There are no tables that indicate minimum edge distances for holes in column base plates. When the holes are not subjected to a lateral force, even an edge distance that provides a clear dimension as small as 1/2" will normally suffice. Edge distances may be increased during the design stage in anticipation of field issues with anchor rod placements. This allows for some slotting or additional oversizing in the field if needed. Now, I can't possibly imagine why this is thought to be necessary, because we all know that anchor rods are always set exactly where they're supposed be.
Seriously, edge distance criteria is really dependent on what type of force the anchor rods are designed to transfer. Have you looked at the design drawings? They may show a specific edge distance. Detailers sometimes fail to correctly transfer design criteria to the shop drawings. If not, and you feel the edge distance on your shop drawing is insufficient, ask the EOR.
With a 1 13/16" hole diameter, your anchor rods should be 1" diameter. As you probably know, the requirements for anchor rods are much different, both in terms of loading and in terms of detailing, than those for structural bolts used in steel to steel connections. The AISC requirements for structural bolts, hole sizes, edge distances, spacing, etc. are stated in Section J of either the current AISC LRFD or ASD specifications, but these requirements do not apply to holes in base plates. Suggested hole sizes for anchor rods are listed in the AISC ASD Manual of Steel Construction, 9th edition, on pages 4-130 and 4-131. Also, the LRFD Manual of Steel Construction, 3rd edition, lists the hole size in Table 14-2 on page 14-27. Note that the later issued (LRFD) manual has larger sizes than the much earlier (ASD) manual. These hole sizes have been increased from the earlier ASD editions to provide a greater possibility for alignment with the actual performance of other trades in setting anchor rods. In many cases after erection, anchor rods are not relied on to transmit any force. Should the rods be required to resist tensile or shear forces in the design, the EOR must evaluate the resulting forces and stresses in both the steel and concrete elements of the foundation. This is where edge distances need close evaluation.
The Good Engineering Practice says that the minimum distance between the edge of the hole and the edge of the baseplate should be sufficient to accomodate the anchor bolt washer.
In other words, the tip of the washer should coincide, as a minimum, with the edge of the baseplate and not protrude over it.
What's the Good Engineering Practice? I've answered that question on the post "Weld discontinuity", by FSMalley, on the Certification section of this Forum, dated September 26, 2005.
Giovanni S. Crisi
Sao Paulo - Brazil