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Zanker Road Landfill – Site 1

Zanker Road Landfill SignThe Zanker Facilities in San Jose originally began as Zanker Road Landfill. It quickly developed into a major full service, resource management, composting/recycling facility and landfill for residents and commercial businesses. This facility is divided into operational areas handling specific types of waste materials. These areas include: Demolition Debris Recycling, Asphalt Shingle Processing, Concrete Recycling and Wood Waste/Brush Recycling. The facility is also home to the Zanker Landscape Materials yard which sells all our landscape and construction products, as well as other landscape supplies.

Demolition Debris Processing – Site 1

In 1988, Zanker Recycling has been a leader in processing mixed loads of demolition debris with a unique “float tank” and screening system that separates the soil, mixed concrete, and wood components from the mixed debris.

In 1998 we designed and constructed a complete Demolition Debris Recycling Facility that was able to process unsorted demolition debris materials at the rate of 70 tons per hour with an average of 90% diversion rate.

In 2015, Zanker designed and constructed a new demolition recycling operation that is currently processing over 80 tons per hour with an average 95% of diversion rate.

This facility consists of a patented combination of conveyors, screens, magnets and air separation equipment that separates the materials into manageable and marketable products.

These products are than directed to other recycling operations on site or shipped directly to end product users.

Concrete Recycling – Site 1

Zanker Recycling’s concrete plant was one of the first in the nation to convert concrete debris into aggregate products suitable for foundations and road construction.

The concrete recycling process begins with incoming clean concrete and reinforced concrete. Once the materials are unloaded at the site, non-acceptable materials are hand sorted out and recycled or disposed. Cleaned concrete is then loaded into the primary crusher where it is crushed. After the primary crusher, the material passes under a belt magnet where steel is removed before moving to a secondary crusher that further reduces the particle size. The material is then screened to remove oversized pieces which are re-circulated back through the crushing circuit. During the entire process, employees and machinery remove non-aggregate materials that would compromise the products value.

Products produced from the recycled concrete includes a 3/4″ class II base rock, utility sand, 3/8″ pea gravel and 3/4″ drain rock. These materials are sold to contractors and the general public and are available for delivery. To view these materials as well as all the other products carried by Zanker, please go to

Wood Waste and Brush Recycling – Site 1

Woodwaste and Mulch PilesLandscape contractors, demolition/construction contractors, and private individuals deliver wood waste and brush to Zanker Recycling. Incoming loads composed primarily of brush; tree trimmings and wood waste are directed to the wood waste stockpile area for unloading. Wood wastes separated out at the other on-site recycling plants (especially the Construction waste sorting line) are also regularly transferred to the incoming wood waste stockpile.

The wood waste is ultimately ground and then screened to create wood chips and wood fines.

The Wood Waste plant consists of an electric Peterson Pacific grinder, an electrically powered trommel screen and a series of electrically powered feed, transfer and stacking conveyors.

The wood chips (anything larger than 3/8-inch) are temporarily stockpiled on site and then hauled off-site and used primarily as co-generation fuel and secondarily as mulch for various landscaping and agricultural purposes. The wood fines (anything smaller than 3/8-inch) are also temporarily stockpiled on site and then hauled off-site and used in landscaping projects or as soil amendment.

To view these materials as well as all the other products carried by Zanker, please go to

Asphalt Shingle Processing – Site 1

Asphalt PadZanker Recycling accepts and processes clean, separated loads of composite asphalt roofing shingles removed from residential homes. The company sorts and cleans the old shingles and transports them to Oakland where they are processed into dry, granular asphalt pieces known as “RAS” (recycled asphalt shingles) that is shipped to other East Bay manufacturers to make “hot mix asphalt” used to build roads throughout the region.

The plant also accepts commercial tear off and tar and gravel roofing. These materials are stockpiles and made into alternative daily cover (ADC).

Zanker Materials Processing Facility – Site 2

C&D SortIn 1999, the Zanker Material Processing Facility, ZMPF, began recycling operations. The facility is divided into several different processing areas, each capable of processing different types of waste streams.

These areas include: Sheetrock Processing Area, Soils processing area and Mixed Construction Wastes Recycling.

Mixed C&D Debris Recycling Area – Site 2

Zanker Recycling also processes an extensive amount of mixed debris and debris box’s daily through a 240-foot long C&D sorting conveyor system. The system is utilized to remove a variety of materials; up to 16 products from the typical mixed waste stream.

The sorting conveyor system, which includes elevated work-stations, Nihot air separation units, disc-screens and magnets is located above large concrete storage bunkers that hold recovered materials. When the storage bunkers become full, the materials are routed for additional on-site processing, or loaded and hauled to approved recyclers. Other materials such as mattresses, are processed separately into different products. Residual materials are routed to a landfill for disposal.

C&D Panorama

The sorting system is capable of sorting 60 tons per hour with an average 80% diversion rate. The diversion rate and tons per hour vary depending upon the type of materials sorted.

Sheetrock Recycling – Site 2

Sheet Rock AreaContractors and private individuals deliver sheetrock to the Zanker typically with most of the loads being clean materials. Incoming loads composed primarily of sheetrock are directed to the sheetrock stockpile area for unloading. Sheetrock that is separated out at the other on-site recycling plants is also regularly transferred to the drywall stockpile.

In the recycling process, materials such as wood, metals, and trash are removed on-site leaving the sheetrock in smaller piles. These piles are consolidated in a stockpile where a Caterpillar dozer is used to crush the materials.

DM Reduction System – Site 2

The DM Reduction system processes materials categorized as miscellaneous debris, as well as residuals from Zanker’s other operations, including bulky items such as furniture, which are collected from local garbage collection companies.

The SSI Shredder can process up to 90 tons per hour and can ground to less than 14″ in size. The shredded materials are conveyed under a 60″ self-cleaning magnet to remove ferrous metals with the remaining shredded materials, dropping into a Doppstadt Trommel screen.

The fines are conveyed to a General Kinematics Air Classifier. Here, materials are fluidized with a high-velocity air stream which removes heavy items such as glass, metals, wood, and stones to be removed from lighter items such as paper, plastic and insulations. The heavy items are marketed as ADC, and the lighter items are shipped to a landfill for disposal.

The remaining materials cascade to a conveyor, where sorters remove items such as wood, metals (including tin, aluminum, and copper), concrete, brick and sheetrock. Sorters also remove beverage containers, mixed plastics, and cardboard. Residuals from the sort line are transported to the Marina Landfill in Monterey County.