Appears in 1 contract

Laboratory Analysis. All laboratory analyses shall be performed at a ~~DWR~~ DWR-certified laboratory using approved methods as prescribed by section 40 of the Code of Federal Regulations part 136 (40CFR136) or other methods certified by the DWR Laboratory Certification Branch (~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home-~~ xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences- home-page/laboratory-certification-branch/non-field-lab-certification) or the Director of DWR. 40CFR136 can be accessed on the web ~~at xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water- sciences-home-page/laboratory-certification-branch/rules-regulations~~at: xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/rules. Reporting levels will be at least as stringent as the reporting levels used by the DWR Laboratory. For guidance purposes Table B-1 lists target reporting levels for each parameter based on the reporting levels of the DWR Laboratory. The lowest possible analytical limits for all the parameters should be pursued. TABLE ~~B-1~~ B-1: DWR Laboratory Reporting Limits Parameters Target Reporting Level Comments Water Temperature Resolution to 0.1 degree Celsius Dissolved Oxygen Report results to the nearest 0.1 mg/L. pH Meters should be calibrated to measure a pH range of at least 4.01 to 9.18. Report results to the nearest 0.1 pH units. Specific Conductivity Report results to the nearest whole µmho/cm at 25 ºC. Turbidity 1.0 NTU TSS 6.2 mg/L Fecal Coliform 1 colony/100 mL At least 3 dilutions should be used to achieve optimum colony counts per membrane filter of 20-60 colonies. Chlorophyll a 1 µg/L Report ~~Chlorophyll~~ chlorophyll a values free from pheophytin and other chlorophyll pigments. Analysis by HPLC is not approved by DWR. Ammonia (NH3 as N) 0.02 mg/L Address distillation requirement. See 40CFR136 Table II footnote. Nitrate + Nitrite as N 0.02 mg/L Total Kjeldahl Nitrogen as N 0.20 mg/L Total Phosphorus as P 0.02 mg/L ~~RLs current as of 1/11/2016~~ Data Qualification Codes When reporting data, the DWR’s data qualifier codes must be used to provide additional information regarding data quality and interpretation. The current set of qualifier codes to be used is provided in Table B-2. Review the data remark codes at least annually and utilize the most current set, as codes are subject to change. A copy of this table can be found at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page~~xxxxx://xxxxxx.x0.xxxxxxxxx.xxx/s3fs- public/~~microbiology-inorganics-branch~~Water%20Quality/~~methods-pqls-qa~~Coalition%20Program/DataQualifiers12.2011.pdf. ~~Table B-2~~ TABLE B-2: Data Remark Codes for Use with Coalition Data Data Remark Code Code Definition A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field duplicates, different dilutions of the same sample). This code is not required for BOD, coliform or acute/chronic metals reporting since averaging multiple results for these parameters is fundamental to those methods or manner of reporting. A1. The reported value is an average, where at least one result is qualified with a “U”. The PQL is used for the qualified result(s) to calculate the average. B Results are based upon colony counts outside the acceptable range and should be used with caution. This code applies to microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was analyzed and the colony count is generated from a plate in which the number of coliform colonies exceeds the ideal ranges indicated by the method. These ideal ranges are defined in the method as: Fecal coliform bacteria: 20-60 colonies Total coliform bacteria: 20-80 colonies B1. Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters reported per 100 mL. B2. Counts from all filters were zero. The value reported is based on the number of colonies per 100 mL that would have been reported if there had been one colony on the filter representing the largest filtration volume (reported as a less than "<" value). B3. Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the smallest volume filtered and reported as a greater than ">" value. B4. Filters have counts of both >60 or 80 and <20. Reported value is a total of the counts from all countable filters reported per 100 mL. B5. Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as > 150 colonies. The numeric value represents the maximum number of counts typically accepted on a filter membrane (60 for fecal and 80 for total), multiplied by 100 and then divided by the smallest filtration volume analyzed. This number is reported as a greater than value. B6. Estimated Value. Blank contamination evident. B7. Many non-coliform colonies or interfering non-coliform growths are present. In this competitive situation, the reported coliform value may under-represent actual coliform density. C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated. Generally applies to cyanide, phenol, NH3, TKN, coliform, and organics) Data Remark Code Code Definition G A single quality control failure occurred during biochemical oxygen demand (BOD) analysis. The sample results should be used with caution. G1. The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L. G2. The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. G3. No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. G4. Evidence of toxicity was present. This is generally characterized by a significant increase in the BOD value as the sample concentration decreases. The reported value is calculated from the highest dilution representing the maximum loading potential and should be considered an estimated value. G5. The glucose/glutamic acid standard exceeded the range of 198 30.5 mg/L. G6. The calculated seed correction exceeded the range of 0.6 to 1.0 mg/L. G7. Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value and is calculated for the dilution using the least amount of sample. G8. Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is calculated for the dilution using the most amount of sample. G9. The DO depletion of the dilution water blank produced a negative value. J Estimated value; value may not be accurate. This code is to be used in the following instances: J1. Surrogate recovery limits have been exceeded; J2. The reported value failed to meet the established quality control criteria for either precision or accuracy; J3. The sample matrix interfered with the ability to make any accurate determination; J4. The data is questionable because of improper laboratory or field protocols (e.g. composite sample was collected instead of grab, plastic instead of glass container) J5. Temperature limits exceeded (samples frozen or >6° C) during transport or not verifiable (e.g., no temperature blank provided);, non-reportable for NPDES compliance monitoring. J6. The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate. J7. This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical instrument/method. The reported value should be considered estimated. J8. Temperature limits exceeds (samples frozen or >6°C during storage. The data may not be accurate. Data Remark Code Code Definition J9. The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. J10. Unidentified peak; estimated value. J11. The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. This code is used when an MDL has not been established for the analyte in question. J12. The calibration verification did not meet the calibration acceptance criterion for field parameters. Note: A "J" value shall not be used if another code applies (ex. N, V, M). M Sample and duplicate results are "out of control." The sample is non-homogenous (e.g. VOA soil). The reported value is the lower value of duplicate analyses of a sample. N Presumptive evidence of presence of material; estimated value. This code is to be used if: N1. The component has been tentatively identified based on mass spectral library search; N2. There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e., presence of analyte was not confirmed by alternate procedures). N3. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. This code is not routinely used for most analyses. N4. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory practical quantitation limit and greater than the instrument noise level. This code is used when an MDL has not been established for the analyte in question.N5. The component has been tentatively identified based on a retention time standard. P Elevated practical quantitation limit (PQL)* due to matrix interference and/or sample dilution. Q Holding time exceeded. These codes shall be used if the value is derived from a sample that was received, prepared and/or analyzed after the approved holding time restrictions for sample preparation and analysis. The value does not meet NPDES requirements.Q1. Holding time exceeded prior to receipt by lab Q2. Holding time exceeded following receipt by lab S Not enough sample provided to prepare and/or analyze a method-required matrix spike (MS) and/or duplicate (MSD). Data Remark Code Code Definition U Indicates that the analyte was analyzed for but not detected above the reported practical quantitation limit (PQL)*. The number value reported with the "U" qualifier is equal to the laboratory’s PQL*. V Indicates the analyte was detected in both the sample and the associated method blank. Note: The value in the blank shall not be subtracted from the associated samples. V1. The analyte was detected in both the sample and the method blank.V2. The analyte was detected in both the sample and the field blank. X Sample not analyzed for this constituent. This code is to be used if: X1. Sample not screened for this compound. X2. Sampled, but analysis lost or not performed-field errorX3. Sampled, but analysis lost or not performed-lab error Y Elevated PQL* due to insufficient sample size Z The presence or absence of the analyte cannot be verified. The sample analysis/results are not reported due to:Z1. Inability to analyze the sample.Z2. Questions concerning data reliability. Supporting Definitions MDL A Method Detection Limit (MDL) is defined as the minimum concentration of a substance that can be measured and reported with 99 percent confidence that the true value is greater than zero and is determined in accordance with 40 CFR Part 136, Appendix B. ML Minimum Levels are used in some EPA methods. A Minimum Level (ML) is the lowest level at which the entire analytical system must give a recognizable signal and acceptable calibration point for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that all method-specified sample weights, volumes and cleanup procedures have been employed. The ML is calculated by multiplying the MDL by 3.18 and rounding the result to the nearest factor of 10 multiple (i.e., 1, 2, or 5). For example, MDL = 1.4 mg/L; ML = 1.4 mg/L x 3.18 = 4.45 rounded to the nearest factor of 10 multiple (i.e., 5) = 5.0 mg/L. PQL The Practical Quantitation Limit (PQL) is defined as the lowest concentration that can be reliably achieved within specified limits of precision and accuracy during routine laboratory operating conditions. PQLs are subjectively set at some multiple of typical MDLs for reagent water (generally 3 to 10 times the MDL depending upon the parameter or analyte and based on the analyst’s best professional judgement, the quality and age of the instrument and the nature of the samples) rather than explicitly determined. PQLs may be nominally chosen within these guidelines to simplify data reporting and, where applicable, are generally equal to the concentration of the lowest non-zero standard in the calibration curve. PQLs are adjusted for Data Remark Code Code Definition sample size, dilution and % moisture. For parameters that are not amenable to MDL studies, the PQL may be defined by the sample volume and buret graduations for titrations or by minimum measurement values set by the method for method-defined parameters (e.g., BOD requires a minimum DO depletion of 2.0 mg/L, fecal coliform requires a minimum plate count of 20 cfu, total suspended residue requires a minimum weight gain of 2.5 mg, etc.). Additionally, some EPA methods prescribe MLs and the lab may set the PQL equal to this method-stated ML. Determination of PQL is fully described in the laboratory’s analytical Standard Operating Procedure (SOP) document.

