| Water Body Name: | Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south |
| Water Body ID: | CAC9011300020090525213500 |
| Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
127929 |
Region 9 |
Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south |
||
| Pollutant: | Indicator Bacteria |
| Final Listing Decision: | List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2018) |
| Revision Status | Revised |
| Sources: | A Source Unknown |
| Expected TMDL Completion Date: | 2033 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.2 and 3.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant for REC-1. Forty-two of the 427 samples exceed the GM threshold for Enterococci. Zero of 288 samples exceed the GM threshold for Fecal Coliform. Two lines of evidence are available in the administrative record to assess this pollutant for SHELL. Three hundred twenty-three out of 654 samples exceed the SHELL threshold for Total Coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of REC-1. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Forty-two of the 427 samples exceeded the Enterococci water quality threshold and zero of 288 samples exceeded the Fecal Coliform water quality threshold for the protection of REC-1, and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. Three hundred twenty-three out of 654 samples exceed the SHELL threshold for Total Coliform and this does exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL, the San Diego Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for SHELL has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed. The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
| State Board Review of Regional Board Conclusion and Recommendation: | The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only. |
| State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
| LOE ID: | 29714 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 108 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 975. From the 975 samples, 108 monthly geomeans were calculated with none exceeding the water contact recreation geomean water quality objective. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml;
Geomean: Fecal coliform density shall not exceed 200 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29713 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 975 | ||||
| Number of Exceedances: | 9 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 975 samples were collected. From the 975 samples, 9 exceeded the water contact recreation single sample maximum water quality objective for fecal coliform. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml;
Geomean: Fecal coliform density shall not exceed 200 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 31058 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 56 | ||||
| Number of Exceedances: | 0 | ||||
| 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 within the time period from January 1999 through December 2006.
A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective. |
||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Geomean: Fecal coliform density shall not exceed 200 per 100ml. over a 30 day period | ||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29731 | ||||
| Pollutant: | Indicator Bacteria | ||||
| LOE Subgroup: | Health Advisories | ||||
| Matrix: | -N/A | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 2555 | ||||
| Number of Exceedances: | 144 | ||||
| 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 144 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 | ||||
| SWAMP Data: | Non-SWAMP | ||||
| 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 Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Goff Island Beach, Treasure Island Beach, Aliso North, Aliso Middle, Aliso South, Camel Point, Table Rock, Laguna Lido, 9th Street/1000 Steps, and Three Arch Bay. The posting covers two 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 (County of Orange, 2004). | ||||
| QAPP Information Reference(s): | |||||
|
|||||
| LOE ID: | 30186 | ||||
| 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, Dana Point 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, Dana Point HSA, at Aliso Beach south' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Dana Point HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split. |
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| Data Reference: | Placeholder reference pre-2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| 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: | 29708 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 974 | ||||
| Number of Exceedances: | 68 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples collected for total coliform analysis was 974. Of the 974 samples, 68 exceeded the single sample maximum total coliform standard for shellfish harvesting. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| 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. | ||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29709 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 51 | ||||
| Number of Exceedances: | 23 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples was 974. From March 2002 through December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, 23 exceeded the single sample maximum objective for shellfish harvesting. 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: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| 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. | ||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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. Bacteria monitoring 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29711 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 51 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of samples 974 individual bacteria samples were collected. From March 2002 to December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, only one sample exceeded the water contact recreation single sample maximum water quality objective for total coliform. 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: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml;
Geomean: Total coliform density shall not exceed 1,000 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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. Bacteria monitoring 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29710 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 974 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 974 individual bacteria samples. From the 974 samples, two samples exceeded single sample maximum water quality objective for water contact recreation. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml;
Geomean: Total coliform density shall not exceed 1,000 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29712 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 108 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 974 individual bacteria samples and 108 monthly geomeans were calculated. From the 108 geomeans, , none exceeded the water contact recreation geomean water quality objective for total coliform. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml;
Geomean: Total coliform density shall not exceed 1,000 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 31055 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 56 | ||||
| Number of Exceedances: | 2 | ||||
| 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 within the time period from January 1999 through December 2006.
A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans 2 exceeded the geomean water quality objective. |
||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Geomean: Total coliform density shall not exceed 1,000 per 100ml. | ||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 219767 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 107 | ||||
| Number of Exceedances: | 39 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 39 of the 107 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 219934 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 427 | ||||
| Number of Exceedances: | 42 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 42 of the 427 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 220018 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 653 | ||||
| Number of Exceedances: | 28 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 28 of the 653 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 219884 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 288 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 0 of the 288 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 219888 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 654 | ||||
| Number of Exceedances: | 69 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 69 of the 654 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 220030 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 654 | ||||
| Number of Exceedances: | 323 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed data for Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south to determine beneficial use support and the results are as follows: 323 of the 654 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. | ||||
| Data Reference: | Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL. | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): S9 | ||||
| Temporal Representation: | The samples were collected between the days of 2010-08-31 and 2019-06-10 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP for the Orange County Beachwatch data | ||||
| QAPP Information Reference(s): | QAPP for the Orange County Beachwatch data for the 2020 Integrated Report. | ||||
|
|||||
| LOE ID: | 31060 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 56 | ||||
| Number of Exceedances: | 0 | ||||
| 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 within the time period from January 1999 through December 2006.
A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective. |
||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Geomean: Enterococcus density shall not exceed 35 per 100 ml. over a 30 day period | ||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29717 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 108 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 959 individual bacteria samples and 108 monthly geomeans were calculated. Of the 108 geomeans, only one exceeded the water contact objective for enterococcus. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml;
Geomean: Enterococcus density shall not exceed 35 per 100 ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29716 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 959 | ||||
| Number of Exceedances: | 48 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 959. From the 959 samples, 48 exceeded the single sample maximum objective for enterococcus. | ||||
| Data Reference: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml;
Geomean: Enterococcus density shall not exceed 35 per 100 ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29718 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 51 | ||||
| Number of Exceedances: | 15 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples collected was 959. Betweem March 2002 and December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, 15 exceeded the water contact recreation single sample maximum for enterococcus. 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: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml;
Geomean: Enterococcus density shall not exceed 35 per 100 ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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. Bacteria monitoring 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 Bacteria specific | ||||
|
|||||
| LOE ID: | 29715 | ||||
| Pollutant: | Fecal Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 50 | ||||
| Number of Exceedances: | 3 | ||||
| Data and Information Type: | PWS pathogen monitoring (ambient water) | ||||
| Data Used to Assess Water Quality: | Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 975. Between March 2002 and December 2007, 50 were correlated with storm events. From the 50 storm event samples, 3 exceeded the water contact recreation single sample maximum water quality objective for fecal coliform. 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: | Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report | ||||
| National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station | |||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml;
Geomean: Fecal coliform density shall not exceed 200 per 100ml. |
||||
| 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: | Samples were collected from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087. | ||||
| Temporal Representation: | Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. | ||||
| 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. Bacteria monitoring 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 Bacteria specific | ||||