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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 TPH-DRO <br /> Concentration Level NA <br /> Sampling SOP SOP#004-2 <br /> Analytical Method EPA 8015M <br /> Sampler's Name/ Organization Toeroek Team <br /> Analytical Organization GEL Laboratories,Inc. <br /> No. of Sampling Locations See Site-Specific QAPP Worksheet#20 <br /> Person(s) Measurement <br /> QC Sample- Frequency/ Corrective Action(CA) Responsible DQI Performance <br /> Number- for CA Criteria <br /> If sufficient volume is available,re-prep and re- <br /> analyze samples in affected batch. If sufficient <br /> 1 per batch of 20 Laboratory Accuracy/Bias No target <br /> Method Blank samples maximum volume is not available,reanalyze affected Analyst Contamination compounds > QL <br /> extracts. Qualify all detections less than 10 <br /> times blank amount. <br /> If sufficient volume is available,re-prep and re- %R and RPD as <br /> Matrix Spike/Matrix 1 per batch of 20 analyze matrix spike sample. Otherwise,analyze Laboratory Accuracy and presented in Site- <br /> Spike Duplicate samples maximum laboratory control sample to see if problem is Analyst Precision Specific QAPP <br /> analysis or sample. Worksheet#12 <br /> Laboratory Control 1 per batch of 20 <br /> Re-analyze affected samples.If sufficient Laboratory %R as presented in <br /> Sample samples maximum volume is not available,qualify all sample Analyst Accuracy Site-Specific QAPP <br /> results for failing analytes. Worksheet#12 <br /> Re-analyze sample extract.If on re-analysis,the <br /> surrogate meets criteria,report re-analysis /oo <br /> results.If upon re-analysis,the monitoring Laboratory R as presented in <br /> Surrogate Spike All samples Accuracy Site-Specific QAPP <br /> compound does not meet criteria,re-prep and Analyst <br /> re-analyze the sample.If surrogate still does not Worksheet#12 <br /> meet criteria,report the results in the narrative. <br /> 65 <br />