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Industrial stormwater facility

Mission Ready Mix

3 42I017494 · Notice of Intent · Solvang, Santa Barbara

Official record — State Water Resources Control Board, Industrial General Permit

Official

Facility record

Facility name
Mission Ready Mix
WDID
3 42I017494
Application type
Notice of Intent
City
Solvang
County
Santa Barbara
ZIP
93463
Primary SIC code
3273
SIC description
Ready-Mixed Concrete
Date active
2002-09-11
Regional Water Board
Regional Board 3 - Central Coast Region

Hydrologic

Geographic context

Official facility coordinate plotted against the official 2026 impaired-water geometry.

Official facility point
34.59457, -120.15300
HUC12 subwatershed
Alisal Creek-Santa Ynez River
HUC12 code
180600100508
Impaired-water associations (derived)
1
Loading map…

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Subwatershed + nearby

1 waterbodies
Santa Ynez River (Cachuma Lake to below city of Lompoc)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Benthic Community Effects, Molybdenum, Oxygen, Dissolved, Sedimentation/Siltation, Sodium, Temperature, water +2 more

Distance 0.35 km

Confidence high

Fact sheet

Associations are calculated from official facility coordinates, USGS HUC12 boundaries, and official 2026 impaired-water geometry. They do not establish a discharge connection or causation.

TMDL requirements

Water Board-stated TMDL waste load allocations applied to this industrial permit in SMARTS.

Official record — SMARTS TMDL dataset, State Water Board

No SMARTS TMDL requirement is recorded for this WDID. In the statewide TMDL export only permits in Regions 4, 8 and 9 currently carry industrial TMDL requirements, so an absence here is not a statement that the facility discharges to an unimpaired water.

Official monitoring

SMARTS monitoring

Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.

Official record — SMARTS parameter data, State Water Board
Reported results
55
Sample events
13
Distinct parameters
6
Reporting years
2015 – 2024
First sample
2015-11-15
Latest sample
2025-03-05
Source regional dataset
Region 3 - Central Coast
Source retrieved
Aug 21, 2026

Official SMARTS public reports

Parameters reported

Reported results over time

Loading reported results…

Most recent reported results

Latest 25 of 55
Sample dateLocationParameterResultUnitsEvent
2025-03-05STORM WATER INLETIron< .08(non-detect / est.)mg/LQualifying Storm Event
2025-03-05STORM WATER INLETOil and Grease< 3(non-detect / est.)mg/LQualifying Storm Event
2025-03-05STORM WATER INLETpH6.2SUQualifying Storm Event
2025-03-05STORM WATER INLETTotal Suspended Solids (TSS)1mg/LQualifying Storm Event
2025-02-15STORM WATER INLETIron.61mg/LQualifying Storm Event
2025-02-15STORM WATER INLETOil and Grease< 3(non-detect / est.)mg/LQualifying Storm Event
2025-02-15STORM WATER INLETpH7.8SUQualifying Storm Event
2025-02-15STORM WATER INLETTotal Suspended Solids (TSS)68mg/LQualifying Storm Event
2023-01-09STORM WATER INLETIron1.71mg/LQualifying Storm Event
2023-01-09STORM WATER INLETIron1.61mg/LQualifying Storm Event
2023-01-09STORM WATER INLETOil and Grease4mg/LQualifying Storm Event
2023-01-09STORM WATER INLETOil and Grease< 3(non-detect / est.)mg/LQualifying Storm Event
2023-01-09STORM WATER INLETpH6.8SUQualifying Storm Event
2023-01-09STORM WATER INLETpH6.8SUQualifying Storm Event
2023-01-09STORM WATER INLETTotal Suspended Solids (TSS)35mg/LQualifying Storm Event
2023-01-09STORM WATER INLETTotal Suspended Solids (TSS)23mg/LQualifying Storm Event
2023-01-04STORM WATER INLETIron6.7mg/LQualifying Storm Event
2023-01-04STORM WATER INLETIron6.4mg/LQualifying Storm Event
2023-01-04STORM WATER INLETOil and Grease< 3(non-detect / est.)mg/LQualifying Storm Event
2023-01-04STORM WATER INLETOil and Grease< 3(non-detect / est.)mg/LQualifying Storm Event
2023-01-04STORM WATER INLETpH6.8SUQualifying Storm Event
2023-01-04STORM WATER INLETpH6.8SUQualifying Storm Event
2023-01-04STORM WATER INLETTotal Suspended Solids (TSS)98mg/LQualifying Storm Event
2023-01-04STORM WATER INLETTotal Suspended Solids (TSS)108mg/LQualifying Storm Event
2022-12-27STORM WATER INLETIron.98mg/LQualifying Storm Event

Monitoring rows are official self-reported SMARTS submissions, joined to this facility by WDID. California Stormwater Intelligence does not restate, correct, average or evaluate reported values, and no benchmark comparison or violation determination is made.

YDOS-derived

Numeric Action Level comparison

Reported SMARTS analytical results compared against the Numeric Action Levels of the Industrial General Permit version in effect for each reporting year (July 1 – June 30).

Derived
Reporting years evaluated
6
Years with an NAL exceedance
1
Most recent evaluated year
RY 2024
Ruleset
igp_nal_ruleset_v1 / igp_nal_v1
ParameterNAL typeCalculated valueNALResultSamples usedMethod

Iron, Total

iron_total

Annual0.305 mg/L1 mg/LAt or below NALAnnual average of 2 eligible result(s) compared with the annual NAL.0.3× threshold2 eligible1 non-detect as zeroarithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Oil and Grease

oil_grease

Instantaneous maximum0 samples above25 mg/LAt or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.2 eligible2 non-detect as zerocount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

pH

ph

Instantaneous maximum0 samples above6 – 9 pH unitsWithin NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL.2 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

Total Suspended Solids (TSS)

tss

Instantaneous maximum0 samples above400 mg/LAt or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.2 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

An NAL exceedance is a permit-defined condition that triggers Exceedance Response Actions under the Industrial General Permit. It is not a violation, an enforcement action, or a Water Board compliance determination. Annual values use the arithmetic average of eligible results with non-detects treated as zero; instantaneous maximum NALs (total suspended solids, oil and grease, pH) are exceeded when two or more eligible results in a reporting year fall outside the level. Rules transcribed from 2014-0057-DWQ as amended by 2015-0122-DWQ (effective 2015-07-01, superseded 2020-06-30); 2014-0057-DWQ as amended by 2018-0028-DWQ (effective 2020-07-01).

Provenance

Source & provenance

Source agency
California State Water Resources Control Board
Source dataset
Industrial General Permit — permitted facilities (statewide GIS layer)
WDID
3 42I017494
Source feature ID
10957
Application type
Notice of Intent
Regional board derivation
WDID region prefix
Geometry status
valid
Last successful facility import
Aug 21, 2026, 1:57 AM UTC

Official IGP permitted facilities feature layer