Scoazze means rubbish. Scoazzer is a rubbish collector, and scoazzera a rubbish dump — see Differentiated rubbish collection in Venice.
“Veduta del Campo de’ Giesuiti” from the “Gran Teatro di Venezia”, published by Domenico Lovisa, c. 1717.
“Scoazer” (rubbish collector) from “Arti che vanno per via” (1785) by Getano Zompini, translated by René Seindal.
Venice had an organised system of differentiated garbage collections from the 1400s, to keep the city clean and the canals open.