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F <br /> vw S CE9icnEoS OnSlt w 7 <br /> 1 <br /> ROY F. WESTON, INC. <br />' STOCKTON LABORATORY <br /> METALS CASE NARRATIVE <br /> 1 Client: San Joaquin County W.O.#: 03733-006-001-0001 <br /> RFW#: 9306SO33 Date Reed: 06/04/93 <br /> 1 <br /> 1 This narrative covers the analysis of five water samples for Lead. <br />' 2 The samples were prepared and analyzed in accordance with EPA method 239.2 <br />' 3 All analyses were performed within the required holding tunes. <br /> 4 All Initial and Continuing Calibration Verifications (ICV/CCV's)were within control <br /> limits <br /> 5 All Initial and Continuing Calibration Blanks(ICB/GCB's)were within control limits <br />' 6 All Preparation/Method Blanks were below Reporting Limits <br /> 7 All Laboratory Control Samples (LCS) were within the 80-120% control limits <br /> (exceptions allowed for Ag and Sb). <br />' 8 Ail-Matnx Spike recoveries were within the 75-125% control limits (exception <br /> allowed when sample concentration exceeds the spike added concentration by a <br /> factor of 4 or more) <br />