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November 14, 1996: Ground Zero conducted groundwater sampling. The depth to water <br /> in well MW1 was 40.32 feet below grade. Groundwater fell 0.29 <br /> feet. Analyses indicate minor groundwater impact from MTBE. <br /> TPHg and BTEX were not detected. <br /> ' <br /> June 2 1999 Ground Zero sampled groundwater from MW 1. Water samples did <br /> ' not contain detectable concentrations of TPHg or BTEX. Low levels <br /> of MTBE were present. <br /> July 29, 1999 Fisch Environmental of Valley Springs, California advanced borings <br /> ' 1HP1 through 1HP3 to depths of approximately 36 feet below grade. <br /> Soil samples collected from the borings had non detectable levels of <br /> ' petroleum hydrocarbons and MTBE. Groundwater samples from <br /> borings HP2 and 1HP3 were non-detect for all analytes. The <br /> groundwater sample from HPI contained 180 ppb TPHg and 27 ppb <br /> ' benzene. All other analytes were non-detect. <br /> November 18, 1999: Spectrum Exploration of Stockton, California drilled boring HP4 to a <br /> ' depth of 36 feet bgs. Analysis of the soil and groundwater yielded <br /> non-detectable levels of petroleum hydrocarbons and oxygenate fuel <br /> additives. <br />