Appears in 1 contract

Samples: Memorandum of Agreement

Laboratory Analysis. All laboratory analyses shall be performed at a DWR certified laboratory using approved methods as prescribed by section 40 of the Code of Federal Regulations part 136 (40CFR136) or other methods certified by the DWR Laboratory Certification Branch (xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/laboratory-certification-branch) or the Director of DWR. 40CFR136 can be accessed on the web at xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water- sciences-home-page/laboratory-certification-branch/rules-regulations. Reporting levels will be at least as stringent as the reporting levels used by the DWR Laboratory. For guidance purposes Table B-1 lists target reporting levels for each parameter based on the reporting levels of the DWR Laboratory. The lowest possible analytical limits for all the parameters should be pursued. TABLE B-1 DWR Laboratory Reporting Limits ~~Parameters Target Reporting Level Comments~~ Water Temperature Resolution to 0.1 degree Celsius Dissolved Oxygen Report results to the nearest 0.1 mg/L. pH ~~Meters should be calibrated to measure a pH range of at least 4.01 to 9.18.~~ Report results to the nearest 0.1 pH units. Specific Conductivity Report results to the nearest whole µmho/cm at 25 ºC. Turbidity 1.0 NTU TSS 6.2 mg/L Fecal Coliform 1 colony/100 mL At least 3 dilutions should be used to achieve optimum colony counts per membrane filter of 20-60 colonies. Chlorophyll a 1 µg/L Report Chlorophyll a values free from pheophytin and other chlorophyll pigments. Analysis by HPLC is not approved by DWR. Ammonia (NH3 as N) 0.02 mg/L Address distillation requirement. See 40CFR136 Table II footnote. Nitrate + Nitrite as N 0.02 mg/L Total Kjeldahl Nitrogen as N 0.20 mg/L Total Phosphorus as P 0.02 mg/L ~~RLs current as of 1/11/2016~~ Total Arsenic 2.0 µg/L Total Selenium 1.0 µg/L Total Mercury 1.00 ng/L Total Chromium 5.0 µg/L Dissolved Lead 2.0 µg/L Dissolved Cadmium 0.50 µg/L Dissolved Copper 2.0 µg/L Dissolved Zinc 10 µg/L Chloride 1.0 mg/L Hardness 1.0 mg/L Data Qualification Codes When reporting data, the DWR’s data qualifier codes must be used to provide additional information regarding data quality and interpretation. The current set of qualifier codes to be used is provided in Table B-2. Review the data remark codes at least annually and utilize the most current set, as codes are subject to change. A copy of this table can be found at xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/microbiology-inorganics-branch/methods-pqls-qa. Table B-2 Data Remark Codes for Use with Coalition Data ~~Data Remark Code Code~~ Symbol Definition A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field duplicates, different dilutions of the same sample). This code is not required for BOD, coliform or acute/chronic metals reporting since averaging multiple results for these parameters is fundamental to those methods or manner of reporting. ~~A1.~~ 1 The reported value is an average, where at least one result is qualified with a “U”. The PQL is used for the qualified result(s) to calculate the average. B Results ~~are~~ based upon colony counts outside the acceptable range and should be used with caution. This code applies to microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was analyzed and the colony count is generated from a plate in which the number of ~~coliform~~ colonies exceeds the ideal ranges indicated by the method. These ideal ranges are defined in the method as: Fecal coliform or Enterococcus bacteria: 20-60 colonies Total coliform bacteria: 20-80 colonies ~~B1.~~ 1 Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters reported per 100 ~~mL. B2~~ml. 2 Counts from all filters were zero. The value reported is based on the number of colonies per 100 mL ml that would have been reported if there had been one colony on the filter representing the largest filtration volume (reported as a less than "<" value). 3 Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the smallest volume filtered and reported as a greater than ">" value. 4 Filters have counts of both >60 or 80 and <20. Reported value is estimated or is a total of the counts on all filters reported per 100 ml. 5 Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as >150 colonies. The numeric value represents the maximum number of counts typically accepted on a filter membrane (60 for fecal or enterococcus and 80 for total), multiplied by 100 and then divided by the smallest filtration volume analyzed. This number is reported as a greater than value. 6 Estimated Value. Blank contamination evident. 7 Many non-coliform or non-enterococcus colonies or interfering non-coliform or non-enterococcus growth present. In this competitive situation, the reported value may under- represent actual density. Note: A "B" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., B1, B2, etc.). Note: A “J2” should be used for spiking failures. C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated. Generally applies to cyanide, phenol, NH3, TKN, coliform, and organics. Symbol Definition G A single quality control failure occurred during biochemical oxygen demand (BOD) analysis. The sample results should be used with caution. 1 The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L. 2 The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. 3 No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. 4 Evidence of toxicity was present. This is generally characterized by a significant increase in the BOD value as the sample concentration decreases. The reported value is calculated from the highest dilution representing the maximum loading potential and should be considered an estimated value. 5 The glucose/ glutamic acid standard exceeded the range of 198 ± 30.5 mg/L. 6 The calculated seed correction exceeded the range of 0.6 to 1.0 mg/L. 7 Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value and is calculated for the dilution using the least amount of sample. 8 Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is calculated for the dilution using the most amount of sample. 9 The DO depletion of the dilution water blank produced a negative value. The cBOD value is greater than the BOD value. Note: A "G" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., G1, G2, etc.). J Estimated value; value may not be accurate. This code is to be used in the following instances: 1 Surrogate recovery limits have been exceeded. 2 The reported value failed to meet the established quality control criteria for either precision or accuracy. 