Laserfiche WebLink
1117 lone Palm Avenue, Suite B <br /> v Modesto, CA 95351 <br /> www.atc-enviro.com <br /> 209.579.2221 <br /> TC Fax 209.579.2225 <br /> A S S O C I A T E S I N C <br /> February 26, 2003 <br /> 54.62574.0002 F E B 2 8 2003 <br /> ENVlRUNMk---N'I <br /> PER;1111T:,"SER- Vi CLS <br /> Mr. Jeff Wong <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Site Status Report and Case Closure Request, First Quarter 2003, Smiths Canal <br /> Pump Plant, 2144 Fontana Street, Stockton, California, Site Code 1102 <br /> Mr. Wong: <br /> This letter report summarizes groundwater monitoring activities at the above referenced site <br /> (Figure 1) during the first quarter of 2003. These activities included monitoring fluid levels in all <br /> site wells and collecting groundwater samples from wells MW1, MW2, MW3, MW4, MW5, <br /> MW6, and MW7 for laboratory analysis. <br /> FIELD WORK <br /> On January 22, 2003, static fluid levels were measured in monitoring wells MW 1 through MW7. <br /> The water table elevation increased an average of 0.93 feet since October 2002, Table 1 <br /> summarizes the water level data collected during the reporting period and provides previous data <br /> for comparison. <br /> A groundwater gradient map was created for the January 22, 2003 monitoring event (Figure 2) <br /> using groundwater elevation data from all the wells monitored. Figure 2 depicts a generally <br /> northern groundwater gradient direction at a magnitude of approximately 0.003 ft/ft or 14 ft/mile. <br /> Floating petroleum product has previously been observed in well MW4. On January 22, 2003, <br /> only a slight sheen was observed in well MW4. No free product was recovered from the well <br /> because the quantity was too small to be collected into a bailer. Table 2 summarizes the product <br /> thickness measurements and volume of product removed from previous monitoring events. <br /> Groundwater samples were collected on January 22, 2003 from wells MW 1 through MW7. Prior <br /> to sample collection, each well was purged of a minimum of three well casing volumes of water. <br /> Purged water was contained in labeled 55-gallon drums (DOT H) and stored on site. <br /> w:162574.021quartlyugmnao3.doc 1 <br /> ENVIRONMENTAL, GEOTECkNICAL AND MATERIALS PROFESSIONALS <br />