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i <br /> IT� 2220 Loma Vista Dr. <br /> 4 Wm. J T. Hunter & Associates Sacramento, CA 95825 5 <br /> ,.' Registered Geologists (916) 972-7941 <br /> '� Aroleum& Mineral Appraisers,, no, FAX(916) 972-1683 E1 <br /> ow U <br /> RECEIVt: <br /> January 28, 1993 FEB <br /> F <br /> ENVIRONMENTAL HEALTH <br /> Linda Turkatte REHS PERMITO� , II �$ <br /> San Joaquin Co:' FHS �r .. <br /> Environmental Health Division <br /> 445 No. Sart Joaquin Street <br /> Stockton; CA 95202 ' <br /> Reft 2969 Loomis Road (Site Code 2415; ) Quarterly Report, <br /> monitoring well data 1 <br /> Dear Ms. Turkatte; <br /> We have enclosed a copy of the field log, chain of custody form, <br /> and laboratory analysis of a water sample taken from MW 01 an �. <br /> December- 30, 1992. Water level measurements were taken in MW 42 3` <br /> & -#3, but water; samples were not collected. The results of the <br /> laboratory and ysi s reveals that all tested substanceis were below <br /> detection levels. <br /> We have also included an updated exhibit showing the direction of <br /> hydraulic gradients as indicated by the four water level measure- <br /> ments taken. toi'pdatey. That data indicates the direction of flow + <br /> has changed again from a southerly direction, (9/15/92, ) to due <br /> north, (12/20/92 data, ) The current gradient as measured places <br /> MW #1 downgradient from the site of the removed UST'st the water <br /> samples taken during that measurement did not reveal any <br /> contamination. <br /> The reason forithis frequent change in gradient is not known, but <br /> is fairly common in this area. It appears' that the placement of <br /> one or more additional monitoring wells isnot warranted at this <br /> time. We recommend that the quarterly monitoring be continued at ' <br /> least until sufficient data is available to indicate some concis- <br /> -tency in the direction of the hydraulic gradient. <br /> Yours rul „ <br /> Willi Hunter, <br /> us. hunter Associates <br /> incl : i <br /> ti cc: John Marci ii <br /> i <br /> I <br /> i <br />