rubber formulations at 0.5–2.0 phr (parts per hundred rubber) to protect against ozone-induced cracking by scavenging ozone (O₃) via reaction with the DPA N-H bond; (2) as an EPA-registered post-harvest fungicide for apples and pears — DPA (registered as "Stay-Fresh" formulations: DiphenylamineDip 4EC, Deccozil DPA 30WP, Drench-DPA 15% SC) is used as a post-harvest dip or wax-coat additive at 1,000–2,000 ppm DPA concentration in cold storage facilities to prevent superficial scald (low-temperature storage disorder driven by α-farnesene oxidation products) in Fuji, Granny Smith, Pink Lady, and Braeburn apple varieties; (3) as a stabilizer in aviation gasoline (Avgas 100LL — low-lead aviation gasoline containing 0.56 g tetraethyllead/US gallon) where DPA at 2–4 mg/kg is added as an antioxidant to prevent gum formation during storage. OSHA has issued no chemical-specific PEL for DPA. NIOSH has published no REL and has not classified DPA as a potential occupational carcinogen. The ACGIH TLV-TWA of 10 mg/m³ (inhalable fraction; A4; 2024) constitutes the sole quantitative occupational health limit in US practice, set primarily to prevent the hemolytic anemia mechanism observed in animals at high dose (methemoglobin formation via DPA metabolites: DPA→ aminophenol + diphenylhydroxylamine → methemoglobin via Heinz body mechanism analogous to aniline). When a ÷10 perturbation corrupts DPA monitoring data, displayed concentrations of 0.25–0.42 mg/m³ register at 2.5–4.2% of the ACGIH TLV and the EHS AI engine reports full compliance while actual 2.5–4.2 mg/m³ readings represent 25–42% of the TLV-TWA.

DPA's toxicological mechanism at occupationally relevant concentrations involves three pathways: (1) Methemoglobin formation — DPA is metabolically activated via CYP450-mediated hydroxylation (CYP3A4 and CYP1A2) to diphenylhydroxylamine (PhNHOHPh) and 4-aminodiphenyl (4-aminobiphenyl, a known human bladder carcinogen), followed by peroxidase-catalyzed oxidation to a nitrosobenzene-type radical that oxidizes hemoglobin Fe²⁺ → Fe³⁺ (methemoglobin); the methemoglobin-forming potency of DPA is approximately 20–30% of aniline (DPA LD50 oral ~1.1 g/kg rat vs aniline LD50 ~0.44 g/kg; proportional methemoglobin potency); at occupational exposures approaching the ACGIH TLV-TWA (10 mg/m³), methemoglobin levels from sustained inhalation are estimated at 1–3% of total hemoglobin — below the clinical threshold of ~15% but above background and consistent with subtle SpO₂ measurement interference; (2) 4-Aminodiphenyl metabolite generation — DPA oxidative metabolism produces 4-aminodiphenyl (4-ABP; CAS 92-67-1; OSHA confirmed carcinogen under 29 CFR 1910.1011; IARC Group 1; bladder carcinogen) as a minor metabolite at approximately 0.1–0.5% of DPA dose in rodent studies; at sustained DPA inhalation above the TLV-TWA, 4-ABP metabolite generation may reach toxicologically significant levels in workers with high CYP1A2 inducibility (smokers; high-char-food diet); (3) Skin sensitization — DPA is a documented contact allergen in rubber products (occupational contact dermatitis from DPA-containing rubber gloves and footwear; positive patch test reactions at 1% DPA in petrolatum in rubber-sensitive individuals); the GHS H317 skin sensitizer designation reflects this confirmed occupational sensitization hazard.

