Final 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name:	San Diego Creek Reach 2
Water Body ID:	CAR8011100019990211130358
Water Body Type:	River & Stream


DECISION ID	7272

Pollutant:	Metals
Final Listing Decision:	Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2006)
Revision Status	Revised
Reason for Delisting:	State determines water quality standard is being met
Impairment from Pollutant or Pollution:	Pollutant

Weight of Evidence:	This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Eleven lines of evidence are available in the administrative record to assess this pollutant. None of the samples that were analyzed for arsenic, cadmium, nickel chromium, and zinc exceeded the standards. Five (5) samples analyzed for copper and one sample analyzed for lead exceeded the standards. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the section 303(d) list. 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. None of 31 samples for arsenic, none of one hundred fifteen samples for cadmium, none of one hundred fifteen samples for chromium, none of one hundred fifteen samples for nickel, and none of one hundred fifteen samples for zinc, five of two hundred thirty samples for copper, and one of two hundred thirty samples for lead exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.

SWRCB Board Decision / Staff Recommendation:	N/A

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 7272


LOE ID:	7585

Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	31
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 31 samples none exceeded the California Toxics Rule Standard for acute or chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	California Toxics Rule Acute Criteria Arsenic: 340 ppb. California Toxics Rule Chronic Criteria Arsenic: 150 ppb.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 8/21/05, 11/1/05, 2/1/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 11/8/02, 11/10/02, 2/11/03, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7723

Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples none exceeded the California Toxics Rule Standards for acute or chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 2.45 ug/l to 40.96 ug/l. The chronic criteria ranged from 1.53 ug/l to 10.45 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7724

Pollutant:	Chromium (total)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples none exceeded the California Toxics Rule Standard for acute or chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 361.14 ug/l to 2795.29 ug/l. The chronic criteria ranged from 117.15 ug/l to 987.37 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7725

Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples none exceeded the California Toxics Rule Standard for acute or chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 303.93 ug/l to 2748.17 ug/l. The chronic criteria ranged from 33.76 ug/l to 305.24 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7726

Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples none exceeded the California Toxics Rule Standard for acute or chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 76.01 ug/l to 689.63 ug/l. The chronic criteria ranged from 76.63 ug/l to 695.27 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7727

Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	1

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples 1 exceeded the California Toxics Rule Standard for acute toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 8.31 ug/l to 96.46 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7728

Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	4

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples 4 exceeded the California Toxics Rule Standard for chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR chronic criteria is hardness dependent and ranged from 5.79 ug/l to 53.51 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7729

Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	1

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples 1 exceeded the California Toxics Rule Standard for acute toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 1.43 ug/l to 126.01 ug/l. The CTR does not have a chronic toxicity standard that applies to silver.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	7730

Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	0

Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Of the 115 samples 0 exceeded the California Toxics Rule Standard for acute toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR acute criteria is hardness dependent and ranged from 36.88 ug/l to 569.17 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


LOE ID:	4431

Pollutant:	Metals
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Warm Freshwater Habitat

Number of Samples:	0
Number of Exceedances:	0

Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference:	Placeholder reference pre-2006 303(d)

Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)

Evaluation Guideline:	Unspecified
Guideline Reference:	Placeholder reference pre-2006 303(d)

Spatial Representation:	Unspecified
Temporal Representation:	Unspecified
Environmental Conditions:	Unspecified
QAPP Information:	Unspecified
QAPP Information Reference(s):


LOE ID:	7731

Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved

Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat

Number of Samples:	115
Number of Exceedances:	1

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 115 samples 1 exceeded the California Toxics Rule Standard for chronic toxicity.
Data Reference:	Program Effectiveness Assessment Section of the Unified Annual Progress Report for the period of time 2001-2007

