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k I 1 { I <br /> 6 r ` <br /> 23 December 2003' F <br /> AGE-NC Project No 97-0333 <br /> ' Page 2 of 11 r <br /> I { <br /> VI 1 <br /> I ' I <br /> 'I 1 <br /> 1 � <br /> ' 2.0 GROUND WATER PUMP AND TREAT REMEDIATION'SYSTEM <br /> Between 19 June 2003 and 10 September 2003 (third quarter 2003),4ground water pump-and-treat, fl <br /> interim remediation system was in continuous operation at the site The interim ground water pump-, <br /> and-treat system operation and maintenance procedures for the site were outlined in AGE's Interim <br /> Remediation Work Plan -June 2001, dated 21 June 2001 <br /> 1 <br /> 2 1 GROUND WATER PUMP AND TREAT OPERATION <br /> , I I <br /> 1 � � r rl <br /> During the third quarter 2003, extraction well EW-I was adjusted at the well-head to continuously, <br /> i extract ground water at a flow rate of approximately 4 GPM, extracted ground water was routed <br /> through a ground water treatment system consisting of granular activated carbon (GAC)"and <br /> ' Sunsolvet Following treatment,water was discharged underground via 2-inch diameter PVC piping <br /> f to the City of Mariteca sewer system, discharge piping is connected to a sewer manhole located <br /> ' {I approximately 25 feet south'of the pump-and-treat system <br /> M I <br /> Based on effluent flow meter readings (Table 5), approximately 218,888 gallons of treated water <br /> were extracted,and discharged to the City of Manteca sewer system between 19 June 2003 andl0 <br /> �I r it Septeinber2003 under City ofManteca Public Works Department(CMPWD)Industrial Wastewater j <br /> ' 1 li <br /> Discharge Permit No 02-1 <br /> ,r <br /> ' I I <br /> 122 GROUND WATER PUMP AND TREAT SAMPLING PROCEDURES <br /> Ground water pump-and-treat influent,intermediate and effluent water samples were collected from <br /> r valved ports located upstream (influent), after the second treatment media vessel (GAG-2) and` a , <br /> downstream (effluent)of the treatment6nit The grab water samples were collected utilizing 40-m1 <br /> EPA-approved volatile organic analysis (VOA) vials containing 015 ml 18%hydrochloric acid as a <br /> E ,'r samlple preservative and 1-liter amber bottles Care,was taken to ensure that visible air bubbles were <br /> not present in the vials after filling and capping Ground water sample containers were labeled with <br /> II I' i I I I I a sample designation;date, time, and sampler's initials <br /> , <br /> 4 <br /> t I <br /> '2 3 LABORATORY;ANALYSIS OF GROUND WATERPUMP-AND,TREAT SAMPLES ,'I <br /> 1LI <br /> Influent,intermediate(GAG-2) and effluent grab water samples were logged on a chain-of-custody '1} <br /> i form,,placed in a chilledlcontamer and transported)to a California Department of Health Serviccs <br /> k II (DHS)-certified laboratory far analysis for <br /> I� f <br /> � ' � 'lltl <br /> Advanced GeoEnvironmental,Inc <br /> if <br /> n II ! s <br /> I <br />