C&D Frequently Asked Questions

Why is it important that construction waste be recycled?
Many natural resources are saved by recycling C&D waste, which makes up 29% of trash going to the landfill in San Mateo County.

Do all the cities in San Mateo County have the same recycling requirements?
No. Please refer to the city info page for details on specific cities and call for the most current requirements. All cities that do have recycling policies require you to submit recycling and disposal receipts upon completion of the project.

Why am I asked what city my waste came from?
The State requires each city and county to reduce waste through recycling, composting or other diversion activities. To gather statistics by city, landfill and transfer station gatekeeprs ask where the waste is from.

What are inert materials?
Inert solids include asphalt, brick, concrete, dirt, fines, rock, sand, soil and stone.

What is a mixed C&D recycling facility?
At a mixed construction & demolition recycling facility, different recyclables are sorted from a load of mixed construction waste. If you plan to take your waste to a mixed C&D facility, you can put all C&D materials into one bin and be sure that the majority of it will be recycled. A load of mixed C&D can include cardboard, drywall, metal, untreated wood and yard trimmings and small amounts of inert material (large amounts of inerts should go into "rock boxes.") It should not include plastic, food waste or hazardous materials.

How do I make sure my receipts reflect recycling?
First, you must make sure that you are taking your load to a facility that can recycle the materials you have. When you are at the gate of any facility, be sure to tell them that you would like to recycle the material and you need a receipt that reflects that. The receipt will indicate that the material was either recycled or disposed of.

What does Ox Mountain accept for recycling?
Ox Mountain Landfill only accepts loads that consist of one of the following recyclable materials for recycling: asphalt, bricks, concrete, dirt, fines, rock, sand, soil, stone, metal, porcelain, cardboard, or untreated wood and yard waste. A load with all of the above mixed together will not be recycled because they do not sort materials. However, a load with mixed aggregates only (asphalt, brick, concrete, dirt, fines, rock, sand, soil and stone) or mixed green waste only (untreated wood and yard trimmings) will be accepted for recycling.

What if a debris box company handles all my waste?
To meet local recycling requirements, you will need to request that the debris box company take your waste to an approved recycling facility and provide you with appropriate receipts from those facilities.

What do I do about the waste generated by my subcontractors?
The general contractor is responsible for ensuring that the recycling requirements are met for all waste generated on site, including waste generated by the subcontractors.

What if my new construction project generates almost no waste?
All construction projects generate waste and you are expected to recycle it. The industry average for waste generated at new construction sites is six pounds per square foot.

What is ADC and why do some jurisdictions not allow it to be
counted as recycling?

ADC stands for alternative daily cover and is crushed aggregate that is used instead of dirt to cover the landfill on a daily basis. Most of these materials can be used for re-manufacturing into new products, soil amendments and other uses that are considered by some jurisdictions to be a better use of the product. Therefore, these jurisdictions do not count ADC as recycling. Please refer to the City C&D Ordinances page to see whether or not a city accepts ADC as recycling.