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i feet were recorded at 58.5 and 63.5 feet depth respectively in boring B-3. These ' weight-of-rod conditions were recorded in sediments located above the upper ; limestone surface, and are consistent with raveling conditions. Raveling is the ; vertical or lateral migration of sediments to deeper locations within limestone. It ' is a mechanism for sinkhole formation. Raveling is also an indication that the � paleosink is likely in a state of reactivation. Complete loss of drilling fluid circulation was experienced in four of the five SPT borings. � i Based on the results of this investigation, Geohazards, Inc. is of the opinion i that evidence of sinkhole activity (reactivation of paleosink environment, low N- � value in limestone, partially in-filled cavity, raveling associated with weight-of- rod conditions, losses of drilling fluid circulation) was detected at the Caselnova � t t' se of distress � property and that smkhole activity is identified as a con nbu ing cau , at the site. The observed distress can also be attributed to differential movements j associated with the hydraulic loosening and recompaction of near-surface sandy ' soils, and to natural aging of the structure, including material expansion and shrinkage. i i � I � s I � II t k FI 1 ! � � I . i I rl I 18 � ; ;