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

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name:	Escondido Creek
Water Body ID:	CAR9046200020011005134542
Water Body Type:	River & Stream

DECISION ID	5413
Pollutant:	Manganese
Final Listing Decision:	Do Not 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
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. Three lines of evidence are available in the administrative record to assess pollutant. Eleven of 27 samples exceed the water quality objective for manganese. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against 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. Eleven of 27 samples exceeded the secondary MCL for manganese and this exceeds the allowable frequency listed in Table 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 met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB 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.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5413

LOE ID:	3246
Pollutant:	Manganese
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	12
Number of Exceedances:	6
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Twelve water samples, six samples exceeding (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	The water quality objective for manganese in Escondido Creek is 0.05 milligrams/liter (mg/L) according to Basin Plan, Table 3-2 entitled, Water Quality Objectives. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Two stations at Escondido Creek ESC5, HBA 904.62 (33.08559 -117.15037) and ESC8, HBA 904.61(33.03393 -117.23565).
Temporal Representation:	Twelve samples collected from March through September of 2002.
Environmental Conditions:	Escondido Creek Watershed; Escondido Creek 904.61 and 904.62
QAPP Information:	SWAMP Quality Assurance Plan.
QAPP Information Reference(s):
LOE ID:	6240
Pollutant:	Manganese
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	8
Number of Exceedances:	2
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	Two out of eight samples exceeded the water quality objective. Samples were collected by the City of Escondido for monitoring of Escondido Creek. Samples were collected quarterly in 2003 through 2005.
Data Reference:	City of Escondido. 2007. baseline quarterly monitoring report for Calendar Years 1998-2006.
Water Quality Objective/Criterion:	From the Basin Plan, the manganese water quality objective for Escondido Creek is 0.05 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at 6 monitoring stations within Escondido Creek. Sample stations locations were Station 910, 912, 916, 917, 920, and 923. Stations 912 and 916 were grouped as one station due to close proximity.
Temporal Representation:	Samples were collected quarterly in 2003 through 2005.
Environmental Conditions:	Samples were collected during dry weather.
QAPP Information:	Samples were collected and analyzed in compliance with the City of Escondido's Quality Assurance Program 2009.
QAPP Information Reference(s):	City of Escondido, 2009. Quality Assurance Program, City of Escondido Water Quality Lab. Janurary 2009.
LOE ID:	8884
Pollutant:	Manganese
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	3
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:	Seven water samples were collected at Escondido Creek 5 Station 904CBESC5 and Escondido Creek 8 Station 904CBESC8 on March, April, June and September 2002. Three of the seven samples exceed the secondard drinking water standard for manganese according to results in California's Surface Water Ambient Monitoring Program Report, 2007. Samples were collected in March, April, June and September 2002.
Data Reference:	Monitoring data for Region 9
Water Quality Objective/Criterion:	The secondary drinking water standard for manganese is 0.05 mg/l (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Water samples were collected at Escondido Creek 5 Station 904CBESC8; (Latitude 33.0861, Longitude -117.1449) and Escondido Creek 8 Station 904CBESC8; (Latitude 33.0348, Longitude -117.2363).
Temporal Representation:	Samples were collected in March, April, June and September 2002.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.

DECISION ID	5324
Pollutant:	Phosphate
Final Listing Decision:	Do Not 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. One hundred and twenty-nine of the 342 samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against 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. One hundred and twenty-nine of the 342 samples exceeded the basin plan water quality goal and this exceeds the allowable frequency calculated by the BinomBal program. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5324

