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| − | This page summarizes the development and implementation of Total Maximum Daily Load (TMDL) plans in the Monterey Bay region of California. The page is being created by the [[ENVS 560/L Watershed Systems]] class at [http://csumb.edu CSUMB].
| + | An [[Summaries of Environmental Topics on the Central Coast of California|environmental summary]] created by the [[ENVS 560/L Watershed Systems]] class at [[CSUMB]]. |
| | | | |
| − | == Page editing notes & scoring rubric ==
| + | This page provides links to documents relating to [[303d]] listings and [[Total Maximum Daily Load]] (TMDL) plans in [[California's Central Coast Region]]. The page was created by the [[ENVS 560/L Watershed Systems]] class at [http://csumb.edu CSUMB]. |
| | | | |
| − | This section of this page will be deleted once the page is fleshed out. Instructions to students:
| + | ==Background== |
| | + | :''Main article: [[TMDL]]'' |
| | | | |
| − | * When you START working on the page, enter your initials here (and save):
| + | Under 1987 provisions (section 304 (1)) to the [[Clean Water Act]] of 1972, states must identify and report all water bodies which do not meet [[water quality]] or [[beneficial use]] standards. Those impaired (polluted) water bodies not meeting water quality standards must be placed on the [[303d list]]. |
| − | ** Initials: _ES_____. Mainly working on: __Approaches to Linkage Analysis_____
| + | |
| − | ** Initials: VP. Mainly working on: Monitoring/Evaluation
| + | |
| − | ** Initials: RH. Mainly working on: tmdl develop and implement fleshing this out
| + | |
| − | ** Initials: PKD. Mainly working on: Monterey Bay area listings
| + | |
| − | ** Initials: AAY. Mainly working on: Regionally approved TMDLs considered
| + | |
| − | ** Initials: BK. Working on problem id
| + | |
| − | ** Initials: SQ. Mainly working on: Source Analysis
| + | |
| − | * When you're done, remove your initials, and save.
| + | |
| − | * When done with a session, email everyone to say "I've just added _____".
| + | |
| − | * There are 8 students. Each student should flesh out one section. The sections should be fleshed out in order if possible.
| + | |
| − | * As you go, read everyone else's work and edit as necessary.
| + | |
| − | * The whole page needs to be of good quality for anyone to get a full score. Individuals would only be downgraded if they made only minimal contribution. All would be downgraded if page fell short of being a brief but informative snapshot of a few example TMDLs in our immediate vicinity.
| + | |
| | | | |
| − | == Background ==
| + | States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the [[303d list]]. A remediation plan must then be developed and implemented for each impaired water body listed. |
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| − | Under the federal Clean Water Act, all impaired (e.g. polluted) waters in the USA must be placed on a list called the 303d list. A remediation plan must then be developed and implemented for each listing on each impaired water body. These plans are called TMDLs, referring to the goal of defining and achieving a total maximum daily load of each pollutant within each body.
| + | These plans are known as total maximum daily loads (TMDLs). [[TMDL]]s are used to define and achieve a total maximum daily load for each pollutant causing impairment within a water body. The list also identifies where a TMDL has been approved by the [[Environmental Protection Agency]] (EPA) and implementation is available, but water quality standards have not yet been met, or an action other than a TMDL is being used to address the issue. |
| | | | |
| − | == Monterey Bay area listings == | + | ===Summary of listing categories=== |
| | + | The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.<ref>[[CCRWQCB|Central Coast Regional Water Quality Control Board]]. 2009. Clean water act sections 305(b) and 303(d) integrated report for the Central Coast region. Public review draft April. http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf</ref> |
| | | | |
| − | The 303d for the Central Coast Region of California is maintained by the Central Coast Regional Water Quality Control Board. Various links present, explain, and discuss the list, including:
| + | * Category 1. All core uses are supported; |
| − | * [http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf 2006 report]. | + | * Category 2. At least one core use is supported; |
| − | * [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf TMDL progress since 2006] | + | * Category 3. Insufficient information exists to make a determination; |
| − | * [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_a.pdf Recommended changes since the 2006 list] | + | * Category 4A. At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified time frame (p.10, CCRWQCB)." |
| − | * Explanations and appendices for each category of listing:
| + | * Category 4B. At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified timeframe (p.10, CCRWQCB)." |
| − | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_b.shtml Category 2]
| + | * Category 5. At least one core use is not supported. A TMDL needs to be developed. |
| − | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_c.shtml Category 3] | + | |
| − | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_d.shtml Category 4A] | + | |
| − | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_e.shtml Category 5]
| + | |
| | | | |
| − | Category Descriptions <ref>[CCRWQCB] Central Coast Regional Water Quality Control Board. 2009. Clean water act sections 305(b)and 303(d)integrated report for the Central Coast region. Public review draft April. Internet copy available at: http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf </ref>:
| + | ==Central Coast 303d list documents== |
| − | *1) All core uses are supported;
| + | The [[303d list]] for the Central Coast region of California (Region 3) is maintained by the [[Central Coast Regional Water Quality Control Board]]. The 2006 303(d) list for the Central Coast region is available as a .pdf or .xls file<ref>CCRWQCB. 2006. 2006 CWA Section 303(d) List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region). http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf </ref><ref>CCRWQCB. 2006. List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region) http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls></ref>. The 2010 303(d) statewide list is available as an .xls file<ref>CCRWQCB. 2010. Combined California 2010 303(d) list with potential sources. http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls</ref> but is not available as a Central Coast-specific document as of March 2014. The 2012 303(d) statewide list was approved by the EPA on July 30, 2015 and is available via an [http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2012.shtml integrated report] on the [[State Water Resources Control Board]] website. Although there was some Central Coast data not included in the 2012 Integrated Report, and in those cases, decisions were carried over from the 2010 list. |
| − | *2) At least one core use is supported;
| + | |
| − | *3) Insufficient information exists to make a determination;
| + | |
| − | *4A) At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within areasonable, specified time frame (p.10, CCRWQCB)."
| + | |
| − | *4B) At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in theattainment of the water quality standard within a reasonable, specified timeframe (p.10,CCRWQCB)."
| + | |
| − | *5) At least one core use is not supported. A TMDL needs to be developed.
| + | |
| − |
| + | |
| | | | |
| − | The closest listings to Monterey Bay include:
| |
| | | | |
| − | * For each item on this list, we need:
| + | ====Monterey Bay area reports and listings, 2015==== |
| − | ** Water body
| + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/ag_waivers/docs/no_co_characterization%20rpt_06012015_final.pdf Northern Counties Groundwater Characterization, Salinas Valley, Pajaro Valley and Gilroy‐Hollister Valley] |
| − | ** Pollutant
| + | |
| − | ** Priority or category of listing. See [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d_list.shtml here] for some indication of category.
