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Paramount officials disclose Cr6 spike in air samples, press South Coast AQMD for follow-up
Summary
City staff and consultants reported a large spike of hexavalent chromium on Jan. 26 but said it did not meet AQMD’s three‑consecutive‑sample threshold; AQMD has issued Notices of Violation to some sites and an investigation remains open.
Paramount — City and contractor representatives told the City Council on Feb. 10 that air monitors in Paramount recorded a significant spike of hexavalent chromium (Cr6) late last month and that local staff are coordinating with the South Coast Air Quality Management District (AQMD).
Randall Baxter of Trinity Consultants, who gave the quarterly air‑monitoring update, said the Jan. 26 24‑hour sample measured an exceedance roughly 10 times the AQMD screening criterion. “That exceedance was 10 times the criteria,” Baxter said during the presentation. He explained that AQMD considers a pattern of three consecutive 24‑hour samples above 1 nanogram per sample to be evidence of elevated…
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