|
r 1117 Lone Palm Avenue, Suite 6
<br /> Modesto, CA 95351
<br /> %TIL www atc-enviro corn
<br /> 2095792221
<br /> Fax 209 579 2225
<br /> A S S O C I A T E S I N C
<br /> January 27, 2003
<br /> 54 62596 0001 Iw
<br /> r
<br /> a,y r f
<br /> Mr Richard Stiffler �
<br /> City of Stockton
<br /> Department of Municipal Utilities CP
<br /> 2500 Navy Drive
<br /> Stockton, CA 95206-1191
<br /> Subject December 2002 Self-Monitoring Report for Groundwater Discharge at Farmer
<br /> Property, 610 North Hunter Street, Stockton, California
<br /> Dear Mr Stiffler
<br /> ATC Associates Inc is presenting the December 2002 Self Monitoring Report for the discharge
<br /> system located at 610 North Hunter Street in Stockton, California (Figure 1) The Groundwater
<br /> Discharge Permit (GDP) was approved by the City of Stockton Department of Municipal
<br /> Utilities on November 6, 2002
<br /> SELF-MONITORING ACTIVITIES
<br /> On December 20, 2002, ATC personnel started up the soil and groundwater remediation system
<br /> at the above referenced property The remediation system includes a thermal oxidizer to
<br /> remediate petroleum-impacted vapors and a carbon filtration system to remediate petroleum-
<br /> impacted groundwater extracted from the subsurface Groundwater is collected into a knockout
<br /> drum, treated, and then discharged
<br /> ATC personnel monitored the groundwater discharge system on December 20, December 23, and
<br /> December 27, 2002 In accordance with the City of Stockton Department of Municipal Utilities
<br /> GDP requirements, the flow, total flow, and Lower Explosive Limits (LEL for gasoline) were
<br /> continuously recorded Also in accordance with the GDP, on December 27, 2002, ATC collected
<br /> grab, well mixed, and representative samples of the final treated groundwater The groundwater
<br /> samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg) by EPA method
<br /> 8015, benzene, toluene, ethyl benzene, and xylenes (BTEX) by EPA method 8020, and methyl
<br /> tertiary butyl ether (MTBE), ethyl tertiary butyl ether (ETBE), tertiary butyl alcohol (TBA),
<br /> tertiary amyl ether (TAME), di-isopropyl ether (RIPE), 1,2-dichloroethane (1,2-DCA), and ethyl
<br /> dibromide (EDB) utilizing EPA method 8260
<br /> ATC inadvertently did not analyze the final treated groundwater for pH by EPA method 150 1,
<br /> j total petroleum hydrocarbons by EPA method 418 1, total cadmium, total chromium, total
<br /> copper, total lead, total nickel, and total zinc by EPA method 200 series, or total toxic organics
<br /> W lwordprol625961reportslwaterdlscharge112_02 doe I
<br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS
<br />
|