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ARTESIAN I NVIKONMENTAL CONSULT ; j[CR',-' �1 ' AL H�E+LALTH ' 93 JUL 19 P14 2. 23 Date July 15, 1993 , y Quarterly Groundwater Monitoring ' Sampled May 14, 1993 1045 W Charter Way Stockton, California ' Project No 040-001-08 Prepared for ' Mr Dante John Nomelhru Nomelhm Construction Company P O Box 1528 ' Stockton, California 95201 ' This report presents the results of the quarterly groundwater monitoring well sampling,performed on May 14, 1993 by Artesian Environmental Consultants (Artesian) at the subject site(Figures 1 and 2) The site history is summarized in Appendix A SITE DESCRIPTION The site is located at 1045 West Charter Way,in Stockton, California A site location map is presented in Figure 1 A map showing the site structure and boring locations ' is presented in Figure 2 The property is located in an industrial area GROUNDWATER SAMPLING ' On May 14, 1993,Artesian staff measured depth to water for sixgroundwater monitoring wells designated MW-1 through MW-6 Monitor wells MW-3, MW-4, ' MW-5 and MW-6 were purged and sampled according to a revised schedule approved by Ms Lunda Turkatte of the San Joaquin County of Environmental Health All groundwater samples were collected according to the Artesian standard operating procedures (SOP) for groundwater sampling included in Appendix B Free product measurements were made with an oil-water interface probe All purged water was temporarily stored in DOT 17-H, 55-gallon containers pending analytical results The groundwater samples were shipped under chain-of-custody to Chromalab, Inc of San Ramon, California, a state-certified laboratory GROUNDWATER FLOW Figure 3 shows the potentiomet is surface of shallow groundwater based on depth-to- water measurements taken on May 14, 1993 The estimated groundwater gradient and flow direction was 0 010 vertical feet per horizontal foot to the east-northeast for the May 14, 1993 sampling event Groundwater-elevation Idata ale presented in Table 1 q C a ��,v