| Water Body Name: | All American Canal |
| Water Body ID: | CAR7270000020040811153049 |
| Water Body Type: | River & Stream |
DECISION ID |
4429 |
Region 7 |
All American Canal |
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| Pollutant: | Total Dissolved Solids |
| 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 |
| Conclusion: | 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.
One line of evidence is available in the administrative record to assess this pollutant. Three samples exceeded 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 not 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. Three of 71 samples exceeded the water quality objective and this does not 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 Staff Decision: | This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
| SWRCB Board Staff Decision: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
| USEPA Action (if applicable): | |
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| LOE ID: | 2963 | ||||
| Pollutant: | Total Dissolved Solids | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total Dissolved | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 71 | ||||
| Number of Exceedances: | 3 | ||||
| Data and Information Type: | Not Specified | ||||
| Data Used to Assess Water Quality: | Three of 71 water quality samples collected exceeded the water quality objective (CRBRWQCB, 2006a). The All American Canal is a diversion from the Colorado River, which is meant to deliver water for the beneficial uses identified in the Colorado River Basin Plan. The narrative objective for the All American Canal is the same as in the Colorado River, so it is assumed that the numerical objectives for the river are the more appropriate way to interpret the narrative objective in the canal. This approach allows consistency with the Colorado River objective. | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| Water Quality Objective/Criterion: | TDS water quality objective at Imperial Dam where water from the Colorado River is diverted to the All American Canal is 879 ppm or mg/L (Colorado River Basin Plan). | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Samples were collected from the All-American Canal by the Imperial Irrigation District. Location(s) is not known. | ||||
| Temporal Representation: | Samples were collected from June 1998 to December 2003. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QA Info Missing | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
4446 |
Region 7 |
All American Canal |
||
| 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 |
| Conclusion: | 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. One line of evidence is available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification 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: 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 of 6 samples exceeded the water quality objective and this does not exceed 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 Staff Decision: | This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
| SWRCB Board Staff Decision: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
| USEPA Action (if applicable): | |
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| LOE ID: | 2965 | ||||
| Pollutant: | Turbidity | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 6 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | Not Specified | ||||
| Data Used to Assess Water Quality: | Samples were collected by the Imperial Irrigation District (IID) from the All-American Canal once a year as part of the Annual Title 22 source water analysis from 1998 through 2003. One of 6 samples was in exceedance of the recommended criterion. This sample was collected on 6/19/1998 (CRBRWQCB, 2004a). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| Water Quality Objective/Criterion: | |||||
| Objective/Criterion Reference: | |||||
| Evaluation Guideline: | California Code of Regulations: Recommended Secondary Maximum Contaminant Level = 5 NTU for water supplied to the public, because this may adversely affect the taste, odor or appearance of drinking water. | ||||
| Guideline Reference: | Placeholder reference 2006 303(d) | ||||
| Spatial Representation: | Samples were collected from the All-American Canal at Drop # 4. | ||||
| Temporal Representation: | Samples were collected once a year from 1998 through 2003. Samples were collected in June in 1998-1999, October in 2000-2002, and November in 2003. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Imperial Irrigation District (IID) SOPs and Clinical Laboratory of San Bernardino (CLSB) QA Manual. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
4447 |
Region 7 |
All American Canal |
||
| 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 |
| Conclusion: | 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.
One line of evidence is available in the administrative record to assess this pollutant. One of the 66 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 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. One of 66 samples exceeded the water quality objective and this does not exceed 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 Staff Decision: | This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
| SWRCB Board Staff Decision: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
| USEPA Action (if applicable): | |
|
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| LOE ID: | 2966 | ||||
| Pollutant: | pH | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total Dissolved | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 66 | ||||
| Number of Exceedances: | 1 | ||||
| Data and Information Type: | Not Specified | ||||
| Data Used to Assess Water Quality: | Samples were collected monthly by the Imperial Irrigation District (IID) from the All-American Canal from 1998 through 2003. One of 66 samples was in exceedance of the criteria (CRBRWQCB, 2004a). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| Water Quality Objective/Criterion: | Colorado River RWQCB Basin Plan: Minimum = 6.0 s.u., Maximum = 9.0 s.u. | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Samples were collected from the All-American Canal below Drop # 1. | ||||
| Temporal Representation: | Samples were collected once a month from 6/21998 through 1/12/2004. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Imperial Irrigation District (IID) SOPs. | ||||
| QAPP Information Reference(s): | |||||