FINAL DELIVERY Longtime mail carrier is retiring After 36 years of bringing the mail to various Rossmoor neighborhoods (38 total years as a carrier), Maria Ruvalcaba will soon experience a deliverance of her own when she walks her final U.S. Postal Service route in mid-September. “I’m not sad – it really hasn’t hit me yet,” said Ruvalcaba, who looks younger than her 56 years