EDUARDO GILBERT DINOYO, RODELIO NENGASCA, AGAPITO ARCILLAS, LEONARDO F. CAMPOMAYOR, JR., EDUARDO MERAFUENTES, ROGELIO G. OYON-OYON, MARCELINO B. RAFOLS, EUNOLIE SABEJON, BENITO A. SEDANTES, TEOFILO BASALO, NOEL B. CALINADA, ROMEO B. DE LA CRUZ, EDUARDO REBUSTO, CESARIO DESOACEDO, BENEDICTO TALAID, ESMERALDO MONTEROLA, HERACLEO REQUINTO, DIONISIO SABAYTON, AGAPITO PUCOT, KENNETH DINOYO, BEN DOROY, WEDJOSEPH ESCUZAR, WILMAR ACABO, ALLAN TECSON, LEONILO LANOJAN, EFRYN OCHAVILLO, THE HEIRS OF THE LATE AVELINO DINOYO (REPRESENTED BY KENNETH DINOYO), PETITIONERS, VS. UNDALOC CONSTRUCTION COMPANY, INC., CIGIN CONSTRUCTION & DEVELOPMENT CORPORATION, SPOUSES CIRILO AND GINA UNDALOC, RESPONDENTS