Parratt Wolff Inc

The availability of multiple types of direct-push capable rigs allows us to utilize the right type of rig for your project. Whether you are inside or outside, on pavement or off-road.

Combination rigs give Parratt-Wolff the flexibility to drill with several different methods, all in one mobilization, without delays and under one contract. For example, once a free product plume is delineated with direct-push methods, large diameter recovery wells can be immediately installed.

Our combination rigs have been used to advance 10-1/4" ID augers, drill a 12" diameter fluid rotary bore hole, advance an 8" diameter down hole hammer, and to core rock. They have also been used to advance a wide variety of direct push tooling.

Our eight truck-mounted combination rigs are fully tooled to complete direct-push sampling and rotary drilling on the same job in one mobilization. Rotary drilling techniques available include hollow stem auger, down-hole hammer drilling, drive and wash casing or fluid rotary methods.

The ATC rig gives Parratt-Wolff a third option when it comes to direct push sampling. This rig has been used to probe to 90’ and then drill a 6” diameter borehole 150 ‘ deep... all in the same day!

Our 4-wheel drive tractor-mounted rigs are small enough to fit in constricted areas. Their tight turning radius makes them the ideal rigs for indoor work where access is limited. Their 4-wheel drive abilities make them the perfect choice for rugged outdoor conditions when rotary drilling is not required.

Soil Sampling

Soil samples are typically collected with conventional 2" diameter split-spoons (with or without liners) that are driven with a directpush hammer in 2' increments. Should field conditions prevent us from using conventional split-spoons, Geoprobe's Large Bore or Macro-Core discrete interval soil samplers can be used to collect 2' long cores. Parratt-Wolff also has available a 2" diameter Geoprobe Macro-Core® sampler that can be used to collect 4' long soil cores. In the event direct-push methods fail, other drilling methods such as hollow stem augers, fluid rotary or down-hole hammers can be used to advance the bore hole.

Here Parratt-Wolff augered under a building foundation. Once below the foundation, direct-push methods were used to collect discrete soil samples.

Groundwater Sampling

Groundwater samples can be collected from either discrete intervals or from temporary wells. For discrete sampling, Parratt-Wolff uses either the HydroPunch II sampler or Geoprobe's Screen Point 15 discrete sampler. As an alternative, various diameter temporary wells, including Geoprobe's Mill Slotted Well Point can be installed. Parratt-Wolff can also install micro wells with a sand pack and seal. Groundwater samples are typically collected with a bailer, peristaltic or inertial lift pump.