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rf <br /> " I <br /> � 1050 Melody Lane, Suite 160,tRof� sevilliPi�{,^"�dcT11fornla 95678 <br /> ,61,-9-A& E�' _ 97 ,7 770 Fdx(976)786 7830 <br /> ENVIRONMENTAL, INC. 07 <br /> r �� <br /> July 30, 1993 <br /> Mr Kenneth Earnest <br /> Environmental Specialist <br /> Ultramar Inc <br /> 525 West Third Street <br /> Hanford, California 93232-0466 <br /> Subject Groundwater Monitoring Report <br /> r� Beacon Station #492 <br /> 470 N Main Street, Manteca, California <br /> Dear Mr. Earnest <br /> Aegis Environmental, Inc (Aegis), is pleased to provide Ultramar Inc this report <br /> documenting the results of quarterly groundwater monitoring conducted on April 7, 1993, <br /> at the subject site (Figure 1) The monitoring included measurements of depth to water, <br /> subjective analysis of free product, and collection of groundwater samples. <br /> GROUNDWATER ELEVATIONS <br /> Prior to purging, Aegis personnel collected measurements of depths to groundwater in <br /> all four wells on April 7, 1993 Groundwater level data from February 1992 to date, are <br /> summarized in Table 1 Previous groundwater level data are included in Attachment 3 <br /> All measurements of depths to groundwater were conducted according to the Aegis <br /> standard operating procedures (SOP) included in Attachment 1. On the basis of the <br /> current measurements, groundwater is estimated to flow to the north-northeast (Figure 2) <br /> at an average gradient of approximately <0 01 ft/ft In general, groundwater levels have <br /> increased 3 35 feet compared to the last monitoring event in July 1992 <br /> 93-703A RPT <br />