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Enron Mail |
We received preliminary sample results yesterday. Sample #1 (TPH = 97 mg/kg)
and Sample #2 (TPH = 121 mg/kg) were collected from the east wall of the excavation about 2 feet outside the NNG facility fence and about 4 feet below ground surface. Sample #3 (TPH = 22400 mg/kg) was collected from the east wall of the excavation about 8 feet outside the NNG facility fence and about 8-10 feet below ground surface. There was little visual evidence that this soil sample was affected, but apparently it is. In my discussions with Texaco's consultant, I inquired about their sample analysis plan. He indicated that they were submitting soil samples for TPH analysis by method 8015mod (GRO & DRO). I was concerned about comparing results from the 8015mod analysis to our older data generated by method 418.1. In light of this I submitted our samples for analysis by method 418.1. The 8015mod method is a more compound specific analysis than the 418.1 method and often the more appropriate method to use. However, in this case it may not be the most appropriate method. The 8015mod method is a GC method used to measure the mass of hydrocarbon compounds that will elute within specific time windows. The first time window is set up to measure the mass of gasoline range organics (GRO). The second time window is set up to measure the mass of diesel range organics (DRO). Any hydrocarbon compounds that elute after the DRO time window are not measured. This would not be an issue if the soil was contaminated with a light condensate, but Texaco's oil pit was reportedly used to accumulate liquids not suitable for feed stock to the plant. I think we can assume this meant heavy hydrocarbons. The 418.1 method is a less sophisticated method that measures petroleum hydrocarbon compounds over a wider range of carbon number, that is, it will measure the presence of heavier hydrocarbons that would not be measured using method 8015mod. In light of this, the 418.1 method is likely the more appropriate method for assessing soil affected by the Texaco oil pit, particularly when results are compared to older data generated using method 418.1. I have requested our lab to confirm the results for Sample #3 using method 418.1. In addition, I have asked that they run the sample using method 8015mod (GRO & DRO) so that we can compare the two results. We should have these results later next week. I would like to get this additional information and discuss it among ourselves before we respond to Texaco. Right now I am inclined to say that the Texaco oil pit is neither implicated or cleared as the culprit of contamination found in NNG's monitor well MW-3. From: George Robinson 02/15/2000 08:54 AM To: Bret Reich/ET&S/Enron@ENRON cc: Larry Campbell/ET&S/Enron@Enron, Louis Soldano/ET&S/Enron@ENRON Subject: Re: Eunice Gas Plant Bret: I collected three soil samples from the east wall of the excavation area. We should have results back from the lab later this week. Although the samples did not appear to be affected with petroleum hydrocarbons, I suggest we take a look at the results before initiating any further discussion with Texaco. George Bret Reich 02/14/2000 04:50 PM To: George Robinson/OTS/Enron@ENRON, Larry Campbell/ET&S/Enron@Enron cc: Louis Soldano Subject: Eunice Gas Plant fyi ---------------------- Forwarded by Bret Reich/ET&S/Enron on 02/14/2000 04:48 PM --------------------------- "Pope, D Bruce" <popedb@texaco.com< on 02/14/2000 03:21:23 PM To: "'Reich, Bret W.'" <breich@enron.com< cc: Subject: Eunice Gas Plant Bret--the work on the old Texaco pit is finished and I am told that neither Texaco , nor the NMOCD found evidence of migration to the Northern compressor site. Once you have had a chance to talk to your clients, and the Enron consultants who witnessed the work, give me a call and lets discuss the next step. I am not sure the settlement agreements we drafted are still relevant. As you can see , I am now in our Houston office. You can now contact me at the numbers shown below. The email address is unchanged. I will be in the office through Thursday, and out of town the following week. Let me know when you are ready to discuss this. D. Bruce Pope Senior Counsel Texaco Inc. Texnet 752-7883 (713) 752-7883 FAX (713) 752-4762 Email: Popedb@texaco.com PRIVILEGED & CONFIDENTIAL COMMUNICATION : Do not read, copy or disseminate this communication unless you are the intended addressee. This communication may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you are not the intended recipient, you are on notice that any unauthorized disclosure, copying, distribution, or taking of any action in reliance on the contents of the electronically transmitted materials is prohibited. If you have received this communication in error, please call us (collect) immediately at (713) 752-7883 and ask to speak to the sender of the communication. Also, please notify immediately via e-mail the sender that you have received the communication in error.
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