LOE ID:	6258
Pollutant:	Phosphorus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	326
Number of Exceedances:	117
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	One hundred seventeen samples out of 326 exceed the water quality objective. Samples were collected by the City of Escondido for monitoring of Escondido Creek. Samples were collected quarterly in 1998 through 2005.
Data Reference:	City of Escondido. 2007. baseline quarterly monitoring report for Calendar Years 1998-2006.
Water Quality Objective/Criterion:	From the Basin Plan, water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. From the Basin Plan, “A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board” (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:	Water Quality Control Plan for the San Diego Basin (9).
Spatial Representation:	Samples were collected at 15 monitoring stations within Escondido Creek. Sample stations locations were Station 907, 908, 909, 910, 911, 912, 913, 916, 917, 920, 922, 923, 924, and 925. Stations 912 and 916 were grouped as one station due to close proximity.
Temporal Representation:	Samples were collected quarterly in 1999 through 2006.
Environmental Conditions:	Samples were collected during dry and wet weather.
QAPP Information:	Quality assurance conducted according to the City of Escondido's quality assurance manual.
QAPP Information Reference(s):
LOE ID:	8887
Pollutant:	Phosphorus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	6
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:	Water samples were collected at Escondido Creek station 5 904CBESC5 and Escondido Creek station 8 904CBESC8 in March, April, June and September 2002, all three showed excessive phosphorus concentrations according to results in California's Surface Water Ambient Monitoring Program Report, 2007. Samples were collected on March, April, June and September 2002.
Data Reference:	Monitoring data for Region 9
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters-streams and other flowing waters, with all beneficial uses, the water quality objective for total phosphorus is 0.1 mg/L (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek station 904CBESC5; (Latitude 33.0863, Longitude -117.1450) and Escondido Creek station 8 904CBESC8; (Latitude 33.03492, Longitude -117.2363)
Temporal Representation:	Samples were collected on March, April, June and September 2002.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.
LOE ID:	3245
Pollutant:	Phosphate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	6
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Eight water samples, six samples exceeding (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	Water Quality Control Plan for the San Diego Basin; 0.1 mg/l in stream and flowing waters.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Two stations at Escondido Creek ESC5, HBA 904.62 (33.08559 -117.15037) and at ESC8, HBA 904.61 (33.03393 -117.23565).
Temporal Representation:	Eight samples collected from March through September of 2002.
Environmental Conditions:	Escondido Creek Watershed; Escondido Creek 904.61 and 904.62.
QAPP Information:	SWAMP Quality Assurance Plan.
QAPP Information Reference(s):

DECISION ID	5642
Pollutant:	Total Dissolved Solids
Final Listing Decision:	Do Not 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	Based on the readily available data and information, the weight of evidence indicates that there is insufficient 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. The 348 of 354 samples exceeded the Basin Plan criteria, and these 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.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5642

LOE ID:	3217
Pollutant:	Total Dissolved Solids
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was in exceedance.
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for TDS is 500 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):
LOE ID:	3216
Pollutant:	Total Dissolved Solids
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was in exceedance.
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for TDS is 500 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek below Harmony Grove Bridge.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):
LOE ID:	6250
Pollutant:	Total Dissolved Solids
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	354
Number of Exceedances:	348
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	Three hundred fifty four sample out of 348 exceed the water quality objective. Samples were collected by the City of Escondido for monitoring of Escondido Creek. Samples were collected 1998 through 2005.
Data Reference:	City of Escondido. 2007. baseline quarterly monitoring report for Calendar Years 1998-2006.
Water Quality Objective/Criterion:	From the Basin Plan, the total dissolved solids water quality objective for Escondido Creek is 500 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at 14 monitoring stations within Escondido Creek. Sample stations locations were Station 907, 908, 909, 910, 911, 912, 913, 916, 917, 920, 922, 923, 924, and 925. Stations 912 and 916 were grouped as one station due to close proximity.
Temporal Representation:	Samples were collected quarterly in 1998 through 2005.
Environmental Conditions:	Samples were collected during dry and wet weather.
QAPP Information:	Quality control for the water chemisty was conducted in accordance with the City of Escondido's NPDES monitoring program.
QAPP Information Reference(s):	City of Escondido, 2009. Quality Assurance Program, City of Escondido Water Quality Lab. Janurary 2009.
LOE ID:	3218
Pollutant:	Total Dissolved Solids
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	3
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998 to 2000. Three of 5 samples were in exceedance.
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for TDS is 500 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November each year from 05/1998 to 11/2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):

DECISION ID	17894
Pollutant:	Benthic Community Effects
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:	Pollution
Weight of Evidence:	Benthic Community Effects is being considered for placement on the section 303(d) list under sections 3.9 and 3.2 of the Listing Policy. Under section 3.9, an additional line of evidence associating the Benthic Community Effects with a water or sediment concentration of pollutants is necessary to assess listing status. One line of evidence is available in the administrative record to assess this indicator. 52 of 52 samples exceeded the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing Benthic Community Effects in this water segment 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. 52 of 52 samples exceeded the Index of Biological Integrity (IBI) value of "poor" water quality for this area and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy, however as required under section 3.9 of the Listing Policy, pollutant(s) could not be directly associated with the Benthic Community Effects. 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 the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 17894