Water Quality Objective/Criterion:	CTR chronic criteria is hardness dependent and ranged from 1.44 ug/l to 22.18 ug/l.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were collected at 4 locations as follows: San Diego Creek at Jefferson (SDJF05), san Diego Creek at Laguna Canyon Road (LCRF05), San Diego Creek at Sand Canyon (SSCF05), and West Yale Loop (WYLSED).
Temporal Representation:	The data evaluation period is October 2000 thorugh December 2006. The samples were collected at WYLSED during the dry weather on the following dates: 2/11/03, 7/14/04, 7/20/04, 8/24/04, 9/7/04, 9/29/04, 10/11/04, 11/16/04, 11/30/04, 3/2/05, 3/16/05, 4/5/05, 5/3/05, 5/10/05, 6/14/05, 6/28/05, 7/5/05, 7/12/05, 8/4/05, 8/8/05, 8/21/05, 9/6/05, 9/20/05, 10/5/05, 11/1/05, 11/29/05, 12/22/05, 12/28/05, 1/11/06, 2/1/06, 3/21/06, 4/17/06, 4/24/06, 5/1/06, 5/17/06, 6/13/06, 6/26/06. The samples were collected at LCRF05 during the dry weather on the following dates: 10/13/05, 7/13/06, 10/5/06. The samples were collected at SDJF05 during the dry weather on the following dates: 5/2/06, 7/14/06, 7/27/06, 8/2/06, 8/10/06, 8/22/06, 8/29/06. The samples were collected at SSCF05 during the dry weather on the following dates: 8/22/06, 10/11/06, 11/15/06, 12/7/06. The samples were collected at WYLSED during the wet weather on the following dates: 10/27/00, 10/29/00, 10/30/00, 1/8/01, 1/9/01, 1/10/01, 1/24/01, 1/25/01, 1/26/01, 3/6/01, 11/12/01, 11/14/01, 11/24/01, 11/25/01, 11/27/01, 11/30/01, 12/14/01, 12/16/01, 2/17/02, 2/18/02, 3/7/02, 3/8/02, 11/8/02, 11/10/02, 2/11/03, 1/2/04, 2/25/04, 2/26/04, 4/17/04, 4/19/04, 4/20/04, 10/26/04, 10/27/04, 10/28/04, 10/29/04, 10/30/04, 12/28/04,12/31/04, 1/1/05, 5/6/05, 5/7/05, 5/9/05, 10/17/05, 10/18/05, 2/27/06, 3/1/06, 3/3/06.
Environmental Conditions:	The samples were filtered in the field and collected during dry and wet weather. The analyses for the metals were done as total dissolved metals.
QAPP Information:	The data is in compliance with the NPDES Permit's Monitoring and Reporting Program Requirements which include Quality Assurance provisions.
QAPP Information Reference(s):


DECISION ID	13184

Pollutant:	Escherichia coli (E. Coli)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. One (1) line of evidence are available in the administrative record to assess this pollutant. Thirty (30) of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. 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. Thirty (30) of sixty-four (64) samples exceed the US EPA Recommended Ambient Water Quality Criteria for Bacteria -1986 and this exceeds 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.

RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that though this water body's E. coli data exceeds EPA's Recommended Criteria it is not appropriate at this time to list it as impaired. There is a Storm Water Quality Task Force working on determining the appropriate indicators and the appropriate criteria to protect body contact recreation in fresh waters. Listing this waterbody for E. coli would circumvent a much needed process that is currently underway. Regional Board staff actively participate in this process with the SWQTF and will recommend review of this data in the 2010 listing cycle by when the appropriate criteria and indicators will have been developed.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 13184


LOE ID:	21554

Pollutant:	Escherichia coli (E. Coli)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	64
Number of Exceedances:	30

Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Of the 64 samples collected, 30 exceeded EPA's Recommended single sample criteria.
Data Reference:	Orange County Coast Keeper Coastal Watersheds Project

Water Quality Objective/Criterion:	USEPA Recommended Ambient Water Quality Criteria for Bacteria -1986: E. coli: log mean less than 126 organisms/100 mL based on five or more samples per 30day period, and not more than 10% of the samples exceed 235 organisms/100mL for any 30 day period.
Objective/Criterion Reference:	Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	The samples were taken at three locations: sd1, sd2, and sd3. Sd1 - Bake Parkway: This site is located off of Irvine Center Drive on the right hand side before the Wild Rivers water park. Sd2 - 133 Fwy: The 133 Fwy is located off of Pacifica and Alton in the dead end down the ramp in the riverbed. This area is just downstream of SD1 Bake Parkway, yet has never been dry. Sd3 - Sand Canyon : The Sand Canyon site is located off of the 405 freeway at Sand Canyon avenue past Alton at the bridge on the northeast corner of Barranca and Sand Canyon avenue. There is a pullout with a chain gate.
Temporal Representation:	The samples were collected monthly starting on December 23, 2003, at Sd1 and Sd3, through June 21, 2004. Monthly samples were also collected at Sd2 starting on October 22, 2002 through June 21, 2004.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	The data's quality is deemed appropriate because it was obtained under the auspices of a QAPP approved by the Regional Board.
QAPP Information Reference(s):