| + | |
| − | ** Status (in development, approved, by whom, etc)
| + | |
| − | ** Link to 2009 fact sheet for the listing. See [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f.shtml here] for fact sheets.
| + | |
| | | | |
| − | * Salinas River (lower, estuary to near Gonzales Rd crossing)[http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f/00860.shtml#5282 Fact Sheet]
| + | ====Monterey Bay area reports and listings, 2010-2012==== |
| − | ** Fecal Coliform, low priority, Category 5A, TMDL in Progress, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/docs/salinas/salinas_fecal_col_data_anal_rpt_june05_deliverable.pdf Report]
| + | |
| − | ** Nitrate, high priority, Category 5A <ref name="List303d2008">Central Coast Regional Water Quality Control Board. 2008. Available at: http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_e.shtml</ref>
| + | |
| − | ** Chloride, medium priority, Category 5A <ref name="List303d2008"/>
| + | |
| − | ** Chlorpyrifos, high priority, Category 5A
| + | |
| − | ** Diazinon, high priority, Category 5A
| + | |
| − | ** Electrical Conductivity, low priority, Category 5A
| + | |
| − | ** Enterococcus, low priority, Category 5A
| + | |
| − | ** E. Coli,low priority, Category 5A
| + | |
| − | ** Sodium, low priority, Category 5A
| + | |
| − | ** Total Dissolved Solids, low priority, Category 5A
| + | |
| − | ** Turbidity, low priority, Category 5A
| + | |
| − | ** Unknown Toxicity, high priority, Category 5A
| + | |
| − | ** pH, low priority, Category 5A
| + | |
| − | * Watsonville Slough, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f/00812.shtml Fact Sheet]
| + | |
| − | ** Pathogens, USEPA approved TMDL, [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf Project Report], low priority, Category 5A
| + | |
| − | ** Pesticides, TMDL in Progress, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/docs/watsonville/ph4_prj_rpt_watsonville_slough_pest_update.pdf Preliminary Project Report], low priority, Category 5A
| + | |
| − | ** Ammonia, low priority
| + | |
| − | ** Chlorophyll-a,low priority
| + | |
| − | ** Chlorpyrifos, low priority
| + | |
| − | ** Diazinon, low priority
| + | |
| − | ** Sediment Toxicity,low priority
| + | |
| − | ** Sedimentation/Siltation, low priority
| + | |
| − | ** Total Coliform, low priority
| + | |
| − | ** pH, low priority
| + | |
| − | ** Pathogens, low priority, Category 5B
| + | |
| − | ** Pesticides, low priority, Category 5A
| + | |
| − | ** Low Dissolved Oxygen, low priority, Category 5A
| + | |
| | | | |
| − | * Tembladero Slough,[http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f/00856.shtml#5630 Fact Sheet] , | + | * [http://www.waterboards.ca.gov/centralcoast/board_info/agendas/2011/march/Item_14/14_att7.pdf Water Quality Conditions in the Central Coast Region Related to Agricultural Discharges] |
| − | ** Fecal Coliform, SWRCB approved, low priority, Category 5A
| + | Please see the following pages for information on 303(d) listed waterbodies and their impairments in the Monterey Bay region. |
| − | ** Chlorophyll-a, CCRWQCB approved, low priority, Category 5A
| + | *[[Monterey Bay Area TMDL Listings]] (table) |
| − | ** Chlorpyrifos, CCRWQCB approved, high priority, Category 5A
| + | *[[Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents]] (list) |
| − | ** Diazinon, CCRWQCB approved, high priority, Category 5A
| + | *[[Approaches to TMDL Development and Implementation in the Monterey Bay Area]] |
| − | ** Escherichia coli (E. Coli), CCRWQCB approved, low priority, Category 5A
| + | |
| − | ** Nitrate, CCRWQCB approved,high priority, Category 5A
| + | |
| − | ** Sediment Toxicity, CCRWQCB approved, low priority, Category 5A
| + | |
| − | ** Total Coliform, CCRWQCB approved, low priority, Category 5A
| + | |
| − | ** Turbidity, CCRWQCB approved, low priority, Category 5A
| + | |
| − | ** Unknown Toxicity, CCRWQCB approved,high priority, Category 5A
| + | |
| − | ** pH, CCRWQCB approved, low priority, Category 5A
| + | |
| − | ** Nutrients, CCRWQCB approved, high priority, Category 5A
| + | |
| − | ** Pesticides, CCRWQCB approved, Category 5A
| + | |
| − | * Lower Salinas River and Elkhorn Slough, Pesticides and Priority Organics, TMDL in Progress, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/docs/salinas/CEQA_Summary_2.pdf Project Summary]
| + | |
| − | * Corralitos Creek, Pathogen, TMDL in Progress, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/docs/corralitos/cor_fec_tmdlatt4_pubnot.pdf Public Hearing Proposed Basin Plan Amendment for Corralitos and Salsipuedes Creek] | + | |
| − | *Gabilan Creek, [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f/00865.shtml Fact Sheet] <ref>CCRWQCB</ref> | + | |
| − | ** Fecal Coliform, Low Priority, Category 5A
| + | |
| − | ** Nitrate,High Priority, Category 5A
| + | |
| − | ** pH, Low Priority, Category 5A
| + | |
| − | ** Boron, Low Priority
| + | |
| − | ** Chlorophyll-a,Low Priority
| + | |
| − | ** Dieldrin, Low Priority
| + | |
| − | ** Electrical Conductivity, Low Priority
| + | |
| − | ** Endrin, Low Priority
| + | |
| − | ** Escherichia coli (E. Coli), Low Priority
| + | |
| − | ** Low Dissolved Oxygen, Low Priority | + | |
| − | ** Nitrogen, ammonia, High Priority, Category 5A
| + | |
| − | ** Salinity, Low Priority
| + | |
| | | | |
| − | == TMDL development and implementation == | + | ====Central Coast reports and listings, 2006-2008==== |
| | | | |
| − | The federal EPA provides [http://www.epa.gov/owow/tmdl/strathp.pdf protocols for TMDL development] in general, and for specific types of constituents such as [http://www.epa.gov/owow/tmdl/pathogen_all.pdf pathogens]. These protocols outline the following components of a TMDL:
| + | * From the [http://www.swrcb.ca.gov/rwqcb3 CCRWQCB web site], [http://www.swrcb.ca.gov/rwqcb3/water_issues/programs/tmdl/index.shtml TMDL program], [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d_list.shtml 303d-list page]: |
| | + | ** [http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf Impaired waterbody (303d) list (.pdf)]. |
| | + | ** [http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls Impaired waterbody (303d) list (.xls)] |
| | + | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf Clean Water Act Sections 305(b) and 303(d) Integrated Report for the Central Coast Region] (approved 2009) |
| | + | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_a.pdf Recommended changes since the 2006 list] |
| | + | ** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f.shtml 2008 New or Revised Fact Sheets for the Central Coast region] |
| | + | ** 2008 listings by category (see [[#Summary of listing categories | Summary of listing categories]]): |
| | + | *** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_b.shtml Category 2] |
| | + | *** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_c.shtml Category 3] |
| | + | *** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_d.shtml Category 4A] |
| | + | *** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_e.shtml Category 5] |
| | | | |
| − | * Identify waters requiring TMDLs
| |
| − | * Priority ranking and targeting
| |
| − | * Develop TMDLs (see below)
| |
| − | * Assess control actions
| |
| − | ** Evaluating success of control actions through monitoring is required in some states, but this is not directly required at the federal level unless a point source permit under section 402 is revised<ref name="killam"/>.
