|
15 July 2002
<br />AGE -NC Protect No 96-0232
<br />Page 4 of 21
<br />• Total dissolved solids by EPA Method 160 1 (quarterly sampling frequency), and
<br />• Turbidity by EPA Method 180 1
<br />2 4 INFLUENT MONITORING RESULTS
<br />In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br />monthly ground water pump -and -treat influent sampling was performed for TPH-g, TPH-d, BTEX,
<br />MTBE, methanol, ethanol, DIPE, TAME, ETBE, TBA, 1,2 -DCA and EDB on 16 April, 22 May and
<br />13 June 2002, in addition, TPH-mo was analyzed during the April and June 2002 sampling events
<br />Influent water samples collected on the above dates detected MTBE (by EPA Method 8260) at
<br />concentrations of 33 kig1l, 28 µg/1 and 19 �Lg/I, respectively (Table 1) The laboratory analysis did
<br />not detect any other constituents of concern Analytical results of pump -and -treat influent -water
<br />samples are summarized in Table 1, laboratory reports are in Appendix B
<br />0 2 5 EFFLUENT MONITORING RESULTS
<br />In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br />monthly ground water pump -and -treat effluent monitoring was performed for flow rate, specific
<br />conductivity (EC), pH, temperature, total dissolved solids (TDS), total lead, TPH-g, TPH-d, BTEX,
<br />MTBE, methanol, ethanol, DIPE, TAME, ETBE, TBA, 1,2 -DCA, EDB and nitrate on 16 April, 22
<br />May and 13 June 2002, in addition, TPH-mo was analyzed during the April and June 2002 sampling
<br />events Total lead was analyzed on June 13 and a bioassay analysis was performed on 17 June 2002
<br />Laboratory analysis of pump -and -treat effluent grab water samples collected on 16 April, 22 May
<br />and 13 June 2002 did not detect any petroleum constituents of concern, Iutrate as NO3 was detected
<br />at concentrations of 46 milligrams per liter (mg/1), 47 mg/1 and 44 mg/l, respectively, TDS values
<br />were reported at 590 mg/l, 603 mg/1 and 610 mg/l, respectively Analytical results are summarized
<br />in Tables 1 and 2, laboratory reports are in Appendices C
<br />A bioassay laboratory analysis was performed on the grab sample collected from the effluent stream
<br />on 17 June 2002 The analysis utilized sample factors of 0 milliliter (ml), 125 ml, 500 ml, 1,000 ml,
<br />1,500 ml and 2,000 ml Each sample factor was tested with 20 Fathead minnow fish and a dilution
<br />volume of 2,000 ml of di -ionized water, pH, dissolved oxygen (DO) and temperature parameters
<br />were monitored and fish mortalities were counted over 96 hours The bioassay analysis generally
<br />reported a steady increase in pH in each sample factor over the 96 hour period, the analysis generally
<br />reported increasing pH and DO values with increasing sample factors Temperature measurements
<br />Advanced GeoEnvironmental, Inc
<br />
|