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GealaguaI Techfiks Inc. Groundwater Momtonng Report Project No 724 2 February 13, 2006 Page 5 The detection limits for the above analyses are listed in Table 5 of Appendix A, while the lab analytical results are presented in Appendix B As required under AB2886, the laboratory data and groundwater elevation were submitted electronically to GeoTracker on February 13, 2006 (confirmation #'s 2259269237 and 3913639664, respectively) 2.0 FINDINGS AND DISCUSSION The results of the groundwater sample analyses indicate the following 1 Non -detect Wells • Wells — MW -1, MW -4, MW -5, MW -6, MW -11, MW -104, MW -110, MW -111 and MW -202 did not contain petroleum hydrocarbon contaminants above the laboratory reporting lxmrts 2 TPH-G • TPH-G was not detected in any of the shallow wells • Intermediate wells MW -2, MW -3, MW -106, MW -107 and MW -108 contained 94, 69, 170, 86 and 110 µg/1 of TPH-G, respectively o Deep wells MW -208 and MW -210 contained 560 and 53 µgll of TPH-G, respectively 3 MTBE o Shallow well MW -7 contained 2 2 µg/1 MTBE o Intermediate wells MW -106, MW -107 and MW -109 contained 25,3 5 and 3 µg/1 MTBE, respectively • Deep well MW -209 contained 8 4 µ.g/1 of MTBE 4 Benzene • Benzene was not detected in any of the shallow wells • Intermediate wells MW -3, MW -106 and MW -108 contained 0 53, 1.2 and 15 µ.g/1 Benzene, respectively • Deep well MW -208 contained 6 2 µg/1 of Benzene The distribution of groundwater contanunants is summarized as follows (Nate The Isoconcentration contours are generated utilizing the SURFER® computer modeling program We recognize that computer generated contour maps do not provide the most accurate representation of what is taking place to the field However, even hand - contoured maps at hest provide a shadow of reality Both need to be looked at as interpretation, not reality )