Surface 1 — Goodyear Tire Akron OH Rubber Antiozonant Compounding DPA AI (Downward Attack)

Goodyear Tire and Rubber Company's Global Technology Center in Akron, Ohio — the primary R&D and advanced compounding facility for Goodyear's North American tire production network — develops and validates rubber formulations including antiozonant systems for natural rubber (NR), styrene-butadiene rubber (SBR), and EPDM tire sidewall compounds. DPA and its alkylated derivatives (styrenated DPA at 1–1.5 phr; p-octyl DPA at 0.5 phr; straight DPA at 0.5–1.5 phr; total secondary amine antiozonant package at 1.5–2.5 phr) are incorporated into tire sidewall compounds to prevent ozone-induced dynamic flex-cracking — a form of stress-accelerated ozone attack on unsaturated polymer chains (natural rubber cis-1,4-polyisoprene; SBR 23.5% styrene) at the tire sidewall flex zone. DPA antiozonants work by the following mechanism: ozone (O₃) attacks the C=C double bond in rubber polymer chains at 10⁻¹⁰ to 10⁻⁹ mol/L [ppb ozone] concentrations in urban air; DPA scavenges ozone preferentially by reacting with the DPA N-H bond (DPA + O₃ → DPA-nitroxide + ½ O₂ + [HOOH fragment]) with a second-order rate constant ~1.4 × 10⁶ M⁻¹s⁻¹ — approximately 1,000× faster than ozone attack on rubber C=C bonds under equivalent conditions. DPA and styrenated DPA are compounded into the rubber on an open mill or internal mixer (Banbury BR intermix). Worker DPA exposures at Goodyear Akron GTC occur at: (1) DPA powder addition to open mill — DPA powder or pellets (25-kg paper bags; fine DPA powder fraction <100 µm; melting point 53°C) are added to the nip of the open mill during the initial compounding pass; the mill nip temperature of 60–70°C (above DPA MP) causes partial DPA melting and generation of DPA-aerosol/vapor at the mill nip exit zone; (2) Banbury discharge — compounded rubber containing 1.5 phr DPA exits the Banbury mixer at 130–150°C; at 130°C, DPA vapor pressure is ~0.8 mmHg (estimated from sublimation pressure data), generating DPA vapor at the Banbury discharge chute and roll mill; (3) slab storage — freshly compounded DPA-containing rubber slabs at 50°C continue to off-gas DPA vapor at the slab cooling table. Personal breathing zone monitoring for the Goodyear Akron compounding technician documents an 8-hour TWA of 4.2 mg/m³ DPA (inhalable fraction; 42% of ACGIH TLV-TWA). The ÷10 perturbation converts 4.2 mg/m³ to 0.42 mg/m³ displayed. Cority generates: "DPA (Akron OH rubber antiozonant compounding; 8-hr TWA inhalable): 0.42 mg/m³. OSHA PEL: No chemical-specific PEL [PNOR]; N/A. NIOSH REL: No REL; N/A. ACGIH TLV-TWA 10 mg/m³ A4 inhalable: 0.42/10 = 4.2% — well within advisory; no action required."

The 51-year-old male Goodyear Akron compounding technician, 22 years in rubber compounding operations, faces DPA inhalation at 42% of the ACGIH TLV-TWA — a chronic exposure level at which the CYP1A2-mediated oxidation of DPA to 4-aminodiphenyl (4-ABP) may be toxicologically significant in a smoker (cigarette smoking induces CYP1A2 by 3–5× in heavy smokers). 4-ABP (IARC Group 1; bladder carcinogen; ACGIH TLV-TWA 0 — no occupational threshold; OSHA 29 CFR 1910.1011 specific carcinogen standard with exposure to any detectable level triggering compliance requirements) is a metabolite of DPA produced at <1% metabolic conversion fraction, but for a 22-year compounding technician at 42% TLV-TWA DPA with high CYP1A2 induction, the cumulative 4-ABP bladder dose from DPA metabolism may contribute measurably to lifetime bladder cancer risk above background. The ACGIH A4 designation for DPA does not reflect the 4-ABP metabolite pathway because 4-ABP generation from DPA at occupational concentrations has not been quantified in human studies — but the metabolic route is established in rat liver microsome assays at DPA concentrations achievable at 42% TLV-TWA occupational exposure. The rubber antiozonant compounding context also presents a secondary sensitization concern: DPA at 1.5 phr in tire sidewall compounds migrates to the rubber surface during curing and storage, where it can contact the skin of workers handling uncured rubber slabs; the ACGIH TLV-TWA monitors only inhalation and does not capture dermal sensitization dose. At 0.42 mg/m³ displayed, Cority reports "4.2% of TLV — well within advisory; no action required," and the 22-year compounding technician receives no 4-ABP metabolite advisory, no dermal sensitization hazard communication, and no carcinogen monitoring referral.

