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TufTile, Inc.
                                                                                               Job No. 15339
               Gaynes Labs, Incorporated

                                                                                                June 10, 2015
               TufTile Inc.

               1200 Flex Court
               Lake Zurich, IL. 60047

               Attention:      Mr. Ted Meyers

               Regarding:      Impact Testing of Cast Iron Tiles
                               Our Job No. 15339

                               Your P.O. # 14419

               Dear Mr. Meyers,

               Please find below the procedures and results of the test that was conducted on Cast Iron
               Detectable submitted and identified by TufTile Inc.

               TEST PRROCEDURE:

               Testing was conducted in accordance with NCHRP Procedure T4-33.

               A 25.4 mm (1 in.) diameter hemispherical tup made from hardened steel was attached to the steel
               cylinder with the total weight of 20 lbs. (see Photo No. 1).  The panel under test was placed on
               the flat, leveled concrete floor and positioned with one of the domes centered under the impactor
               tup (see Photos No. 2 and 3).  The impactor was allowed to vertically impact the tops of the
               domes of the panels with energies of 27 J and 54 J (20 and 40 ft- lbs).  Three (3) impacts were
               conducted at each energy level at ambient temperature and three (3) impacts were conducted at
               each energy level at a temperature of -4° C.  Each impact was conducted on a separate dome not
               previously impacted.

               The impacted domes were evaluated in accordance with the criteria in Table 1 of NCHRP
               Procedure T4-33.

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