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NOTICES <br />Technical Information - By using any Technical Information contained herein, Recipient agrees that said Technical Information is given by CPChem for <br />convenience only, without any warranty or guarantee of any kind, and is accepted and used at your sole risk. Recipients are encouraged to verify independently <br />any such information to their reasonable satisfaction. As used in this paragraph, "Technical Information" includes a ny technical advice, recommendations, <br />testing, or analysis, including, without limitation, information as it may relate to the selection of a product for a specifi c use and application. <br /> <br />November 12, 2021 <br />Filename: Agru Oven and QUV Exposure for HP-OIT Testing_2021_111221.pdf <br /> <br /> <br />Nathan Ivy - Corporate Quality Control/Technical Manager <br />Agru America, Inc. <br />800 Rockmead #122 <br />Kingwood, TX 77339 <br />281-358-4741 <br /> <br />Dear Mr. Ivy: <br /> <br />Please recall your request for testing of oven-exposed and UV-exposed geomembrane samples produced <br />primarily from Marlex® 7104 LLDPE and Marlex® K307 MDPE. Agru blended other components with <br />each of these polyethylenes to produce the geomembrane samples for testing. Geomembrane samples <br />have been received from Agru, and test specimens were taken from the smooth areas of the samples. Test <br />results are reported on the following two pages. The samples were tested for HP-OIT in their as-received <br />condition and were also tested after oven and UV exposures of 90 days and 1600 hours of irradiance, <br />respectively, in accordance with GRI-GM13 and GRI-GM17 requirements. <br /> <br />The following geomembrane sheet samples were received from Agru in July 2021 and were reported to <br />be primarily composed of each of the Chevron Phillips Chemical Company grades in the description <br />below: <br /> <br />• Marlex® K307 Lot # PND821550, Agru Roll # GTC0078250016, black sheet, smooth, nominal <br />0.057” thick. <br /> <br />• Marlex® 7104 Lot # DNE810980, Agru Roll # GTA0077190117, black sheet, textured, nominal <br />0.055” thick. <br /> <br /> <br />The exposure and testing conditions along with the corresponding test results are tabulated on the next <br />two pages. GM-13 and GM-17 require a minimum % HP-OIT retention after a 90-day oven exposure and <br />after a 1600-hour UV irradiance exposure. These test results indicate the GM-13 and GM-17 minimum <br />% HP-OIT retentions were exceeded by the Agru-supplied K307 and 7104 sheet samples, respectively. <br /> <br /> <br />If you have any questions, please feel free to contact me (contact information given above). <br /> <br /> <br />Sincerely, <br /> <br />Vergil Rhodes <br />Polyethylene Technical Service and Applications Development, Geomembrane <br /> <br /> <br /> <br /> Vergil H. Rhodes, PE, CPlasT - Tech Svc & App Dev Engineer, Geomembranes <br /> Highways 60 & 123, Bartlesville Research and Technology Center, Room 103 PTC <br />Bartlesville, OK 74003 <br />◼539-529-4279 ◼rhodevh@cpchem.com ◼Fax: 918-977-7599 ◼ www.cpchem.com <br />