Laserfiche WebLink
� <br /> . ' <br /> � <br /> August 1, 1988 <br /> Mr. David Carls <br /> San Joaquin County <br /> Local Health District <br /> Stockton, CA <br /> RE: Preliminary investigation, ETS project number: 302 <br /> �� ��«� �,_* �� °� �� ^ <br /> `" ^ ` �+ ��/^��/ .� ^ ~_ <br /> Dear Mr. Carls, <br /> In response to our phone conversations regarding the <br /> workplan prepared for the site mentioned above, I have <br /> prepared this letter and attachments to clarify the various <br /> aspects of the report that concerned you. <br /> As mentioned in Section 1. 1 Purpose of the workplan, <br /> this site investigation is preliminary only and is meant to <br /> determine the presence or absence of contamination on the <br /> site. A full-scale site investigation will be undertaken <br /> should circumstances warrant such an effort. <br /> The site map has been updated to show sewer line/septic <br /> system locations. This information was provided to ETS by <br /> Mr. Jerry Moore. No soil borings or wells will be drilled <br /> at this time within the fifty foot perimeter stipulated by <br /> yourself. <br /> Soil samples will be collected at five foot intervals. <br /> Obvious contamination as evidenced by odor and sight will <br /> mandate that the sample be run as a distinct sample. Where <br /> there is doubt, the sample will be run as a distinct sample. <br /> However, should it be apparent that no contamination is <br /> present in two or more sequential samples, they will be run <br /> as a single oomposited sample. The exception to this is the <br /> bottom hole sample which will be run separately in all <br /> instances. <br /> Soil samples will be analyzed for gasoline by GC/FID <br /> using EPA extraction method 5030, for TPH (diesel ) using <br /> sonification extraction, and for TEL. BTX and E will also be <br /> reported. Should contamination be encountered in an area <br /> believed to be the site of a waste oil tank, a PCB scan will FZ70 <br /> be run. This determination will be made in the field by ^� <br /> visual inspection and odor emission when appropriate. <br /> Groundwater samples will be analyzed using EPA method 60� /.� `-�^� <br /> ��/// ^° <br /> ^= <br /> �� <br /> �' � <br /> � <br /> ^_ <br /> Wells that are completed in areas of obvious ^�� <br /> ^w�w <br /> contamination will be developed using an air-lift system <br /> until the water runs clear. The well development water will <br /> be containerized and left on-site for later treatment and/or <br />