LOE ID:	26384
Pollutant:	Benthic Community Effects
LOE Subgroup:	Adverse Biological Responses
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	17
Number of Exceedances:	17
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Seventeen samples of IBI data were taken from May 1998 to 2007 at four sampling sites. All 17 samples exceeded the IBI impairment threshold.
Data Reference:	Fish and Game IBI Data
	Southern California Postfire Study. IBI. 2007.
Water Quality Objective/Criterion:	From the San Diego Basin Plan the objective is: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:	The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9)
Guideline Reference:	"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.
Spatial Representation:	Samples were collected at four sites: 904ECEFxx, 904ECHRBx, 904ECRSFR, and 904ECHGxx on Escondido Creek.
Temporal Representation:	Sampling occurred during one to three events from May 1998 to 2007.
Environmental Conditions:
QAPP Information:	Quality Control for collection and identification was conducted in accordance with the Quality Assurance Project Plan for the California Stream Bioassessment Procedure and the State of California, California Monitoring an Assessment Program: "CMAP", Quality Assurance Project Plan.
QAPP Information Reference(s):	State of California, California Monitoring and Assessment Program: "CMAP".
	Quality Assurance Project Plan for the California Stream Bioassessment Procedure
	The San Diego Stream Team Quality Assurance Project Plan
LOE ID:	26718
Pollutant:	Benthic Community Effects
LOE Subgroup:	Adverse Biological Responses
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	35
Number of Exceedances:	35
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Thirty five samples of IBI data were taken from May 2001 to May 2007 at five sampling sites. All 35 of the samples exceeded the IBI impairment threshold.
Data Reference:	Stream Bioassessment Data. Co-permitee Data. Collected 2002-2007.
Water Quality Objective/Criterion:	From the San Diego Basin Plan the objective is: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:	The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9)
Guideline Reference:	"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.
Spatial Representation:	Samples were collected at five sites: ESC-CC, ESC-EF, ESC-HRB, ESC-RSFR, and ESC-VC on Escondido Creek.
Temporal Representation:	Sampling occurred during May and October for a period of seven years from May 2001 to May 2007.
Environmental Conditions:
QAPP Information:	Quality Control for collection and identification was conducted in accordance with the Quality Assurance Manual for Freshwater Bioassessment.
QAPP Information Reference(s):	QUALITY ASSURANCE MANUAL FOR FRESHWATER BIOASSESSMENT Revision 0

DECISION ID	5414
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:	List on 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 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. Five out of the 8 samples exceed the California Toxic Rule: Human Health-FW (water & organisms) criterion of 0.00059 mg/L. 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. Five of 8 samples exceeded the CTR criterion and this exceeds the allowable frequency listed in Table 3.1 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 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.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB 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.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5414

LOE ID:	6231
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	Data reviewed was from the City of Escondido's Live Stream Discharge monitoring of Escondido Creek. Quarterly sample occurred between 2004 and 2005. Six samples were collected and analyzed for pesticides however the detection limits were less than 5.0 ug/liter. Well above the CTR criteria.
Data Reference:	City of Escondido. 2007. baseline quarterly monitoring report for Calendar Years 1998-2006.
Water Quality Objective/Criterion:	From the CTR, the DDT criterion for protection of human health is 0.00059 ug/L (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at 3 monitoring stations within Escondido Creek. Sample stations locations were Station 912, 916, and 917. Stations 912 and 916 were grouped as one station due to close proximity.
Temporal Representation:	Samples were collected quarterly in 2004 and 2005
Environmental Conditions:	Samples were collected during dry weather.
QAPP Information:	Quality control for the toxicity portion of this study was conducted in accordance with the City of Escondido's NPDES monitoring program.
QAPP Information Reference(s):
LOE ID:	3247
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	5
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Eight total samples taken at two stations, a total of five samples from two sampling stations exceeded the CTR criteria (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	San Diego RWQCB Basin Plan: No individual pesticide or combination of pesticides shall be present in the water column, sediments, or biota at concentration(s) that adversely affect beneficial uses. California Toxic Rule: Human Health-FW (water & organisms) .00059 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Two Escondido Creek stations located at 33.03393 -117.23565 and at 33.08559 -117.15037.
Temporal Representation:	Eight samples collected from March through September of 2002.
Environmental Conditions:	Escondido Creek Watershed; Escondido Creek 904.61.
QAPP Information:	SWAMP Quality Assurance Plan.
QAPP Information Reference(s):

