Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
Page 2 <br /> QUALITY ASSURANCE, U� CONTROL (continued) <br /> Field Tests <br /> The sample to be tested for volatile organics is placed in a <br /> Mason jar and sealed with a foil cap. The sample is allowed to <br /> volatize for 15 minutes, and then the probe of the photo-ionization <br /> meter is inserted through the foil. The gas in the head space of <br /> the jar is drawn off by the photo-ionization meter and the reading <br /> is recorded. The meter readings help the geologist determine such <br /> things as, where next to drill, if the drill crew should wear <br /> respirators, and which samples are to be tested by the analytical <br /> laboratory. <br /> Chain of Custody <br /> The samples to be tested by the analytical laboratory are <br /> documented with a Chain of Custody Form. The field geologist lists <br /> the samples on the form, the boring number, depth of sample, and <br /> time and date of sampling. This Chain of Custody Form remains with <br /> the samples and is signed and dated by each party accepting delivery <br /> of the samples. <br /> Laboratory Analysis <br /> The laboratory identified on the attached proposal is a State of <br /> California Approved Hazarglous Materials laboratory. Analysis is for <br /> benzene, toluene, xylene and total petroleum hydrocarbons. <br /> Additional analysis, such as total lead, would be performed as <br /> necessary. <br /> Report <br /> At the conclusion of the field work and laboratory <br /> investigation, the geologist prepares a. report presenting the <br /> findings, conclusions and reccomendations for the project. <br />