Nicole Maccalla, a data scientist, said embers burned more than half of her roof, several windows and eaves were damaged, and her house in Altadena was left filled with ash, debris, soot and damaged appliances. She said her insurance adjuster said USAA would pay for contamination testing, but after choosing a company and coming back with the results, her claim was rejected. The adjuster said the company only covered testing in homes with major damage.