Out of curiosity, what's the partisan split on CA-46 on your map?
My guess would be about a D+1 district. The only really democratic areas are Gardena and a few parts of San Pedro and Long Beach. Lakewood is probably right around the national average. Torrance is lean Republican although Obama won it. And then it has some Republican territory on the Palos verdes peninsula.
Answered my own question: 58% Obama, so D+5 in 2008. It was easy to do a close approximation of the district with partisan data.
Also, Torie's completely right on the demographic info.