DECISION ID	16460
Pollutant:	Enterococcus
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
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 line of evidence is available in the administrative record to assess this pollutant. Fifteen of the 15 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. Fifteen of 15 samples exceed the Basin Plan Enterococcus objective 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 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.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16460

LOE ID:	7364
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	15
Number of Exceedances:	15
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	All fifteen samples collected exceed the water quality objective according to results in the San Diego County Municipal Copermittees Annual Monitoring Report, 2007. Samples were collected one to three times a year from 2001 - 2006.
Data Reference:	Urban Runoff Monitoring, Volume 1- Final Report.
Water Quality Objective/Criterion:	From the Basin Plan, the limit for enterococcus sets a maximum at 61 colonies per 100mL (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at the mass loading station located near the lower boundary of the watershed under the Camino Del Norte Bridge east of Rancho Santa Fe Road along a natural channel in Encinitas.
Temporal Representation:	Samples were collected one to three times a year from 2001 - 2006.
Environmental Conditions:	Samples were collected during wet weather.
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the City of San Diego's quality assurance program.
QAPP Information Reference(s):	Water Quality Laboratory. Quality Assurance Manual.

DECISION ID	16461
Pollutant:	Fecal Coliform
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
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 line of evidence is available in the administrative record to assess this pollutant. Fifteen of the 15 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. Fifteen of 15 samples exceed the Basin Plan objective for Fecal Coliform 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 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.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16461

LOE ID:	7365
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	15
Number of Exceedances:	15
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	All fifteen samples collected exceed the water quality objective according to results in the San Diego County Municipal Copermittees Annual Monitoring Report, 2007. Samples were collected one to three times a year from 2001 - 2006.
Data Reference:	Urban Runoff Monitoring, Volume 1- Final Report.
Water Quality Objective/Criterion:	From the Basin Plan, no more than 10% of the samples during any 30-day period for waters designated for contact recreation shall exceed 400 colonies per 100 ml (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:	Water Quality Control Plan for the San Diego Basin (9).
Spatial Representation:	Samples were collected at the mass loading station located near the lower boundary of the watershed under the Camino Del Norte Bridge east of Rancho Santa Fe Road along a natural channel in Encinitas.
Temporal Representation:	Samples were collected one to three times a year from 2001 - 2006.
Environmental Conditions:	Samples were collected during wet weather.
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the City of San Diego's quality assurance program.
QAPP Information Reference(s):	Water Quality Laboratory. Quality Assurance Manual.

DECISION ID	5711
Pollutant:	Selenium
Final Listing Decision:	List on 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Eight out of the 31 samples exceeded water quality objective for Se. 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. Eight of 31 samples exceeded the CTR freshwater criterion and this exceeds the allowable frequency listed in Table 3.1 on 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 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.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB 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.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5711

LOE ID:	3231
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	12
Number of Exceedances:	8
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Twelve water samples, eight samples exceeding (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	CTR Freshwater Chronic (CCC) 5 mg/l.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Two stations at Escondido Creek ESC5, HBA 904.62 (33.08559 -117.15037) and ESC8, HBA 904.61 (33.03393 -117.23565).
Temporal Representation:	Twelve samples collected from March through September of 2002.
Environmental Conditions:	Escondido Creek Watershed; Escondido Creek 904.61 and 904.62
QAPP Information:	SWAMP Quality Assurance Plan.
QAPP Information Reference(s):
LOE ID:	6246
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	18
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	None of the 18 samples exceeded the water quality objective. Samples were collected by the City of Escondido for monitoring of Escondido Creek. Samples were collected quarterly in 2003 through 2005.
Data Reference:	City of Escondido. 2007. baseline quarterly monitoring report for Calendar Years 1998-2006.
Water Quality Objective/Criterion:	From the Basin Plan, the selenium water quality objective is 0.05 mg/L (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at 5 monitoring stations within Escondido Creek. Sample stations locations were Station 910, 912, 916, 917, and 923. Stations 912 and 916 were grouped as one station due to close proximity.
Temporal Representation:	Samples were collected quarterly in 2003 through 2005
Environmental Conditions:	Samples were collected during dry weather.
QAPP Information:	Samples were collected and analyzed in compliance with the City of Escondido's Quality Assurance Program 2009.
QAPP Information Reference(s):	City of Escondido, 2009. Quality Assurance Program, City of Escondido Water Quality Lab. Janurary 2009.
LOE ID:	3230
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was not in exceedance (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for selenium is 0.05 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5781
Pollutant:	Sulfates
Final Listing Decision:	List on 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
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
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. Two lines of evidence are available in the administrative record to assess this pollutant. The eight of nine samples exceed the water quality objective for sulfate. 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. Eight of nine samples exceed the drinking water secondary MCL for sulfate 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 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.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB 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.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5781

