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1260 Graphics Drive <br /> V Modesto, California <br /> 95351 <br /> %Tc <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> 1 ;! . - <br /> A S S 0 C I A T E S I N C . <br /> rrr�jy <br /> June 3, 1998 <br /> 62574 <br /> Mr. Jeff Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> E <br /> Subject: Site Status Report, Second Quarter 1998, Smith Canal Pump Plant, Fontana Street <br /> F <br /> and Smith Canal, Stockton, California, Site Code 1102 <br /> Mr. Wong: F <br /> This letter report summarizes groundwater monitoring activities at the above referenced site <br /> (Figure 1) during the second quarter of 1998. These activities included monitoring fluid levels in <br /> `==f all site wells and collecting groundwater samples from wells MW3 and MW6 for laboratory <br /> analysis. <br /> FIELD WORK <br /> On April 3, 1998, static fluid levels were measured in monitoring wells MWl through MW6. The <br /> water table elevation increased an average of 2.09 feet since January 9, 1998 and is at the highest <br /> elevation since monitoring began. Table 1 summarizes the water level data collected during the <br /> reporting period and provides previous data for comparison. <br /> A groundwater gradient map was created for the April 3, 1998 monitoring event (Figure 2) using <br /> groundwater elevation data from all the wells monitored. Figure 2 depicts a generally east <br /> groundwater flow direction at a magnitude of approximately 0.003 ft/ft or 16 ft/mile. E <br /> Floating petroleum product was observed in well MW4 on April 3, 1998. No free product was <br /> recovered from the well because the quantity was too small to be collected into a bailer. Table <br /> 2 summarizes the product thickness measurements and volume of product removed from previous <br /> monitoring events. All bailed product has been stored in a DOT approved double containment <br /> drum pending appropriate disposal. <br /> Groundwater samples were collected on April 3, 1998 from wells MW3 and MW6. No <br /> groundwater sample was collected from MW4 due to the presence of free product. Prior to <br /> wA943691quaftIyl2gmr1998.doc l <br />