| |
| − |
| |
| | | | |
| − | === Components of TMDL development === | + | ====Statewide listings including the Central Coast, 2010==== |
| | | | |
| − | (Summarized from, for example, [http://www.epa.gov/owow/tmdl/nutrient/pdf/nutrient.pdf EPA Protocols for developing nutrient TMDLs]) | + | *From the [http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml State Water Resources Control Board 2010 Integrated Report] website: |
| | + | **[http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311.xls Impaired waterbody (303(d)) list, without potential sources (.xls)] |
| | + | **[http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls Impaired waterbody (303(d)) list, with potential sources (.xls)] |
| | + | **[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/table_of_contents.shtml#r3 New or revised fact sheets for Region 3 (Central Coast region)] |
| | + | **[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/miscellaneous_changes_report.shtml#r3 Miscellaneous changes for the Central Coast region] |
| | + | **[http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml Maps, data download, and other materials (2010)] |
| | + | **2010 listings by category (see [[#Summary of listing categories | Summary of listing categories]]): |
| | + | ***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category2_report.shtml Category 2] |
| | + | ***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category3_report.shtml Category 3] |
| | + | ***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category4a_report.shtml Category 4A] |
| | + | ***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category4b_report.shtml Category 4B] |
| | + | ***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category5_report.shtml Category 5] |
| | | | |
| − | * Problem Statement
| + | ==Central Coast TMDL Projects== |
| − | ** Identify Problem
| + | |
| − | *** Problem identification starts the process of the TMDL by summarizing the existing impairments, where they are located, and what probable sources are known. Collecting existing data, identifying designated uses, and evaluating seasonal factors are parts of this early summary.
| + | |
| − | * Numeric Targets
| + | |
| − | ** Develop Numeric Targets
| + | |
| − | *** Research applicable water quality standards for the waterbody depending on jurisdictions and uses.
| + | |
| − | ** Select indicators
| + | |
| − | *** Technical and general scientific validity and practical time and cost considerations are useful in selecting whch indicators to pick.
| + | |
| − | ** Identify target values
| + | |
| − | *** Choosing target values or conditions is complex, so local examples and experience in setting target values is extremely useful in the process. Various historical levels, and especially reference reach conditions can start the process. Other factors to consider when setting values are seasonal fluxes and spatial variability in the indicator. Values can be graduated on categorical type (e.g. tributary vs. main stem), and a margin of safety should be applied. The margin of safety is based on reliability and accuracy of indicator measurements, the degree of impairment, direct impacts,and best professional judgment based on experience and literature.
| + | |
| − | ** Compare existing and target conditions
| + | |
| − | * Source Assessment
| + | |
| − | ** Identify sources
| + | |
| − | ***Inventory possible sources, characterize types of sources and their possible pathways.
| + | |
| − | ** Estimate source loadings
| + | |
| − | ***Monitoring data, statistical relationships, and models are used to estimate loads.
| + | |
| − | * Linkage Analysis
| + | |
| − | ** Link Targets and Sources
| + | |
| − | ***Identify pathways of cause and effect between pollutant source and water quality target. Define needed level of analysis and then use monitoring data, variability, hydraulic characteristics, and type of indicator to create links. Simulation models can be utilized when other means are not sufficient to lik indicators and sources.
| + | |
| − | ** Assess linkages
| + | |
| − | ** Estimate total loading capacity
| + | |
| − | * Allocations
| + | |
| − | ** Load allocation
| + | |
| − | ** Divide load among sources
| + | |
| − | * Monitoring/Evaluation Plan
| + | |
| − | ** Develop monitoring plan
| + | |
| − | ** Develop review plan
| + | |
| − | ** Develop schedule
| + | |
| − | ** Implementation Plan
| + | |
| − | ** Develop plan
| + | |
| − | *** Currently, once a TMDL is developed and approved for a water body it can be removed from the 303d list<ref name="killam">
| + | |
| − | Killam G. 2005. The Clean Water Act Owner's Manual. Oregon: River Network.</ref>
| + | |
| − | * Implement control action
| + | |
| − | *** This can involve lowering permitted discharges if present, and using as many other strategeies as possible. Other strategies could be regulations, educational programs, best management practices, cost-sharing or other assistance, and use of volunteer groups<ref name="killam"/>.
| + | |
| | | | |
| − | == Approaches to TMDL development and implementation in the Monterey Bay area == | + | ====TMDL Projects Currently in Development (2015-2016)==== |
| − | Approaches to each of the above components vary throughout the nation. Approaches used in the Monterey Bay area are summarized here. First, a list is given of the approved TMDLs that are considered in this summary. This is followed by a summary of approaches used within these TMDLs, organized according to the different components of a TMDL.
| + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/carpinteria_marsh/index.shtml Carpinteria Salt Marsh] (nutrients) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/elkhorn_slough/do/index.shtml Elkhorn Slough Bennett Slough] (Biostimulatory substances) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/pajaro/nutrients/index.shtml Pajaro River] (nutrients) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/pinto_lake/index.shtml Pinto Lake catchment] (harmful algal blooms) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/salinas/sed_tox/index.shtml Salinas River] (sediment toxicity, pyrethroid pesticides) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/salinas/turbidity/index.shtml Salinas River] (turbidity) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/santa_maria/salts/index.shtml Santa Maria River] (salts) |
| | + | *[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/santa_ynez/nutrient/index.shtml Santa Ynez River] (nutrients) |
| | | | |
| − | === Regionally approved TMDLs considered ===
| + | ==References== |
| − | | + | |
| − | TMDLs for the Monterey Bay area approved by the [[CCRWQCB]] are listed below (a subset of the [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d_and_tmdl_projects.shtml full list for the region]).
