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• TABLE 3 <br /> SUMMARY OF LABORATORY QUALITY CONTROL LINIITS <br /> Quality Control Check Laboratory Control Limits <br /> All-Instrument-Methods <br /> Duplicates Aqueous: <20 percent RPD <br /> Solids: <35 percent RPD <br /> Matrix Spikes 75 to 125 percent recovery <br /> Inductively Coupled Plasma(ICP)and Inductively <br /> Coupled a Mass Spectrpmg= <br /> Laboratory Control Solution Recovery 80 to 100 percent recovery <br /> Preparatory Blanks Less than Contract Required Detection Limits <br /> Matrix Spike 75 to 125 percent recovery <br /> Matrix Spike Duplicate or Sample Duplicate Less than 20 percent RPD for data greater than <br /> 5 times maximum detection limit <br /> Other Quality Control Procedures <br /> (Not Routinely Provided) <br /> Calibration Verification Samples (ICV, CCV) 90 to 110 percent recovery <br /> Calibration Blanks (ICB, CCB) Less than minimum detection limit <br /> Interelement check samples (ICS-A, ICS-AB) 80 to 120 percent recovery <br /> Serial Dilution Samples Within 10 percent of original sample analysis <br /> (data must be greater than 50 times detection <br /> limit) <br /> Notes: <br /> RPD=relative percent difference <br /> Standard laboratory QA/QC procedures for each method will be followed and reported. Compliance <br /> • and/or violation of these laboratory control limits will be summarized in a Case Narrative report <br /> provided by the analytical laboratory. <br /> PRIVILEGED AND CONFIDENTIAL <br /> c:lprojects161021sap•30.x1s �- <br /> - _ _ =Environmental <br />