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A <br /> Lancaster <br /> I <br /> Laboratories <br /> { <br /> September 28, 2005" <br /> Ms. Deanna Harding <br /> Gettler-Ryan Inc. <br /> Suite J - <br /> 6747 Sierra Court , <br /> Dublin, CA 94568 <br /> Subject: Trip Blank Contamination <br /> LLI Sample Number: 4596162 <br /> Facility Number: 91452 <br /> City, State: Ripon, CA <br /> Dear Ms. Harding: <br /> Between July 15, 2005 and September 15, 2005, we experienced low-level toluene and total xylene. <br /> hits in trip blanks submitted with your samples. The contamination range was 0.5—2.7 Ng&for each <br /> analyte. All of these hits were just above the Method Detection Limit(MDL) and well below the Level <br /> of Quantitation (LOQ). ; <br /> Lancaster Laboratories performed an investigation to determine the cause of the low-level <br /> contamination in the.trip blank; however,we were unable to identify the cause. The investigation <br /> _ included discussions with our bottles vendor and a review of the analytical lot check that was <br /> performed on the hydrochloric acid used to preserve the bottles. The laboratory storage blanks that: <br /> were analyzed during the same time frame did not show a trend in toluene hits. <br /> Based on this investigation, the following corrective action plan has been put into place to prevent a <br /> reoccurrence: <br /> Each shipment of 40-mL vials that is received at the laboratory will be tested for volatile l <br /> contamination prior to trip blank preparation. If there are multiple lots in a shipment, a ,li <br /> bottle should be taken from each lot. This additional testing will help to eliminate the �l <br /> possibility of the laboratory preparing trip blanks in contaminated bottles. " <br /> The volaflle laboratories have been instructed to investigate any evidence of <br /> contamination in trip blank samples prior to releasing analytical reports. <br /> corrective action Ian lease contact me at <br /> If you questions or concerns about thise plan, p <br /> Y <br /> 717-656-2300 Ext. 1812. <br /> Sincerely, b <br /> /�ti U tarn , <br /> Amy L. Doupe, B.S., <br /> Senior Specialist :a <br /> Quality Assurance <br /> i ALDlmcs ' <br /> } Enclosures 11 <br /> Lancaster Laboratories, Inc. - - <br /> i 2425 New 1-1011as;d Pike <br /> PO Box 12425 Shipping Address' <br /> f PA 17605 <br /> r <br /> Lancaste, -2425 Lancaster Laboratories,Inc. <br /> h MEMBER <br /> 4 717-656-2300 Fax:717-656-2681 2425 New Hdiand Pike <br />! www.lancasterlabs.com Lancaster,PA 17601 Environmental o Pharmaceuticals <br /> li <br />