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i sU.�Bdx 2000 <br /> �47 1400 <br /> 51'_ake Tahoe, CA 95705 Tel. (916) 541-2639 <br /> lY10 <br /> DENNIS R. ALLEN M. MC <br /> PETROLEUM & ENGINEERING GEOLOGY <br /> ENVIRONMENTAL MCI <br /> January 1 , 1990 ENVIRONMENTAL HEA'THE <br /> Ms . Darlene Reuss <br /> PER MiTlSE4VICES <br /> Department of Health Services <br /> San Joaquin County <br /> P.Q. Box 2009 <br /> Stockton , CA 95201 <br /> Re : No . 1 West Turner Road , Lodi , CA <br /> Cleaning of monitoring wells <br /> Dear Ms . Reuss : <br /> As we discussed by telephone on 1 /5/90 , I am submitting the <br /> following data for discussion at your meeting with the SJVRWQCB <br /> on Tuesday , 1 /9/90 . <br /> Jim Thorpe Oil Co . has retained Hunter and Associates , 2701 Cottage <br /> Way , Sacramento , CA 95825 to complete the needed work on the above <br /> location . I am working with Mr . Hunter on this project and will be <br /> writing the up-date of the Site Assessment Report . This report will <br /> review all work done to date, both by consultants and by Thorpe Oil <br /> Company , and will propose further work regarding ground water . <br /> Three , 2" ground water monitoring wells are in place at the site , <br /> as noted in the May 25 , 1988 report by Groundwater Technology Inc . <br /> that is in your files . These wells were sheared off in the process <br /> of excavating contaminated material , but they have been re- located. <br /> We plan to re-survey these wells , bail out 5 casing volumes of water , <br /> measure ground water elevation and test well water samples for TEH <br /> and BTXE. Details will be outlined in the updated assessment report . <br /> Reportedly , at least one of these wells appeared to be bridged when <br /> they were plumbed by Thorpe Oil Co . We would like to re-enter these <br /> wells to check for fill , and if bridging is found , purge them with <br /> City water , using either a garden hose or small , plastic tubing . <br /> Once the wells are clean , they would be tested as noted above . <br /> Based on a review of data supplied by Thorpe Oil Co. , it appears <br /> that all contaminated material has been excavated and stored on site . <br /> The excavation is considerably larger than that previously reported <br /> and was dug to about 45 feet , which penetrated the water table about <br /> 5 feet . Samples of seepage into the pit were analyzed by Canonie <br /> Labs . for BTXE (EPA 602 ) and TEH (EPA 3510 ) and no detectable hydro- <br /> carbons were found . Because seepage can be assumed to be circular <br /> into the pit , it appears that no contaminated material remains and <br /> that the groundwater has not been contaminated . These , and other <br /> sampling and testing will bes-�-_rssed in the Assessment Report <br /> Up-date . <br /> Ver truly youy s , rj " ' R ���F`lC7t, <br /> A. <br /> Dennis R. Allen <br />