3 The sample matrix interfered with the ability to make any accurate determination. 4 The data is questionable because of improper laboratory or field protocols (e.g., composite sample was collected instead of grab, plastic instead of glass container, etc.). 5 Temperature limits exceeded (samples frozen or >6°C) during transport or not verifiable (e.g., no temperature blank provided): non-reportable for NPDES compliance monitoring. 6 The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate. 7 This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical instrument/method. The reported value should be considered estimated. 8 Temperature limits exceeded (samples frozen or >6ºC) during storage, the data may not be accurate. 9 The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory PQL and greater than the laboratory method detection limit. 10 Unidentified peak; estimated value. 11 The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory PQL and greater than the instrument noise level. This code is used when an MDL has not been established for the analyte in question. 12 The calibration verification did not meet the calibration acceptance criterion for field parameters. Note: A "J" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., J1, J2, etc.). A "J" value shall not be used if another code applies (e.g., N, V, M). M Sample and duplicate results are "out of control". The sample is non-homogenous (e.g., VOA soil). The reported value is the lower value of duplicate analyses of a sample. Symbol Definition N Presumptive evidence of presence of material; estimated value. This code is to be used if: 1 The component has been tentatively identified based on mass spectral library search. 2 There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e., presence of analyte was not confirmed by alternate procedures). 3 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory PQL and greater than the laboratory method detection limit. This code is not routinely used for most analyses. 4 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory practical quantitation limit and greater than the instrument noise level. This code is used when an MDL has not been established for the analyte in question. 5 The component has been tentatively identified based on a retention time standard. Q Holding time exceeded. These codes shall be used if the value is derived from a sample that was received, prepared and/or analyzed after the approved holding time restrictions for sample preparation and analysis. The value does not meet NPDES requirements. 1 Holding time exceeded prior to receipt by lab. 2 Holding time exceeded following receipt by lab. P Elevated PQL due to matrix interference and/or sample dilution. S Not enough sample provided to prepare and/or analyze a method-required matrix spike (MS) and/or matrix spike duplicate (MSD). U Indicates that the analyte was analyzed for, but not detected above the reported PQL. The number value reported with the "U" qualifier is equal to the laboratory's PQL*. UU Indicates that the analyte was not detected by a screen analysis. The number value reported with the "UU" qualifier is equal to the laboratory's PQL. The number value was determined by a one-point estimation at the PQL, rather than against a regression equation. V Indicates the analyte was detected in both the sample and the associated blank. Note: The value in the blank shall not be subtracted from the associated samples. 1 The analyte was detected in both the sample and the method blank. 2 The analyte was detected in both the sample and the field blank. X Sample not analyzed for this constituent. This code is to be used if: 1 Sample not screened for this compound. 2 Sampled, but analysis lost or not performed-field error. 3 Sampled, but analysis lost or not performed-lab error. Note: an "X" value shall be accompanied by justification for its use by the numbers listed. Y Elevated PQL due to insufficient sample size. Z The sample analysis/results are not reported due to: 1 Inability to analyze the sample. 2 Questions concerning data reliability. Note: The presence or absence of the analyte cannot be verified. Supporting Definitions listed below MDL A Method Detection Limit (MDL) is defined as the minimum concentration of a substance that can be measured and reported with 99 percent confidence that the true value is greater than zero and is determined in accordance with 40 CFR Part 136, Appendix B. ML Minimum Levels are used in some EPA methods. A Minimum Level (ML) is the lowest level at which the entire analytical system must give a recognizable signal and acceptable calibration point for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that all method - specified sample weights, volumes, and cleanup procedures have been employed. The ML is calculated by multiplying the MDL by 3.18 and rounding the result to the nearest factor of 10 multiple (i.e., 1, 2, or 5). For example, MDL = 1.4 mg/L; ML = 1.4 mg/L x 3.18 = 4.45 rounded to the nearest factor of 10 multiple (i.e., 5) = 5.0 mg/L. Supporting Definitions listed below PQL The Practical Quantitation Limit (PQL) is defined as the lowest concentration that can be reliably achieved within specified limits of precision and accuracy during routine laboratory operating conditions. PQLs are subjectively set at some multiple of typical MDLs for reagent water (generally 3 to 10 times the MDL depending upon the parameter or analyte and based on the analyst’s best professional judgement, the quality and age of the instrument and the nature of the samples) rather than explicitly determined. PQLs may be nominally chosen within these guidelines to simplify data reporting and, where applicable, are generally equal to the concentration of the lowest non-zero standard in the calibration curve. PQLs are adjusted for sample size, dilution and % moisture. For parameters that are not amenable to MDL studies, the PQL may be defined by the sample volume and buret graduations for titrations or by minimum measurement values set by the method for method-defined parameters (e.g., BOD requires a minimum DO depletion of 2.0 mg/L, fecal coliform requires a minimum plate count of 20 cfu, total suspended residue requires a minimum weight gain of 2.5 mg, etc.). Additionally, some EPA methods prescribe Minimum Levels (MLs) and the lab may set the PQL equal to this method-stated ML. Determination of PQL is fully described in the laboratory’s analytical Standard Operating Procedure (SOP) document. Data remark codes are current February 27, 2018 DATA FORMAT AND REPORTING REQUIREMENTS This page was intentionally left blank.

