Case A: St Albans sports pitches

{
  "gas": {
    "visit_rows": 12,
    "concentration_basis": "Reported concentration; source describes peak monitoring, with no separate initial/steady fields.",
    "max_reported_co2_pct": 1.9,
    "min_reported_oxygen_pct": 16.5,
    "automatic_characteristic_situation": null,
    "reason": "Monitoring sufficiency, response zones, temporal pairing, sources and building type need review."
  },
  "unmatched": {
    "soil | Stone Content | %": 27,
    "soil | Moisture Content | %": 27,
    "soil | Total mass of sample received | kg": 27,
    "soil | pH (L099) | pH Units": 24,
    "soil | Total Sulphate as SO₄ | mg/kg": 12,
    "soil | Water Soluble Sulphate as SO₄ 16hr extraction (2:1) | mg/kg": 24,
    "soil | Water Soluble SO₄ 16hr extraction (2:1 Leachate Equivalent) | mg/l": 12,
    "soil | Water Soluble SO₄ 16hr extraction (2:1) | mg/l": 12,
    "soil | Sulphide | mg/kg": 12,
    "soil | Water Soluble Chloride (2:1) | mg/kg": 12,
    "soil | Organic Matter (automated) | %": 12,
    "soil | Total Phenols (monohydric) | mg/kg": 12,
    "soil | Speciated Total EPA-16 PAHs | mg/kg": 12,
    "soil | Chromium (aqua regia extractable) | mg/kg": 12,
    "soil | Magnesium (water soluble) | mg/kg": 12,
    "soil | TPHCWG - Aliphatic >EC16 - EC21 EH_CU_1D_AL | mg/kg": 12,
    "soil | TPHCWG - Aliphatic >EC21 - EC35 EH_CU_1D_AL | mg/kg": 12,
    "soil | TPHCWG - Aliphatic >EC5 - EC40 EH_CU+HS_1D_AL | mg/kg": 12,
    "soil | TPHCWG - Aromatic >EC16 - EC21 EH_CU_1D_AR | mg/kg": 12,
    "soil | TPHCWG - Aromatic >EC21 - EC35 EH_CU_1D_AR | mg/kg": 12,
    "soil | TPHCWG - Aromatic >EC5 - EC40 EH_CU+HS_1D_AR | mg/kg": 12,
    "soil | TPH Total >EC5 - EC40 EH_CU+HS_1D_TOTAL | mg/kg": 12,
    "soil | MTBE (Methyl Tertiary Butyl Ether) | µg/kg": 12,
    "soil | p & m-Xylene | µg/kg": 12,
    "soil | Alpha-BHC (Benzene Hexachloride) | µg/kg": 3,
    "soil | Alachlor | µg/kg": 3,
    "soil | Bifenthrin | µg/kg": 3,
    "soil | Cyhalothrin (Lambda) | µg/kg": 3,
    "soil | Gamma-BHC (Lindane, gamma HCH) | µg/kg": 3,
    "soil | Omethoate | µg/kg": 3,
    "soil | 1,2,3-Trichlorobenzene | µg/kg": 3,
    "soil | 1,3,5-Trichlorobenzene | µg/kg": 3,
    "soil | 2,6-Dichlorobenzonitrile | µg/kg": 3,
    "soil | Dimethylvinphos | µg/kg": 3,
    "soil | Demeton-O | µg/kg": 3,
    "soil | Demeton-S | µg/kg": 3,
    "soil | Endrin Aldehyde | µg/kg": 3,
    "soil | Endrin Ketone | µg/kg": 3,
    "soil | Hexachlorobutadiene | µg/kg": 3,
    "soil | Phosphamidon (Sum) | µg/kg": 3,
    "soil | 1,2,4,5-Tetrachlorobenzene | µg/kg": 3,
    "soil | Cis-Permethrin | µg/kg": 3,
    "soil | Endosulfan sulfate | µg/kg": 3,
    "soil | Etrimfos | µg/kg": 3,
    "soil | Fenvalerate (Sum) | µg/kg": 3,
    "soil | Hexachlorobenzene | µg/kg": 3,
    "soil | Mevinphos, E+Z | µg/kg": 3,
    "soil | Pentachlorobenzene | µg/kg": 3,
    "soil | Pirimiphos-ethyl | µg/kg": 3,
    "soil | Propetamphos | µg/kg": 3,
    "soil | Tecnazene | µg/kg": 3,
    "soil | Trans-Permethrin | µg/kg": 3,
    "soil | Aldrin | µg/kg": 3,
    "soil | Azinphos-methyl | µg/kg": 3,
    "soil | Beta-BHC | µg/kg": 3,
    "soil | Cis-Chlordane | µg/kg": 3,
    "soil | Chlorfenvinphos | µg/kg": 3,
    "soil | Chlorpyrifos | µg/kg": 3,
    "soil | Chlorothalonil | µg/kg": 3,
    "soil | Carbophenothion | µg/kg": 3,
    "soil | Cyfluthrin (Sum) | µg/kg": 3,
