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Fivi,q'110NMENTAL HEALTH <br /> AEGIS ENVIRONMENTAL , rI.,NC . (�q <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 ♦ 916.782-2110 1 916.969-211Q 1 FAX 916-% 7$30 <br /> June 29, 1993 <br /> Mr. Kenneth Earnest <br /> Environmental Specialist <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93232-0466 <br /> Subject: Second ©uarter 1993 Groundwater Monitoring Report <br /> Beacon Station #502 <br /> 35 North Cherokee Lane, Lodi, California <br /> �i 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 14, 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 on <br /> April 14, 1993. Groundwater level data from May 1992 to date, are summarized in <br /> Table 1. Previous groundwater level data are included in Attachment 3. Measurements <br /> of depths to groundwater were conducted according to the Aegis standard operating <br /> procedures (SOP) included in Attachment 1. On the basis of the April 14, 1993, <br /> measurements, groundwater is estimated to flow generally to the southeast (Figure 2) at <br /> an average gradient of approximately 0.015 ft/ft. In general, groundwater levels have <br /> increased compared to the February 1993 event. <br /> 92-791 c.RP r <br /> GEOLOGISTS • ENGINEERS GROUNDWATER SCIENTISTS <br />