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TABLE 1C <br />ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA - METALS <br />Former Mobil Service Station 99CAS <br />75 E. Alpine Avenue <br />Stockton, California <br />(Page 3 of 3) <br />Notes (Cont.): <br />BTEX <br />= Benzene, toluene, ethylbenzene, and total xylenes analyzed using EPA Method 826013; analyzed using EPA Method 8021 B during first quarter 2009. <br />ETBE <br />= Ethyl tertiary butyl ether analyzed using EPA Method 826013. <br />TAME <br />= Tertiary amyl methyl ether analyzed using EPA Method 82608. <br />TBA <br />= Tertiary butyl alcohol analyzed using EPA Method 826013. <br />EDB <br />= 1,2-dibromoetcane analyzed using EPA Method 8260B. <br />1,2 -DCA <br />= 1,2-diccloroetcane analyzed using EPA Method 8260B. <br />DIPE <br />= Di -isopropyl ether analyzed using EPA Method 82608. <br />PCBs <br />= Polychlorinated biphenyls analysis as Aroclors by EPA Method 8082 includes PCB types 1016, 1221, 1232, 1242, 1248, 1254, and 1260. <br />SVOCs <br />= Semi -volatile organic compounds. <br />Arsenic <br />= Arsenic analyzed using EPA Method 601013; prior to May 2011, analyzed using EPA Method 6020. <br />Cadmium <br />= Cadmium analyzed using EPA Method 60108; prior to May 2011, analyzed using EPA Method 6020. <br />Lead <br />= Lead analyzed using EPA Method 60108; prior to May 2011, analyzed using EPA Method 6020. <br />Selenium <br />= Selenium analyzed using EPA Method 601013; prior to May 2011, analyzed using EPA Method 6020. <br />Thallium <br />= Thallium analyzed using EPA Method 60106; prior to May 2011, analyzed using EPA Method 6020. <br />Antimony <br />= Antimony analyzed using EPA Method 601013; prior to May 2011, analyzed using EPA Method 6020. <br />pg/L <br />= Micrograms per liter. <br />ND <br />= Not detected at or above tee laboratory reporting limit. See laboratory analytical report for complete list of analytes and method reporting limits. <br />= Not measured/Not sampled/Not analyzed. <br />< <br />= Less than the stated laboratory reporting limit. <br />a <br />= Unable to locate well. <br />b <br />= Sample received after recommended holding time. <br />c <br />= Compound did not meet method -described identification guidelines. Identification was based on additional GC/MS characteristics. <br />d <br />= The sample chromatographic pattern for TPH does not match the chromatographic pattern of the specified standard. Quantitation of the unknown hydrocarbon(s) <br />in the sample was based upon the specified standard. <br />e <br />= Secondary ion abundances were outside method requirements. Identification based on analytical judgment. <br />f <br />= Analyte was present in the associated method blank. <br />g <br />= Hydrocarbon result partly due to individual peak(s) in quantitation range. <br />h <br />= Sample filtered in lab. <br />i <br />= Analyte presence was not confirmed by second column or GC/MS analysis. <br />j <br />= Analyte was detected at a concentration at or below the reporting limit and above the laboratory method detection limit. Reported value is estimated. <br />k <br />= Samples analyzed by EPA Method 8021 B (M). <br />I <br />= Laboratory Control Sample and/or Laboratory Control Sample Duplicate was above the acceptance limits. Analyte not detected, data not impacted. <br />m <br />= The sample extract was subjected to silica gel treatment prior to analysis. <br />