Appears in 1 contract

Samples: Memorandum of Agreement

Laboratory Analysis. All laboratory analyses shall be performed at a ~~DWR~~ DWR-certified laboratory using approved methods as prescribed by section 40 of the Code of Federal Regulations part 136 (40CFR136) or other methods certified by the DWR Laboratory Certification Branch (~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home-~~ xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences- home-page/laboratory-certification-branch/non-field-lab-certification) or the Director of DWR. 40CFR136 can be accessed on the web ~~at xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water- sciences-home-page/laboratory-certification-branch/rules-regulations~~at: xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/rules. Reporting levels will be at least as stringent as the reporting levels used by the DWR Laboratory. For guidance purposes Table B-1 lists target reporting levels for each parameter based on the reporting levels of the DWR Laboratory. The lowest possible analytical limits for all the parameters should be pursued. TABLE ~~B-1~~ B-1: DWR Laboratory Reporting Limits Parameters Target Reporting Level Comments Water Temperature Resolution to 0.1 degree Celsius Dissolved Oxygen Report results to the nearest 0.1 mg/L. pH Meters should be calibrated to measure a pH range of at least 4.01 to 9.18. Report results to the nearest 0.1 pH units. Specific Conductivity Report results to the nearest whole µmho/cm at 25 ºC. Turbidity 1.0 NTU TSS 6.2 mg/L Fecal Coliform 1 colony/100 mL At least 3 dilutions should be used to achieve optimum colony counts per membrane filter of 20-60 colonies. Chlorophyll a 1 µg/L Report ~~Chlorophyll~~ chlorophyll a values free from pheophytin and other chlorophyll pigments. Analysis by HPLC is not approved by DWR. Ammonia (NH3 as N) 0.02 mg/L Address distillation requirement. See 40CFR136 Table II footnote. Nitrate + Nitrite as N 0.02 mg/L Total Kjeldahl Nitrogen as N 0.20 mg/L Total Phosphorus as P 0.02 mg/L ~~RLs current as of 1/11/2016~~ Data Qualification Codes When reporting data, the DWR’s data qualifier codes must be used to provide additional information regarding data quality and interpretation. The current set of qualifier codes to be used is provided in Table B-2. Review the data remark codes at least annually and utilize the most current set, as codes are subject to change. A copy of this table can be found at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page~~xxxxx://xxxxxx.x0.xxxxxxxxx.xxx/s3fs- public/~~microbiology-inorganics-branch~~Water%20Quality/~~methods-pqls-qa~~Coalition%20Program/DataQualifiers12.2011.pdf. ~~Table B-2~~ TABLE B-2: Data Remark Codes for Use with Coalition Data Data Remark Code Code Definition A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field duplicates, different dilutions of the same sample). This code is not required for BOD, coliform or acute/chronic metals reporting since averaging multiple results for these parameters is fundamental to those methods or manner of reporting. A1. The reported value is an average, where at least one result is qualified with a “U”. The PQL is used for the qualified result(s) to calculate the average. B Results are based upon colony counts outside the acceptable range and should be used with caution. This code applies to microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was analyzed and the colony count is generated from a plate in which the number of coliform colonies exceeds the ideal ranges indicated by the method. These ideal ranges are defined in the method as: Fecal coliform bacteria: 20-60 colonies Total coliform bacteria: 20-80 colonies B1. Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters reported per 100 mL. B2. Counts from all filters were zero. The value reported is based on the number of colonies per 100 mL that would have been reported if there had been one colony on the filter representing the largest filtration volume (reported as a less than "<" value). B3. Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the smallest volume filtered and reported as a greater than ">" value. B4. Filters have counts of both >60 or 80 and <20. Reported value is a total of the counts from all countable filters reported per 100 mL. B5. Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as > 150 colonies. The numeric value represents the maximum number of counts typically accepted on a filter membrane (60 for fecal and 80 for total), multiplied by 100 and then divided by the smallest filtration volume analyzed. This number is reported as a greater than value. B6. Estimated Value. Blank contamination evident. B7. Many non-coliform colonies or interfering non-coliform growths are present. In this competitive situation, the reported coliform value may under-represent actual coliform density. C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated. Generally applies to cyanide, phenol, NH3, TKN, coliform, and organics) Data Remark Code Code Definition G A single quality control failure occurred during biochemical oxygen demand (BOD) analysis. The sample results should be used with caution. G1. The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L. G2. The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. G3. No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L. G4. Evidence of toxicity was present. This is generally characterized by a significant increase in the BOD value as the sample concentration decreases. The reported value is calculated from the highest dilution representing the maximum loading potential and should be considered an estimated value. G5. The glucose/glutamic acid standard exceeded the range of 198± 30.5 mg/L. G6. The calculated seed correction exceeded the range of 0.6 to 1.0 mg/L. G7. Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value and is calculated for the dilution using the least amount of sample.G8. Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is calculated for the dilution using the most amount of sample. G9. The DO depletion of the dilution water blank produced a negative value. J Estimated value; value may not be accurate. This code is to be used in the following instances: J1. Surrogate recovery limits have been exceeded; J2. The reported value failed to meet the established quality control criteria for either precision or accuracy; J3. The sample matrix interfered with the ability to make any accurate determination; J4. The data is questionable because of improper laboratory or field protocols (e.g. composite sample was collected instead of grab, plastic instead of glass container) J5. Temperature limits exceeded (samples frozen or >6° C) during transport or not verifiable (e.g., no temperature blank provided);, non-reportable for NPDES compliance monitoring. J6. The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate. J7. This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical instrument/method. The reported value should be considered estimated. J8. Temperature limits exceeds (samples frozen or >6°C during storage. The data may not be accurate. Data Remark Code Code Definition J9. The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. J10. Unidentified peak; estimated value. J11. The reported value is determined by a one-point estimation rather than against a regression equation. The estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. This code is used when an MDL has not been established for the analyte in question. J12. The calibration verification did not meet the calibration acceptance criterion for field parameters. Note: A "J" value shall not be used if another code applies (ex. N, V, M). M Xxxxxx and duplicate results are "out of control." The sample is non-homogenous (e.g. VOA soil). The reported value is the lower value of duplicate analyses of a sample. N Presumptive evidence of presence of material; estimated value. This code is to be used if: N1. The component has been tentatively identified based on mass spectral library search; N2. There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e., presence of analyte was not confirmed by alternate procedures). N3. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. This code is not routinely used for most analyses. N4. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the laboratory practical quantitation limit and greater than the instrument noise level. This code is used when an MDL has not been established for the analyte in question.N5. The component has been tentatively identified based on a retention time standard. P Elevated practical quantitation limit (PQL)* due to matrix interference and/or sample dilution. Q Holding time exceeded. These codes shall be used if the value is derived from a sample that was received, prepared and/or analyzed after the approved holding time restrictions for sample preparation and analysis. The value does not meet NPDES requirements. Q1. Holding time exceeded prior to receipt by lab Q2. Holding time exceeded following receipt by lab S Not enough sample provided to prepare and/or analyze a method-required matrix spike (MS) and/or duplicate (MSD). Data Remark Code Code Definition U Indicates that the analyte was analyzed for but not detected above the reported practical quantitation limit (PQL)*. The number value reported with the "U" qualifier is equal to the laboratory’s PQL*. V Indicates the analyte was detected in both the sample and the associated method blank. Note: The value in the blank shall not be subtracted from the associated samples. V1. The analyte was detected in both the sample and the method blank.V2. The analyte was detected in both the sample and the field blank. X Sample not analyzed for this constituent. This code is to be used if: X1. Sample not screened for this compound. X2. Sampled, but analysis lost or not performed-field errorX3. Sampled, but analysis lost or not performed-lab error Y Elevated PQL* due to insufficient sample size Z The presence or absence of the analyte cannot be verified. The sample analysis/results are not reported due to:Z1. Inability to analyze the sample.Z2. Questions concerning data reliability. Supporting Definitions MDL A Method Detection Limit (MDL) is defined as the minimum concentration of a substance that can be measured and reported with 99 percent confidence that the true value is greater than zero and is determined in accordance with 40 CFR Part 136, Appendix B. ML Minimum Levels are used in some EPA methods. A Minimum Level (ML) is the lowest level at which the entire analytical system must give a recognizable signal and acceptable calibration point for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that all method-specified sample weights, volumes and cleanup procedures have been employed. The ML is calculated by multiplying the MDL by 3.18 and rounding the result to the nearest factor of 10 multiple (i.e., 1, 2, or 5). For example, MDL = 1.4 mg/L; ML = 1.4 mg/L x 3.18 = 4.45 rounded to the nearest factor of 10 multiple (i.e., 5) = 5.0 mg/L. PQL The Practical Quantitation Limit (PQL) is defined as the lowest concentration that can be reliably achieved within specified limits of precision and accuracy during routine laboratory operating conditions. PQLs are subjectively set at some multiple of typical MDLs for reagent water (generally 3 to 10 times the MDL depending upon the parameter or analyte and based on the analyst’s best professional judgement, the quality and age of the instrument and the nature of the samples) rather than explicitly determined. PQLs may be nominally chosen within these guidelines to simplify data reporting and, where applicable, are generally equal to the concentration of the lowest non-zero standard in the calibration curve. PQLs are adjusted for Data Remark Code Code Definition sample size, dilution and % moisture. For parameters that are not amenable to MDL studies, the PQL may be defined by the sample volume and buret graduations for titrations or by minimum measurement values set by the method for method-defined parameters (e.g., BOD requires a minimum DO depletion of 2.0 mg/L, fecal coliform requires a minimum plate count of 20 cfu, total suspended residue requires a minimum weight gain of 2.5 mg, etc.). Additionally, some EPA methods prescribe MLs and the lab may set the PQL equal to this method-stated ML. Determination of PQL is fully described in the laboratory’s analytical Standard Operating Procedure (SOP) document.

