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MIAMI <br /> .�.�s a-'" ry g'`a., ' �� � '3`�`-s c-y �` "''- a ��3'',tOW41011 <br /> .0 rA -tE'.a - �'y" " AAs <br /> a <br /> ' ma-'� 1 �-' <br /> Y¢ <br /> 2 <br /> The 10,000- gallon tank was inspected upon removal and did not display any <br /> signs of compromised integrity. The tank fill pipe was located on the east <br /> end of the tank. As reported in Appendix A, a soil sample from the east <br /> sidewall of the excavation showed noizdetectable levels of both BTXE and <br /> total extractable petroleum hydrocarbons (TEPH). <br /> Based on the results of the two soil samples and the observations made <br /> during the excavation, it is believed that the source of diesel fuel <br /> release to the environment was either the surface pump installation located <br /> ! near the west end of the tank or spillage associated with dispensing of <br /> fuel from this pump. Therefore, the volume of diesel fuel released to the <br /> '— environment is estimated to be small (less than 100 gallons)..;.: g ). The document ' <br /> "Work Plan: Soil Remediation, POM Strocal Site," prepared by Canonie <br /> Environmental Services Corp., +fay 12, I989, describes proposed activities <br /> k <br /> to remedy the release of diesel fuel to the soils (unsaturated zone), <br /> { stockpiling of the excavated materials, and backfill of the excavation. <br /> During the excavation <br /> . _ , ground water was observed in the bottom of the 0 <br /> Lj <br /> excavation at a depth of 10 feet from the ground surface. Duringthe s a0,4 ,1 <br /> removal of the tank, some soils from the western wall of the excavation �� 3 <br /> '4 fell down into the ground Crater. <br /> (As noted above, soils from this area <br /> i have been confirmed as contain.r, <br /> 4 diesel fuel.) Subsequently, the ground . <br /> water in the bottom of the excavation was sampled. As shown in Appendix A, <br /> the ground water sample showed the presence of diesel fuel (TEPH) at <br /> r 2400 milligrams per liter (mg/l-). The water showed nondetectable levels of <br /> BTXE.. Additionally, a water sample was taken from the existing ;monitoring �f <br /> 4 1Z <br /> well (M-1) located 20 feet northwest of the excavation as shown on <br /> Figure 2. Laboratory analyses contained in Appendix A report that this water sample showed nondetectable levels of diesel fuel and other <br /> rY consti#vents. The discrepancy between the water sample from the excavation <br /> 2400 <br /> ( ppm) and the water sample from the well (nondetectab]e) <br /> to--contamination-of excavation water by sloughing soils during --— <br /> `max r tank removal. <br /> � a <br /> '' �" �t����Environmenfi�l <br />