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4.4 Surface Water <br />No fuel hydrocarbons in concentrations above detection limits were <br />found in water samples collected from the surface and subsurface locations <br />in the vicinity of the Marina. Areas sampled are shown on Drawing 4, and <br />the analyses are in Table 4.4. <br />4.5 Air <br />Air samples were taken at three locations during a two day period. The <br />results of analyses indicate that concentrations of volatile hydrocarbons <br />are not detectable at the Marina. Concentrations were detected at the <br />landfill; however these concentrations are below state limits. <br />The concentrations of benzene, toluene and xylene together with state <br />concentration limits for these constituents in the work environment are <br />presented in Table 4.5 below. <br />Table 4.5: Concentrations of Select Volatile Hydrocarbons <br />for Air Samples, ppm <br />Location <br />Number Date Benzene Toluene Xylene <br /> <br />1 3/06/86 0.006 0.003 <0.002 <br /> <br />2 3/11/86 0.056 0.161 0.146 <br /> <br />3 3/11/86 <0.018 <0.017 <0.015 <br /> <br />4 3/11/86 <0.020 <0.019 <0.016 <br /> <br />5 3/06/86 <0.008 <0.008 <0.006 <br /> <br />6 3/11/86 <0.020 <0.019 <0.016 <br /> <br />7 3/11/86 0.011 <0.008 <0.007 <br />8f 3/11/86 0.097 0.178 0.143 <br /> <br />9 3/11/86 <0.020 <0.019 <0.016 <br /> <br />10 3/11/86 <0.020 <0.019 <0.016 <br /> <br />11 3/11/86 0.021 0.023 0.010 <br /> <br />12 3/11/86 <0.014 <0.013 <0.011 <br /> <br />13 3/11/86 0.016 0.017 <0.008 <br /> <br />14 3/11/86 0.134 0.253 0.294 <br /> <br />15 No Sample Collected <br /> <br />16 3/11/86 <0.009 <0.008 <0.007 <br /> <br />17 3/11/86 <0.011 <0.011 <0.009 <br /> <br />18 3/11/86 0.019 0.022 0.010 <br /> <br />19 3/11/86 <0.020 <0.019 <0.017 <br />State Limit* 10 100 100 <br />* 8 hour average; Ref. Title 8, CAC, General Industry Safety Order, <br />Section 51-55, Table AC-2 <br />4-5