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FIRST QUARTER 2006 GROUNDWATER TREATMENT FACILITY MONITORING REPORT <br />FORWARD LANDFILL WDR ORDER NO. R5-2003-0080 <br />11 <br />A compact disc containing historical influent and effluent analytical, pH, and conductivity <br />data from August 1994 to December 2005 was provided in the Fourth Quarter 2005 <br />Groundwater Treatment Facility Monitoring Report (CH2M HILL, 2006). According to a <br />conversation with CVRWQCB staff, historical and 2006 analytical, pH, and conductivity <br />data will be provided on compact disc in the fourth quarter 2006 monitoring report <br />(Atkinson, 2006). <br />RDD/061100003 (NLH3129.DOC) 6 <br />acetone has never been detected in the GTF influent. No VOCs were detected in the effluent <br />sample collected on February 1, 2006. <br />Under WDR Order No. R5-2003-0080, influent sampling for pH, specific conductivity, <br />turbidity, and VOCs is performed semi-annually. Influent samples are collected from a <br />sample port in the header pipe adjacent to the air stripper. Semi-annual influent monitoring <br />was conducted on March 2, 2006. Table 3 presents the results of the influent monitoring <br />performed during first quarter 2006. Appendix A contains the influent monitoring field <br />sampling logs and laboratory results for first quarter 2006. <br />TABLE 3 <br />Influent Monitoring Results <br />Forward Landfill Groundwater Treatment Facility Monitoring Report, First Quarter 2006 <br />Analysis Date Parameters Units Results <br />Field Parametersa <br />3/2/06 pH pH units 6.6 <br />Conductivity µmhos/cm 1,040 <br />Turbidity NTU 2 <br />VOCs, <br />3/2/06` 1,1-Dichloroethane µg/L 1.2 <br />1,2-Dichloropropane µg/L 0.48 Jd <br />1,4 -Dichlorobenzene µg/L 0.25 Je <br />cis-1,2-DCE µg/l_ 5.2 <br />Dichlorodifluoromethane µg/L 0.93 <br />Tetrachloroethylene µg/L 15 <br />trans-1,2-DCE µg/L 0.56 <br />Trichloroethylene µg/L 8.7 <br />All Other VOCs µg/L ND <br />aAnalyzed using a calibrated Horiba U-10 water quality meter. <br />bAnalyzed using USEPA Method SW8260B. <br />`Only EW -1 was operational when this sample was collected. <br />dThe MDL and PQL for 1,2-dichloropropane are 0.17 and 0.5 µg/L, respectively. <br />eThe MDL and PQL for 1,4 -dichlorobenzene are 0.19 and 0.5 µg/L, respectively. <br />Notes: <br />DCE = dichloroethylene <br />NTU = nephelometric turbidity units <br />11 <br />A compact disc containing historical influent and effluent analytical, pH, and conductivity <br />data from August 1994 to December 2005 was provided in the Fourth Quarter 2005 <br />Groundwater Treatment Facility Monitoring Report (CH2M HILL, 2006). According to a <br />conversation with CVRWQCB staff, historical and 2006 analytical, pH, and conductivity <br />data will be provided on compact disc in the fourth quarter 2006 monitoring report <br />(Atkinson, 2006). <br />RDD/061100003 (NLH3129.DOC) 6 <br />