Water Body Name: | Pacific Ocean Shoreline, Lower San Juan HSA, at North Beach Creek |
Water Body ID: | CAC9012000020090505154613 |
Water Body Type: | Coastal & Bay Shoreline |
Lines of Evidence (LOEs) for Decision ID 16869 |
LOE ID: | 29374 |
Pollutant: | Indicator Bacteria |
LOE Subgroup: | Health Advisories |
Matrix: | -N/A |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 2555 |
Number of Exceedances: | 2292 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | For the period from January 2000 to December 2006, there were and 2292 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards.
Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards. |
Data Reference: | County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006. |
Water Quality Objective/Criterion: | California Code of Regulations. Title 17, Section 7960.
(a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met. |
Objective/Criterion Reference: | California Code of Regulations, Title 17, Section 7960. |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Bacteriological monitoring samples were collected at North Beach, 250' North of San Juan Creek, San Juan Creek/Ocean Interface, 250' South of San Juan Creek, 1000' South of Outfall, 2000' South of Outfall, 3000' South of Outfall and 4000' South of Outfall. The posting covers 1.1 miles of beach shoreline. |
Temporal Representation: | The beach posting covers the time frame of January 2000 -December 2006. |
Environmental Conditions: | |
QAPP Information: | Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29372 |
Pollutant: | Fecal Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 10 |
Number of Exceedances: | 3 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 547 single samples were collected. Of the 547 samples, 10 were correlated with a storm event. Three out of the 10 samples exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. |
Data Reference: | National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station |
The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. | |
Water Quality Objective/Criterion: | Geomean: Fecal coliform density shall not exceed 200 per 100ml
Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; (SWRCB, 2005) |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.
Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29355 |
Pollutant: | Fecal Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 547 |
Number of Exceedances: | 57 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 547 single samples with 57 samples exceeding the single sample water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Fecal coliform density shall not exceed 200 per 100ml
Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; (SWRCB, 2005) |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29371 |
Pollutant: | Fecal Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 36 |
Number of Exceedances: | 13 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 547 single samples with 36 monthly geomeans calculated. Of the 36 geomeans 13 exceeded the geomean water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Fecal coliform density shall not exceed 200 per 100ml
Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; (SWRCB, 2005) |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
Lines of Evidence (LOEs) for Decision ID 16868 |
LOE ID: | 30310 |
Pollutant: | Indicator Bacteria |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Not Recorded |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 0 |
Number of Exceedances: | 0 |
Data and Information Type: | PATHOGEN MONITORING |
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Lower San Juan HSA' was split into smaller segments and each represents an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Lower San Juan HSA, at North Beach Creek' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Lower San Juan HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split. |
Data Reference: | Placeholder reference pre-2006 303(d) |
Water Quality Objective/Criterion: | Unspecified |
Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | |
Temporal Representation: | |
Environmental Conditions: | |
QAPP Information: | unspecified |
QAPP Information Reference(s): | |
| |
LOE ID: | 29353 |
Pollutant: | Enterococcus |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 36 |
Number of Exceedances: | 23 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples were collected and 36 monthly geomeans calculated. From the 36 geomeans, 23 exceeded the geomean water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Enterococcus density shall not exceed 35 per 100 ml.
Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29354 |
Pollutant: | Enterococcus |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 10 |
Number of Exceedances: | 7 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples were collected with 10 samples correlated with a storm event. From the 10 storm samples, seven exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. |
Data Reference: | National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station |
The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. | |
Water Quality Objective/Criterion: | Geomean: Enterococcus density shall not exceed 35 per 100 ml.
Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.
Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29374 |
Pollutant: | Indicator Bacteria |
LOE Subgroup: | Health Advisories |
Matrix: | -N/A |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 2555 |
Number of Exceedances: | 2292 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | For the period from January 2000 to December 2006, there were and 2292 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards.
Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards. |
Data Reference: | County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006. |
Water Quality Objective/Criterion: | California Code of Regulations. Title 17, Section 7960.
