# How to Verify a New Home Site Is Ready Before Excavation

Source: https://brictale.com/build/construction/verify-new-home-site-readiness-before-excavation
Published: 2026-09-08
Audience: Homeowner
Published by Brictale, a consumer home-intelligence publication. https://brictale.com

## Short answer

Authorize excavation only after the permit holder confirms the current approved plans, setout, utility-locate record, erosion controls, safe access, named competent person, inspection path, and material/product timing. A homeowner may verify records and ask questions, but the permit holder, inspector, competent person, designer, and product manufacturer own site-specific approvals. If a gate is missing, mark the day conditional or stop and document the next handoff.

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# How to Verify a New Home Site Is Ready Before Excavation

Authorize the first excavation or foundation-mobilization day only after the permit holder confirms the current approved plans, survey setout, utility-locate record, erosion controls, safe access, named competent person, inspection path, and material/product timing. A homeowner may verify records and ask questions, but site-specific approval belongs to the permit holder, inspector, competent person, designer, stormwater lead, and product manufacturer. If a gate is missing, mark the day conditional or stop and document the next handoff.

This guide is for a United States single-family custom-home owner at the permit-issued, pre-foundation stage. It covers the decision conversation before an excavator arrives, not a remote sign-off. It uses Philadelphia, Pennsylvania and King County, Washington as clearly labeled examples of local rules. Your authority having jurisdiction (AHJ), permit type, state 811 center, approved plan revision, site conditions, and selected product manual control the actual sequence. It does not authorize unsafe do-it-yourself excavation, give structural-engineering instructions, promise inspection availability, or promise a completion date.

Use this page within the [build construction journey](/build/construction). Questions about parcel access and existing constraints belong with the [land journey](/build/land), product sequencing with the [materials journey](/build/materials), and responsibility or scope gaps with the [contractors journey](/build/contractors).

The question is narrower than “is the property ready to build?” The question is: “Do we have enough verified evidence to authorize this mobilization activity, and if not, exactly who obtains the missing evidence before the excavator or foundation crew proceeds?” Excavation can be a short activity on the calendar and still create a long chain of consequences. A wrong building corner, an incomplete locate, a missing erosion-control measure, or a waterproofing product that cannot be installed in the forecast conditions may force redesign, rework, a failed inspection, damage to a neighboring property, or an unsafe work stop.

The homeowner’s useful role is therefore governance. You can keep the record set, compare the current plan against the version in the permit file, ask the responsible people to name their assumptions, verify that an inspection request or conference is actually scheduled, and refuse to treat a verbal “we are good” as the record of a decision. You should not enter an excavation, direct an excavator, classify soil, approve shoring, decide that a utility mark is accurate, or substitute photographs for an inspection or engineering judgment.

## The decision is a documented mobilization gate, not a single yes or no

The safest homeowner decision is to authorize only the specific activity that has passed its gates. “Ready for excavation” should not silently mean “ready to pour footings,” “ready to waterproof,” or “ready to backfill.” Each activity has different inputs, people, evidence, and stop conditions. A site can be ready for survey staking and still not be ready for a machine. It can be ready for mass excavation and still not be ready for workers to enter a trench. It can be ready for a concrete crew and still not be ready to conceal the below-grade drainage assembly.

Use three statuses:

| Status | Meaning for the homeowner | What may happen next |
| --- | --- | --- |
| Verified | The required input is current, the responsible person is named, and the record or observation is retained. No known stop condition is open for that gate. | The permit holder may hand the activity to the next responsible person, subject to the AHJ and competent person. |
| Conditional | Work may be limited to a defined preparation step while a named person closes a defined gap. The condition has an owner, due date, and boundary. | Continue only within the written boundary. No one should treat conditional as authorization for the whole foundation sequence. |
| Stop | A required record is absent, a plan conflict is unresolved, a safety condition is unsafe, a required inspection or conference has not occurred, or conditions changed after verification. | Pause the affected activity. Record the reason, notify the permit holder, and obtain the next professional decision. |

The “verified” label is not a homeowner certification. It means you have verified that the responsible party has supplied a relevant record or has confirmed the site-specific action. For example, you can verify that a permit portal shows a plan revision and that the contractor has a copy on site. You cannot verify from a PDF that the excavation can be safely sloped; the competent person and, where required, the designer or registered professional engineer must make that determination.

