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Groundwater VOC and Fuel General Permit ORDER NO.R2-2012-0012 <br /> NPDES NO.CAG912002 <br /> ATTACHMENT A—ACRONYMS AND DEFINITIONS <br /> Acron ms <br /> CIW S California lnte rated Water uali S stem <br /> AMEL Avera e Monthl Effluent Limitation <br /> Basin Plan Water uali Control Plan for the San Francisco Ba Basin <br /> BPJ Best Professional Jud ment <br /> CFR Code of Federal Re ulations <br /> CTR California Toxics Rule <br /> CV Coefficient of Variation <br /> CWA Federal Clean Water Act <br /> DN Detected,but Not uantified <br /> DO Dissolved ox en <br /> ECA Effluent Concentration Allowance <br /> EFF Effluent <br /> MDEL Maximum Dail Effluent Limitation <br /> MDL Method Detection Limit <br /> ML Minimum Level <br /> MTBE Meth 1 Tertia Bu 1 Ether <br /> ND Not Detected <br /> NTR National Toxics Rule <br /> NOI Notice of Intent <br /> NPDES National Pollutant Dischar e Elimination S stem <br /> PCE Tetrachloroeth lene <br /> POTW Publicl Owned Treatment Work <br /> RL Re ortin Level <br /> RPA Reasonable Potential Anal sis <br /> SIP State Im lementation Polic <br /> SSTs Site-S ecific Translators <br /> TCE Trichloroeth lene <br /> TPHG Total Petroleum H drocarbons as Gasoline <br /> TPHD Total Petroleum H drocarbons as Diesel <br /> /L Micro ram er Liter <br /> USEPA U.S. Environmental Protection A enc <br /> VOC Volatile Or anic Com ounds <br /> Definitions <br /> Arithmetic Mean (µ),also called the average, is the sum of ineasured values divided by the number of <br /> samples. For ambient water concentrations,the arithmetic mean is calculated as follows: <br /> Arithmetic mean= µ=Ex/n where: Ex is the sum of the measured ambient water <br /> concentrations, and n is the number of samples. <br /> Attachment A—Acronyms and Definitions A-1 <br />