LOE ID:	3243
Pollutant:	Sulfates
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	4
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998 to 2000. Four of 5 samples were in exceedance (S.D. Department of Water Resources, 2000).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for sulfate is 250 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November each year from 05/1998 to 05/2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):
LOE ID:	3244
Pollutant:	Sulfates
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	4
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Four water samples, four samples exceeding (SWAMP, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	The recommended secondary drinking water standard for sulfate is 250 mg/l with an upper limit of 500 (Basin Plan).
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	One station at Escondido Creek: 33.03393 -117.23565.
Temporal Representation:	Four samples were collected from March through September of 2002.
Environmental Conditions:	Escondido Creek Watershed; Escondido Creek 904.61.
QAPP Information:	SWAMP Quality Assurance Plan.
QAPP Information Reference(s):

DECISION ID	16707
Pollutant:	Total Nitrogen as N
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
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. Three lines of evidence are available in the administrative record to assess this pollutant. Twenty-four of the 24 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. Twenty-four of the 24 samples exceed the Basin Plab objective 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 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.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16707

LOE ID:	7366
Pollutant:	Total Nitrogen as N
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	15
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	All fifteen samples collected exceed the water quality objective according to results in the San Diego County Municipal Copermittees Annual Progress Report, 2007. Samples were collected one to three times a year from 2001 - 2006.
Data Reference:	Urban Runoff Monitoring, Volume 1- Final Report.
Water Quality Objective/Criterion:	From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (RWQCB, 2007). A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total phosphorus, P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:	Water Quality Control Plan for the San Diego Basin (9).
Spatial Representation:	Samples were collected at the mass loading station located near the lower boundary of the watershed under the Camino Del Norte Bridge east of Rancho Santa Fe Road along a natural channel in Encinitas.
Temporal Representation:	Samples were collected one to three times a year from 2001 - 2006.
Environmental Conditions:	Samples were collected during wet weather.
QAPP Information:	Quality control of sample collection conducted under Weston Solution's Quality Management Manual 2004.
QAPP Information Reference(s):	Weston Solutions, 2004. Quality Management Manual. March 2004.
LOE ID:	7369
Pollutant:	Total Nitrogen as N
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	One sample was collected and it exceeds the water quality objective. The report was submitted to the San Diego Regional Water Quality Control Board Report in June 2006 as part of the Surface Ambient Monitoring Program. The sample was collected on June 13, 2006.
Data Reference:	Monitoring data for Region 9
Water Quality Objective/Criterion:	Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total phosphorus, P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:	Water Quality Control Plan for the San Diego Basin (9).
Spatial Representation:	Samples were collected at the monitoring station Escondido Creek 5 (station id: 904CBESC5 lat/long: 33.008651/-117.14506), located on the main stem of Escondido Creek.
Temporal Representation:	The sample was collected on June 13, 2006.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.
LOE ID:	7368
Pollutant:	Total Nitrogen as N
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	8
Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	All eight samples exceed the water quality objective according to results in the Surface Water Ambient Monitoring Program Report, 2007. Samples were collected on March 13 and 14, April 24, June 4 and September 17 and 18, 2002.
Data Reference:	Urban Runoff Monitoring, Volume 1- Final Report.
Water Quality Objective/Criterion:	Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total phosphorus, P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used (RWQCB, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:
Guideline Reference:	Water Quality Control Plan for the San Diego Basin (9).
Spatial Representation:	Samples were collected at monitoring station, Escondido Creek 5 (station id:904CBESC5, latitude 33.08651, longitude -117.14507) and Escondido Creek 8 (904CBESC8, latitude 33.03492, longitude -117.23632) located on the main stem of Escondido Creek.
Temporal Representation:	Samples were collected on March 13 and 14, April 24, June 4 and September 17 and 18, 2002.
Environmental Conditions:	The first two samples were taken during minimum and declining base flow respectively. The last two samples were taken during wet weather, between storm events and high base flow respectively.
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.

