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Groundwater VOC and Fuel General Permit ORDER NO.R2-2012-0012 <br /> NPDES NO.CAG912002 <br /> Quality Assurance Officer is a qualified individual who was not otherwise involved in sample <br /> collection, transport, or analysis (please refer to the following web site for a more detailed description: <br /> http://www.waterboards.ca.gov/swamp/docs/swampgapp template032404.doc) to investigate the cause <br /> of data error. <br /> Persistent Pollutants are substances for which degradation or decomposition in the environment is <br /> nonexistent or very slow. <br /> Reporting Level (RL) is the ML(and its associated analytical method) chosen by the Discharger for <br /> reporting and compliance determination from the MLs included in this Order. The MLs included in this <br /> Order correspond to approved analytical methods for reporting a sample result that are selected by the <br /> Regional Water Board either from Appendix 4 of the SIP in accordance with section 2.4.2 of the SIP or <br /> established in accordance with section 2.4.3 of the SIP. The ML is based on the proper application of <br /> method-based analytical procedures for sample preparation and the absence of any matrix interferences. <br /> Other factors may be applied to the ML depending on the specific sample preparation steps employed. <br /> For example, the treatment typically applied in cases where there are matrix-effects is to dilute the <br /> sample or sample aliquot by a factor of ten. In such cases, this additional factor must be applied to the <br /> ML in the computation of the RL. <br /> Source of Drinking Water is any water designated as municipal or domestic supply(MUN) in a <br /> Regional Water Board Basin Plan. <br /> Standard Deviation (a) is a measure of variability that is calculated as follows: <br /> 6 = (�[(x - µ)2]/(n— 1))o.s <br /> where: <br /> x is the observed value; <br /> µ is the arithmetic mean of the observed values; and <br /> n is the number of samples. <br /> Toxicity Reduction Evaluation (TRE) is a study conducted in a step-wise process designed to identify <br /> the causative agents of effluent or ambient toxicity, isolate the sources of toxicity, evaluate the <br /> effectiveness of toxicity control options, and then confirm the reduction in toxicity. The first steps of the <br /> TRE consist of the collection of data relevant to the toxicity, including additional toxicity testing, and an <br /> evaluation of facility operations and maintenance practices, and best management practices. A Toxicity <br /> Identification Evaluation(TIE)may be required as part of the TRE, if appropriate. (A TIE is a set of <br /> procedures to identify the specific chemical(s)responsible for toxicity. These procedures are performed <br /> in three phases (characterization, identification, and confirmation)using aquatic arganism toxicity tests.) <br /> Attachment A—Acronyms and Definitions A-4 <br />