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27 October 2000 <br /> AGE-NC Project No. 98-0497 <br /> Page 7 of 8 <br /> mg/kg and 40 mg/kg, respectively. <br /> _ No oxygenated compounds, EDB or 1,2-DCA were detected in the soil samples analyzed. <br /> Analytical results of soil samples are summarized on Table 2 and Table 3. The laboratory reports <br /> (MAI Laboratory I.D. No. 45266-45286),quality assurance and quality control(QA/QC)report and <br /> chain-of-custody forms are included in Appendix C. <br /> 4.3. GROUND WATER ELEVATION AND GRADIENT <br /> The average relative ground water elevation on 23 August 2000 was approximately 34 feet below <br /> ms], with the average depth of water at 59.23 feet below casing grade. The ground water table <br /> occurred within the screened intervals of the wells monitored. <br /> Ground water was inferred to be flowing east(Figure 3). The ground water gradient was determined <br /> to be approximately 0.013 ft/ft west and down-gradient of the former UST area. <br /> -- 4.4. ANALYTICAL RESULTS FROM GROUND WATER SAMPLES <br /> CAL received, extracted and analyzed the ground water samples on 25 and 28 August 2000. <br /> CAL issued a report dated 07 September 2000. The analytical results from the 23 August 2000 <br /> ground water samples are as follows: <br /> • TPH-g was detected in MW-I at a concentration of 5,700 micrograms per liter (µg/l). <br /> Benzene was detected in the ground water sample from well MW-1 at a concentration of <br /> 1.7 �ig/l. No other BTEX compounds were detected in ground water samples analyzed. <br /> • TPH-d was detected at a concentration 120,000 µg11 in the sample from well MW-1. <br /> • No fuel oxygenates were detected in the three ground water samples collected. <br /> • TBA and ETBE were detected at low concentration in the ground water samples collected <br /> from wells. <br /> Laboratory results of water samples analyzed for petroleum hydrocarbons are summarized in <br /> Tables 4 and 5. The laboratory reports for the quarterly monitoring event (CAL Lab Nos. 3178- <br /> 1 W through 3178-3W and MAI Lab ID Nos. 46106 through 46108) QA/QC reports and chain- <br /> of-custody form are included in Appendix D. <br /> Advanced GeoEnviroiunental,Inc. <br />