Tree Care SOP Example

Stump Grinding — Below Grade & Backfill

Mechanical stump grinding to 12 inches below grade, debris cleanup, and topsoil backfill for lawn restoration.

1. Utility locate & pre-grind surveyCall 811 minimum 3 business days before grinding if any stump is within 10 feet of underground utilities — this includes landscape lighting, irrigation, gas, electric, telephone, and cable. Even with an 811 clearance, probe the soil around the stump perimeter with a metal rod before grinding to identify any lines not in the 811 database (particularly irrigation and low-voltage landscape lines). Mark any located utilities with the appropriate color flag before positioning the grinder. Remove rocks, wire, concrete, or other foreign objects from the stump surface and within 12" of the stump base — these become dangerous projectiles.
2. Position grinder & set work zonePosition the stump grinder so the cutting wheel is aligned to the near edge of the stump. Set up plywood shields or fabric debris shields on the side of the stump facing the house, parked cars, or any glass surface — grinding debris travels 50 feet or more. Confirm no bystanders are within the debris zone. Wear full PPE: hard hat with face shield (not safety glasses alone), hearing protection, and cut-resistant gloves. Check the grinder cutter teeth for wear — dull teeth produce heat, slow the job, and increase vibration. Replace any missing or cracked teeth before starting.
3. Surface pass — reduce stump to gradeBegin grinding with side-to-side passes across the stump face, working from the near edge progressively away from the operator. Make overlapping passes approximately 2" apart. Take manageable bites — do not plunge the cutting wheel deeper than 3" per pass on a hardwood stump. The cutting wheel should always be moving side-to-side while engaging the wood — never plunge straight down and hold position. After the first pass reduces the stump to grade, stop and clear grindings from the hole with a spade or the grinder's sweep before proceeding deeper.
4. Below-grade passes to 12 inches depthContinue making progressive depth passes until the grinding depth reaches 12" below the original grade — measure with a tape or a marked depth rod at multiple points across the hole. For a 28" diameter oak, the taproot system will extend well below grade — continue grinding any root material encountered within the footprint of the hole. Major lateral surface roots that are visible should also be ground back to a minimum of 24" from the stump center to prevent resprouting. Check depth at the edges of the hole, not just the center, as the outer edges are the most likely to be missed.
5. Debris management & hole preparationRake the grindings into a pile adjacent to the hole. Remove grindings from the site or spread and mix them with the removed topsoil for use as backfill filler — do not use pure wood chip grindings as backfill alone, as they decompose and cause settling. Dig out any large root sections that were exposed during grinding and cut them flush with a reciprocating saw. Inspect the hole bottom for any remaining root mass that could cause a depression after settling. Break up any compacted soil at the hole bottom with a spade to improve drainage.
6. Backfill, grade & lawn restorationFill the hole with a 50/50 mix of grindings and quality topsoil (or straight topsoil if grindings are being hauled off) in 4" lifts, tamping each lift with a hand tamper. Overfill the hole by 2" above surrounding grade to account for settling over the first growing season. If the customer requested seeding: rake the surface smooth, apply starter fertilizer per package rate, broadcast seed at label rate for the grass species, and topdress lightly with straw. If sod is specified: firm the final grade to 1" below surrounding grade to accommodate sod thickness. Photograph the completed restoration and note the recommended follow-up grade check timing (typically 4–6 weeks).