DECISION ID	16459
Pollutant:	Toxicity
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Unknown Nonpoint Source | Unknown Point Source | Urban Runoff/Storm Sewers
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Six of the 31 samples exceed the water quality objective for toxicity. 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. Six of 31 samples exceed the toxicity water quality objective and this exceeds the allowable frequency listed in Table 3.1 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 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.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16459

LOE ID:	7486
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	2
Data and Information Type:	Ambient toxicity testing (chronic)
Data Used to Assess Water Quality:	Selenastrum: None of the 15 samples were found to exhibit toxicity. Hyalella azteca: None of the 15 samples were found to exhibit toxicity. Ceriodaphnia dubia- Two of fifteen samples were found to be toxic as determined by the Ceriodaphnia dubia survival/reproductive test according to results in the San Diego County Municipal Copermittees Annual Progress Report, 2007. The samples were collected from November 2001 through March 2006.
Data Reference:	Urban Runoff Monitoring, Volume 1- Final Report.
Water Quality Objective/Criterion:	From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic lifE.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:	Samples were found to exhibit toxicity when the No Observed Effect Concentration (NOEC) or median lethal concentration (LC50) for any given species was estimated to be less than 100% of the test sample concentration (San Diego Water Board, 2007).
Guideline Reference:	Waste Discharge Requirements for Discharges of Urban Runoff From the Municipal Separate Storm Sewer Systems Draining the Watersheds of the County of San Diego, the Incorporated Cities of San Diego, the San Diego Unified Port District, and the San Diego County Regional Airport. Order No. R9-2007-0001.
Spatial Representation:	Samples were collected at the mass loading station in Escondido Creek east of Rancho Santa Fe rd and under the Camino del Norte bridge.
Temporal Representation:	The samples were collected from November 2001 through March 2006.
Environmental Conditions:
QAPP Information:	Quality control for project was conducted under Weston's quality control plan.
QAPP Information Reference(s):	Weston Solutions, 2004. Quality Management Manual. March 2004.
LOE ID:	26480
Pollutant:	Sediment Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	3
Data and Information Type:	Ambient toxicity testing (chronic)
Data Used to Assess Water Quality:	A total of eight samples were analyzed for toxicity. Four samples each were collected at Escondido Creek 5 and Escondido Creek 8. Hyalella azteca- Three of the eight samples exhibited sediment toxicity. Samples were collected in March, April, June and May of 2002 as part of California's Surface Water Ambient Monitoring Program.
Data Reference:	Monitoring data for Region 9
Water Quality Objective/Criterion:	Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. Samples were found to exhibit toxicity when the No Observed Effect Concentration (NOEC) or median lethal concentration (LC50) for any given species was estimated to be less than 100% of the test sample concentration (San Diego Water Board, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:	Samples were found to exhibit toxicity when the No Observed Effect Concentration (NOEC) or median lethal concentration (LC50) for any given species was estimated to be less than 100% of the test sample concentration.
Guideline Reference:	Waste Discharge Requirements for Discharges of Urban Runoff From the Municipal Separate Storm Sewer Systems Draining the Watersheds of the County of San Diego, the Incorporated Cities of San Diego, the San Diego Unified Port District, and the San Diego County Regional Airport. Order No. R9-2007-0001.
Spatial Representation:	Samples were collected at the monitoring station Escondido Creek 5 (904CBESC5 latitude; 33.0865, longitude -117.14507) and 904CBESC8, latitude: 33.03492, longitude -117.23632 located on the main stem of Escondido Creek.
Temporal Representation:	The samples were collected in March, April, June, and September 2002.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.
LOE ID:	25804
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	8
Number of Exceedances:	1
Data and Information Type:	Ambient toxicity testing (chronic)
Data Used to Assess Water Quality:	A total of eight samples were analyzed for toxicity. Four samples each were collected at Escondido Creek 5 and Escondido Creek 8. Selenastrum capricornutum- None of the eight samples exhibited toxicity by the Selenastrum capricornutum growth test. Ceriodaphnia dubia- One out of the eight samples collected exhibited toxicity to the Ceriodaphnia dubia survival/reproductive test. Samples were collected as part of California's Surface Water Ambient Monitoring Program. The samples were collected in March, April, June and May of 2002.
Data Reference:	Monitoring data for Region 9
Water Quality Objective/Criterion:	Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. Samples were found to exhibit toxicity when the No Observed Effect Concentration (NOEC) or median lethal concentration (LC50) for any given species was estimated to be less than 100% of the test sample concentration (San Diego Water Board, 2007).
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin (9).
Evaluation Guideline:	Samples were found to exhibit toxicity when the No Observed Effect Concentration (NOEC) or median lethal concentration (LC50) for any given species was estimated to be less than 100% of the test sample concentration.
Guideline Reference:	Waste Discharge Requirements for Discharges of Urban Runoff From the Municipal Separate Storm Sewer Systems Draining the Watersheds of the County of San Diego, the Incorporated Cities of San Diego, the San Diego Unified Port District, and the San Diego County Regional Airport. Order No. R9-2007-0001.
Spatial Representation:	Samples were collected at the monitoring station Escondido Creek 5 (904CBESC5 latitude; 33.0865, longitude -117.14507) and 904CBESC8, latitude: 33.03492, longitude -117.23632 located on the main stem of Escondido Creek.
Temporal Representation:	The samples were collected in March, April, June, and September 2002.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):	2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA.

