CORESLAB STRUCTURES INC(OMAHA)

NPDES permit NE0124052 · Minor NON-POTW · administratively continued, expires 2025-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-12-31 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

18values over a limit
35required values missing, on 9 form(s)
69of 93 forms filed late

Last period with anything received: 2026-06-30. Most often over: Manganese, total [as Mn] (7), Iron, total [as Fe] (7), Solids, total dissolved [TDS] (4).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (79)

OutfallParameterStatisticLimitMonths
007pHMINIMUM >= 6.5 SU all year
007pHDAILY MX <= 8.5 SU all year
007Chloride [as Cl]MO AVG report only all year
007Chloride [as Cl]DAILY MX <= 250 mg/L all year
007Iron, total [as Fe]MO AVG report only all year
007Iron, total [as Fe]DAILY MX <= 12.85 mg/L all year
007Manganese, total [as Mn]MO AVG report only all year
007Manganese, total [as Mn]DAILY MX <= 2.45 mg/L all year
007Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Solids, total dissolved [TDS]MO AVG report only all year
007Solids, total dissolved [TDS]DAILY MX <= 617 mg/L all year
008pHMINIMUM >= 6.5 SU all year
008pHDAILY MX <= 8.5 SU all year
008Iron, total [as Fe]MO AVG report only all year
008Iron, total [as Fe]DAILY MX <= 12.85 mg/L all year
008Manganese, total [as Mn]MO AVG report only all year
008Manganese, total [as Mn]DAILY MX <= 2.45 mg/L all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Solids, total dissolved [TDS]MO AVG report only all year
008Solids, total dissolved [TDS]DAILY MX <= 617 mg/L all year
009pHMINIMUM >= 6.5 SU all year
009pHDAILY MX <= 8.5 SU all year
009Iron, total [as Fe]MO AVG report only all year
009Iron, total [as Fe]DAILY MX <= 12.85 mg/L all year
009Manganese, total [as Mn]MO AVG report only all year
009Manganese, total [as Mn]DAILY MX <= 2.45 mg/L all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Solids, total dissolved [TDS]MO AVG report only all year
009Solids, total dissolved [TDS]DAILY MX <= 617 mg/L all year
010pHMINIMUM >= 6.5 SU all year
010pHDAILY MX <= 8.5 SU all year
010Solids, total suspendedMO AVG report only all year
010Solids, total suspendedDAILY MX report only all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Solids, total dissolved [TDS]MO AVG report only all year
010Solids, total dissolved [TDS]DAILY MX <= 617 mg/L all year
011pHMINIMUM >= 6.5 SU all year
011pHDAILY MX <= 8.5 SU all year
011Iron, total [as Fe]MO AVG report only all year
011Iron, total [as Fe]DAILY MX <= 12.85 mg/L all year
011Manganese, total [as Mn]MO AVG report only all year
011Manganese, total [as Mn]DAILY MX <= 2.45 mg/L all year
011Flow, in conduit or thru treatment plantMO AVG report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
011Solids, total dissolved [TDS]MO AVG report only all year
011Solids, total dissolved [TDS]DAILY MX <= 617 mg/L all year
012Temperature, water deg. fahrenheitMO AVG report only all year
012Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
012ConductivityMO AVG report only all year
012ConductivityDAILY MX report only all year
012pHMINIMUM >= 6.5 SU all year
012pHDAILY MX <= 9 SU all year
012Solids, total suspendedMO AVG report only all year
012Solids, total suspendedDAILY MX report only all year
012Chloride [as Cl]MO AVG report only all year
012Chloride [as Cl]DAILY MX report only all year
012Sulfate, dissolved [as SO4]MO AVG report only all year
012Sulfate, dissolved [as SO4]DAILY MX report only all year
012Iron, total [as Fe]MO AVG report only all year
012Iron, total [as Fe]DAILY MX report only all year
012Manganese, total [as Mn]MO AVG report only all year
012Manganese, total [as Mn]DAILY MX report only all year
012Hydrocarbons, total gas chromatographMO AVG report only all year
012Hydrocarbons, total gas chromatographDAILY MX <= 10 mg/L all year
012Flow, in conduit or thru treatment plantMO AVG report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
RAWChloride [as Cl]DAILY MN report only all year
RAWChloride [as Cl]DAILY MX report only all year
RAWIron, total [as Fe]DAILY MN report only all year
RAWIron, total [as Fe]DAILY MX report only all year
RAWManganese, total [as Mn]DAILY MN report only all year
RAWManganese, total [as Mn]DAILY MX report only all year
RAWSolids, total dissolved [TDS]DAILY MN report only all year
RAWSolids, total dissolved [TDS]DAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states