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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 Building Materials Caulk <br /> Analytical Group PCBs <br /> Concentration Level Scan <br /> Sampling SOP SOP#005-2 <br /> Analytical Method EPA 8082 <br /> Sampler's Name/ Organization TBD/Toeroek Team <br /> Analytical Organization GEL Laboratories,Inc. <br /> No. of Sampling Locations See Site-Specific QAPP <br /> Worksheet#20 <br /> Frequency/ Person(s) Measurement <br /> QC Samples Corrective Action (CA) Responsible DQI <br /> Numbers Performance Criteria <br /> for CA <br /> If sufficient volume is available,re-prep and <br /> 1 per extraction batch reanalyze samples in affected batch. If Laboratory Accuracy/Bias No target <br /> Method Blank of 20 samples sufficient volume is not available,reanalyze Analyst Contamination compounds > QL <br /> maximum affected extracts. Qualify all detections less <br /> than 10 times blank amount. <br /> 1 per extraction batch If sufficient volume is available,re-prep and %R and RPD as <br /> Matrix Spike/Matrix re-analyze matrix spike sample. Otherwise, Laboratory Accuracy and presented in Site- <br /> Spike Duplicate of 20 samples analyze laboratory control sample to see if Analyst Precision Specific QAPP <br /> maximum problem is analysis or sample. Worksheet#12 <br /> 1 per extraction batch Re-analyze affected samples.If sufficient Anal %R as presented in <br /> Laboratory Control of 20 samples volume is not available qualify all sample Laboratory Accuracy Site-Specific QAPP <br /> Sample maximum results for failinganal tes. yst Worksheet#12 <br /> Reanalyze sample.If on reanalysis,the <br /> surrogate meets criteria,report reanalysis <br /> results. If upon reanalysis,the monitoring %R as presented in <br /> Surrogate Spike All samples compound does not meet criteria,re-prep Laboratory Accuracy Site-Specific QAPP <br /> and re-analyze the sample.If surrogate still Analyst Worksheet#12 <br /> does not meet criteria,report the results in <br /> the narrative. <br /> 62 <br />