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SAP/QAPP Addendum <br /> Lodi-125 N Stockton <br /> Final <br /> March 24,2025 <br /> SITE-SPECIFIC QAPP WORKSHEET #28 (CONTINUED) <br /> ANALYTICAL QC AND CORRECTIVE ACTION <br /> Matrix Soil <br /> Analytical Group Metals <br /> Concentration Level ICP-MS <br /> Sampling SOP SOP#004-2 (Soil)) <br /> Analytical Method EPA 6020 <br /> Sampler's Name/ TBD/Toeroek Team <br /> Organization <br /> Analytical <br /> GEL Laboratories,Inc. <br /> Organization <br /> No. of Sampling See Worksheet#20 <br /> Locations <br /> Person(s) Measurement <br /> QC Sample- Frequency/ Corrective Action (CA) Responsible DQI Performance <br /> Numbers for CA Criteria <br /> If sufficient volume is available,extract and <br /> 1 per batch of 20 samples <br /> re-analyze samples in affected batch.If Laboratory Accuracy/Bias No target <br /> Method Blank maximum ffi Analyst Contamination <br /> sufficient volume is not available re-analyze compounds > <br /> affected extracts. Qualify all detections less QL <br /> than 10 times blank amount. <br /> Perform corrective action as needed.If <br /> problems continue,re-calibrate instrument. %R as <br /> Laboratory Control 1 per batch of 20 samples Re-analyze affected samples.If sufficient Laboratory Accuracypresented in <br /> Sample maximum volume is not available,qualify all sample Analyst Worksheet <br /> results for failing analytes and discuss in #12 <br /> narrative. <br /> If sufficient volume is available,re-prep and %R and RPD <br /> Matrix Spike/Matrix 1 per batch of 20 samples re-analyze matrix spike sample. Otherwise, Laboratory Accuracy and as presented in <br /> Spike Duplicate maximum analyze laboratory control sample to see if Analyst Precision Worksheet <br /> problem is analysis or sample. #12 <br /> 67 <br />