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Appendix E.1:Data Usability Summary <br /> • Boron, calcium, iron, magnesium, manganese, potassium, and sodium by EPA Method <br /> 6010B. <br /> • Chloride, sulfate, nitrate, and nitrite by EPA Method 300.0. <br /> • Kjeldahl nitrogen by EPA Method 351.2. <br /> • Specific conductance by SM20 2510 B. <br /> • Total hardness as CaCO3 by SM 18 2340B. <br /> • Total dissolved solids by SM20 2540 C. <br /> • Total phosphorus as PO4 by EPA Method 365.1. <br /> The data was evaluated in general conformance to the requirements of project objectives <br /> specified in the following documents: <br /> • Quality Assurance and Quality Control: Sample Collection, Handling, and Analysis <br /> Guidelines; ChevronTexaco Historical Pipeline Portfolio Sites, California, April 2007. <br /> • SAIC Technical Procedure TP-DM-300-7,Data Validation. <br /> • SAIC Technical Procedure TP-DM-300-14,Evaluation of Field and Analytical Data. <br /> INTENDED USES OF THE DATA <br /> Laboratory data are being used for site evaluation and decision making for petroleum releases <br /> attributed to Chevron's historical crude oil and Bunker C fuel oil pipelines. The data generated <br /> will be compared to Regional Water Quality Control Board water quality objectives and may be <br /> used for risk assessment purposes. <br /> Data QC Objectives <br /> The SAIC evaluated project analytical data according to the following parameters in order to <br /> determine their usability: <br /> • Precision <br /> • Accuracy <br /> • Representativeness <br /> • Completeness <br /> • Comparability <br /> DATA USABILITY SUMMARY <br /> The following sections summarize the findings of the data evaluation process. The following <br /> data validation qualifiers were used in the data evaluation: <br /> ualifier Description <br /> E Indicates the reported value is estimated due to associated QC <br /> results. <br /> J Indicates the reported value is an estimated concentration detected <br /> between the method detection limit(MDL) and limit of <br /> quantitation(LOQ). <br /> E.1-2 —– =— <br /> Frain Scrertce ra Sa7ufrens <br />