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i <br /> I <br /> i 1 <br /> Mr Ron Rowe <br /> Page 5 of 5 <br /> ' limits of contamination We also recommend fate and transport modeling and a risk based <br /> p g <br /> corrective action evaluation Based on these evaluations, site specific criteria should be <br /> ' developed to determine at what point investigation and reniediatlon should cease and the case be <br /> closed Pending completion of those tasks we recommend the following <br /> ' VES Operation <br /> We recommend discontinuing vapor extraction System operation was suspended on January 3, <br /> 2000 <br /> tQuarterly Groundwater Monitor ing and Sampling <br /> We will perform groundwater monitoring and sampling for the second quarter in May 2000 <br /> Your office will be notified at least 48 hours prior to commencing field work Please call if you <br /> have any questions or comments regal ding this quat ter ly nnoautoi ing and sampling report <br /> ' Respectfully, <br /> Gr n ero Analyst Inc <br /> I) Gf 01 <br /> �dlZ• Justin M Power, GREGORY P. <br /> Pr ect eologist STAHL <br /> ' r No 5023 <br /> Gregory P Stahl, RG 5023 �lglf OF CA0- <br /> ' CA Certified Hydrogeologist 264 <br /> ' Attachments <br /> PC Mr Carl Knowles <br /> ' Mr Pat Riddle, Esq , Law Offices of Pati ick D Riddle <br /> Mr Mark List, CRWQCB Saci amento <br /> Mr Daniel J Schroeder, Esq , Neumllle[ & Beaj dslee <br /> 1 <br /> 1 <br /> mWilmrl1gm2000 <br /> 1 <br />