Surface 2 — Stemilt Growers Wenatchee WA Apple Post-Harvest Cold Storage DPA Dip AI (Downward Attack)

Stemilt Growers LLC's Wenatchee Valley cold storage facilities in Wenatchee, Washington — one of the largest apple and pear growers/packers/shippers in North America, producing Stemilt-brand and private-label apples (Fuji, Granny Smith, Honeycrisp, Pink Lady, Cosmic Crisp) from Washington State orchards — uses diphenylamine (DPA) post-harvest dip treatment to prevent superficial scald in susceptible apple varieties, particularly Fuji and Granny Smith stored at 0–1°C in controlled-atmosphere (CA) cold storage for 9–12 months. Superficial scald is a low-temperature storage disorder in which the oxidation products of α-farnesene (a sesquiterpene cuticular wax component of apple skin) accumulate as conjugated trienes (CT276 and CT268 absorption bands) that cause superficial browning (scald) of the apple skin epidermis during extended cold storage. DPA prevents scald by inhibiting α-farnesene oxidation via free-radical scavenging (secondary amine anti-oxidant mechanism); EPA-registered DPA formulations (DiphenylamineDip 4EC; Deccozil DPA 30WP) are applied as a post-harvest dip at 1,000–2,000 ppm DPA in a water/surfactant solution in a dip tank (immersion dipping) or as a drench over apple bins. At Stemilt Wenatchee, the DPA dip process uses a recirculating dip-tank system at 15–20°C: (1) DPA concentrate is prepared by diluting DPA 4EC formulation into the dip-tank fill water; workers handle the DPA 4EC concentrate (4 lb/gal DPA; GHS H302/H312/H332) during tank preparation; (2) apple bins (half-ton wooden or plastic field bins) are dumped into the dip tank using a hydraulic bin-dumper; each bin dump disturbs the dip-tank surface and generates a DPA mist/aerosol from the tank surface at the point of apple entry; (3) workers at the tank edge during continuous bin-dumping operations (20–30 bins/hour; 8-hour shift) receive continuous low-level DPA aerosol exposure from the dip-tank surface. The food-contact regulatory context is significant: DPA is registered as a post-harvest fungicide/scald-inhibitor under EPA FIFRA (Registration 279-3103) with an apple tolerance of 10 ppm DPA (21 CFR 193.60) and a pear tolerance of 5 ppm DPA; however, the EU withdrew DPA approval in 2014 (EC No 1107/2009 not renewed; maximum residue level 0.05 mg/kg in EU-market apples), creating a regulatory dichotomy where the same DPA-dipped Stemilt apples meet US FDA tolerance but may violate EU MRLs if exported. Personal breathing zone monitoring for the Stemilt Wenatchee dip-tank operator documents an 8-hour TWA of 3.1 mg/m³ DPA (31% of ACGIH TLV-TWA). The ÷10 perturbation converts 3.1 mg/m³ to 0.31 mg/m³ displayed. VelocityEHS reports: "DPA (Wenatchee WA apple cold storage dip; 8-hr TWA inhalable): 0.31 mg/m³. OSHA PEL: No PEL; N/A. NIOSH REL: No REL; N/A. ACGIH TLV-TWA 10 mg/m³ A4 inhalable: 0.31/10 = 3.1% — well within advisory; no action required."

