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DECISION ID |
7407 |
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| Pollutant: |
DDT (tissue) |
| Final Listing Decision: |
List on 303(d) list (being addressed by action other than TMDL) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Revised |
| Sources: |
Nonpoint Source | Point Source |
| Expected Attainment Date: |
2019 |
| Date TMDL Approved by USEPA: |
Port Hueneme Harbor includes several areas of contaminated sediments. The Oxnard Harbor District, the U.S. Navy, and the U.S. Army Corps of Engineers intend to dredge the Harbor to achieve necessary navigational depths and to remove all contaminated sediments. A final design has been developed and permitting for the project is in progress.
The draft final design dredging report proposes to address the contaminated sediment through dredging removal of those sediments. The draft final design report presents the design for a plan to dredge contaminated sediments within the Port of Hueneme, and placement and confinement of the sediments in a subaqueous confined aquatic disposal (CAD) facility. The evaluation considered sampling data from 1965 through 2008. The identified depth-to-clean to be achieved at all locations was calculated by determining the deepest elevations at which concentrations of DDT exceeded relevant risk based criteria. The risk based criteria for concentrations of DDT and its breakdown products were taken from a focused ecological risk assessment with bioaccumulation modeling. Sediments determined to have concentrations in excess of those criteria will be disposed of within the CAD facility. |
| Impairment from Pollutant or Pollution: |
Pollutant |
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| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 2.2 and 4.5 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Two lines of evidence is available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list (being addressed by actions other than TMDL section).
This conclusion is based on the staff findings that:
The draft final design dredging report which describes dredging to achieve required navigational depths and removal of contaminated sediments, is sufficient to eliminate the existing impairment in the Harbor. Removing sediments to depths below exceedances of any identified risk based criteria will eliminate sediment exceedances and eliminate potential for bioaccumulation and tissue contamination beyond criteria will not be maintained. |
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| RWQCB Board Decision / Staff Recommendation: |
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the Water Quality Limited Segments Being Addressed By Actions Other Than TMDL category of the section 303(d) list because the proposed sediment removal measures are expected to eliminate the impairment. |
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| SWRCB Board Decision / Staff Recommendation: |
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| USEPA Decision: |
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| LOE ID: |
28471 |
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| Pollutant: |
DDT |
| LOE Subgroup: |
Narrative Description Data |
| Matrix: |
Not Specified |
| Fraction: |
None |
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| Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
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| Number of Samples: |
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| Number of Exceedances: |
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| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
A Port Hueneme Harbor dredging project has been designed and proposed to remove underlying contaminated sediments from the harbor, and as a result eliminate the bioaccumulatory potential of the sediment and ongoing impact to the aquatic biota. |
| Data Reference: |
Draft Final (90 Percent) Design Report Sediment Dredging, Beach Renourishment, Confined Aquatic Disposal (CAD), and Capping Port Hueneme, California. Prepared for Oxnard Harbor District.
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Port Hueneme Harbor Master Dredging Permit application and attached documents to the Los Angeles Contaminated Sediments Task Force. |
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| Water Quality Objective/Criterion: |
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| Objective/Criterion Reference: |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
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| Temporal Representation: |
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| Environmental Conditions: |
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| QAPP Information: |
QA information unavailable. |
| QAPP Information Reference(s): |
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| LOE ID: |
4366 |
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| Pollutant: |
DDT (tissue) |
| LOE Subgroup: |
Pollutant-Tissue |
| Matrix: |
Tissue |
| Fraction: |
Not Recorded |
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| Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
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| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
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| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. |
| Data Reference: |
Placeholder reference pre-2006 303(d) |
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| Water Quality Objective/Criterion: |
Unspecified |
| Objective/Criterion Reference: |
Placeholder reference pre-2006 303(d) |
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| Evaluation Guideline: |
Unspecified |
| Guideline Reference: |
Placeholder reference pre-2006 303(d) |
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| Spatial Representation: |
Unspecified |
| Temporal Representation: |
Unspecified |
| Environmental Conditions: |
Unspecified |
| QAPP Information: |
Unspecified |
| QAPP Information Reference(s): |
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DECISION ID |
7408 |
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| Pollutant: |
PCBs (Polychlorinated biphenyls) (tissue) |
| Final Listing Decision: |
List on 303(d) list (being addressed by action other than TMDL) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Revised |
| Sources: |
Nonpoint Source | Point Source |
| Expected Attainment Date: |
2019 |
| Date TMDL Approved by USEPA: |
Port Hueneme Harbor includes several areas of contaminated sediments. The Oxnard Harbor District, the U.S. Navy, and the U.S. Army Corps of Engineers intend to dredge the Harbor to achieve necessary navigational depths and to remove all contaminated sediments. A final design has been developed and permitting for the project is in progress.
The draft final design dredging report proposes to address the contaminated sediment through dredging removal of those sediments. The draft final design report presents the design for a plan to dredge contaminated sediments within the Port of Hueneme, and placement and confinement of the sediments in a subaqueous confined aquatic disposal (CAD) facility. The evaluation considered sampling data from 1965 through 2008. The identified depth-to-clean to be achieved at all locations was calculated by determining the deepest elevations at which concentrations of DDT exceeded relevant risk based criteria. The risk based criteria for concentrations of DDT and its breakdown products were taken from a focused ecological risk assessment with bioaccumulation modeling. Sediments determined to have concentrations in excess of those criteria will be disposed of within the CAD facility. |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 2.2 and 4.5 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Two lines of evidence is available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list (being addressed by actions other than TMDL section).
This conclusion is based on the staff findings that:
The draft final design dredging report which describes dredging to achieve required navigational depths and removal of contaminated sediments, is sufficient to eliminate the existing impairment in the Harbor. Removing sediments to depths below exceedances of any identified risk based criteria will eliminate sediment exceedances and eliminate potential for bioaccumulation and tissue contamination beyond criteria will not be maintained. |
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| RWQCB Board Decision / Staff Recommendation: |
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the Water Quality Limited Segments Being Addressed By Actions Other Than TMDL category of the section 303(d) list because the proposed sediment removal measures are expected to eliminate the impairment. |
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| SWRCB Board Decision / Staff Recommendation: |
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| USEPA Decision: |
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Lines of Evidence (LOEs) for Decision ID 7408 |