This distinction matters because the first day has several different decision owners. The owner controls the owner-side authorization and the project record. The permit holder or general contractor controls construction execution and inspection requests under the contract and permit. The surveyor controls the survey work and setout record. The utility-locate requester and excavation contractor must coordinate the locate process under the applicable state and local rules. The competent person controls excavation-safety inspections and prompt corrective measures. The AHJ controls local inspection and permit enforcement. The civil engineer, geotechnical professional, or structural engineer controls their design judgments. The waterproofing manufacturer’s current technical documents control product-specific preparation, cure, protection, and backfill instructions.

The OSHA boundary is important. Under [29 CFR 1926.651](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651), the estimated location of underground installations must be determined before an excavation opens, and the exact location must be determined by safe means as excavation approaches it. OSHA also requires competent-person inspections for covered worker exposure before work and as needed during the shift, including after rainstorms or other hazard-increasing events. Those are worker-protection requirements, not a service the homeowner can perform by looking at a photograph. [OSHA’s trenching and excavation guidance](https://www.osha.gov/etools/construction/trenching) describes the competent person as someone with the knowledge and authority to identify hazards and take prompt corrective measures.

The first authorization should be written in a sentence that names the boundary. For example:

> “For [address], the owner authorizes the permit holder to mobilize equipment and perform the approved site-preparation and excavation work shown on plan revision [number], subject to the open conditions listed below. This is not authorization to pour concrete, enter an unprotected excavation, alter the approved design, disturb an unlocated utility, or conceal work before the AHJ’s required inspection.”

If the permit holder will not state what the authorization includes and excludes, the gate is not ready. The next decision is to resolve the ambiguity before equipment or subcontractors are committed.

### What counts as evidence

Useful evidence is contemporaneous and tied to the job. Keep the permit number, approved drawing revision, surveyor’s setout record, 811 ticket number and response status, private-utility investigation or exclusion note, erosion-control inspection or installation record, preconstruction-conference record where required, named competent person, inspection request confirmation, material delivery or booking record, product data sheet and lot or delivery record where relevant, and dated site photographs. A photograph can show what was visible at one time; it cannot prove that a hidden condition complied with a plan, that a trench remained safe after weather, or that an official inspection passed.

### What not to infer

Do not infer that a building permit includes every site, grading, right-of-way, stormwater, utility, septic, demolition, or environmental approval. Do not infer that public 811 marks identify every privately installed line. Do not infer that an approved plan eliminates the need for field verification. Do not infer that dry weather at 7 a.m. means the soil, excavation, access route, or coating will remain acceptable after a storm. Do not infer that an inspector’s availability is the same as an inspection approval. Do not infer that a manufacturer’s cure time for one product applies to another coating or to colder, wetter, or otherwise different conditions.

## Freeze the scope, plan revision, survey, and responsibility map

Before checking dirt, freeze the documents that define what the dirt is supposed to become. The first mobilization gate is verified only when the permit holder can show the current permit and approved plan set, identify the plan revision, reconcile the survey or staking record with that revision, and name who will decide when field conditions do not match the documents.

