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AEGIS ENVIRON MENTAL , INC <br /> 1050 Melody Lane, Susie 160, Flosevilie,CA 95678 ♦ 916.782-2110 1916.969-2110 I FAX 916.786-7830 <br /> February 2, 1993 RE V; , <br /> L D <br /> F E B 1 1 1993 <br /> ENVIRONMENTAL HPALT11 <br /> Mr Kenneth Earnest PERMIT/SERVICES <br /> � <br /> Environmental Specialist <br /> Ultramar Inc <br /> 525 West Third Street <br /> Hanford, California 93232-0466 <br /> Subject Fourth Quarter 1992 Groundwater Monitoring Report <br /> Beacon Station #494 <br /> 2185 Fremont Street, Stockton, California <br /> Dear Mr Earnest <br /> Aegis Environmental, Inc (Aegis), is pleased to provide Ultramar Inc , this report <br /> JOctober <br /> documenting the results of quarterly groundwater monitoring, conducted on <br /> 29, 1992 at the subject site (Figure 1) The monitoring included measurements <br /> water in and total depths of three wells (MW-1, MW-2, and MW-3) on the site <br /> o�� e��o <br /> (Figure 2) Groundwater samples were collected from all three wells <br /> GROUNDWATER ELEVATIONS <br /> Aegis personnel collected measurements of the depth to groundwater in wells MW-1, <br /> MW-2, and MW-3 prior to purging and sampling on October 29, 1992 Current <br /> groundwater level data and prior 1992 data only are summarized in Table 1 Previous <br /> groundwater level data are included in Attachment 3 All measurements of depth to <br /> groundwater were made to the nearest 0 01 foot from the referenced wellhead (top-of- <br /> casing) elevations and conducted accordiN to the Aegis standard operating procedures <br /> (SOP) included in Attachment 1 On thesis of the October 29, 1992, measurements, <br /> groundwater is estimated is flow to the northwest (Figure 2) at an average gradient of <br /> approximately0045 ft/ft In general, group wa er levels have decreased compared to <br /> the previous quarter <br /> 92-790A RPT <br /> GEOLOGISTS - ENGINEERS - GROUNDWATER SCIENTISTS <br />