Laserfiche WebLink
1, <br /> �i <br /> S E C 0 R <br /> kAid <br /> Ms Vicki McCartney <br /> September 4, 2003 <br /> . Page 2 <br /> (1,2-DCA) and 1,2-dibromoethane (EDB) by EPA Method 826(�B DIPE, ETBE, ethanol, 1,2-DCA, <br /> and EDB were not detected in samples from any of the wells Field and laboratory procedures for <br /> sample collection are presented in Attachment 1 Field data sheets showing sampling protocol are <br /> presented in Attachment 2 A summary of laboratory data is listed below <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 11 Concentration in pg/L(Well ID) Concentration in ug/L(Well ID) <br /> Total Samples <br /> TPFIg 4 130(MW-1 R) 640(MW-9) <br /> Benzene 1 --- 1 4(MW-3) / <br /> Toluene 1 --- 1 2(MW-7) <br /> Ethylbenzene 1 --- 2 2(MW-3) <br /> Xylenes 3 0 81 (MW-7) 4 3(MW-9) <br /> MtBE 9 / 18(MW-5) 760(MW 3) <br /> TBA 5 590(MW-6) 75,000(VW 1) <br /> TAME 1 --- 6 9(MW-9) <br /> Definitions <br /> MDL=Method Detection Limit <br /> . vg/L=Micrograms per Liter <br /> According to the laboratory analytical report, the detection of 75,000 ppb TBA In well VW-1 Is based <br /> on a reanalysis of the sample past hold time, the initial result of 90,000 ppb was reported as <br /> analyzed within the recommended hold time, however It was an estimate beyond the calibration <br /> range of the instrument In addition, concentrations of TBA reported for wells MW-1 R (1,500 ppb) <br /> and MW-5 (1,600 ppb) exceeded the calibration curve of the instrument, though were within linear <br /> range The concentration of TPHg reported for well MW-1 R (360 ppb) did not resemble the pattern <br /> of the requested fuel, though the requested hydrocarbon fuel pattern was reportedly present within <br /> the sample Groundwater analytical data are Included in Tables 1 andand are shown on Figure 2 <br /> The certified laboratory analytical report and chain-of-custody documentation are also included in <br /> Attachment 2 411,11 US <br /> INTERIM REMEDIAL ACTIVITIES <br /> k <br /> Interim remediation by groundwater batch extraction began in August 2000 for the purpose of plume <br /> migration control Interim remedial activities conductedth ,�quarter included the periodic pumping of <br /> groundwater from MW-1R Groundwater was pumped Z*Ien times during the second quarter 2003 <br /> from the above-mentioned well using a vacuum truck, approximately 44,600 gallons of water were <br /> extracted Approximately 776,30 gallons of groundwater have been extracted since Interim <br /> remediation began in August 2000 Water was periodically hauled by Onyx Industrial Services, a <br /> certified hazardous waste hauler, tq ConocoPhillips' Refinery in Rodeo, California for disposal <br /> Groundwater removal data is included s Table 4 <br /> ,p `�r <br /> ���` .��.$� •fns `� <br /> 1 1ConocoPhillips\Tosco Marketing1111931QMR12QMR03 Final doc <br />