DECISION ID	5675
Pollutant:	Antimony
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5675

LOE ID:	3222
Pollutant:	Antimony
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for antimony is 0.006 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5676
Pollutant:	Arsenic
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5676

LOE ID:	3223
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and was in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for Arsenic is 0.05 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	One sample was collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5734
Pollutant:	Benthic-Macroinvertebrate Bioassessments
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollution
Weight of Evidence:	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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that the four lines of evidence in the record to assess this pollutant consists of bioassessment data. This information on its own is insufficient to determine with the confidence and power required by the Listing Policy since this data is not associated with water or sediment concentrations of pollutants (Policy Section 3.9).
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5734

LOE ID:	3236
Pollutant:	Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:	Population/Community Degradation
Matrix:	Not Specified
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Data were collected in 1998 and 1999 for the San Diego Regional Water Quality Control Board 1999 Biological Assessment Annual Report. Physical habitat quality scores for location EC-EF ranged from 112-150, moderate-higher scores compared to other sampled waterbodies. BMI scores showed locatin EC-EF to be near average compared to other waterbodies sampled. (SDRWQCB, 1999-A).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:
Objective/Criterion Reference:
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek, 5 riffles downstream of Elfin Forest Resort (EC-EF).
Temporal Representation:	Samples were collected in May, September, and November 1998 and May 1999.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):
LOE ID:	3238
Pollutant:	Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:	Population/Community Degradation
Matrix:	Not Specified
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Two sets of samples were collected by the Stream Team at Escondido Creek in 2001. For both sets, Taxa Richness was 4.7. For set 1, EPT index was 87.3, and was 88.2 for the second set. Tolerance valuse for sets 1 and 2 were 4.3 and 4.4, respectively. 98.4-100% of feeding groups were either collectors of filterers. (SDRWQCB, 1999-A).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:
Objective/Criterion Reference:
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek. Two sets of samples were reported. It is unclear whether both sets were taken at the same location.
Temporal Representation:	Samples were collected in Spring of 2001.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):
LOE ID:	3237
Pollutant:	Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:	Population/Community Degradation
Matrix:	Not Specified
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Data were collected for the San Diego Regional Water Quality Control Board 1999 Biological Assessment Annual Report. The physical habitat score for EC-RSFR) was 86 in 05/1998, lower conpared to other waterbodies. The BMI score was slightly below average at this location, compared to other waterbodies. (SDRWQCB, 1999-A).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:
Objective/Criterion Reference:
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at 5 riffles upstream of Rancho Santa Fe Road (EC-RSFR).
Temporal Representation:	Samples were collected in 05/1998.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):
LOE ID:	3235
Pollutant:	Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:	Population/Community Degradation
Matrix:	Not Specified
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Data were collected in 1998 and 1999 for the San Diego Regional Water Quality Control Board 1999 Biological Assessment Annual Report. Physical habitat scores for locatoin EC-HRBranged from 75-98, a relatively low score compared to other sampled waterbodies. BMI scores at this location ranged from average to below average, compared to other sampled waterbodies. (SDRWQCB, 1999-A).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:
Objective/Criterion Reference:
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected in Escondido Creek 5 riffles downstream of Harmony Grove Bridge (EC-HRB).
Temporal Representation:	Samples were collected in May, September and November 1998 and in May 1999.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5677
Pollutant:	Beryllium
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5677

LOE ID:	3224
Pollutant:	Beryllium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. 1 sample was collected, it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for Beryllium is 0.004 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	One sample was collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5689
Pollutant:	Boron
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. None of the 4 samples exceed the Basin Plan criteria, and this does not exceed the allowable frequency of the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5689