| + | |
| − | | + | |
| − | * Watsonville Slough Pathogens TMDL<ref
| + | |
| − | name="WatsonvillePathogensTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf Watsonville Slough Pathogens TMDL - Final Project Report, DRAFT].</ref>
| + | |
| − | ** Approved at the Federal, State and Regional level
| + | |
| − | *Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL<ref name="Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TDML - Final Project Report].</ref>
| + | |
| − | **Approved at the Federal, State and Regional level
| + | |
| − | *Pajaro River (Including Llagas Creek) Nitrate TMDL <ref name="Pajaro River (Including Llagas Creek) Nitrate TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River Nitrate (Including Llagas Creek) TDML - Final Project Report].</ref>
| + | |
| − | **Approved at the Federal, State and Regional level
| + | |
| − | *San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL <ref name="San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL - Report].</ref>
| + | |
| − | **Approved at the Federal, State and Regional level
| + | |
| − | *Las Tablas Creek and Lake Nacimiento Mercury TMDL <ref name="Las Tablas Creek and Lake Nacimiento Mercury TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0107_las_tablas_mercury_tmdl_final_proj_rpt.pdf Las Tablas Creek and Lake Nacimiento Mercury TMDL - Draft Report].</ref>
| + | |
| − | ** Approved at the Regional level only.
| + | |
| − | | + | |
| − | === Approaches to Problem Identification ===
| + | |
| − | | + | |
| − | Last edited by BK 4/16/09 at 00:06. Still working. Need more info on Watsonville slough and Las Tablas. Also need to format references.
| + | |
| − | | + | |
| − | On the Central Coast of California, listings on the Section 303(d) have been based on the specific water quality objectives
| + | |
| − | contained within the Central Coast Region’s Water Quality Control Plan (Basin Plan)
| + | |
| − | [http://www.swrcb.ca.gov/rwqcb3/publications_forms/publications/basin_plan/bp_pdfversion/index.shtml]. Once listed the state prioritizes the impaired water bodies for TMDL submission. The TMDL submission needs to include a problem statement, which is a description of the waterbody/watershed setting, beneficial use impairments of concern, and pollutants or stressors causing the impairment [http://yosemite.epa.gov/r10/water.nsf/TMDLs/TMDL+Overview (EPA Region 10 TMDL process overview)]. Identified problem statements for approved regional TMDLs are:
| + | |
| − | | + | |
| − | Pajaro River Watershed
| + | |
| − | * Pajaro River and Llagas creek were listed as impaired by sediment on the 1998 Section 303(d) based on qualitative assessment of turbidity (The Establishment of Nutrient Objectives, Sources, Impacts, and Best Management Practices for the Pajaro River and Llagas Creek, San Jose State University 1996). The 303(d) listing report did not specify which beneficial uses were affected.
| + | |
| − | * Rider Creek was listed as impaired by sediment/siltation based on the sediment budget analysis which found sediment being exported to Corralitos Creek, and degrading steelhead rearing habitat (Rider Creek Sediment Management Plan, Santa Cruz County, California WRC Environmental, 1991)
| + | |
| − | * San Benito River was found to be sediment starved, and causing accelerated downcutting and increased headwater incision (Qualitative and Quantitative Analysis of Degradation of the San Benito River, Golder Associates, 1997) . It was listed as impaired by sediments.
| + | |
| − | * Assessment of nitrate concentration was used to check the quality of municipal and domestic water supply.
| + | |
| − | | + | |
| − | San Lorenzo River Watershed
| + | |
| − | * Counts of endangered and threatened fish populations of steelhead and Coho salmon showed their drastic decline in the watershed.
| + | |
| − | * San Lorenzo River, Carbonera Creek, Lompico Creek and Shingle Mill Creek have been identified as impaired by sediment due to negative impact to beneficial uses associated with anadromous fisheries.
| + | |
| − | * Municipal water suppliers have shut down the intake facilities during the periods of high flows because the facilities' filtering capacities have been overwhelmed by excessive turbidity and sedimentation.
| + | |
| − |
| + | |
| − | Watsonville Slough (no explicit problem statement section)
| + | |
| − | * Wet and dry season sampling for fecal bacteria was used to confirm the existence of a potential pathogen problem in the water body.
| + | |
| − | * Genetic testing was used as source analysis for coliform bacteria.
| + | |
| − | | + | |
| − | Las Tablas Creek and Lake Nacimiento
| + | |
| − | | + | |
| − | === Approaches to developing Numeric Targets ===
| + | |
| − | | + | |
| − | TMDL numeric targets differ depending on the pollutant being targeted.
| + | |
| − | | + | |
| − | ==== Approaches to developing Numeric Targets for Pathogens ====
| + | |
| − | | + | |
| − | When calculating bacterial levels, the most probable method [http://en.wikipedia.org/wiki/Most_probable_number (MPN)] is utilized to determine population densities within the water. An example of this method being used int the Monterey Bay Region would an ''Escherichia coli'' [http://en.wikipedia.org/wiki/Escherichia_coli (E. Coli)] TMDL standard developed for the Watsonville Slough <ref
| + | |
| − | name="WatsonvillePathogensTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf
| + | |
| − | Watsonville Slough Pathogens TMDL - Final Project Report, DRAFT].</ref>. The TMDL for the E. coli pathogen are defined to be:
| + | |
| − |
| + | |
| − | * [http://en.wikipedia.org/wiki/Geometric_mean Geometric mean] 200MPN/100ml (min of 5 samples per 30 days)
| + | |
| − | * Maximum of 400MPN/100ml (not more than 10% of samples per 30 days)
| + | |
| − | For more information on pathogen TMDL development, see The United States Environmental Protection Agency "Protocol for developing pathogen TMDLs"<ref name="US EPA Protocol for Developing Pathogen TMDLs">[http://www.epa.gov/owow/tmdl/pathogen_all.pdf]US EPA Protocol for Developing Pathogen TMDLs. </ref>
| + | |
| − | | + | |
| − | ==== Approaches to developing Numeric Targets for Sediment ====
| + | |
| − | | + | |
| − | Sediment TMDLs use a different approach. For the Monterey Bay area, annual total sediment by weight are used to describe TMDLs. Sediment has two categories, uncontrollable (natural or background) and controllable. TMDLs target the controllable portion of sediment and includes the natural levels in the equation. To better define the loads a watershed may release, watershed can be devided into sub watersheds to determine each regions contribution to the whole. For the Monterey Bay Region, two separate sediment TMDLs have been developed:
| + | |
| − | | + | |
| − | * Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL<ref name="Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf
| + | |
| − | Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL - Final Project Report].</ref>
| + | |
| − | ** Tres Pinos - 53,778 metric tons/year
| + | |
| − | ** San Benito - 39,679 metric tons/year
| + | |
| − | ** Llagas - 9,185 metric tons/year
| + | |
| − | ** Uvas - 15,177 metric tons/year
| + | |
| − | ** Upper Pajaro - 43,951 metric tons/year
| + | |
| − | ** Corralitos (including Rider Creek) - 11,389 metric tons/year
| + | |
| − | ** Mouth of Pajaro - 7,268 metric tons/year
| + | |
| − | * San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL <ref name="San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf
| + | |
| − | San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL - Report].</ref>
| + | |
| − | ** Shingle Mill Creek- 857 tons/year
| + | |
| − | ** Carbonera Creek - 11,728 tons/year
| + | |
| − | ** Carbonera Creek - 9,542 tons/year
| + | |
| − | ** San Lorenzo River - 306,139 tons/year
| + | |
| − | | + | |
| − | For more information on sediment TMDL development, see The United States Environmental Protection Agency "Protocol for developing sediment TMDLs"<ref name="US EPA Protocol for Developing Sediment TMDLs">[http://www.epa.gov/owow/tmdl/sediment/pdf/sediment.pdf]US EPA Protocol for Developing Sediment TMDLs. </ref>
| + | |
| − | | + | |
| − | ==== Approaches to developing Numeric Targets for Nutrients ====
| + | |
| − | | + | |
| − | Nitrate levels are usually measured in mg/l nitrate-N. Since the United Stated Environmental Protection Agency Title 40 part 141.23<ref name="US EPA Title 40 PART 141 National Primary Drinking Water Regulations">[http://www.access.gpo.gov/nara/cfr/waisidx_02/40cfr141_02.html]US EPA Title 40 PART 141 National Primary Drinking Water Regulations. </ref> regulates nitrate not to exceed 10mg/l of nitrate-N, this is a common TMDL applied to watersheds. An example in the Monterey Bay Region can be found in the Pajaro River (Including Llagas Creek) Nitrate TMDL report<ref name="Pajaro River (Including Llagas Creek) Nitrate TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River (Including Llagas Creek) Nitrate TMDL - Final Project Report].</ref> This report concluds:
| + | |
| − | *Nitrate in Pajaro River and Llagas Creek is set at a maximum concentration of 10 mg/l nitrate-N
| + | |
| − | For more information on nutrient TMDL development, see The United States Environmental Protection Agency "Protocol for developing nutrient TMDLs"<ref name="US EPA Protocol for Developing Nutrient TMDLs">[http://www.epa.gov/owow/tmdl/nutrient/pdf/nutrient.pdf]US EPA Protocol for Developing Nutrient TMDLs. </ref>
| + | |
| − | | + | |
| − | ==== Approaches to developing Numeric Targets for Metals ====
| + | |
| − | | + | |
| − | Toxic metals can be both suspended and in the sediment, therefore they require to be monitored in the water column and within the sediment. In the Monterey Bay Region, the Las Tablas Creek and Lake Nacimiento Mercury TMDL <ref name="Las Tablas Creek and Lake Nacimiento Mercury TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0107_las_tablas_mercury_tmdl_final_proj_rpt.pdf Las Tablas Creek and Lake Nacimiento Mercury TMDL - Draft Report].</ref> does this.
| + | |
| − | | + | |
| − | * The Cal/EPA 40 CFR Part 131<ref name="California Environmental Protection Agency 40 CFR Part 131 Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule">[http://www.epa.gov/fedrgstr/EPA-WATER/2000/May/Day-18/w11106.pdf]California Environmental Protection Agency 40 CFR Part 131 Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. </ref>, also referred to as the "California Toxic Rules" regulates mercury in water at 0.05 μg/L, so that is the targeted water TMDL
| + | |
| − | * For sediment, the proposed TMDL for mercury is 0.486 mg/kg, based on the National Oceanic and Atmospheric Administration Permissible Exposure Limits [http://chemresponsetool.noaa.gov/loc_guide/pel.htm (NOAA PEL)]
| + | |
| − | | + | |
| − | === Approaches to Source Analysis ===
| + | |
| − | | + | |
| − | SQ still working on this section.
| + | |
| − | | + | |
| − | The approaches that have been used to identify and analyze potential sources in TDMLs approved so far.
| + | |
| − | | + | |
| − | *Watsonville Slough Pathogens TMDL<ref
| + | |
| − | name="WatsonvillePathogensTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf
| + | |
| − | Watsonville Slough Pathogens TMDL - Final Project Report, DRAFT].</ref>
| + | |
| − | **Initial Source Tracking
| + | |
| − | ***Initial monitoring : sampling
| + | |
| − | ***Increased monitoring to problem areas to isolate and identify sources: focused grab sampling and dye testing
| + | |
| − | **Genetic Analysis
| + | |
| − | ***Toxic Gene Biomarker Method
| + | |
| − | ****DNA extraction of E.colli colonies on agar plates in water grab samples
| + | |
| − | ****DNA analysis for presence/ absence of toxin genes specific to host animals
| + | |
| − | **Hydrologic Modification Analysis
| + | |
| − | ***Analysis of potential relationships between waterbody circulation and bacteria concentration
| + | |
| − | **Land Use Distribution Analysis
| + | |
| − | ***Analysis of potential relationships between land use in subwatersheds with exceedences of water quality objectives
| + | |
| − | *Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL<ref name="Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf
| + | |
| − | Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL - Final Project Report].</ref>
| + | |
| − | **Integrated quantitative past source identification with analysis by Tetra Tech
| + | |
| − | ***Past source identification analysis consisted of the collection and analysis of sediment data
| + | |
| − | ***Tetra Tech used the Soil and Water Assessment Tool (SWAT) computer model to quantify sediment sources
| + | |
| − | *Pajaro River (Including Llagas Creek) Nitrate TMDL <ref name="Pajaro River (Including Llagas Creek) Nitrate TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf
| + | |
| − | Pajaro River (Including Llagas Creek) Nitrate TMDL - Final Project Report].</ref>
| + | |
| − | **Land use based approach
| + | |
| − | ***Use of multi-resolution datasets to identify land cover type
| + | |
| − | ***Sample data collection
| + | |
| − | ***Pollution load equation in ArcGIS to calculate nonpoint sources of pollution in watersheds.
| + | |
| − | ****PLOAD Version 3.0
| + | |
| − | *San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL <ref name="San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf
| + | |
| − | San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL -Report].</ref>
| + | |
| − | **Sediment source and sediment production data was used to estimate erosion rates, delivery ratios and sedimentation rates.
