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4 <br /> t � <br /> HORIZON ENVIRONMENTAL INC. <br /> t Specialists in Site Assessment Remedial Testing glet?"In <br /> f� <br /> July 8, 2004 JUL 0 9 2004a <br /> ENVIRONMENT HEALTH ya <br /> PERMIT/SERVICES <br /> Mr Mike Karvelot ru i ( <br /> Quik Stop Markets Inc <br /> 4567 Enterprise Street <br /> Fremont, California 94538 <br /> Subject Quarterly Groundwater Monitoring Report <br /> Second Quarter 2004 <br /> Quik Stop Station No 076 <br /> 1030 South Olive Avenue, Stockton, California <br /> Mr Karvelot <br /> Horizon Environmental Inc (Horizon) has prepared this report which documents second <br /> quarter 2004 groundwater monitoring at the subject site located in San Joaquin County as <br /> shown on Figure 1 There is currently one groundwater monitoring well (MW-1) at the <br /> site as shown on Figure 2 <br /> • Groundwater Monitoring <br /> Groundwater monitoring activities were conducted by Horizon on June 10, 2004 <br /> according to Horizon Field Methods and Procedures (Attachment A) Monitoring <br /> activities included measurement of static groundwater level, purging groundwater from <br /> the well, collection of groundwater samples, disposal of purge water, and preparation and <br /> delivery of the samples to the analytical laboratory <br /> The depth to groundwater was measured to the nearest 0 01 foot from the tap-of-casing <br /> (TOC) in monitoring well MW-1 The groundwater physical parameters conductivity, <br /> pH and temperature were monitored with field instrumentation during the purging <br /> process The visual characteristics of turbidity and presence of free product or sheen if <br /> any, and the obvious olfactory characteristics of the groundwater were also noted during <br /> the purging process Field groundwater level and purge data was recorded a Monitoring <br /> Well Data sheet (Attachment B) <br /> Groundwater was collected from monitoring well MW-1 and was submitted, under chain- <br /> of-custody (COC) documentation, to Kiff Analytical LLC (Kiff), a California Department <br /> of Health Services-certified analytical laboratory (ELAP No 2236) located in Davis, <br /> California The sample was analyzed for total petroleum hydrocarbon as gasoline <br /> (TPHg), the volatile aromatic compounds benzene, toluene, ethylbenzene and total <br /> xylenes (BTEX), the fuel oxygenates methyl-t-butyl ether (MTBE), dilsopropyl ether <br /> w (DIPS), ethyl-t-butyl ether (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TBA), <br /> 5011 Golden Foothill Parkway Suite 7 • El Dorado Hills CA 95762 • (916) 939-2170 • FAX (916) 939-2172 <br /> P 0 Box 5283 • Bakersfield CA 93388 • (661) 589-8389 • FAX (661) 589-1456 <br />