Routing issues causing disconnects, latency spikes

About 40-50 times per day, for 2 minute increments, the Internet becomes unusable, or stalls, at our office. We just signed up for Business Class Internet, which I was under the impression was supposed to guarantee against this kind of stuff. As it stands now, this is much worse than my home connection, which has even lower bandwidth caps.

Here's a log from a traceroute when it was happening:

traceroute to google.com (74.125.228.34), 64 hops max, 52 byte packets

1 10.1.10.1 (10.1.10.1) 9.109 ms 11.920 ms 16.745 ms
2 c-68-33-28-1.hsd1.md.comcast.net (68.33.28.1) 199.949 ms 427.734 ms 170.013 ms
3 xe-11-1-0-32767-sur01.kirkave.md.bad.comcast.net (68.85.112.33) 2361.397 ms 1176.813 ms 195.435 ms
4 * ae-25-0-ar04.whitemarsh.md.bad.comcast.net (68.85.114.249) 226.714 ms 164.664 ms
5 pos-3-1-0-0-cr01.newyork.ny.ibone.comcast.net (68.86.90.77) 39.822 ms
pos-3-5-0-0-cr01.newyork.ny.ibone.comcast.net (68.86.91.181) 26.102 ms
68.86.94.177 (68.86.94.177) 27.064 ms
6 pos-1-0-0-0-pe01.111eighthave.ny.ibone.comcast.net (68.86.86.42) 31.074 ms 88.452 ms 22.215 ms
7 66.208.228.206 (66.208.228.206) 343.932 ms 949.695 ms 898.545 ms
8 209.85.248.180 (209.85.248.180) 821.115 ms
209.85.248.178 (209.85.248.178) 19.970 ms
209.85.248.180 (209.85.248.180) 25.030 ms
9 209.85.251.37 (209.85.251.37) 23.303 ms 23.184 ms 29.125 ms
10 72.14.239.93 (72.14.239.93) 36.321 ms 30.424 ms 926.079 ms
11 72.14.236.147 (72.14.236.147) 66.063 ms 22.817 ms 23.548 ms
12 72.14.238.175 (72.14.238.175) 22.566 ms 97.378 ms 31.720 ms
13 iad23s06-in-f2.1e100.net (74.125.228.34) 38.342 ms 155.194 ms 33.737 ms