| + | |
| − | ***Sediment source data derived from GIS layers obtained from Santa Cruz county's Environmental management information system (SCC EMIS)
| + | |
| − | ***Sediment production data derived from
| + | |
| − | ****Field data collected on roads and landslides
| + | |
| − | ****Field data collected for stream bank erosion
| + | |
| − | ****Extrapolation of field data and sediment production estimates
| + | |
| − | *Las Tablas Creek and Lake Nacimiento Mercury TMDL <ref name="Las Tablas Creek and Lake Nacimiento Mercury TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0107_las_tablas_mercury_tmdl_final_proj_rpt.pdf
| + | |
| − | Las Tablas Creek and Lake Nacimiento Mercury TMDL - Draft Report].</ref>
| + | |
| − | **Developed a Mercury loading model based on a geographical information systems (GIS) database combined with chemical sample data (Mercury loading model and chemical sample data from Rice et al. 2004)
| + | |
| − | ***Estimated basin and sub-basin areas using GIS and Calwater 2.2 basin outlines
| + | |
| − | ***Estimated mercury concentration for each area
| + | |
| − | ***Summed annual mercury loads for each sub-area to create a mercury load model
| + | |
| − | | + | |
| − | === Approaches to Linkage Analysis ===
| + | |
| − | | + | |
| − | Linkage analysis involves examining and establishing cause-and-effect connections between the pollutant sources and the water quality [[#Approaches_to_developing_Numeric_Targets | targets]]. This linkage can be established through a combination of long-term monitoring data analysis, simulation models, best professional judgment, and previously established relationships. The association between pollutant sources and water quality targets established by the linkage can be used to estimate the pollution [[TMDL_load|load]] capacity of the watershed. This load capacity is the quantity of pollution (load) that the watershed can withstand while also sustaining designated [[TMDL_Beneficial_Uses|beneficial uses]]. Once calculated, the predicted pollutant load for the watershed must be validated for accuracy and precision. The product of the validation will be to assign all predictions an associated estimation of uncertainty. After the allowable pollution load is estimated, it can be divided up among the various sources in the watershed.
| + | |
| − | | + | |
| − | When evaluating linkages between pollutant sources and water quality targets, there are several points to consider:
| + | |
| − | * Given the indicator to be evaluated, availability of monitoring data, watershed/waterbody hydrology and temporal and spatial variation:
| + | |
| − | ** What scale of complexity is most appropriate for the analysis?
| + | |
| − | ** What are the advantages and disadvantages for various approaches?
| + | |
| − | * What available present and previous relevant monitoring data exists for this watershed/waterbody?
| + | |
| − | The [http://www.epa.gov/owow/tmdl/nutrient/pdf/nutrient.pdf| United States Environmental Protection Agency (EPA)] described several approaches for linkage analysis:
| + | |
| − | * [[#Approaches_to_Source_Analysis|Approaches described for Source Analysis]]
| + | |
| − | * Concentration and Response relationships (simplified systems)
| + | |
| − | * Complex simulation models including:
| + | |
| − | ** Hydrodynamic and water Quality Model for Streams (CE-QUAL-RIVI)
| + | |
| − | ** Enhanced Stream Water Quality model (QUAL2E)
| + | |
| − | **WASP5 modeling system for predicting transport and fate of pollutants in surface waters
| + | |
| − | ** EUTROMOD spreadsheet-based watershed and lake modeling system
| + | |
| − | ** PHOSMOD stratified lake phosphorous-loading model
| + | |
| − | ** BATHTUB eutrophication models for lakes and reservoirs with complex shapes
| + | |
| − | **CE-QUAL-Q2 two dimensional water quality model
| + | |
| − | ** Hydrological Simulation Program FORTRAM (HSPF)
| + | |
| − | ** CE-QUAL-ICM 3-dimentional, detailed algorithm-based water quality kinetics model
| + | |
| − | | + | |
| − | Examples of Linkage Analysis approaches employed in the Monterey Bay Region of California include:
| + | |
| − | * Pajaro River (including Llagas Creek, Rider Creek and San Benito Creek) sediment TMDL<ref
| + | |
| − | name="PajaroSedimentTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf Pajaro River Total Maximum Daily Loads for Sediment (including Llagas Creek, Rider Creek, and San Benito River), Final Report November 2005].</ref>
| + | |
| − | ** Combined suspended soil concentration into the Soil and Water Assessment Tool (SWAT) to link sediment sources to in-stream indicators, determine existing sediment loads, and evaluate optimal TMDL load reductions
| + | |
| − | ** Statistical analyses of stream bed characteristics (including pool volume and mean gravel size) to estimate watershed disturbance
| + | |
| − | * Pajaro River (including Llagas Creek) nitrate TMDL<ref
| + | |
| − | name="PajaroNitrateTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River Total Maximum Daily Loads for Nitrate (including Llagas Creek), Final ProjectReport November 2005].</ref>
| + | |
| − | ** Insufficient data collected for linkage analysis.
| + | |
| − | * Watsonville Slough pathogen TMDL <ref
| + | |
| − | name="WatsonvilleSloughPathogesTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf Watsonville Slough Total Maximum Daily Loads for Pathogens, Final Project Report Draft December 2005].</ref>
| + | |
| − | ** Incomplete linkage analysis
| + | |
| − | * Chorro Creek Nutrients and Dissolved Oxygen TMDL <ref
| + | |
| − | name="ChorroNutsDOTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0044_tmdl_project_report.pdf Chorro Creek Total Maximum Daily Loads for Nutrients and Dissolved Oxygen, Final Project Report November 2005].</ref>
| + | |
| − | ** Employed a combination of monitoring data, statistical analysis and best professional judgement
| + | |
| − | * San Luis Obispo Creek Nitrogen-as-Nitrate TMDL<ref
| + | |
| − | name="SLONitrateMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0106_slo_nut_tmdl_attach_b_proj_report.pdf San Luis Obispo Creek Total Maximum Daily Loads for Nitrogen as Nitrate, Final Project Report June 2005].</ref>
| + | |
| − | ** Linkage analysis incomplete
| + | |
| − | * Los Osos Creek, Warden Creek, and Warden Lake Wetland Nutrients TMDL<ref
| + | |
| − | name="LosOsosNutsTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2004/2004_0165_los_osos_nutr_tmdl_final_proj_report.pdf Los Osos Creek, Warden Creek, and Warden Lake Wetland Total Maximum Daily Loads for Nitrogen as Nitrate, Final Project Report June 2005].</ref>
| + | |
| − | ** Linkage analysis incomplete
| + | |
| − | * San Lorenzo River(including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL <ref
| + | |
| − | name="SanLorenzoSedTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf San Lorenzo River (including Carbonera Creek, Lompico Creek and Shingle Mill Creek)Total Maximum Daily Loads for Sediments, Project Report Draft September 2002].</ref>
| + | |
| − | ** Statistical analyses of stream bed characteristics (including pool volume, mean gravel size and percentage fines and coarse fines) to estimate watershed disturbance.
| + | |
| − | | + | |
| − | ...
