This sample (ECE-1) comes from the Eastern Terrace found in a low terrace between floors 3a and 3b (possibly in construction fill between the two floors?)(Chapdelaine et al. 2009:194).
Chapdelaine, C., V. Pimentel and J. Gamboa 2009 Gallinazo Cultural Identity in the Lower Santa Valley: Ceramics, Architecture, Burial Patterns, and Sociopolitical Organization. In Gallinazo: An Early Cultural Tradition on the Peruvian North Coast, edited by J.-F. Millaire, pp. 181-206, Monograph No. 66. Cotsen Institute of Archaeology Press, UCLA, Los Angeles.