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' ARIES IAN ENVI RON M ENTA I CONS U I TANTS <br />' Date March 20, 1993 <br />' Monitoring Quarterly Groundwater <br /> Sampled February 22, 1993 APR 8 0 1993 <br /> 1045 W Charter Way <br /> Stockton, California ENVIRONMENTAL NEWH <br /> Project No 040-001 <br /> Prepared for <br /> 1 Mr Dante John Nomellini, Esq <br /> Nomellini Construction Company <br />' P O Box 1528 <br /> Stockton, California 95201 <br />' This report presents the results of the quarterly groundwater monitoring well <br /> sampling, performed on February 22, 1993 by Artesian Environmental Consultants <br /> (Artesian) at the subject site (Figures 1 and 2) The site history is summarized in <br />' Appendix A <br /> SITE DESCRIPTION <br /> The site is located at 1045 West Charter Way, in Stockton, California A site location <br /> map is presented in Figure 1 A map showing the site structure and boring locations <br />' is presented in Figure 2 The property is located in an industrial area <br /> GROUNDWATER SAMPLING <br /> On February 22, 1993, Artesian staff measured depth to water for six groundwater <br />' monitoring wells designated MWA through MW-6 In accordance with a revised <br /> sampling schedule approved by Ms Linda Turkatte of the San Joaquin County <br /> Division of Environmental Health, only monitor well MW-4 was purged and <br /> sampled All groundwater samples were collected according to the Artesian standard <br />' operating procedures (SOP) for groundwater sampling included in Appendix B Free <br /> product measurements were made with an oil-water interface probe <br />' All purged water was temporarily stored in a DOT 17-H, 55-gallon container pending <br /> analytical results The groundwater samples were shipped under chain-of-custody to <br /> Chromalab, Inc of San Ramon, California a state-certified laboratory <br />' GROUNDWATER FLOW <br />' Figure 3 shows the potentiometric surface of shallow groundwater based on depth-to- <br /> water measurements taken on February 22, 1993 The estimated groundwater <br /> .j gradient was 0 011 vertical feet per horizontal foot for the February 22, 1993 <br />' sampling event Groundwater-elevation data are presented in Table 1 The estimated <br /> groundwater flow direction at the site in February 22, 1993 was toward the southeast <br /> 1 <br />