{"query":{"parameter":"1 1 1 2 tetrachloroethane","place":"CA-NS","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-NS","CA"],"parameter_keys":["cas:630-20-6"],"names_matched":[["1 1 1 2 tetrachloroethane","cas:630-20-6"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":1,"offset":0,"returned":1,"next_offset":null,"rows":[{"id":"f13c9b81379b08a4","parameter":"1,1,1,2-Tetrachloroethane","value":"20","value_num":20,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:630-20-6","place":["CA-NS"],"conditions":["receiving_water is freshwater","a site's surface water, or groundwater within 10 m of a surface water body, assessed under the Contaminated Sites Regulations (Tier I: the generic standard; a Tier II pathway-specific standard or a site-specific risk assessment may replace it)"],"cite":{"instrument":"ca_ns_tier1_eqs_surface_water","title":"Nova Scotia Tier I Environmental Quality Standards (EQS) for Surface Water and Groundwater Discharging to Surface Water — Table 3, surface water columns","issuer":"Nova Scotia Environment and Climate Change (Contaminated Sites Regulations, Tier I EQS)","edition":"Revision September 30, 2021 (linked from the Contaminated Sites protocols page, fetched 2026-10-09)","source_url":"https://novascotia.ca/nse/contaminatedsites/docs/Table_3_-_Nova_Scotia_Tier_I_Environmental_Quality_Standards_EQS_for_Surface_Water_and_Groundwater_Discharging_to_Surface_Water.pdf","source_sha256":"cff66750079c1998ad86f5ad70089705f7824849c0b5a016eb5253447301a875","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Table 3, surface water, fresh water","page":3,"quote":null}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"CA-NS"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"1 1 1 2 tetrachloroethane\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"CA-NS"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}