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a (12/13/2011)Vmoo Jain RE: FW contact info _ Page 1 i From: Jimmy Youngblood <jyoungblood@gseworld.com> To: 'Vinoo Jain' <vkjain@waterboards.ca.gov> CC: Victor Izzo <vizzo@waterboards.ca.gov> Date: 12/8/2011 4:12 PM Subject: RE: FW: contact info Vinoo, I understand that you would not request test. GSE would pay for test if TRI can perform something similar. However, GSE still does not recommend GCL only landfill caps. GSE recommends a composite liner system. Please feel free to have anyone call me to discuss issues or any assistance that I can provide. -----Original Message----- From: Vinoo Jain [mailto:vkjain@waterboards.ca.gov] Sent: Thursday, December 08, 2011 5:19 PM To: Jimmy Youngblood Cc: Victor Izzo Subject: RE: FW: contact info Hello Jimmy, Actually we would not be the ones who would be requesting the testing. However, I will pass this information on to the County Rep who is responsible for the design. Can you see my problem here, based on a given GCL thickness you are saying one needs to achieve 4 x 10-8 cm/sec max hydraulic conductivity. Just using the material performance results from ASTM 4084 testing and then saying that the GCL exceeds 4 x 10-8 cm/sec by a factor of 10 (5 x10-9 cm/sec) does not work. For right now I have enough information to have a discussion with the county. If the county insists on only using a GCL cover and they propose using your product I will have them contact you to see about providing the necessary test data that we would need to approve the proposed cover as an equivalent alternative to CCL. My Regards, Vinoo >>> Jimmy Youngblood <jyoungblood @gseworld.com> 12/8/2011 3:03 PM >>> Vinoo, We can see if TRI can perform some testing that is similar or least a lower effective stress and hydraulic stress. My calculations show that you would need the gcl to have a hydraulic conductivity 4 x 10-8 cm/sec to be equivalent of 1 ft. compacted clay with a hydraulic conductivity of 1 x 10-6 cm/sec with a hydraulic head of 1 ft. -----Original Message----- From: Vinoo Jain [mailto:vkjain@waterboards.ca.gov] Sent: Thursday, December 08, 20114:53 PM To: Jimmy Youngblood Subject: RE: FW: contact info Hello Jimmy, Thank you for your comments. We have a landfill that is proposing the following: 1 ft foundation layer above refuse GCL (From the specs I believe it is Bentofix Thermal Lock NWL) 2 ft of cover soil.