    "soil | Delta-BHC | µg/kg": 3,
    "soil | Dieldrin | µg/kg": 3,
    "soil | Deltamethrin | µg/kg": 3,
    "soil | Heptachlor Exo-epoxide | µg/kg": 3,
    "soil | Endrin | µg/kg": 3,
    "soil | Endosulfan I (alpha isomer) | µg/kg": 3,
    "soil | Endosulfan II (beta isomer) | µg/kg": 3,
    "soil | Fenthion | µg/kg": 3,
    "soil | Isodrin | µg/kg": 3,
    "soil | Methacrifos | µg/kg": 3,
    "soil | O,p'-DDD | µg/kg": 3,
    "soil | O,p'-DDE | µg/kg": 3,
    "soil | O,p'-DDT | µg/kg": 3,
    "soil | Parathion | µg/kg": 3,
    "soil | Parathion-methyl | µg/kg": 3,
    "soil | Pendimethalin | µg/kg": 3,
    "soil | Phorate | µg/kg": 3,
    "soil | Phosalone | µg/kg": 3,
    "soil | P,p'-DDD | µg/kg": 3,
    "soil | P,p'-DDE | µg/kg": 3,
    "soil | P,p'-DDT | µg/kg": 3,
    "soil | P,p'-Methoxychlor | µg/kg": 3,
    "soil | Propyzamide | µg/kg": 3,
    "soil | Trans-Chlordane | µg/kg": 3,
    "soil | Cypermethrin (Sum) | µg/kg": 3,
    "soil | Dichlorvos | µg/kg": 3,
    "soil | Dimethoate | µg/kg": 3,
    "soil | Diazinon | µg/kg": 3,
    "soil | Ethion | µg/kg": 3,
    "soil | Fenitrothion | µg/kg": 3,
    "soil | Malathion | µg/kg": 3,
    "soil | Pirimiphos-methyl | µg/kg": 3,
    "soil | Trifluralin | µg/kg": 3,
    "soil | Azinphos-ethyl | µg/kg": 3
  },
  "limitations": [
    "Unmatched analytes are not passes.",
    "TPH combined C16-C35 bands require an explicit, approved aggregation rule; this smoke test does not create it.",
    "BaP surrogate method applicability is not inferred.",
    "Criteria supplied are historical source configuration, not approved current guidance.",
    "No risk conclusion follows automatically from exceedance or nondetection."
  ],
  "missing": [
    "Current approved final development levels and finished cover distribution",
    "Complete field chain of custody, duplicate/blank data and independent instrument calibration records",
    "Actual groundwater chemical results",
    "Regulator acceptance and any later completed verification"
  ]
}

LCRM1: England planning scope. Develop and update source–pathway–receptor linkages. Use preliminary, generic and detailed assessment proportionately. Generic screening exceedance alone does not establish unacceptable risk. Review scenario, matrix, exposure, chemistry, SOM and sampling coverage before interpreting a comparison.

LCRM2: For relevant linkages consider proportionate options, feasibility, objectives and alternatives. Targeted investigation must name the decision it resolves; do not prescribe blanket excavation from isolated exceedances.

LCRM3: A strategy is not completion evidence. Define performance objectives and applicable criteria, a verification plan with appropriate sampling/inspection and material records, contingencies for unexpected conditions, and a completion report supported by the implemented works. Numerical design requirements need competent selection.

TECH: Gas investigation and protection require specialist assessment against applicable BS8576, BS8485 and CIRIA guidance; radon is a separate BR211 question. Licensed clauses and numerical rules are not implemented. Do not assign final gas class or radon protection from maps alone. Groundwater assessment needs a migration model and compliance point; leachate is not groundwater. Waste classification, WAC, topsoil quality and concrete aggressivity are separate assessments.