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otherwise, or where it is exceeded, a Tier II pathway-specific screening level or a site-specific assessment replaces it"],"cite":{"instrument":"ca_atl_rbca_tier1","title":"Atlantic RBCA Version 4.0 — Tier I Risk-Based Screening Level (RBSL) Tables 5a (soil) and 5b (groundwater), July 2021","issuer":"Atlantic Partnership in RBCA Implementation (Atlantic PIRI: the environment departments of Nova Scotia, New Brunswick, Newfoundland and Labrador and Prince Edward Island)","edition":"Atlantic RBCA Version 4.0, Appendix 3, updated July 2021 (tables dated July 21, 2021)","source_url":"https://atlanticrbca.com/wp-content/uploads/2023/03/ARBCA_V4_Tier_I_RBSL_and_Tier_II_PSSL_Tables_July_21_2021.pdf","source_sha256":"f29cd6f9586a6718012ecc27d1facf5f6ac0c951578da95c6b8dad8f80c2b13e","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Table 5a, Tier I Risk Based Screening Levels for Soil (mg/kg), Residential, potable groundwater, fine grained","page":2,"quote":null}},{"id":"edb6f7007d018e00","parameter":"Modified TPH (TPH-BTEX): Gasoline","value":"75","value_num":75,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"regional","parameter_key":"name:modified tph (tph-btex): gasoline","place":["CA-NS","CA-NB","CA-NL","CA-PE"],"conditions":["land use: Residential","groundwater use: Non-Potable","soil type: coarse grained","Tier I: applies only where the six mandatory criteria under the table are satisfied (a-f); 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