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• 0 g = Gasoline does not include MTBE h = Casing elevation altered due to wellhead maintenance i = A copy of the documentation for this data can be found in Blaine Tech Services report 010501 S 2 MTBE data for the March 2 1993 sampling event has been destroyed No chromatograms could be located for MTBE data from wells MW 1 MW 2 MW 3 MW-4 MW 7 MW 8 MW 9 MW 10 sampled on June 23 1993 well MW 5 sampled on April 8 19943 and well MW-4 sampled on October 10 1994 1 = Unable to locate well k = For the first quarter 2003 TPH-g BTEX and MTBE were analyzed using EPA Method 82606 I = This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purposes m = The concentration Indicated for this analyte is an estimated value above the calibration range of the instrument n = The result was reported with a possible low bias due to the conhnwng calibration verification falling outside the acceptance criteria 0 = Primary and confirmation results varied by greater than 40%RPD The results may still be useful for their intended purpose p = Qualifier not used q = Qualifier not used r = The sample was diluted due to the presence of high levels of non target analytes resulting in etevated reporting limits s = Sheen in well t = TPH-g BTEX and MTBE were mistakenly analyzed by EPA Method 82608 The lab has been informed of their error and future samples w4l be analyzed by Methods 8015M and 8021B u = Primary and confirmation results varied by greater than 40%RPD The results may still be useful for their intended purposes v = Wells were gauged after well development of new monitoring well MW 14 w = to the Fourth Quarter 2003 the laboratory modified the report analyte Ilst TPH-g was changed to GRO The resulting data may be impacted by the potential inclusion of non TPH g analytes within the requested fuel range resulting in a higher concentration being reported x - Beginning second quarter 2004 the carbon range fro GRO was changed from C6 C10 to C4 C12 y = Wells were resurveyed on 3/5104 and 3126104 including nearby ARCO 2121 z = MW 5 was not surveyed In March 2004 The well is in the process of being resurveyed as = Reporting limits were raised due to a high level of non target analytes present in sample bb = Sheen in well cc = Possible low bias due to CCV falling outside acceptance criteria NOTES Source The data within this table collected pnor to 2006 was provided 10 SECOR by BP and their previous consultants SECOR has not verified the accuracy of this informabon I Beginning in the fourth quarter 2003 the laboratory modified the analyte list TPH-g was changed to GRO The resulting data may be impacted by the potential of non TPH-g analytes within the requested fuel range resulting in a higher concentration being reported I Beginning in the second quarter 2004 the carbon chain range for GRO was changed from C6 C10 to C4 C12 Values for pH and DO were obtained through field measurements Casing elevations surveyed to the nearest 0 01 ft MSL Groundwater elevations adjusted assummg a speafic gravity of 0 75 for free product I 1BP-ARC0105 BP-COP Sites1111911Tables106-Q1111191_Table 1 2 SECOR International Inc