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Detailed Analytical Report Analytica Environmental Laboratories, Inc. <br />Workorder (SDG): B1110173 <br />Project: GW Monitoring <br />Client: Colorado Division of Reclamation, Mining & Safety <br />Client Project Number: None <br />DATA FLAGS AND DEFINITIONS <br />The PQL is the Method Quantitation Limit as defined by USACE. <br />Reporting Limit: Limit below which results are shown as "ND ". This may be the PQL, MDL, or a value between. See <br />the report conventions below. <br />Result Field: <br />ND = Not Detected at or above the Reporting Limit <br />NA = Analyte not applicable (see Case Narrative for discussion) <br />Qualifier Fields: <br />LOW = Recovery is below Lower Control Limit <br />HIGH = Recovery , RPD, or other parameter is above Upper Control Limit <br />E = Reported concentration is above the instrument calibration upper range <br />Organic Analysis Flags: <br />B = Analyte was detected in the laboratory method blank <br />J = Analyte was detected above MDL or Reporting Limit but below the Quant Limit (PQL) <br />Inorganic Analysis Flags: <br />J = Analyte was detected above the Reporting Limit but below the Quant Limit (PQL) <br />W = Post digestion spike did not meet criteria <br />S = Reported value determined by the Method of Standard Additions (MSA) <br />Several ways of defining the limit of detection and quantitation are prevalent in the laboratory industry and may appear in Analytica reports. These <br />include the following: <br />MRL = "minimum reporting level ", from the EPA Safe Drinking Water program (SDW) <br />PQL = "practical quantitation limit ", from SW -846 <br />EQL = "estimated quantitation limit ", from SW -846 <br />LOQ = "limit of quantitation ", from a number of authoritative sources <br />In Analytica's work, all of these terms have the same meaning, equivalent to the EPA definition of the MRL. This reporting level is supported by a <br />satisfactory calibration data point which is at that level or lower, and also is supported by a method detection limit (MDL) determined by the <br />procedure in 40CFR. The MDL is lower than the MRL and represents an estimate of the level where positive detections have a 99% probability of <br />being real, but where quantitation accuracy is unknown. <br />The MRL as defined by Analytica is the lowest demonstrated point of known quantitation accuracy. <br />The MRL should not be confused with the MCL, which is the EPA - defined "maximum contaminant level" allowed for certain regulated targets <br />under specific regulations, such as the National Primary Drinking Water Regulations. Normally, the MRL is set at a level which is much lower than <br />the MCL in order to ensure that levels are well below those limits. Not all target analytes have MCL levels established. <br />Other Flags may be applied. See Case Narrative for Description <br />Page 6 of 7 <br />