{"query":{"parameter":"silica","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","US"],"parameter_keys":["cas:7631-86-9","cas:68937-51-9","cas:68583-49-3","cas:67256-35-3","cas:68909-20-6","cas:7699-41-4"],"names_matched":[["silica","cas:7631-86-9"],["1 1 1 trimethyl n trimethylsilyl silanamine reaction products with ammonia octamethylcyclotetrasiloxane and silica","cas:68937-51-9"],["cyclotetrasiloxane octamethyl reaction products with silica","cas:68583-49-3"],["fumed silica","cas:67256-35-3"],["hydrolysis products of 1 1 1 trimethyl n trimethylsilyl silanamine with silica","cas:68909-20-6"],["silanamine 1 1 1 trimethyl n trimethylsilyl reaction products with ammonia octamethylcyclotetrasiloxane and silica","cas:68937-51-9"],["silica amorphous precipitate and gel","cas:7699-41-4"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"1d27b6acd0acf664","parameter":"Silica (crystalline, respirable)","value":"4300000","value_num":4300000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:7631-86-9","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"1a5ef42c4d355b9a","parameter":"Silica (crystalline, respirable)","value":"18000000","value_num":18000000,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:7631-86-9","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}}],"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":"US-MD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"silica\", 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":"US-MD"},"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"}]}