ARCHIVED REPORTS XR0012595 - Laserfiche WebLink

Home Browse Search

PIrA5F.I IiYDROGl3QLOGIC lNVESIIGATION WORK PIAN 4 9-1 West Durham Ferry Road,Tracy,California *Delta Project Na 40-91-732 w page a i -- 5.0 UALM ASSURANCE PLAN neral Sample Collection and Sandlin Procedures Proper collection and handling am.essential to ensure the quality of a sample Foch sample will be collected rrectly for the intended analyses,and stored prior to analysis for no in a suitable container,preserved co longer than the maximum allowable holding time 6.2 Sam le IdentilF. tion and Cltaln-oi Custal�ures "! Sample identification and chain-of-custody procedures ensure sample integrity and document sample i possession from tame of collection to its ultimate disposal. Each sample container submitted for analysis will have a label affixedto the containers to identify the job number,sampler,date and time of sample collection, A and a sample number unique to that sample. This information,in addition to a description of the sample, field measurements made,sampling methodology,names of on-site personnel,and any other pertinent field observations will be recorded on the borehole log or in the field records. All samples wilt be analyzed by {, a qualified laboratory. A chain-of-custody form will be used to record possession of the sample from time of collection to its arrival at The laboratory. When the samples are shipped,the person in custody of the samples will relinquish the f-custody form and noting the time of shipment. The sample co samples by signing the chain-ontrol officer will verify the sample integrity and confirm that it was collected in the proper container,preserved correctly, and that there is an adequate volume for analysis. 3 AnaloHcaI ounlity Assurance In addition to routine calibration of the analytical instruments with standards aad blanks, the analyst is required to run duplicates and spikes on 10 percent of the analyses to insure an added measure of precision and accuracy. Accuracy is also verified through the following: T: 1. EPA and state certifig%tion program. 2, participation in an interlaboratory or"round-robin'quality assurance program. -- -3— ----- ___verification-of-teAults-with-an-alternative-method.—For example, volatile organics may-ba3. -- — --- -- �. ction methods. determined through either purge and trap or liquid-liquid extra Il F