(a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met. |
Objective/Criterion Reference: | California Code of Regulations, Title 17, Section 7960. |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Bacteriological monitoring samples were collected at North Beach, 250' North of San Juan Creek, San Juan Creek/Ocean Interface, 250' South of San Juan Creek, 1000' South of Outfall, 2000' South of Outfall, 3000' South of Outfall and 4000' South of Outfall. The posting covers 1.1 miles of beach shoreline. |
Temporal Representation: | The beach posting covers the time frame of January 2000 -December 2006. |
Environmental Conditions: | |
QAPP Information: | Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29352 |
Pollutant: | Enterococcus |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 548 |
Number of Exceedances: | 102 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples were collected with 102 exceeding the single sample water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Enterococcus density shall not exceed 35 per 100 ml.
Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
Lines of Evidence (LOEs) for Decision ID 16870 |
LOE ID: | 29488 |
Pollutant: | Total Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 36 |
Number of Exceedances: | 10 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples with 36 monthly geomeans calculated. Of the 36 geomeans, 10 exceeded the geomean water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Total coliform density shall not exceed 1,000 per 100ml.
Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29328 |
Pollutant: | Total Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Shellfish Harvesting |
Number of Samples: | 548 |
Number of Exceedances: | 94 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples were collected with 94 samples exceeding the single sample water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29374 |
Pollutant: | Indicator Bacteria |
LOE Subgroup: | Health Advisories |
Matrix: | -N/A |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 2555 |
Number of Exceedances: | 2292 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | For the period from January 2000 to December 2006, there were and 2292 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards.
Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards. |
Data Reference: | County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006. |
Water Quality Objective/Criterion: | California Code of Regulations. Title 17, Section 7960.
(a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met. |
Objective/Criterion Reference: | California Code of Regulations, Title 17, Section 7960. |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Bacteriological monitoring samples were collected at North Beach, 250' North of San Juan Creek, San Juan Creek/Ocean Interface, 250' South of San Juan Creek, 1000' South of Outfall, 2000' South of Outfall, 3000' South of Outfall and 4000' South of Outfall. The posting covers 1.1 miles of beach shoreline. |
Temporal Representation: | The beach posting covers the time frame of January 2000 -December 2006. |
Environmental Conditions: | |
QAPP Information: | Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29327 |
Pollutant: | Total Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Shellfish Harvesting |
Number of Samples: | 10 |
Number of Exceedances: | 7 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples with 10 samples associated with a storm event. Of the 10 samples, seven exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. |
Data Reference: | National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station |
The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. | |
Water Quality Objective/Criterion: | From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.
Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 30310 |
Pollutant: | Indicator Bacteria |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Not Recorded |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 0 |
Number of Exceedances: | 0 |
Data and Information Type: | PATHOGEN MONITORING |
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Lower San Juan HSA' was split into smaller segments and each represents an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Lower San Juan HSA, at North Beach Creek' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Lower San Juan HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split. |
Data Reference: | Placeholder reference pre-2006 303(d) |
Water Quality Objective/Criterion: | Unspecified |
Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | |
Temporal Representation: | |
Environmental Conditions: | |
QAPP Information: | unspecified |
QAPP Information Reference(s): | |
| |
LOE ID: | 29498 |
Pollutant: | Total Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 10 |
Number of Exceedances: | 1 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples with 10 samples correlated with a storm event. Of the 10 samples only one exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. |
Data Reference: | National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station |
The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. | |
Water Quality Objective/Criterion: | Geomean: Total coliform density shall not exceed 1,000 per 100ml.
Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.
Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |
| |
LOE ID: | 29378 |
Pollutant: | Total Coliform |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 548 |
Number of Exceedances: | 16 |
Data and Information Type: | PWS pathogen monitoring (ambient water) |
Data Used to Assess Water Quality: | Beach monitoring data was collected by the County of Orange from January 2004 through December 2006. A total of 548 single samples with 16 samples exceeding the single sample water quality objective. |
Data Reference: | The National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permit, Coastal Storm Drain Outfall Program. Bacteria Shoreline Data. 2002 through 2007. |
Water Quality Objective/Criterion: | Geomean: Total coliform density shall not exceed 1,000 per 100ml.
Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005). |
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | There is one sampling location located at North Beach Creek, DSB5, in the Lower San Juan HSA. This is found at the Northern end of Doheny State Beach, Dana Point. Lat/Long: 33.46202/-117.68939. |
Temporal Representation: | Samples were collected at least once a week from January 2004 through December 2006. |
Environmental Conditions: | |
QAPP Information: | Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. |
QAPP Information Reference(s): | County of Orange. Quality Assurance/Quality Control Manual, February 2004. |