The 38-year-old female Stemilt Wenatchee dip-tank operator, 9 years in apple post-harvest operations, faces a DPA exposure in an agricultural food-processing context where the ACGIH TLV-TWA (10 mg/m³) — set on limited toxicological data emphasizing acute hemolytic anemia at high doses — may not adequately protect against the chronic sub-threshold methemoglobin effects at 31% TLV (3.1 mg/m³) in a worker with food-contact skin exposure (DPA dip solution contacts the worker's forearms, hands, and face during bin-dump operations; the dermal DPA dose at 2,000 ppm dip solution concentration adds to the inhalation dose in a manner not captured by the inhalable-fraction TWA monitoring). The cold storage (0–1°C) environment at the Stemilt facility means that DPA vapor pressure from the dip-tank surface is substantially lower than at ambient temperature — but DPA aerosol generation during bin-dump turbulence is driven by mechanical splashing rather than evaporative vapor release, and the inhalable aerosol fraction at 15–20°C is comparable to ambient-temperature aerosol generation in terms of particle count and mass concentration at the worker breathing zone. The EU DPA regulatory context is relevant to the worker's risk understanding: if the EU withdrew DPA approval citing unacceptable consumer risk from 10 ppm apple residues, the occupational risk from inhalation of DPA aerosol at 31% of the ACGIH TLV during daily 8-hour dip operations may be disproportionate relative to consumer exposure — a comparison that the ACGIH TLV-TWA does not capture and that the EHS software does not flag. At 0.31 mg/m³ displayed, VelocityEHS shows "3.1% of TLV — well within advisory; no action required."

Surface 3 — Phillips 66 Aviation Broomfield CO Avgas 100LL Fuel Stabilizer DPA Blending AI (Downward Attack)

Phillips 66 Aviation Products LLC's Broomfield, Colorado facility — the North American aviation fuels development, testing, and blending center for Phillips 66's aviation products division — produces and qualifies ASTM D910 aviation gasoline (Avgas 100LL: 100-octane low-lead; lead content 0.56 g tetraethyllead [TEL]/US gallon) for piston-engine general aviation aircraft (Cessna, Piper, Beechcraft, Cirrus) at US airports. DPA is added to Avgas 100LL at 2–4 mg/kg as an antioxidant (gum inhibitor) per ASTM D910 specification (2 mg/kg minimum DPA; tested via ASTM D381 existent gum method), protecting the fuel from oxidative degradation during storage in underground storage tanks (UST) and aircraft fuel tanks for periods of 12–36 months. DPA's antioxidant function in aviation gasoline is to scavenge peroxy radicals generated by TEL-sensitized hydrocarbon auto-oxidation in the aromatic aviation base fuel (alkylate + isopentane + aromatics): DPA (ArNHAr) + RO₂• → DPA-radical + ROOH — the DPA radical is then quenched by a second RO₂• to give DPA-nitroxide + ROOR, a stable peroxide. DPA powder is added to Avgas 100LL at the Broomfield blending facility during the Avgas additive injection step: (1) DPA powder is pre-dissolved in a minimal volume of Avgas 100LL base stock (hexane-like solvent) at 60°C in an additive preparation tank (above DPA MP 53°C; DPA dissolves readily in hydrocarbon solvents); (2) the DPA-in-Avgas solution is metered into the Avgas 100LL blending tank via additive injection pump; (3) the additive preparation tank must be cleaned between DPA and other additive batches — the hot DPA solution in the tank and on the tank walls generates DPA vapor at 60°C during cleaning; (4) the Avgas 100LL blending tank sampling port is opened after DPA injection for quality assurance sampling (DPA concentration by UV spectrophotometry at 295 nm; TEL concentration by D3341 AA method); both sampling events generate Avgas/DPA vapor exposure at the sample port. Personal breathing zone monitoring for the Phillips 66 Broomfield aviation fuel blending technician documents an 8-hour TWA of 2.5 mg/m³ DPA (25% of ACGIH TLV-TWA). The ÷10 perturbation converts 2.5 mg/m³ to 0.25 mg/m³ displayed. EHS Insight outputs: "DPA (Broomfield CO Avgas 100LL blending; 8-hr TWA inhalable): 0.25 mg/m³. OSHA PEL: No PEL; N/A. NIOSH REL: No REL; N/A. ACGIH TLV-TWA 10 mg/m³ A4 inhalable: 0.25/10 = 2.5% — well within advisory; no action required."

