Chronic Toxicity Sample Clauses

Chronic Toxicity. The discharge is subject to determination of “Pass” or “Fail” from a chronic toxicity test using the Test of Significant Toxicity (TST) statistical t-test approach described in National Pollutant Discharge Elimination System Test of Significant Toxicity Implementation Document (EPA 833-R-10-003, 2010), Appendix A, Figure A-1 and Table A-1, and Appendix B, Table B-1. The null hypothesis (Ho) for the TST statistical approach is: Mean discharge “in-stream” waste concentration (IWC) response ≤0.75 × Mean control response. A test result that rejects this null hypothesis is reported as “Pass”. A test result that does not reject this null hypothesis is reported as “Fail”. This is a t-test (formally Student’s t- test), a statistical analysis comparing two sets of replicate observations—in the case of WET test, only two test concentrations (i.e., a control and IWC). The purpose of this statistical test is to determine if the means of the two sets of observations are different (i.e., if the IWC or receiving water concentration differs from the control (the test result is “Pass” or “Fail”)). The Xxxxx’x t-test employed by the TST statistical approach is an adaptation of Student’s t-test and is used with two samples having unequal variances. The MDEL for chronic toxicity is exceeded and a violation will be flagged when a chronic toxicity test, analyzed using the TST statistical approach, results in “Fail”. The MDEL for chronic toxicity is set at the IWC for the discharge (1.06% effluent = 1 IWC = 1/minimum initial dilution factor (Dm) = 1/94.6 = 0.0106) and expressed in units of the TST statistical approach (“Pass” or “Fail”). All monitoring for the MDEL for chronic toxicity shall be reported using the IWC effluent concentration and negative control, expressed in units of the TST. The TST hypothesis (see above) is statistically analyzed using the IWC and a negative control. Effluent toxicity tests shall be run using Short-Term Methods for Estimating the Chronic Toxicity of Effluent and Receiving Waters to West Coast Marine Estuarine Organisms (EPA/600/R-95/136, 1995). The San Diego Water Board’s review of reported toxicity test results will include review of concentration-response patterns as appropriate (see section 4.3.5 of the Fact Sheet (Attachment F)). As described in the laboratory audit directives to the San Xxxx Creek Water Quality Laboratory from the State Water Board dated August 07, 2014, and from USEPA dated December 24, 2013, the Percent Minimum Significa...
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Related to Chronic Toxicity

  • Infectious Disease Where an employee produces documentary evidence that:

  • Infectious Diseases The Employer and the Union desire to arrest the spread of infectious diseases in the nursing home. To achieve this objective, the Joint Health and Safety Committee may review and offer input into infection control programs and protocols including surveillance, outbreak control, isolation, precautions, worker education and training, and personal protective equipment. The Employer will provide training and ongoing education in communicable disease recognition, use of personal protective equipment, decontamination of equipment, and disposal of hazardous waste.

  • Dangerous Goods, Special Wastes, Pesticides and Harmful Substances Where employees are required to work with or are exposed to any dangerous good, special waste, pesticide or harmful substance, the Employer shall ensure that the employees are adequately trained in the identification, safe handling, use, storage, and/or disposal of same.

  • Non-Grievability No dispute over a claim for any benefits extended by this Health and Welfare Fund shall be subject to the grievance procedure.

  • Serious Health Condition An illness, injury, impairment, or physical or mental condition which warrants the participation of a family member to provide care during a period of treatment or supervision and involves either inpatient care in a hospital, hospice or residential health care facility or continuing treatment or continuing supervision by a health care provider (e.g. physician or surgeon) as defined by state and federal law.

  • ENDANGERED SPECIES The Endangered Species Act of 1973 (16 U.S.C. § 1531, et seq.) as amended, particularly section 7 (16 U.S.C. § 1536).

  • Diagnosis For a condition to be considered a covered illness or disorder, copies of laboratory tests results, X-rays, or any other report or result of clinical examinations on which the diagnosis was based, are required as part of the positive diagnosis by a physician.

  • Serious Illness Should a participant be unable to take the leave when scheduled because of serious injury or illness occurring before commencement of the leave, he/she may cancel the leave and receive payment as in Article 12.8.3.9 or, with the consent of the College, defer the leave to a time mutually agreeable, not to exceed one (1) year.

  • Grievability Denial of a petition for reinstatement is grievable. The grievance may not be based on information other than that shared with the Employer at the time of the petition for reinstatement.

  • Virus detection You will be responsible for the installation and proper use of any virus detection/scanning program we require from time to time.

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