Laserfiche WebLink
Environmental <br />' Resources <br /> Management <br /> D1777 Botelho Drive <br /> Suite 260 <br /> NOV 13 2001 <br /> ` Walnut Creek,CA 94596 <br />' ENVIRO111.�'IENT HEALTH (925)946-0455 <br /> PERM IT/SERVIC.ES (925)946-9968(fax) <br /> ' 9 November 2001 <br /> i t� + <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services <br /> yi <br /> Environmental Health Division ERM. <br /> ' 304 East Weber Street <br /> Stockton, CA 95202 <br /> ' Subject September 2001 Ground Water Analytical Results <br /> Former UPRR Property <br /> 936 East Weber Avenue <br /> Stockton, California <br /> ' Dear Mr Knoll <br /> On behalf of Union Pacific Railroad Company (UPRR), Environmental <br /> Resources Management is submitting the ground water analytical report <br /> from the 28 September 2001 quarterly sampling event at the subject site This <br /> information is being submitted as requested by the San Joaquin County <br /> ' Public Health Services <br /> ' Detections of total petroleum hydrocarbons as gasoline (TPH-g) were <br /> observed above the detection limit of 50 parts per billion in the sample <br /> collected from MW-2 (135 ppb) and the duplicate sample collected from MW- <br /> ' 3 (97 2 ppb) However, the TPH-g concentration observed in the duplicate <br /> sample was not found in the other sample collected from MW-3 The result <br /> obtained from the duplicate sample of MW-3 is not considered valid and may <br /> rbe the result of a sample handling error A resample for TPH-g in MW-3 was <br /> conducted on 11/2/01 TPH-g was not detected in the resample above the <br /> method detection limit <br /> Based on the following,we believe that this low risk site is a candidate for <br /> ' closure <br /> a Removal of source of contamination in 1979 during UST removal, <br /> Nearest downgradient water well is over 1/2-mile from the site based on <br /> the EDR-GeoCheck®Report for the site, which has been attached, <br />