LOE ID:	3242
Pollutant:	Boron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998-2000. None of the 4 samples were in exceedance. (S.D. Dept. of Water Resources).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin plan: For inland surface waters and all beneficial uses, the WQO for Boron is 0.75 mg/L. This concentration is not to be exceeded more than 10% of the time during any one year period.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November each year from 11/1998 to 05/2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):

DECISION ID	5678
Pollutant:	Cadmium
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5678

LOE ID:	3225
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for Cadmium is 0.005 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	One sample was collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5679
Pollutant:	Chromium (total)
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5679

LOE ID:	3226
Pollutant:	Chromium (total)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and was in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for Chromium is 0.05 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	One sample was collected in 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5680
Pollutant:	Copper
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5680

LOE ID:	3227
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters with a municipal beneficial use, the WQO for copper is 1.0 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5701
Pollutant:	Mercury
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5701

LOE ID:	3228
Pollutant:	Mercury
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO for mercury is 0.002 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5710
Pollutant:	Nickel
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5710

LOE ID:	3229
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For all waters with a municipal beneficial use, the WQO nickel is 0.1 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5735
Pollutant:	Oxygen, Dissolved
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. None of the 5 samples exceed the Basin Plan criteria, and this does not exceed the allowable frequency of the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5735

LOE ID:	3239
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998 to 2000. None of the 5 samples were in exceedance. (S.D. Department of Water Resources).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: Dissolved oxygen levels shall not be less than 5.0 mg/l in inland surface waters with designated MAR or WARM beneficial uses or less than 6.0 mg/l in waters with designated COLD beneficial uses. The annual mean dissolved oxygen concentrations shall not be less than 7 mg/l more than 10% of the time.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November during each year from 05/1998 to 05/2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):

DECISION ID	5712
Pollutant:	Silver
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5712

LOE ID:	3232
Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters with a municipal beneficial use, the WQO for silver is 0.1 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5732
Pollutant:	Thallium
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5732

LOE ID:	3233
Pollutant:	Thallium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected, it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for thallium is 0.002 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5674
Pollutant:	Turbidity
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	Three lines of evidence are available in the administrative record to assess this pollutant. One out of 5 samples exceeded the Basin Plan criteria, and this does not exceed the allowable frequency of the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5674

LOE ID:	3219
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected in 1998 by RWQCB9. One sample was collected, it was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters with a municipal beneficial use, the WQO for turbidity is 5 ntu.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek below the Harmony Grove Bridge.
Temporal Representation:	One sample was collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):
LOE ID:	3221
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR in 1998 and 2000. One of 3 samples were in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters with a municipal beneficial use, the WQO for turbidity is 5 ntu.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November, 1998 and in November 2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):
LOE ID:	3220
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and was not in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters with a municipal beneficial use, the WQO for turbidity is 5 ntu.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5733
Pollutant:	Zinc
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5733

LOE ID:	3234
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by RWQCB9 in 1998. One sample was collected and was in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin plan: For inland surface waters with a municipal beneficial use, the WQO for zinc is 5.0 mg/L.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at Escondido Creek at the intersection of Elfin Forest and Harmony Grove.
Temporal Representation:	Samples were collected on 06/03/1998.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):

DECISION ID	5688
Pollutant:	pH
Final Listing Decision:	Do Not 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)(2006)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	One line of evidence is available in the administrative record to assess this pollutant. Three of the 9 samples exceed the Basin Plan criteria, and this does not exceed the allowable frequency of the Listing Policy. 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 section 303(d) list in the Water Quality Limited Segments category.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The decision has not changed.
SWRCB Board Decision / Staff Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not exceeded.
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 5688

LOE ID:	3240
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	3
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998 to 2000. Three of 5 field samples were in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for pH is 6.5(minimum) to 8.5 (maximum).
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected in the field at Escondido Creek near Harmony Grove.
Temporal Representation:	Samples were collected once each in May and November each year from 05/1998 to 05/2000.
Environmental Conditions:
QAPP Information:	Data used in 2002 assessment.
QAPP Information Reference(s):
LOE ID:	3241
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Data were collected by DWR from 1998 to 2000. None of 4 samples were in exceedance. (SWRCB, 2003).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for pH is 6.5(minimum) to 8.5 (maximum).
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples from Escondido Creek near Harmony Grove were analyzed in the lab.
Temporal Representation:	Samples were collected once each in May and November each year from 11/1998 to 05/2000.
Environmental Conditions:
QAPP Information:	QA Info Missing
QAPP Information Reference(s):