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sY HORIZON ENVIRONMENTAL INC. <br /> Specialists in Site Assessment Remedial Testing, Design and Operation <br /> �r <br /> March 22, 2006 2006 , <br /> ��R 24 Ar'�11: 45 <br /> Mr Mike Karvelot �E S.9NJC);0b1"1] 0U"1TI <br /> Erll fk'ONi9E?_gTAL <br /> Quik Stop Markets Inc !�f :L;H L)E}', R T MEN <br /> 4567 Enterprise Street <br /> Fremont, California 9453801-14 <br /> 4538 � <br /> - o�� G <br /> Subject Quarterly Groundwater Monitoring Report Y R 6&0 3�z? � <br /> First Quarter 2006 <br /> Quik Stop Station No 076e <br /> 1030 South Olive Avenue, Stockton, California <br /> Mr Karvelot <br /> Horizon Environmental Inc (Horizon) has prepared this report which documents first <br /> quarter 2006 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 February 8, 2006 <br /> according to Horizon Field Methods and Procedures (AttaLhment 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 top-of-casing <br /> (TQC) 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 (FLAP 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), diisopropyi ether <br /> (DIPS), ethyl-t-butyl ether (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TSA) <br /> and 1,2-dichloroethane (DCA) and 1,2-dibromoethane (EDB) by Environmental <br /> Protection Agency(EPA) Method 8260B <br /> w <br /> 4970 Windplay Drive,#C5 - EI Dorado Hills CA 95762 - (916)939-2170 - FAX(916)939-2172 <br /> PO Box 5283 - Bakersfield,CA 93388 - (661) 589-8389 - FAX(661)589-1456 <br />