About Us Larry Siddall, President of AZCA Drilling & Pump, has come a long way from his humble beginnings in a small office in Ehrenberg, AZ. Through hard work, dedication, and integrity, AZCA Drilling & Pump has quickly become the leading water well contractor for the Arizona/California region. Over 20 years later, AZCA’s commitment to its customers remains: to deliver high quality, superior service, done right -the first time.