Laserfiche WebLink
S E C ® R <br /> approximately 20 minutes (in the sun), then the head-space within will be tested for total <br /> organic vapor, measured in parts per million as benzene (ppm; volume/volume). The <br /> instrument will be calibrated prior to drilling using a 100-ppm isobutylene standard (in air) <br /> and a sensitivity factor of 55, which relates the photo-ionization potential of benzene to that <br /> of isobutylene at 100 ppm. The results of the field testing will be noted on the boring logs. <br /> PID and FID readings are useful for indicating relative levels of contamination, but cannot be <br /> used to evaluate hydrocarbon levels with the confidence of laboratory analyses. <br /> Laboratory Procedures <br /> Soil and groundwater samples will be analyzed for TPHg, benzene, toluene, ethylbenzene, <br /> xylenes (BTEX compounds), and fuel oxygenates using EPA Method 8260 single run. <br /> Soil and groundwater samples will be sent under standard chain-of-custody procedures to a <br /> California State-certified laboratory. <br /> Soil Cuttings and Rinsate Water <br /> Soil cuttings and drilling mud generated during drilling operations will be temporarily stored <br /> onsite pending characterization and disposal. Soil cuttings and drilling mud will be removed <br /> by ConocoPhillips' disposal contractor to an appropriate disposal facility. Water generated <br /> during steam cleaning will be temporarily stored in DOT-approved 55-gallon drums pending <br /> transport by ConocoPhillips' disposal contractor to an appropriate disposal or treatment <br /> facility. Soil cuttings and rinsate water drums will be temporarily stored onsite for <br /> approximately 4 to 8 weeks. <br /> r <br /> 4 <br /> .�y4? <br /> Rt <br />