Sandy was born in Anson, Texas to Rosendo and Antonia Alvarez. She was married to Angel Mendoza of Amarillo. Sandy loved her family very much.
She was preceded in death by her brother Eddie Alvarez and her father Rosendo Alvarez.
She is survived by her husband, Angel Mendoza; three daughters, Julia Hernandez, Blanca Hernandez Varela, and Amalia Mendoza; two sons, Wyatt Santacruz and Fabian Mendoza; one sister, Sylvia Alvarez; her mother, Antonia Alvarez and four grandchildren, all of Amarillo.