The document packet should include, as applicable:

- the building permit and any separate grading, clearing, site-development, right-of-way, utility, stormwater, demolition, septic, or erosion-control approvals;
- the approved architectural, civil, structural, geotechnical, foundation, drainage, utility, and temporary-control sheets that govern excavation;
- the permit portal status, approved revision, conditions of approval, expiration or commencement rules, and required inspection list;
- the boundary, topographic, and building-location survey or surveyor’s setout record;
- the site logistics plan showing the planned entry, staging, spoil location, delivery route, pedestrian protection, fencing, and protection of adjacent property;
- the soil, geotechnical, groundwater, environmental, or contamination information that the design team says is relevant to the excavation method;
- the erosion and sediment control plan, stormwater permit or exemption analysis, inspection responsibility, and stabilization plan;
- the foundation details, service penetrations, below-grade drainage, waterproofing or dampproofing specification, protection layer, and backfill specification;
- the inspection request sequence, notice lead times, and the record-retention method; and
- a responsibility map with a name, organization, phone number, and decision authority for the owner, permit holder, excavator, surveyor, competent person, civil or geotechnical professional, inspector or AHJ contact, stormwater lead, concrete supplier, waterproofing installer, and designer.

The goal is not to collect every project document in existence. The goal is to prevent a common failure: the excavator receives one drawing, the concrete crew relies on another, the homeowner has a rendering, and the inspector has a third revision. Put the revision and date in the worksheet. If a person says “the latest plans are in the truck,” ask for a copy or a controlled way to verify the version before equipment starts.

### Reconcile the permit with the work package

Ask the permit holder to answer five questions in writing:

1. What exact permit or permit combination authorizes the activity planned for the first day?
2. What is the approved plan revision and where is it posted or available on site?
3. Does the planned first-day work include clearing, grading, mass excavation, foundation trenching, temporary shoring, dewatering, utility work, access work, or only staking and site preparation?
4. Which local inspections, conferences, notices, or site controls must occur before that activity in this jurisdiction and permit type?
5. If the field condition differs from the plan, who can stop work and who can approve a revised design or request an AHJ decision?

The answer must be jurisdiction-aware. A permit-issued site in one city may still require a separate land-use or grading step. The fact that a project is a single-family home does not make every local inspection trigger identical. Local rules also change by permit type, lot conditions, right-of-way use, critical area, floodplain, environmental review, and the agency that administers the work.

### Philadelphia example: initial site, footing, wall, and backfill hold points

In Philadelphia, Pennsylvania, the city’s residential building permit guidance says an initial site inspection reviews site conditions, scope, and schedule; it can be scheduled after required site fencing and pedestrian protection are in place; and construction should not start until the inspection passes. That is a Philadelphia rule for the stated residential permit context, not a nationwide pre-excavation rule. [Philadelphia L&I lists the initial-site trigger and no-start instruction here](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/).

The same Philadelphia page describes a foundation footing inspection after the footing ditches are fully excavated and forms are in place. It lists checks including footing location, depth, width, height, reinforcement, crushed stone, and, for the stated foundation context, bedding, anchor bolts, and CMU-wall reinforcement. It says not to pour concrete until the inspection passes. The homeowner’s gate should therefore distinguish “excavation can begin” from “footing excavation is complete and ready for the footing inspection.” It should also keep the forms and reinforcement visible until the inspector has had the required opportunity to inspect.

Philadelphia also publishes a foundation wall inspection after the wall area is excavated and forms are in place, with a no-pour hold. Later, its damp-proofing and backfill inspection requires the damp proofing to remain visible and uncovered and specified backfill to be accessible. The page says not to backfill until that inspection passes and notes that first-floor framing may be required. [The Philadelphia damp-proofing and backfill sequence is stated on the city page](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/). This does not tell a homeowner that every AHJ uses the same code or inspection code. It tells you what to ask when Philadelphia is the jurisdiction and what kind of concealed-work risk exists elsewhere.

### King County example: conference, posted plans, and lead times

In King County, Washington, the land-use inspection program says approved plans and permits must be posted on site and that projects requiring permit approval require a pre-construction conference before land clearing or grading. Its stated examples include clearing and grading permits and some large residential projects. [King County’s land-use inspection page](https://kingcounty.gov/en/dept/local-services/buildings-property/inspections/land-use-inspections) also says that a land-use/site inspector is assigned after permit approval and the required conference, and that land-use inspections are arranged directly with the assigned inspector rather than through the ordinary building-permit automated system.

