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1 <br /> EIIC�t® <br /> 1 " <br /> . Mr James L Barton <br /> 1 July 28, 2005 <br /> Page 3 <br /> 1 • 1 sopropyl benzene (cumene) <br /> • Methyl-tertiary butyl ether(MTBE) <br /> • n-Butylbenzene <br /> • Toluene <br /> • 1,3,5-Tnmethylbenzene <br /> 1 • Xylenes <br /> 1 For the remaining wells, it Is recommended that the specific constituents showing <br /> concentrations above the screening levels be monitored until the concentration has been below <br /> the screening level for four consecutive monitoring events, as follows <br /> 1 • MW-1 TPHg, Benzene <br /> • MW-2 TPHg, Benzene, Naphthalene, 1,2,4-Tnmethylbenzene <br /> 1 • MW-3 TPHg, Benzene, Naphthalene <br /> • MW-4 TPHg, Benzene <br /> 1• • MW-6 TPHg, Benzene <br /> o MW-81D TPHg, Benzene <br /> o MW-9R TPHg <br /> 1 o MW-11 TPHg, Benzene, Naphthalene (Naphthalene exceeded the screening level in <br /> July 2004 and was below for the following three monitoring events) <br /> 1 + MW-12 TPHg (exceeded screening level to July 2004, but not detected to the following <br /> three monitoring events) <br /> MW-14 TPHg (exceeded screening level In July 2004, but not detected in the following <br /> three monitoring events) <br /> • MW-16 TPHg, Benzene <br /> • MW-18D TPHg (exceeded screening level in July 2004, but not detected to the following <br /> three monitoring events) <br /> • MW-24S TPHg (exceeded screening level in July 2004, but not detected in the following <br /> three monitoring events) <br /> • MW-24D TPHg, Benzene <br /> • MW-25D TPHg <br /> ENSR understands that changes to CAO No 5-00-707 need to be approved 9 pp d by the Executive <br /> Officer of the RWQCB ENSR will continue with the current sampling protocol pursuant to CAO <br /> No 5-00-707 pending any changes deemed acceptable by the RWQCB <br /> • J IPmjects}0694OZO98-2931WorlunglReportslLetter Requesting Reduction in SamplrngW%Letter Requesting Reduction in Samplmg doc <br /> ® Celebrating 35 Years of Excellence in Environmental Services <br />