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lie of the Tri-Regional Board Guidelines directs that after the limits <br /> of contamination have been delineated, the next step in the <br /> investigation is the preparation of a Problem Assessment Report. <br /> j, This report should summarize the previous investigations and <br /> II include the data necessary for evaluation of remediation <br /> alternatives. Prior to preparation of the PAR, a pump test should <br /> be performed to establish flow rates for groundwater pumping. The <br /> best candidate well is MW-1, which has a 4-inch diameter and is <br /> located near the center of the contaminant plume. <br />' GeoAudit also recommends the installation of a vadose zone well <br /> near MW-1 to assess the viability of vapor extraction and in-situ <br /> bioremediation as alternative soil remediation techniques. <br /> 6. 0 LIMITATIONS <br /> i' Our professional services were performed using that degree of care <br /> and skill ordinarily exercised by environmental consultants <br /> practicing in this or similar localities. The findings were mainly <br />' based on analytical results provided by an independent laboratory. <br /> No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report. <br /> The opportunity to prepare this report is greatly appreciated. If <br /> you have any questions or comments, please contact our office. <br />' Sincerely, <br /> GEOLOGICAL AUDIT SERVICES, INC. <br /> Kevin McKibben <br /> Staff Geologist <br /> Bob Marty <br /> Project Geologist\J <br /> a.C <br />:i■ V;..i�..r D rhnrisan NO.3475 <br /> �. Registered Geologist , 3475 <br /> ' toR CWF�� <br /> 5 <br />