King County publishes lead times for its land-use inspections: three working days for a preconstruction meeting and one working day for clearing and temporary erosion control, utility and storm-drainage installation, backfill and compaction, and subgrade completion. Treat those as King County scheduling requirements, not a national promise or a guarantee that an inspector will approve the work. If the project is in King County, put the applicable conference, inspector contact, lead time, and permit number into the gate. If the project is elsewhere, ask the local AHJ for its actual sequence and notice period.

### The handoff from owner to permit holder

The owner should not try to become the site superintendent by remote observation. Instead, require a short pre-mobilization meeting or written confirmation with the permit holder. Ask the permit holder to walk the document packet in the order the work will use it: current plans, survey, locate, erosion controls, logistics, safety roles, inspection path, materials, and change procedure. Record unanswered questions as conditions, not as conversational footnotes.

The next decision is whether the packet is stable enough to verify field controls. If a revised plan is still being coordinated, the safe status is conditional or stop for any work that depends on the revision. Staking and a design coordination meeting may be a legitimate next handoff; excavation based on a superseded foundation footprint is not.

## Verify utilities, erosion controls, access, and the physical starting line

Once the document scope is frozen, verify that the site can receive the planned work without creating a known utility, runoff, access, or neighbor-protection problem. This gate joins four things that are often treated separately: what is buried, what rain can move, how machines and people will enter, and where the building is set out.

### 811 is necessary, but the ticket is not the whole utility investigation

The [811 Before You Dig homeowner guidance](https://811beforeyoudig.com/) describes 811 as a free national before-you-dig service and tells people to contact their state 811 center a few business days before digging. It says the requester should wait for utility responses, confirm that all utilities have responded, and dig carefully around marks. Keep the ticket number, request polygon or work area, request date, utility responses, mark-out photographs, and any state-specific validity or refresh requirement.

Do not treat “ticket complete” as “all lines are known.” Ask the permit holder and excavation contractor:

- What area did the ticket cover, and does it cover the full machine path, spoil area, access route, temporary drainage, and any later foundation or utility trench?
- Which utilities responded, which marked “no conflict,” which did not respond, and how was a non-response handled under this state’s rules?
- Are there private water, sewer, electric, gas, communications, irrigation, geothermal, septic, fuel, or drainage lines that the public locate service may not cover?
- Who will refresh or re-request the locate if the ticket expires, the work area changes, marks are disturbed, or the start date moves?
- What is the procedure when an expected line is found at a different location or depth?

The homeowner can compare the locate area to the civil plan and walk the visible site with the permit holder from a safe location. The homeowner should not probe for a utility, use a shovel in a tolerance zone, direct the operator around a mark, or assume that a painted line is a measured survey of the service. As excavation approaches a marked or expected installation, the employer and qualified field team must determine its exact location using safe and acceptable means under the applicable requirements. [OSHA 1926.651(b)](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651) sets that workplace boundary for covered construction work.

### Survey setout is a record, not a paint color

Ask the surveyor or permit holder to identify the control points, benchmark or elevation reference, building corners, excavation offsets, property or setback references, and date of setout. The record should tell you what was staked and what assumptions were used. “The corners are painted” is an observation; “the surveyor set out the approved foundation footprint from control points A and B on [date]” is a usable record.

The owner can ask for a simple overlay or field walk that compares the approved foundation plan to the site boundary, setbacks, driveway or access, easements, existing structures, and utility marks. If the foundation footprint is close to a property line, wall, sidewalk, neighboring building, tree-protection zone, or easement, ask the designer, surveyor, or engineer how the excavation and temporary support were addressed. Never resolve a boundary or clearance conflict by moving a stake yourself.

