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<br /> 15 January 2002
<br /> AGE-NC Project No 96-0232
<br />' Page 5 of 16
<br />' 2 6 RECEIVING WATER MONITORING
<br /> In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br />' monthly ground water pump-and-treat receiving water(R-1 and R-2)monitoring was performed for
<br /> total dissolved solids, flow rate, specific conductivity (EC), pH and turbidity on 15 October, 07
<br /> November and 12 December 2001, observations noted in a log book(Appendix A) included floating
<br />' or suspended matter, discoloration,bottom deposits, aquatic life, visible film-sheen-coatings, fungi
<br /> and potential nuisance conditions
<br />' Water monitoring could not be performed from R-1 dunng the 15 October, 07 November or the 12
<br /> December 2001 monthly monitoring events because there was no upstream water flow Because
<br /> there was no upstream flow at R-1 and the upstream area was dry, the downstream flow rate at R-2
<br />' appeared to be equal to the ground water pump and treat effluent flow rate of approximately 23 to
<br /> 24 GPM Observations logged In a notebook indicate that there was no floating or suspended matter,
<br />' discoloration,bottom deposits or visible film-sheen-coatings, however there was a small amount of
<br /> algae growth at the bottom of the ditch Visible aquatic life at R-2 included minnows, insects and
<br /> frogs Potential nuisance conditions observed included trash In ditch (I e fast food containers, tire,
<br />' paper and dry bush cuttings)
<br /> Utilizing an ICM water analyzer and a YSI-50 dissolved oxygen meter in the field, dissolved oxygen
<br />' was monitored at R-2 on 15 October, 07 November and 12 December 2001 at concentrations of 7 50
<br /> mg/l, 6 17 mg/l and 5 63 mg/l,respectively,EC values on the same days were at 877,umhos/cm, 890
<br /> ,umhos/cm and 920 /.,.mhos/cm, respectively, pH values were detected at 7 15, 7 21 and 7 13,
<br />' respectively, temperatures were measured 20 7 °C, 19 4 'C and 18 4 °C
<br /> Laboratory analysis of R-2 grab water samples collected on 15 October, 07 November and 12
<br />' December 2001 reported turbidity values at 0 6 NTUs, 2 NTUs and 7 6 NTUs, laboratory analysis
<br /> of R-2 reported TDS values of 420 mg/1, 613 mg/1 and 614 mg/1, respectively Analytical results are
<br /> summarized in Table 2, field measurements and laboratory reports are in Appendix A and Appendix
<br />' C, respectively
<br /> 2 7 MASS-VOLUME REMOVAL CALCULATIONS
<br /> Based on effluent flow meter observations (Appendix A), approximately 2,043,809 gallons of
<br /> MTBE-Impacted water were treated during the fourth quarter 2001, a total volume of approximately
<br /> 9,303,630 gallons of MTBE-impacted water has been treated at the site since the start-up period in
<br /> November 2000
<br /> The volume of extracted water between 06 September and 15 October 2001 was equal to 986,026
<br /> Advanced GeoEnvironmental,Inc
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