| + | |
| − | | + | |
| − | === Approaches to developing Load Allocations ===
| + | |
| − | | + | |
| − | The allocations indicate the amount of pollutant reduction that is required to attain specified water quality standards. Allocations may be assigned based on land use, land area, or erosional process. The regulations at 40 Code of Federal Regulations (CFR) 130.2(g) state that “Load allocations are best estimates of the loading, which may range from reasonably accurate estimates to gross allotments, depending on the availability of data and appropriate techniques for predicting the loading.” Not all TMDL allocations are in the form of load. The regulations at 40 CFR 130.2 (i) state "a mass load of the pollutant can also be expressed as a unit of concentration."
| + | |
| − | | + | |
| − | The techniques used to allocate new water quality standards vary between TMDL's. Below is a list of some of the of various allocation techniques used in some of the central California coast TMDL's.
| + | |
| − | | + | |
| − | *Pajaro River (Including Llagas Creek) Nitrate TMDL <ref name="Pajaro River (Including Llagas Creek) Nitrate TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf
| + | |
| − | Pajaro River (Including Llagas Creek) Nitrate TMDL - Final Project Report].</ref>
| + | |
| − | **Load Allocation: The nitrate TMDL is set at a maximum concentration of 10 mg/l nitrate-N in receiving water
| + | |
| − | **Specific Sources: Load allocations of 10 mg/l nitrate-N are assigned to each source, including background and all watershed land uses
| + | |
| − | | + | |
| − | | + | |
| − | *Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL<ref name="Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf
| + | |
| − | Pajaro River (Including San Benito River, Llagas Creek and Rider Creek) Sediment TMDL - Final Project Report].</ref>
| + | |
| − | **Load Allocation:
| + | |
| − | ***Suspended Sediment: The numeric targets are based on exposure index (concentration and duration) developed by Newcombe and Jensen.
| + | |
| − | ***Stream Bed Characteristics: Numeric targets were established for four stream bed parameters. The parameters are residual pool volume, median gravel size in spawning gravels, %fine material for fine fines and %fine material for coarse spawning gravel.
| + | |
| − | **Specific Sources:
| + | |
| − | ***Suspended Sediment: Due to varying natural suspended sediment conditions through out the watershed individual sub-basins were assigned unique load allocation numbers.
| + | |
| − | ***Stream Bed Characteristics: The Pajaro River including Llagas, Rider and San Benito creeks are all considered one source. All of the listed stream bed parameters exists across the different sources.
| + | |
| − | | + | |
| − | | + | |
| − | *Watsonville Slough Pathogens TMDL<ref
| + | |
| − | name="WatsonvillePathogensTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf
| + | |
| − | Watsonville Slough Pathogens TMDL - Final Project Report, DRAFT].</ref>
| + | |
| − | **Load Allocation: The numeric target includes a maximum concentration and geometric mean. Maximum Concentration: No more than 10% of total samples during a period of 30days can exceed a fecal coliform concentration above 400 MPN/100ml. Geometric Mean: The geometric mean of no less than five samples over a period of 30 days exceed a concentration of 200 MPN/100ml.
| + | |
| − | **Specific Sources: The numeric targets apply to all samples collected in the Watsonville Slough and including Gallighan, Harkin, Hanson and Struve Sloughs.
| + | |
| − | | + | |
| − | | + | |
| − | *San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL <ref name="San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf
| + | |
| − | San Lorenzo River (Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL - Report].</ref>
| + | |
| − | **Load Allocation: Allocations are in the form annual loads.
| + | |
| − | **Specific Sources: Allocations were divided between each sub-basin (Shingle Mill Creek, Carbonera Creek, Lompico Creek and San Lorenzo River. For each sub-basin load sources were divided between Upland THP Roads, Streamside THP Roads on Steep Slopes, Upland Public/Private Roads, Streamside Public/Private Roads on Steep Slopes, THP Land, Other Urban and Rural Land, Mass Wastig and Channel/Bank Erosion.
| + | |
| − | | + | |
| − | | + | |
| − | *Las Tablas Creek and Lake Nacimiento Mercury TMDL <ref name="Las Tablas Creek and Lake Nacimiento Mercury TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0107_las_tablas_mercury_tmdl_final_proj_rpt.pdf
| + | |
| − | Las Tablas Creek and Lake Nacimiento Mercury TMDL - Draft Report].</ref>
| + | |
| − | **Load Allocations: allocations are in the form of annual load.
| + | |
| − | **Specific Sources: There are three sources that were specified, General Soils, Roads and Mines.
| + | |
| − | | + | |
| − | === Approaches to developing a Monitoring and Evaluation Plan ===
| + | |
| − | Monitoring is required to identify impaired waters, prioritize clean up plans and provide feedback on effectiveness of TMDL implementation. A monitoring and evaluation plan should indicate monitoring goals and hypotheses, parameters to monitor, the monitoring methods to use, schedule for review and potential revision, and the parties responsible for implementing the plan. The plan must contain incremental, measurable targets consistent with implementation actions and the time frame for implementing those actions. For further detail, refer to [http://www.epa.gov/owow/tmdl/nutrient/pdf/nutrient.pdf EPA Protocols document]
| + | |
| − | | + | |
| − | Several approaches to specifying a monitoring plan have been adopted in federally approved TMDLS in the Monterey Bay area.
| + | |
| − | * '''Watsonville Slough pathogen TMDL:'''<ref
| + | |
| − | name="WatsonvillePathogensTMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0025_wat_path_proj_rpt.pdf Watsonville Slough Pathogens TMDL - Final Project Report, DRAFT].</ref>
| + | |
| − | ** 8 monitoring locations specified to evaluate attainment and allocations of TMDL, 5 grab samples from each site collected over a 30 day period in early wet season, late wet season and dry season.
| + | |
| − | ** Potential sources at each location share responsibility for monitoring- City of Watsonville and Santa Cruz County stormwater outfalls and landfills, livestock operators and manure applicators.
| + | |
| − | ** Monitor for at least 3 years. Water Board will determine the need to continue or modify requirements. Monitoring results incorporated into MS4 Stormwater Permit and Waste Discharge Requirement annual reports.
| + | |
| − | * '''Pajaro River sediment TMDL:'''<ref name="Pajaro River(including SanBenito River, Llagas Creek and Rider Creek)"> [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0132_paj_sed_tmdl_attach_b_final_project_report.pdf Pajaro River(Including SanBenito River, Llagas Creek and Rider Creek)Sediment TMDL- Final Project Report].</ref>
| + | |
| − | ** No specific monitoring program exists to measure sediment numeric target.
| + | |
| − | ** Water Board staff relay on site assessment, photo documentation and annual reporting required by Agricultural Waiver Program for Irrigated Agriculture, Timber Harvest Monitoring Plan for forested land, monitoring and reporting by municipalities for Stormwater Program, and monitoring plans required for sand and gravel mining activities.