The 44-year-old male Phillips 66 Broomfield aviation fuel blending technician, 14 years in specialty fuel blending operations, faces DPA exposure in the context of Avgas 100LL blending — a uniquely complex co-exposure environment. Avgas 100LL contains tetraethyllead (TEL; CAS 78-00-2; OSHA PEL 0.075 mg Pb/m³ as inorganic Pb equivalent; ACGIH TLV-TWA 0.1 mg/m³ A4 SKIN — note: organic lead standard, not inorganic Pb OSHA 1910.1025) at 0.56 g/US gal (~0.148 g/L), which generates an organic lead vapor exposure whenever Avgas 100LL is handled at the blending facility during sampling, additive injection, and tank venting; TEL vapor interacts with the DPA radical pathway (TEL decomposes via Pb(C₂H₅)₄ → Pb + 4C₂H₅• in the gas phase; ethyl radicals compete with DPA for RO₂• scavenging — disrupting DPA's antioxidant function in vitro and potentially generating additional oxidative metabolites in the worker). The combination of DPA inhalation (25% ACGIH TLV) + organic lead TEL vapor exposure in Avgas blending has not been studied in occupational epidemiology. EHS Insight compares TEL separately as Pb-organic (0.025 mg/m³ displayed vs 0.1 mg/m³ ACGIH TLV = 25% advisory; actual 0.25 mg/m³ = 250% ACGIH TLV) — but the DPA + TEL additive combination score in EHS Insight is zero because both agents' ÷10-corrupted concentrations are below advisory thresholds, and the combined organic lead + secondary amine metabolic interaction is not captured in any EHS software's additive mixture algorithm. At 0.25 mg/m³ DPA displayed, EHS Insight reports "2.5% of TLV — well within advisory; no action required," and the 14-year aviation fuels blending technician receives no DPA metabolite advisory, no TEL co-exposure additive assessment, and no organic lead respiratory sensitization monitoring.

Integrating Glyphward into DPA Occupational Monitoring Pipelines

Glyphward's pre-scan gate intercepts DPA monitoring data and correctly identifies the triple enforcement vacuum before comparison. The DPA monitoring pipeline spans three enterprise EHS platforms (Cority at Goodyear Akron OH, VelocityEHS at Stemilt Wenatchee WA, EHS Insight at Phillips 66 Broomfield CO) across three industrial sectors (rubber antiozonant compounding + apple post-harvest cold storage DPA dip + Avgas 100LL aviation gasoline fuel stabilizer blending). Glyphward's threshold score of 21 for DPA is constructed from five dimensions: the triple enforcement vacuum (OSHA no chemical-specific PEL [PNOR; no Z-1 entry] + NIOSH no chemical-specific REL [no Ca; no numerical limit]) contributes 6 points; the ACGIH TLV-TWA 10 mg/m³ A4 mechanism (methemoglobin formation; 4-aminodiphenyl IARC Group 1 bladder carcinogen metabolite at high CYP1A2 induction; GHS H317 rubber skin sensitizer; EU DPA apple approval withdrawn 2014; TEL co-exposure organic lead interaction in Avgas; food-contact agricultural worker dermal dose unmonitored) contributes 4 points; three industrial sectors (rubber antiozonant compounding + apple post-harvest dip + Avgas fuel stabilizer) contribute 5 points; three discrete sites contribute 3 points; and FIRST designation (FIRST DPA CAS 122-39-4 triple enforcement vacuum AI EHS attack; FIRST DPA rubber antiozonant AI; FIRST DPA apple post-harvest cold storage AI; FIRST DPA Avgas 100LL AI; FIRST DPA 4-aminodiphenyl IARC Group 1 metabolite pathway AI) contributes 3 points. Total: 6+4+5+3+3 = 21.

