Laserfiche WebLink
CAM BRIA <br /> RW-IA and MW-5 at concentrations of 180,000 and 290,000 ppb, respectively. These <br /> data are shown on the chemical concentration map (Plate 2) and are summarized in the <br /> table in Blaine's monitoring report (Appendix A). <br /> • Separate phase petroleum hydrocarbons were not present in Well RW-lA this quarter. <br /> • Ground water samples collected from deep monitoring Wells MW-7 and MW-9 through <br /> MW-14 did not contain 'detectable levels of TPHg, benzene, MTBE or other fuel <br /> oxygenates. <br /> • Ground water samples collected from the Warman well located at 2468- Country Club <br /> Boulevard-(CCB) contained 2,300 -ppb TPHg. MTBE was detected in ground water ! <br /> samples collected from the Caltrans'.irrigation well located on Plymouth Road and the <br /> Franco well located at 2454 CCB at concentrations of 2.2 and 5.3 ppb, respectively. The <br /> ground water sample from the Harris well located at 2456 CCB contained MTBE (by <br /> EPA Method 8020) at a concentration of 8.6 ppb.. However, the. results of the more <br /> s <br /> accurate analytical method. (EPA Method .8260) indicate MTBE is not present in this <br /> f well. No other petroleum hydrocarbons .or fuel oxygenates were detected in the ground <br /> water-samples , <br /> collected from the irrigation well the domestic. wells. The laboratory <br /> analytical results are summarized in the table in Blaine's monitoring report <br /> (Appendix A).. <br /> Quarterly Sampling <br /> Ground water samples were analyzed for Total Petroleum Hydrocarbons as gasoline (TPHg) <br /> according to EPA Method 8015 (Modified), benzene, toluene, ethylbenzene,. and xylenes <br /> (BTEX), and methyl tertiary butyl ether (MTBE) according .to EPA Method 8020, , and <br /> oxygenate compounds according to EPA Method 8260 and EPA 8015 (Modified). <br /> Field monitoring data and chemical analytical data are presented' in a summary table in . <br /> Blaine's ground water"monitoring report (Appendix A). <br /> r <br /> i. Conclusions <br /> The petroleum hydrocarbon and MTBE concentrations in ground water samples collected <br /> from the shallow wells this quarter are within the historical norm for this site. Ground water <br /> ' samples from the Caltrans irrigation well and the private water .wells did not contain <br /> petroleum hydrocarbons and fuel oxygenates, except for the Warman well, which contained <br /> 240-0783 2 <br />