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fq <br /> HORIZON ENVIRONMENTAL INC. <br /> * Specialists in Site Assessment Remedial Testing Design and Operation <br /> July 8, 2004 <br /> Mr Mike Karvelot <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 039 <br /> 2285 East Fremont Street, 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 I There are currently three groundwater monitoring wells (MW-1 <br /> through MW-3) as shown on Figure 2 <br /> Groundwater Monitoring <br /> Groundwater monitoring activities were conducted by Horizon on June 16, 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 wells, collection of groundwater samples, disposal of purge water, and preparation <br /> and delivery of the samples to the analytical laboratory <br /> The depth to groundwater was measured to the nearest 0 01 foot from the top-of-casing <br /> (TOC) in monitoring wells MW-1 through MW-3 The groundwater physical parameters <br /> conductivity, pH and temperature were monitored with field instrumentation during the <br /> purging process The visual characteristics of turbidity and presence of free product or <br /> sheen if any, and the obvious olfactory characteristics of the groundwater were also noted <br /> during the purging process Field groundwater level and purge data were recorded on <br /> Monitoring Well Data sheets (Attachment B) <br /> Groundwater samples were collected from groundwater monitoring wells MW-1 through <br /> MW-3 and were submitted, under chain-of-custody (COC) documentation, to Kiff <br /> Analytical LLC (Kiff), a California Department of Health Services-certified analytical <br /> laboratory (ELAP No 2236) located in Davis, California The samples were analyzed for <br /> total petroleum hydrocarbon as gasoline (TPHg), the volatile aromatic compounds <br /> • benzene, toluene, ethylbenzene and total xylenes (BTEX), the fuel oxygenates methyl-t- <br /> butyl ether (MTBE), diisopropyl ether (DIPE), ethyl-t-butyl ether (ETBE), tert-amyl <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 />