Appears in 1 contract

Samples: Memorandum of Agreement

Appears in 1 contract

Samples: Memorandum of Agreement

Appears in 1 contract

Samples: Memorandum of Agreement

Laboratory Analysis. All laboratory analyses shall be performed at a ~~DWR~~ DWQ certified laboratory using approved methods as prescribed by section 40 of the Code of Federal Regulations part 136 (~~40CFR136~~40 CFR part 136) or other methods certified by the ~~DWR~~ DWQ Laboratory Certification Branch (~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/laboratory-certification-branch~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/methods) or the Director of ~~DWR~~DWQ. ~~40CFR136~~ 40 CFR Part 136 can be accessed on the web at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water- sciences-home-page/laboratory-certification-branch/rules-regulations~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/rules. Reporting levels will be at least as stringent as the reporting levels used by the ~~DWR~~ DWQ Laboratory. For guidance purposes Table B-1 lists target reporting levels for each parameter based on the reporting levels of the ~~DWR~~ DWQ Laboratory. The lowest possible analytical limits for all the parameters should be pursued. TABLE B-1 ~~DWR~~ DWQ Laboratory Reporting Limits Parameters Target Reporting Level Comments ~~Water~~ Temperature Resolution to 0.1 degree ~~Celsius~~ Celsius. Dissolved Oxygen Report results to the nearest 0.1 mg/L. pH ~~Meters should be calibrated to measure a pH range of at least 4.01 to 9.18.~~ Report results to the nearest 0.1 ~~pH units~~SU. Specific ~~Conductivity~~ Conductance Report results to the nearest whole µmho/cm at 25 ºC. Turbidity 1.0 NTU TSS ~~6.2~~ 2.5 mg/L Fecal Coliform 1 colony/100 mL At least 3 dilutions should be used to achieve optimum colony counts per membrane filter of 20-60 colonies. Chlorophyll a 1 µg/L Report Chlorophyll a values free from pheophytin and other chlorophyll pigments. Analysis by HPLC is not approved by ~~DWR~~DWQ. Ammonia (NH3 as N) 0.02 mg/L Address distillation requirement. See ~~40CFR136~~ 40 CFR part 136 Table II footnote. ~~Nitrate + Nitrite~~ Nitrate+Nitrite as N 0.02 mg/L Total Kjeldahl Nitrogen as N 0.20 mg/L Total Phosphorus as P 0.02 mg/L ~~RLs current~~ Al* As* Cu* Cd* Cr* Fe* Pb* Hg* Ni* Zn* *No requirements for metals monitoring are included in this MOA, as the DWQ is currently in the process of ~~1/11/2016~~ reviewing metals water quality assessment techniques, evaluation criteria and relevant standards. However, the DWQ expects to conclude the review within the life cycle of this MOA. At such time, or when the DWQ Director mandates, the MCFBA is expected to resume monitoring at a level of effort similar to that in the 2008 – 2013 MOA. Within 60 days of the release of relevant documentation, the MCFBA will finalize an amendment to the MOA, which includes metals monitoring. Data Qualification Codes When reporting data, the ~~DWR~~DWQ’s data qualifier codes must be used to provide additional information regarding data quality and interpretation. The current set of qualifier codes to be used is provided in Table B-2. Review the data remark codes at least annually and utilize the most current set, as codes are subject to change. A copy of this table can be found at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/microbiology-inorganics-branch/methods-pqls-qa~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/ess/eco/coalition. Table B-2 Data ~~Remark~~ Qualification Codes for Use with Coalition Data Data Remark Code Code Definition A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field duplicates, different dilutions of the same sample). This code is not required for BOD, coliform or acute/chronic metals reporting since averaging multiple results for these parameters is fundamental to those methods or manner of reporting. A1. The reported value is an average, where at least one result is qualified with a “U”. The PQL is used for the qualified result(s) to calculate the average. B Results are based upon colony counts outside the acceptable range and should be used with caution. This code applies to microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was analyzed and the colony count is generated from a plate in which the number of coliform colonies exceeds the ideal ranges indicated by the method. These ideal ranges are defined in the method as: Fecal coliform bacteria: 20-60 colonies Total coliform bacteria: 20-80 colonies B1. Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters reported per 100 mL. B2. Counts from all filters were zero. The value reported is based on the number of colonies per 100 mL that would have been reported if there had been one colony on the filter representing the largest filtration volume (reported as a less than "<" value).Data