| + | |
| − | ** Monitoring plan needs to be developed within 5 years and will build upon existing monitoring. Monitoring data reviewed every 3 years for regional stormwater permit. Additional monitoring can be requested under section 13383 of California Water Code.
| + | |
| − | * '''Pajaro River nitrate TMDL:''' <ref name="Pajaro River(Including Llagas Creek)Nitrate TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River Nitrate(Including Llagas Creek)TMDL-Final Project Report].</ref>
| + | |
| − | ** Monitoring plan measures progress of attaining nitrate TMDL target and evaluates impairment due to excessive algae and low dissolved oxygen.
| + | |
| − | ** For Irrigated lands, landowners are resposible for monitoring nitrate under Agricultural Conditional Waiver. South County Wastewater Authority monitors nitrate according to Wastewater Discharge Requirements.
| + | |
| − | ** Water Board staff will develop and conduct algae and dissolved oxygen monitoring plan, including chemical, physical and biological data collection. Monitoring will be designed to determine what metric should be used to evaluate excessive algae, what level of algae should be considered excessive, what is the frequency, duration and spatial extent of algae, what are contributing factors to algal growth, does algae impair beneficial uses, and are low dissolved oxygen conditions a result of algae or other chemical or physical characteristics.
| + | |
| − | ** Monitoring results reviewed every 3 years. If studies result in improved information to evaluate exceedence algae, numeric targets for algae impairment will be set and if appropriate, a separate TMDL to address algal growth and low dissolved oxygen.
| + | |
| − | ** If data do not show algal exceedence and nitrate numeric targets and allocations are attained, waterbody will be de-listed for nutrient impairment.
| + | |
| − | * '''San Lorenzo Rver sediment TMDL:''' <ref name="San Lorenzo River(Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek)Sediment TMDL">[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2002/2002_0063_slr_sed_tmdl_proj_rpt.pdf San Lorenzo River(Including Carbonera Creek, Lompico Creek, and Shingle Mill Creek) Sediment TMDL-Report].</ref>
| + | |
| − | ** Monitoring plan is designed to determine numeric targets are met, to track completion of implementation actions and to expand information upon which future actions will be based.
| + | |
| − | ** Santa Cruz County is responsible for monitoring effectiveness of erosion controls and physical factors influencing local sedimentation and salmonid habitat quality.
| + | |
| − | ** City of Santa Cruz Water Department and San Lorenzo Water District are responsible for conducting continuous turbidity trend monitoring.
| + | |
| − | ** Numeric target monitoring takes place at mouths of tributaries, at monthly intervals during low flow conditions.Bed sedimentation, stream geomorphology, bank erosion and stream flow is monitored in mainstem and tributaries at intervals of 1 to 5 years.
| + | |
| − | ** Monitoring of sediment and habitat-related parameters are coordinated through the county-led San Lorenzo River Technical Advisory Committee (TAC). TAC reviews data annually and evaluates effectiveness of existing implementation efforts.
| + | |
| − | ** Every 3 years Rgional Water Board staff reviews monitoring data, determines TMDL compliance and considers changes to monitoring.
| + | |
| − | The following organizations have contributed monitoring data for Monterey Bay area:
| + | |
| − | * [http://www.ccamp.org Central Coast Ambient Monitoring Program (CCAMP)]
| + | |
| − | * [http://www.coastal-watershed.org/Programs/Snapshot_Day/index.htm Coastal Watershed Council (CWC) Snap Shot Day]
| + | |
| − | * [http://www.coastal-watershed.org/Programs/Clean_Streams/index.htm CWC Clean Streams Project]
| + | |
| − | * [http://nerrs.noaa.gov/Monitoring/ National Estuarine Research Reserve Monitoring Program (NERRMP)]
| + | |
| − | * [http://www.cclean.org/ Central Coast Long Term Environmental Assessment Program (CCLEAN)]
| + | |
| − | * [http://ccows.csumb.edu/home/ Central Coast Watershed Studies (CCOWS)]
| + | |
| − | * [http://www.ccwqp.org/ Central Coast Water Quality Preservation, Inc.(CCWQP) Northern and Southern Area Ag-Waiver Monitoring]
| + | |
| − | * [http://www.cdph.ca.gov/Pages/default.aspx Department of Health Services]
| + | |
| − | * [http://www.cdpr.ca.gov/ Department of Pesticide Regulation]
| + | |
| − | * [http://csc-s-maps-q.csc.noaa.gov/legislativeatlas/lawDetails.jsp?lawID=117 State Mussel Watch]
| + | |
| − | * [http://csc-s-maps-q.csc.noaa.gov/legislativeatlas/lawDetails.jsp?lawID=117 State Toxic Substances Monitoring]
| + | |
| − | * [http://www.waterboards.ca.gov/water_issues/programs/bptcp/ Bay Protection and Toxic Cleanup Program]
| + | |
| − | | + | |
| − | === Approaches to developing Implementation Plans ===
| + | |
| − | | + | |
| − | Summarize approaches that have been used in TMDLs approved so far.
| + | |
| − | | + | |
| − | ...
| + | |
| − | | + | |
| − | == References == | + | |
| | | | |
| | <references/> | | <references/> |
| | | | |
| − | == Links == | + | ==See also== |
| | + | * [[Central Coast Region Agricultural Waiver]] |
| | + | * [[Central Coast Regional Water Quality Control Board (CCRWQCB)]] |
| | + | * [[TMDL]] |
| | + | * [[Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents]] |
| | + | * [[Monterey Bay Area TMDL Listings | Table of 303d Listed Waters in Monterey Bay Region]] |
| | + | * [[Approaches to TMDL Development and Implementation in the Monterey Bay Area]] |
| | + | * [[TMDL for Fecal Coliform for the Lower Salinas River Watershed, Monterey County, California]] |
| | + | * [[TMDL for Nutrients in Lower Salinas River Watershed, Monterey County, California]] |
| | + | * [[TMDL for Chlorpyrifos and Diazinon in Lower Salinas River Watershed, Monterey County, California]] |
| | + | * [[Monterey Bay Area TMDL Listings| Table of 303d Listed Waters in Monterey Bay Region]] |
| | + | * [[ENVS 560/L Watershed Systems]] class |
| | + | * [[Lower Salinas River Watershed Nutrient TMDL - Implementation and Monitoring Progress]] |
| | + | * [[Water Quality Control Plan for the Central Coast Region]] |
| | | | |
| − | * [[ENVS 560/L Watershed Systems]] class
| + | ==Disclaimer== |
| − | * ...
| + | This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of [[CSUMB]], its staff, or students. |
States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the 303d list. A remediation plan must then be developed and implemented for each impaired water body listed.
The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.[1]
Please see the following pages for information on 303(d) listed waterbodies and their impairments in the Monterey Bay region.
This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of CSUMB, its staff, or students.
