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TABLE 1 <br /> UNDERGROUND STORAGE TANKS <br /> Hess-Dubois Cleaners <br /> 348 West Harding Way, Stockton, California <br /> Tank Identification Volume (Gallons) <br /> Product <br /> ' Tank #1 2000 Stoddard Solvent <br /> Tank #2 1800 Stoddard Solvent <br /> ' Tank #3 2000 Stoddard Solvent <br /> Tank #4 500 Stoddard Solvent <br /> Tank #5 1370 Stoddard Solvent <br /> ' Tank #6 5000 Stoddard Solvent <br /> Tank #7 500 Stoddard Solvent <br /> ' Tank #8 500 Stoddard Solvent <br /> ' 2.3 Monitoring Well Installation and Sampling <br /> Three groundwater monitoring wells were installed at the site on October 26, 1993. The <br /> wells were installed under the supervision of John P. Cummings & Associates (JPA). A total <br /> of 23 soil samples were analyzed by Sparger Technology, Inc. (SPI) for TPH as stoddard <br /> ' solvent and BTE&X. <br /> No TPH as stoddard solvent or BTE&X-,were detected in the soil samples collected during <br /> 1 the installation of MW-1 or MW-2. However, TPH as stoddard solvent was detected in <br /> samples from MW-3 at concentrations up to 2,000 ppm (NIW-3 16'); toluene, ethylbenzene <br /> and xylenes were detected in samples from MW-3 at concentrations up to 51 ppm (xylenes, <br /> MW-3 16'). The analytical results of the soil samples are summarized in Table 2. <br /> Groundwater samples were collected from each well on November 4, 1993 by representatives <br /> ' of JPA. The samples were analyzed for TPH as stoddard solvent and BTE&X by SPL TPH <br /> and BTE&X were detected in each well. The analytical results of groundwater samples are <br /> included in Table 4. <br /> 2.4 Monthly Monitoring <br /> Monthly monitoring was conducted from May 1994 to October 1994 to establish a consistent <br /> groundwater flow direction. GeoAudit recommended discontinuing monthly monitoring in <br /> the third quarterly report for 1994. The San Joaquin County Public Health Services - <br /> ' Ow6,0.1 Audis Servio<a,Inc. 4 <br /> . H_i)[ Boi3 QR02-26-93,973 <br /> 1 <br />