The disposal of inert waste generated by the construction industry in depleted quarries is regulated under Legal Notice 22 of 2009 and 184 of 2011 as amended. Prior to this legislation, Legal Notice 128 of 1997 permitted a number of quarries for backfilling operations, whereby clean inert waste is recycled and/or backfilled.
In 2009 all the licences issued through this legal notice were revoked and quarry owners still interested in pursuing this activity submitted an application for an environmental permit under Legal Notice as before for inert backfilling or to recycle inert waste.

The quarries that were licensed through Legal Notice 128 of 1997 and that have a pending environment application with the Authority are considered as sites authorised to accept inert material until a full environment permit is issued.
The waste that is authorised to enter at these sites is solely restricted to the following:
| Waste Type | Description of Waste |
| Excavation Waste | Waste that originates from rock excavation. This waste should be free of soil, trees, shrubs or any other agricultural content |
| Demolition Waste | Waste that originates from the demolition of structures. This waste is to consist of stone slabs and concrete planks or concrete beams only and should not contain any other waste type such as aluminium, wood or iron apertures, pieces of clothing, furniture, household goods, mattresses or any other waste. |
The following is a list of all the permitted sites that are authorised to accept clean inert waste*:
Malta
Applicant | Location | Permitted under: |
Mr. Julian Vella | Quarry HM31, Ta' Dmejrek, l/o Dingli | Legal Notice 128 of 1997 |
Mr. Paul Vella | Quarry HM15, Wied Filep, l/o Naxxar | Legal Notice 128 of 1997 |
Mr. Paul Polidano | Quarry HM33, Għar Lapsi Road, l/o Siġġiewi | Legal Notice 128 of 1997 |
Mr. Paul Xuereb | Quarry HM29, Torri Falka, l/o Żebbiegħ | Environmental Permit (EP 0041/09) |
Mr. Mario Bonnici | Quarry HM35, Ta Żuta, l/o Dingli | Legal Notice 128 of 1997 |
Mr. Mark Aquilina | Quarry HM03, Wied Inċita, l/o Attard | Legal Notice 128 of 1997 |
Mr. Mark Aquilina | Quarry HM12, Wied Inċita, l/o Attard | Legal Notice 128 of 1997 |
Mr. Joseph Vella | Quarry HM21, Labour Avenue, l/o Naxxar | Environmental Permit (EP 0029/09) |
Mr. Joseph Vella | Quarry HM09C, Ta' Kaduma, l/o Mosta | Environmental Permit (EP 0003/09) |
Mr. Jimmy Gatt | Quarry HM28, Triq Birguma, l/o Naxxar | Environmental Permit (WM 0007/05) |
Mr. Paul Falzon | Quarry HM32, Triq Santa Katarina, l/o Rabat | Legal Notice 128 of 1997 |
Mr. Paul Xuereb | Quarry HM29, Torri Falka, l/o Żebbiegħ | Environmental Permit (EP 0041/09) |
Mr. Lawrence Saliba | Quarry HM08, Wied iz-Ziju, l/o Żejtun | Environmental Permit (EP 0014/11) |
Gozo
Applicant | Location | Permitted under: |
Mr. Teddy & Carmel Grima | Quarry SG03, Ta' Xrejjaħ, l/o San Lawrenz | Environmental Permit (WM 0023/08) |
* It is recommended to contact the management of these sites for opening hours and acceptance procedures that may apply to specific sites.