|
I
<br /> =i 4 T r
<br /> f �
<br /> i 31 January 2003 ` r
<br /> . AGE-NC Project No 96-0232
<br /> iPage 12 of 17
<br /> • Inorganic compounds including Aluminum,Antimony,Arsenic,Asbestos,Barium,Beryllium,
<br /> iCadmium, total Chromium, Chromium VI, Copper, Cyanide, Fluoride, Iron, Lead, Mercury,
<br /> Manganese, Nickel, Selenium, Silver, Thallium, Tributyltin and Zinc by various EPA
<br /> i Methods,
<br /> • General mineral constituents including Ammonia,Chloride,Hardness,Foaming Agents,Nitnte
<br /> as Nitrogen, total Phosphorus, Sulfate, Sulfide and Sulfite by various EPA Methods
<br /> i Be E will mi above analytical results and
<br /> Because of lengthy laboratory turn-around times, AG submit the a yt
<br /> tabulation as an addendum to this quarterly report
<br /> ' k
<br /> i5.0. SUMMARY OF FINDINGS FROM QUARTERLY ACTIVITIES
<br /> Previous soil characteristics data obtained by a CPT investigation enabled AGE to define five
<br /> informal hydrologic units (Final Remediation Plan, dated 31 August 2000) The informal
<br /> i hydrogeologic units were defined as First Zone (10-35 feet bsg);Second Zone (40-60 feet bsg),
<br /> Rocky's Upper Zone (65-75 feet bsg), Secondary Aquifer Zone (85-105 feet bsg), and Primary
<br /> iAquifer Zone,(130-150 feet bsg)
<br /> The domestic drinking water well (RDW-1), formerly located at the Rocky's Restaurant, was
<br /> i properly abandoned under SJCEHD permit on 26 March 2002 The Rocky's Upper Zone was the
<br /> shallowest ground water zone screened in the former Rocky's Restaurant domestic drinking water
<br /> well
<br /> The results of pump and treat ground water remediation between 05 September and 05 December
<br /> 2002 are as follows
<br /> • Approximately 1,169,835 gallons of MTBE-impacted ground water were extracted from
<br /> wells EW-4, EW-5, EW-8, EW-9 and EW-10, which were completed in the First Zone ,
<br /> iaquifer(Appendix A, Table 8), due to a pump malfunction, well EW-8 was substituted for
<br /> EW-9 between 08 August and 25 September 2002 A total volume of approximately
<br /> 16,627,886 gallons of MTBE-impacted water has been treated at the site since the start-up
<br /> i period in November 2000 (Table 8)
<br /> ,
<br /> • Dissolved MTBE was detected from grab samples collected at the influent-end of the
<br /> i treatment system at concentrations between 13,µg/1 and 21 µg/1, laboratory analysis of grab
<br /> water samples collected at the effluent-end of the pump and treat system did not detect any
<br /> petroleum constituents of concern (Table 1) y
<br /> i • Between 05 September 2002 and 21 November 2002, the mass of MTBE-impacted ground
<br /> water processed during operation of the pump and treat system was calculated to be
<br /> Advanced GeoEnvironmental,Inc
<br />
|