Appears in 1 contract

Samples: Memorandum of Agreement

Laboratory Analysis. All laboratory analyses shall be performed at a ~~DWR~~ DWQ certified laboratory using approved methods as prescribed by section 40 of the Code of Federal Regulations part 136 (40CFR136) or other methods certified by the ~~DWR~~ DWQ Laboratory Certification Branch (~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/laboratory-certification-branch~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/methods) or the Director of ~~DWR~~DWQ. 40CFR136 can be accessed on the web at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water- sciences-home-page/laboratory-certification-branch/rules-regulations~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/cert/nonfield/rules. Reporting levels will be at least as stringent as the reporting levels used by the ~~DWR~~ DWQ Laboratory. For guidance purposes Table B-1 lists target reporting levels for each parameter based on the reporting levels of the ~~DWR~~ DWQ Laboratory. The lowest possible analytical limits for all the parameters should be pursued. XXXXXXXX X XXXX XXX 0000 – 2017 Page 1 of 5 TABLE B-1 ~~DWR~~ DWQ Laboratory Reporting Limits Parameters Target Reporting Level Comments ~~Water~~ Temperature Resolution to 0.1 degree Celsius Dissolved Oxygen Report results to the nearest 0.1 mg/L. l. pH ~~Meters should be calibrated to measure a pH range of at least 4.01 to 9.18.~~ Report results to the nearest 0.1 ~~pH units~~SU. Specific Conductivity Report results to the nearest whole µmho/cm at 25 ºC. Turbidity 1.0 NTU TSS ~~6.2~~ 2.5 mg/L Fecal Coliform 1 colony/100 mL At least 3 dilutions should be used to achieve optimum colony counts per membrane filter of 20-60 colonies. Chlorophyll a 1 µg/L Report Chlorophyll a values free from pheophytin and other chlorophyll pigments. Analysis by HPLC is not approved by ~~DWR~~DWQ. Ammonia ~~(NH3 as N)~~ 0.02 mg/L Address distillation requirement. See 40CFR136 Table II footnote. ~~Nitrate + Nitrite~~ (NH3 as N) Nitrate+Nitrite as N 0.02 mg/L Total Kjeldahl Nitrogen as N 0.20 mg/L Total Phosphorus as P 0.02 mg/L ~~RLs current~~ Al* As* Cu* Cd* Cr* Fe* Pb* Hg* Ni* Zn* *No requirements for metals monitoring are included in this MOA, as the DWQ is currently in the process of ~~1/11/2016~~ reviewing metals water quality assessment techniques, evaluation criteria and relevant standards. However, the DWQ expects to conclude the review within the life cycle of this MOA. At such time, or when the DWQ Director mandates, the TPBA is expected to resume monitoring at a level of effort similar to that in the 2007 – 2012 MOA. Within 60 days of the release of relevant documentation, the TPBA will finalize an amendment to the MOA, which includes metals monitoring. XXXXXXXX X XXXX XXX 0000 – 2017 Page 2 of 5 Data Qualification Codes When reporting data, the ~~DWR~~DWQ’s data qualifier codes must be used to provide additional information regarding data quality and interpretation. The current set of qualifier codes to be used is provided in Table B-2. Review the data remark codes at least annually and utilize the most current set, as codes are subject to change. A copy of this table can be found at ~~xxxx://xxx.xx.xxx/about/divisions/water-resources/water-resources-data/water-sciences-home- page/microbiology-inorganics-branch/methods-pqls-qa~~xxxx://xxxxxx.xxxxxx.xxx/web/wq/lab/qualityassurance. Table B-2 Data ~~Remark~~ Qualification Codes for Use ~~with~~ With Coalition Data Data Remark Code Code Definition A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field duplicates, different dilutions of the same sample). This code is not required for ~~BOD,~~ BOD or coliform ~~or acute/chronic metals~~ reporting since averaging multiple ~~results~~ dilutions for these parameters is fundamental to those ~~methods or manner of reporting. A1. The reported value is an average, where at least one result is qualified with a “U”. The PQL is used for the qualified result(s) to calculate the average~~methods. B Results ~~are~~ based upon colony counts outside the acceptable range and should be used with caution. This code applies to microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was analyzed and the colony count is generated from a plate in which the number of ~~coliform~~ colonies exceeds the ideal ranges indicated by the method. These ideal ranges are defined in the method as: Fecal coliform or Enterococcus bacteria: 20-60 colonies Total coliform bacteria: 20-80 ~~colonies B1. Countable membranes with less than 20~~ colonies. Reported value is estimated or is a total of the counts on all filters reported per 100 mL. B2. Counts from all filters were zero. The value reported is based on the number of colonies per 100 mL that would have been reported if there had been one colony on the filter representing the largest filtration volume (reported as a less than "<" value).

Appears in 1 contract

Samples: Memorandum of Agreement

Common use of Laboratory Analysis Clause in Contracts