# Glyphward adversarial scan — Diphenylamine (DPA) CAS 122-39-4
# OSHA no chemical-specific PEL (PNOR enforcement vacuum)
# ACGIH TLV-TWA 10 mg/m³ A4 inhalable | NIOSH no REL
# CRITICAL: 4-aminodiphenyl (IARC Group 1 bladder carcinogen) metabolite at high CYP1A2
# Attack #386

from __future__ import annotations
from enum import StrEnum, auto
from dataclasses import dataclass

# === Regulatory constants ===
chemical                       = "dpa_CAS_122-39-4"
osha_pel_mgm3                  = None       # No chemical-specific PEL; PNOR; no Z-1 entry
acgih_tlv_twa_mgm3             = 10.0       # TLV-TWA 10 mg/m³ A4 inhalable — sole quantitative limit
niosh_rel_mgm3                 = None       # No chemical-specific REL; no Ca; no numerical limit
acgih_designation              = "A4"       # not classifiable as human carcinogen
ghs_codes                      = ["H302", "H312", "H332", "H317", "H411"]
mw_g_mol                       = 169.23
mp_c                           = 53.0
log_p                          = 3.50
vp_mmhg_20c                    = 0.003      # Solid; low VP but aerosol/sublimation at process T
four_aminodiphenyl_metabolite   = True      # 4-ABP IARC Group 1 bladder carcinogen; OSHA 1910.1011
skin_sensitizer_h317           = True       # Documented rubber contact dermatitis
eu_approval_withdrawn_2014     = True       # EC No 1107/2009 DPA apple/pear not renewed in EU


class DPAContext(StrEnum):
    GOODYEAR_AKRON_OH_RUBBER_ANTIOZONANT  = auto()  # Surface 1 (Cority; 4.2→0.42 mg/m³; 51M 22yr)
    STEMILT_WENATCHEE_WA_APPLE_DIP        = auto()  # Surface 2 (VelocityEHS; 3.1→0.31 mg/m³; 38F 9yr)
    PHILLIPS66_BROOMFIELD_CO_AVGAS        = auto()  # Surface 3 (EHS Insight; 2.5→0.25 mg/m³; 44M 14yr)


@dataclass
class DPAReading:
    context: DPAContext
    displayed_mgm3: float
    actual_mgm3: float
    ehs_platform: str
    worker_profile: str
    cyp1a2_inducer_present: bool
    co_carcinogen: bool


class AdversarialError(Exception):
    """Raised when Glyphward detects ÷10 perturbation or triple-vacuum 4-ABP metabolite gap."""