Elevation deserves its own check. The setout should connect the foundation bottom, top-of-wall, finished-floor, existing grade, drainage outlet, and access grades to a stated benchmark or datum. A house can be in the correct horizontal location and still be at the wrong elevation. If the field crew proposes “adjusting a few inches,” the change belongs in the plan and approval process. It is not a harmless field convenience where drainage, flood elevation, stairs, setbacks, neighboring grade, or foundation height are affected.

### Erosion and sediment controls must be ready before soil disturbance

Stormwater obligations are jurisdictional and project-specific. The [EPA Construction General Permit frequently asked questions](https://www.epa.gov/npdes/construction-general-permit-cgp-frequent-questions) state that construction activity disturbing one or more acres, or part of a common plan that will disturb one or more acres, and discharging stormwater to waters of the United States generally needs NPDES construction-stormwater permit coverage. EPA also notes that the permitting authority may be a state, tribe, or EPA, and that local requirements can be more stringent. A single-lot project can therefore have obligations that are not obvious from the lot size alone if it is part of a larger common plan.

EPA’s control framework includes erosion and sediment controls, soil stabilization, dewatering, pollution prevention, prohibited discharges, and surface outlets. Its guidance emphasizes that stormwater controls must be selected and maintained for site specifics such as soil, slope, precipitation, layout, nearby waterbodies, and coordination with other operators. The gate should therefore ask for the actual plan or determination, not simply “silt fence installed.” [EPA describes site-specific stormwater planning and SWPPP responsibilities here](https://www.epa.gov/npdes/construction-general-permit-cgp-frequent-questions).

At the physical site, the responsible stormwater or erosion-control person should confirm the controls that must exist before disturbance: stabilized entrance or tracking control, perimeter control, inlet protection where applicable, stockpile protection, diversion or runoff routing, dewatering treatment or discharge path, protection of existing drainage, and a repair and inspection routine. The exact control names and design depend on the approved plan and local program. Your worksheet should list the control, location, installation date, responsible inspector, and failure response.

If a control is damaged, bypassed, buried by mud, overwhelmed by rain, or missing at the point where work will begin, the status is stop for the affected disturbance. Do not treat a plan to install it later as equivalent to the installed control. If there is an authorized exception or staged sequence, record the authority and boundary.

### Access, staging, and neighbors are readiness inputs

A mobilization plan is incomplete if it only shows the building. Check the route for the excavator, dump truck, concrete truck, pump, delivery vehicle, and emergency access that the contractor expects to use. Ask who owns each temporary surface, who protects it, where spoil will be placed, and whether the planned load or vibration is acceptable near a retaining wall, pavement, utility, tree, or neighboring foundation. The excavation team, not the homeowner, must decide safe equipment clearances and edge loading.

Ask where people will walk and where they must not walk. Required fencing, pedestrian protection, warning systems, gates, lighting, and traffic control should be in the permit-holder’s site plan and local inspection conversation. In Philadelphia’s residential example, the city makes required site fencing and pedestrian protection a prerequisite to its initial site inspection and says construction should not start until that inspection passes. That is why a clean-looking lot does not establish readiness.

Document baseline conditions before the first machine: photos from public or authorized areas, visible cracks or movement in adjacent walls and pavements, existing drainage, curb and sidewalk condition, utility markings, trees or protected features, and any neighbor agreements. Baseline photos are evidence of what was visible; they are not a structural condition survey and cannot assign causation if damage occurs. For meaningful risk near an adjacent structure, ask the appropriate engineer or surveyor about a condition survey or monitoring plan.

The next decision is whether the physical starting line matches the document starting line. If the access route requires driving over an unprotected utility, the planned spoil area blocks an inlet, the survey setout conflicts with a boundary, or a neighbor-protection question is unanswered, keep the mobilization conditional or stop and hand the question to the permit holder and design professional.

## Confirm the excavation-safety owner before anyone enters or changes conditions

The homeowner should verify that the contractor has assigned a competent person with authority to inspect and correct excavation hazards. The homeowner should not act as that person. This is the gate where the project acknowledges that soil, weather, water, equipment, adjacent loads, and people can change conditions after the first inspection.

