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r. <br /> SNrFN <br /> �'•' ENVIRONMENTALTECHNOLOGIESCOAPORATIOH <br /> August 29, 1995 <br /> 94-369-001-T10 <br /> Ms. Linda Turkatte <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject: Site Status Report, April through June 1995, Smith Canal Pump Plant, Fontana <br /> Street and Smith Canal, Stockton, California, Site Code 1102 <br /> Ms. Turkatte: <br /> This letter report summarizes groundwater monitoring activities at the above referenced site <br /> (Figure 1) during the second quarter of 1995. These activities included monitoring fluid levels in <br /> all site wells and collecting groundwater samples from wells MW3 and MW6 for laboratory <br /> analysis. <br /> FIELD WORK <br /> s� r s <br /> On June 1 and June 28, 1995, static fluid levels were measured in monitoring wells MW1 / <br /> through MW6. The water table elevation decreased an average of 1.85 feet since March 24"L// <br /> 1995. Table 1 summarizes the water level data collected during the reporting period and provides <br /> previous data for comparison. <br /> A groundwater gradient map was created for the June 1, 1995 monitoring event (Figure 2) using <br /> groundwater elevation data from all the wells monitored. The groundwater elevation in MW4 <br /> appears to be anamolous, possibly due to a depression caused by the floating product measured in <br /> the well. Figure 2 depicts a gradient which varies from approximately 0.0029 ft/ft (15 ft/mile) in <br /> the northern portion of the site to approximately 0.013 ft/ft (69 ft/mile) in the southern portion of <br /> the site with a groundwater flow direction toward MW4. <br /> Floating petroleum product was observed in well MW4 during both monitoring events in June / <br /> 1995. Approximately 4.3 liters and 1.1 liters of free product were recovered from the well onv/ <br /> June 1 and June 28, respectively. Table 2 summarizes the product thickness measurements and <br /> volume of product removed from previous monitoring events. All bailed product has been stored <br /> in a DOT approved double containment drum pending appropriate disposal. <br /> Groundwater samples were collected on June 1, 1995 from wells MW3 and MW6. No <br /> groundwater samples were collected from MW4 due to the presence of free product. Prior to <br /> 1501151QRTSRLYI2QMR 1995.doc <br /> 1710 Main Street • Escalon,CA 95320 • (209)838-3507 • fax(209)838-3509 <br /> Engineering Consulting • Remedialion • Construction <br />