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N � <br /> �a Page 2 of 2 <br /> N <br /> We are nearly finished with the investigation report that is due to your office for the results of the data that <br /> were collected on April 9th during the limited soil and groundwater investigation . This report should be out <br /> within a week and will include updated cross sections and calculations of the total volume of contaminants, <br /> which are based on the data collected . <br /> i <br /> As you know, this revision of the site conceptual model graphics will be needed so that we can identify any <br /> data gaps prior to developing accurate injection locations on the property and quantities of the injection <br /> chemicals to use for degrading the hydrocarbon contaminants in the soil and water. <br /> So far, it is clear that there are a lot of data gaps and that more soil and groundwater data will be needed <br /> before we can fully design the injection point locations and injection liquid volume - a recommendation will <br /> be provided for the collection of this data in the Limited Soil and Groundwater Investigation Report, which <br /> you will soon receive. <br /> We are also currently editing the bench scale test workplan , which we will provide for you to review and <br /> should be starting the tests as soon as we receive your approval . The lab test timeframe is that we <br /> get results back 2-3 weeks after the start of the tests. Once we get the bench-scale test results back, we <br /> will submit a Bench-Scale Test Results report , <br /> Following the receipt of your approval of additional delineation borings from which we will produce <br /> the Workplan for the Chemical Injection Remediation , we can get started with the underground injection <br /> well permitting process with the State Water Board . <br /> Next week our Engineer, Erik Lervaag , will be at the property to perform the maintenance on the existing <br /> groundwater remediation system. This maintenance will include re-installing the oxygen line to IW-8 from <br /> the oxygen tank cage. As it is currently planned, he will be there on Thursday and Friday, May 13th and <br /> May 14th . <br /> Thank You , <br /> Arron Wilder, CPSS #322410 <br /> Project ManagerlProject Geoscientist <br /> Clearwater Group <br /> 229 Tewksbury Ave. <br /> Point Richmond, CA 94801 <br /> 510-307-9943 ext. 236- office <br /> 510-590- 1096 - cell <br /> 5/12/2010 <br />