### What the competent-person conversation must cover

Ask the permit holder to identify the competent person by name, employer, contact method, and authority. Confirm that the person will be present or available as the contractor’s safety plan requires and can remove workers from a hazardous area and obtain corrective measures. OSHA’s [competent-person guidance](https://www.osha.gov/etools/construction/trenching/competent-person) connects the role to identifying hazards, selecting or evaluating protective systems, monitoring water removal, determining cave-in potential, classifying soil where applicable, and authorizing immediate removal of employees from danger.

For a homeowner record, ask these questions without trying to answer them yourself:

- How will the excavation be inspected before work, before workers enter, during the shift as conditions change, and after rain or another hazard-increasing event?
- What protective system, slope, bench, shield, shoring, or other method is planned for the actual depth, soil, surcharge, equipment, and adjacent conditions?
- Who decides whether workers may enter, and where is the inspection record kept?
- How will surface water and groundwater be diverted or removed, and who monitors the equipment?
- How are spoil, equipment, trucks, and materials kept from creating a hazard at the edge?
- How will access and egress be provided for the actual excavation, and who checks it after the excavation changes?
- What is the stop-and-call list if a utility, unexpected soil layer, void, odor, contaminated soil, water inflow, movement, or undocumented structure appears?

These are not requests for the homeowner to approve the trench design. They are prompts to verify that a responsible professional has been assigned and that the handoff is explicit.

### Water, weather, and drainage are safety changes

OSHA’s excavation requirements address accumulated or accumulating water, surface-water diversion, and inspections after heavy rain where runoff affects the excavation. The standard says employees must not work in an excavation with accumulated water unless adequate precautions protect them, and that water-removal equipment and operations must be monitored by a competent person. It also addresses excavation below the base of adjoining foundations or retaining walls and requires a support system or other qualifying protection where employee safety or structural stability could be endangered. [Read the water and adjacent-structure provisions in 29 CFR 1926.651](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651).

The homeowner’s weather trigger is not just “did it rain?” Ask what event changes the status. Examples include a rainstorm, runoff into the cut, a rising groundwater condition, freeze-thaw, a vehicle or machine approaching an edge, a change in spoil location, a damaged shoring component, or a nearby structure showing movement. OSHA’s eTool explains that conditions can change during work and calls for inspection before construction, daily before each shift, as needed during the shift, and following rainstorms or other hazard-increasing events. The competent person decides the response.

If a rain event occurs between the readiness meeting and mobilization, do not carry forward a “verified” label without rechecking the affected gates. The responsible person may decide that controls are intact and work can proceed, or may require pumping, repair, drying, reinspection, a revised sequence, or a delay. Record that decision and the conditions it covers.

### Adjacent structures and deep cuts require professional design judgment

A foundation excavation can affect a neighboring foundation, retaining wall, sidewalk, pavement, utility, or buried structure even if the new house is on its own parcel. OSHA requires support systems such as shoring, bracing, or underpinning where adjoining structures’ stability is endangered, and places limits on excavating below a nearby footing unless a qualifying protection or professional-engineer determination applies. These are worker-protection rules; local property, building, right-of-way, and civil requirements may add obligations.

The homeowner should request the relevant design record when the cut is near a structure: temporary-support design, underpinning plan, geotechnical recommendation, monitoring plan, or engineer’s written direction, as applicable. Do not request that the excavator “angle it a little more” to avoid a wall. Do not approve a deeper or wider cut because it gives the crew room. A field change that affects soil support, foundation dimensions, setbacks, drainage, or adjacent property belongs to the qualified designer and permit process.

### Hazardous atmosphere and confined-space boundaries

Excavations can involve hazardous atmospheres, especially near landfills, contaminated soil, fuel lines, tanks, sewers, or equipment exhaust. OSHA’s excavation requirements call for atmospheric testing before employees enter excavations deeper than 4 feet where oxygen deficiency or a hazardous atmosphere exists or could reasonably be expected. A homeowner must not enter a trench, bell-bottom pier hole, deep footing excavation, or other restricted space to “take a look.” Do not send a child, visitor, photographer, or subcontractor into an excavation for documentation.

