COLUMBIA HELICOPTERS, INC. — NPDES permit OR0033391: limits, due date and EPA's record

NPDES permit OR0033391 · Minor NON-POTW · administratively continued, expires 2015-06-30 · EPA's file as of 2026-09-19

This permit expired on 2015-06-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (20)

Outfall	Parameter	Statistic	Limit	Months
001	pH	DAILY MN	>= 6.2 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	VALUE	<= 130 mg/L (alert)	all year
001	Oil & Grease	VALUE	<= 10 mg/L	all year
001	Copper, total [as Cu]	VALUE	<= .1 mg/L (alert)	all year
001	Lead, total [as Pb]	VALUE	<= .4 mg/L (alert)	all year
001	Zinc, total [as Zn]	VALUE	<= .6 mg/L (alert)	all year
001	Floating solids, waste or visible foam-visual	VALUE	<= 0 N=0;Y=1 (alert)	all year
001	Oil and grease visual	VALUE	report only (alert)	all year
002	pH	DAILY MN	report only	all year
002	pH	DAILY MX	report only	all year
002	1,2-Dichloroethane	VALUE	<= 5 ppb	all year
002	Tetrachloroethylene	VALUE	<= 5 ppb	all year
002	1,1-Dichloroethylene	VALUE	<= 7 ug/L	all year
002	1,1,1-Trichloroethane	VALUE	<= 200 ppb	all year
002	trans-1,2-Dichloroethylene	VALUE	<= 100 ppb	all year
002	Vinyl chloride	VALUE	<= 2 ppb	all year
002	Trichloroethylene	VALUE	<= 5 ppb	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	cis-1,2-Dichloroethene	VALUE	<= 70 ppb	all year