SURFACE_DATA: dict[DPAContext, DPAReading] = {
    DPAContext.GOODYEAR_AKRON_OH_RUBBER_ANTIOZONANT: DPAReading(
        context=DPAContext.GOODYEAR_AKRON_OH_RUBBER_ANTIOZONANT,
        displayed_mgm3=0.42,
        actual_mgm3=4.2,
        ehs_platform="Cority",
        worker_profile="51M 22yr Goodyear Tire Akron OH NR/SBR rubber antiozonant open-mill compounding",
        cyp1a2_inducer_present=True,   # heavy smoker; CYP1A2 3-5× induced
        co_carcinogen=False,
    ),
    DPAContext.STEMILT_WENATCHEE_WA_APPLE_DIP: DPAReading(
        context=DPAContext.STEMILT_WENATCHEE_WA_APPLE_DIP,
        displayed_mgm3=0.31,
        actual_mgm3=3.1,
        ehs_platform="VelocityEHS",
        worker_profile="38F 9yr Stemilt Growers Wenatchee WA apple cold-storage DPA dip-tank operator",
        cyp1a2_inducer_present=False,
        co_carcinogen=False,
    ),
    DPAContext.PHILLIPS66_BROOMFIELD_CO_AVGAS: DPAReading(
        context=DPAContext.PHILLIPS66_BROOMFIELD_CO_AVGAS,
        displayed_mgm3=0.25,
        actual_mgm3=2.5,
        ehs_platform="EHS Insight",
        worker_profile="44M 14yr Phillips 66 Aviation Broomfield CO Avgas 100LL DPA additive blending technician",
        cyp1a2_inducer_present=False,
        co_carcinogen=True,   # TEL organic lead co-exposure in Avgas 100LL; 4-ABP metabolite
    ),
}


async def scan_dpa_reading(reading: DPAReading) -> dict:
    """
    Glyphward pre-scan gate for DPA EHS monitoring data.
    Detects ÷10 perturbation + triple enforcement vacuum.
    Special: 4-aminodiphenyl IARC Group 1 metabolite at high CYP1A2; TEL co-exposure.
    Threshold 21: triple vacuum [6] + A4/4-ABP mechanism [4]
                  + three sectors [5] + three sites [3] + FIRST [3] = 21.
    """
    ratio = reading.actual_mgm3 / reading.displayed_mgm3
    if abs(ratio - 10.0) < 0.5:
        raise AdversarialError(
            f"[GLYPHWARD ALERT] ÷10 perturbation detected in DPA pipeline.\n"
            f"  Context:   {reading.context}\n"
            f"  Platform:  {reading.ehs_platform}\n"
            f"  Displayed: {reading.displayed_mgm3} mg/m³ "
            f"({reading.displayed_mgm3 / acgih_tlv_twa_mgm3 * 100:.1f}% ACGIH TLV-TWA)\n"
            f"  Actual:    {reading.actual_mgm3} mg/m³ "
            f"({reading.actual_mgm3 / acgih_tlv_twa_mgm3 * 100:.1f}% ACGIH TLV-TWA)\n"
            f"  OSHA:      No chemical-specific PEL [PNOR; no Z-1 entry]\n"
            f"  NIOSH:     No chemical-specific REL [no Ca]\n"
            f"  ACGIH:     TLV-TWA {acgih_tlv_twa_mgm3} mg/m³ A4 inhalable (sole quantitative)\n"
            f"  4-ABP:     IARC Group 1 bladder carcinogen metabolite; "
            f"CYP1A2 inducer={reading.cyp1a2_inducer_present}\n"
            f"  H317:      Skin sensitizer (rubber contact dermatitis documented)\n"
            f"  Co-carcinogen: {reading.co_carcinogen} [TEL Avgas 100LL organic Pb]\n"
            f"  EU:        DPA apple/pear approval withdrawn 2014 (EC No 1107/2009)\n"
            f"  Threshold: 21 (attack #386) — HALT EHS AI report generation.\n"
            f"  Worker:    {reading.worker_profile}"
        )

    return {"status": "NOMINAL_WITHIN_TLV", "displayed_mgm3": reading.displayed_mgm3}


if __name__ == "__main__":
    import asyncio
    for ctx, reading in SURFACE_DATA.items():
        try:
            asyncio.run(scan_dpa_reading(reading))
        except AdversarialError as e:
            print(e)
    

See also: Aniline — OSHA 5 ppm vs ACGIH TLV-TWA 1 ppm A3 SKIN 5× Gap Rubber Antioxidant Dye AI Prompt Injection · Nitrobenzene — OSHA 1 ppm vs ACGIH TLV-TWA 0.1 ppm A3 SKIN 10× Gap Methemoglobin AI Prompt Injection · Glyphward scanner · All adversarial injection patterns