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Mr. Gabriel Karar Project 939-01.09 <br /> April 9, 1992 <br /> Page 6 <br /> perimeter migration probes averaged approximately 25 percent of the <br /> concentration measured in the earlier samples, which were collected from <br /> shallow wells in refuse. <br /> Thank you for allowing us to assist you with the initial gas monitoring <br /> investigation at Harney Lane. Please call if you have any questions on the <br /> completed work, or require any additional assistance. <br /> ' <br /> Very Y trul yours, <br /> EMCON Associates <br /> Andrew P. Wang, P.E. <br /> Senior Project Engineer <br /> ///,,,�,� <br /> / t615ert E.,Van Heuit, P.E. <br /> Executive Manager <br /> APW/RVH:aw <br /> Attachments: Gas Monitoring Well Data <br /> California Calderon Test Result Summary <br /> Analytical Reports <br /> Well Volatile Organic Compound Data <br /> PJ9 9390109.EOW <br />