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�_. Geological Audit Services, Inc® E111EA1 Tit <br /> Y; ,,, ,{ 4 <br /> wEnvironmental Professionals <br /> vlow 1803W.March Lane,Suite A•Stockton,CA 95207•(209)956-0264•FAX(tq) 1QQ P* <br /> October 1100, 1993 �S <br /> (GeoAudit 640—S) <br /> Mr. James DeMera <br /> MULLEN, SULLIVAN & NEWTON <br /> P. O. Box 560 <br /> Lodi, CA 95241-0560 <br /> Subject: Quarterly Monitoring Report - Puregro Company <br /> 1904 West Charter Way, Stockton, California <br /> Dear Mr. DeMera: <br /> At your request, Geological Audit Services., Inc. (GeoAudit) visited <br /> the property at 1904 West Charter Way in Stockton, California (the <br /> site) to perform minimum quarterly monitoring procedures. <br /> On September 30, 1993 , the depth to groundwater in the five <br /> monitoring wells on the site was measured. Mr. Michael Infurna of <br /> the San Joaquin County Public Health Services - Environmental <br /> Health Division (PHS/EHD) was present to observe the measurements. <br /> Table 1 summarizes the results of the monitoring. No groundwater <br /> samples were collected at this time to monitor the present <br /> groundwater quality. <br /> TABLE 1 <br /> GROUNDWATER ELEVATIONS <br /> Depth to Groundwater <br /> Well No. Casing Groundwater Elevation <br /> Elevation 2/24/93 9/30/93 2/24/93 9/30/93 <br /> MW-1 26.90 14 . 14 15.98 12 .76 10.92 <br /> MW-2 26. 93 14 . 36 16. 39 12 . 57 10. 54 <br /> MW-3 26. 84 12 . 88 13 . 94 13 .96 12 .90 <br /> MW-4 26. 79 13 .76 14 . 51 13 . 03 12.28 <br /> MW-5 29 . 13 15.56 16. 60 13 . 57 12. 53 <br /> * All measurements in feet <br /> The depth to groundwater has dropped approximately 2 feet in each <br /> well during the second and third quarters of 1993 . Groundwater <br /> gradient and direction, calculated using., monitoring wells #1, #3 <br /> and #4 , is 0. 024 ft/ft in a northeast direction (N 590 E) . The <br /> �- results of this monitoring event yield very similar groundwater <br /> gradients to those from the initial (February) monitoring event. <br /> 1 <br /> Full Spectrum Environmental Services• Hydrogeology <br />