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December 22, 1994 <br /> 92-1177103.80 <br /> NORCAL Waste Systems, Inc. <br /> Attention: Mr. Larry Sweetser, Director of Regulatory Affairs <br /> Subject: REPORT - Quarterly Groundwater Monitoring - November 1994 <br /> Stockton Scavenger Association Facility <br /> 1240 Navy Drive <br /> Stockton, California <br /> Page 2 <br /> ■ Recording groundwater field parameters (pH, temperature, specific conductance, and <br /> turbidity) from each well; <br /> ■ Analyzing the samples for total petroleum hydrocarbons as diesel (TPH-D), total <br /> petroleum hydrocarbons as gasoline (TPH-G), and purgeable aromatic compounds <br /> (BTEX); and <br /> ■ Preparation of this report which includes the results and conclusions regarding the site <br /> groundwater quality. <br /> Water Level Measurements <br /> On November 1, 1994, MARK staff recorded water levels from monitoring wells MW-1, <br /> MW-3 and MW-4. The water level was not measured in pumping well MW-2. <br /> Static water levels in the monitoring wells were measured using an electronic sounder-tape <br /> within a one hour period prior to purging the wells. The data was used to interpolate the <br /> potentiometric groundwater surface at the site. Water level measurements for the current and <br /> previous monitoring rounds are presented in Table 1. A copy of the recent water level <br /> measurement form is attached to this letter. <br />