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i - --- ,. <br /> 1117 tone Palm AVenue, Suite B" - <br /> 4 Modesto, CA 95351 <br /> hftp I/www atcassociates com\/A <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> A S S O C I A T E 8 1 N C <br /> December 10, 2004 L� ll �� <br /> 1� y +D <br /> 54 62596 0001 DEC 2 0 2004 <br /> ENVI R ON IA E fell HEALTH <br /> EALTH <br /> Mr Richard Stiffier PERMIT/SCCi+,IiGES <br /> City of Stockton <br /> Department of Municipal Utilities <br /> 2500 Navy Drive <br /> Stockton, CA 95206-1191 <br /> Subject Groundwater Discharge at Farmer Property, 610 North Hunter Street, Stockton, <br /> California <br /> Dear Mr Stiffler <br /> ATC Associates Inc (ATC) is presenting certification provided by Cooper Controls and Electrical <br /> Services to document the semi-annual calibration of the lower explosive limit (LEL) meter and <br /> groundwater flow meter for the discharge system located at 610 North Hunter Street in Stockton, <br /> California (Figure 1) The Groundwater Discharge Permit (GDP) was approved by the City of Stockton <br /> Department of Municipal Utilities on November 6, 2002 On February 19, 2003, the City of Stockton <br /> Department of Municipal Utilities Issued an Amended Groundwater Discharge Permit Increasing the <br /> maximum groundwater discharge capacity from 1,000 to 2,000 gallons per day (gpd) <br /> i <br /> The calibration was performed on November 15, 2004, although the treatment system has not been <br /> operational due to mechanical difficulties since late October 2004, as stated in ATC's October 2004 Sed <br /> Monitoring Report foi Groundwater Discharge at Farme7 Property, 610 North Hunter Street, Stockton, <br /> California, dated November 15 2004 Copies of the calibration certifications are attached ATC will <br /> notify the City of Stockton prior to starting up the treatment system once repairs have been made <br /> If you require any additional information, please contact our officc at(209) 579-2221 <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> Drew Van Allen <br /> Senior Project Manager <br /> v <br /> Jeanne Homsey, P E <br /> CA Registered Civil Engineer No 47410 <br /> • cc Mr and Mrs Raymond Farmer <br /> Mr Jeff Wong, SJCEHD <br /> s\62 SWreponslwaterdischaree110_04 doc I <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />