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6RE: World Enterprises Passive S '1 Vent Plan Page 2 of 3 <br /> The methane concentration of the above identified probes was 0.9%in VW-4, <br /> 3.5%in VW-5S,4.2% in VW-5D, 1.5% in VW-6S,and 4.0%in VW-6D. <br /> Following the passive soil vapor extraction trench installation activities, <br /> you requested that the landfill gas concentration be measrued within the <br /> probes,extraction well,and passive vent locations on a bi-weekly(every <br /> two weeks)basis during the first quarter following the installation of the <br /> passive soil vapor extraction trench. We plan on measuring the landfill <br /> gas concentrations at all of the probe,extraction well,and passive vent <br /> locations later this week on Thursday October 19,2006. If the methane <br /> concentration within all of the probes are less than 5 percent during this <br /> event,we respectfully request for your approval to suspend the bi-weekly <br /> monitoring and to reinstate the quarterly monitoring. If you have any <br /> questions,please let me know. <br /> Take care, <br /> Jay <br /> This e-mail and any attachments are confidential.If you receive this <br /> message in error or are not the intended recipient,you should not retain, <br /> distribute,disclose or use any of this information and you should destroy <br /> the e-mail and any attachments or copies. <br /> "Robert McClellon <br /> [EH]" <br /> <RMcClellon@sjceh To <br /> d.com> <Jay_Kamine@URSCorp.com> <br /> cc <br /> 10/04/2006 01:49 <br /> PM Subject <br /> RE: World Enterprises Passive Soil <br /> Vent Plan <br /> Jay the site activities that would be completed during this period of <br /> surveillance and monitoring would be to sample all Vapor wells and passive <br /> 7/5/2007 <br />