If odor, discoloration, buried tanks, suspect fill, a dead animal, unusual bubbling, utility damage, or a sudden void appears, stop the affected work and use the contractor’s emergency and environmental escalation plan. Keep people away. The response may involve the competent person, environmental professional, utility owner, fire department, AHJ, or engineer depending on the condition. The next handoff is a qualified response, not a homeowner sample or improvised ventilation.

## Map inspections, hold points, and concealed work before the machine arrives

The inspection sequence should be written before excavation because many checkpoints occur after the activity has created the condition an inspector needs to see. A good schedule names what must be visible, who requests the inspection, the notice lead time, what record proves the result, and what work is prohibited until release.

### Build the sequence around irreversible concealment

A practical sequence is:

1. Current permit and plan revision are confirmed; site logistics, access, fencing, and erosion controls are ready.
2. Required preconstruction conference or initial site inspection is passed, where the AHJ requires one.
3. Survey setout and elevation references are recorded.
4. 811 responses and private-utility investigation are complete for the actual disturbance area.
5. Excavation is performed under the contractor’s safety plan and competent-person inspections.
6. Subgrade, bearing condition, groundwater, unsuitable material, and dimensions are checked by the responsible professionals.
7. Footing forms, reinforcement, embeds, crushed stone, and other required visible work are installed.
8. Footing inspection occurs before concrete placement where required.
9. Foundation wall forms, reinforcement, anchors, penetrations, drainage, and waterproofing or dampproofing are installed in the approved sequence.
10. Wall or below-grade inspections occur before concrete, protection, or backfill conceals the work.
11. Waterproofing is protected, drainage is connected, specified backfill is available, and backfill inspection or release occurs before concealment.

This sequence is illustrative. The permit, approved plans, foundation type, local AHJ, and product system can add, remove, or reorder steps. The point is to ask what becomes impossible to inspect once the next trade proceeds.

### Philadelphia’s published holds show why “we can inspect later” fails

The Philadelphia residential guidance provides a concrete local example. It says the foundation footing inspection is scheduled after full excavation and forms are in place, and concrete should not be poured until the inspection passes. It then describes a foundation wall inspection with a similar no-pour hold. Later, the damp-proofing and backfill inspection requires visible damp proofing and accessible specified backfill, with no backfill until the inspection passes. [Philadelphia L&I’s inspection page](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/) is the controlling source for that Philadelphia example.

The homeowner action is not to memorize inspection codes. It is to put a “do not conceal” label beside each gate in the project record. Ask the permit holder:

- What work must be complete before the inspection can be requested?
- What must remain exposed or accessible?
- Who schedules it and by what channel?
- How much lead time does the AHJ require?
- What work is prohibited after the inspection request but before approval?
- What happens if the inspector finds a correction?
- Where is the passed result or correction notice stored?

If the answer is “we will take pictures and send them,” ask whether the AHJ has expressly approved a virtual inspection for this permit and activity. Philadelphia’s page says its damp-proofing and backfill inspection may be virtual if the inspector approves and provides a separate code for an eligible virtual inspection; that does not make every inspection remotely eligible. A homeowner should never treat a private photo set as an official inspection.

### King County’s lead-time example exposes schedule risk

In King County, the published land-use page lists preconstruction meetings and several site activities with explicit lead times, including three working days for a preconstruction meeting and one working day for clearing and temporary erosion control, utility and storm-drainage installation, backfill and compaction, and subgrade completion. If a contractor schedules equipment tightly against those windows, a missed notice can shift the mobilization even when the machine and crew are available. That is a coordination problem, not a reason to work without the inspection.

Put the lead time in the dependency table alongside the person who must request it. The schedule should show the earliest allowable activity, not just a desired date. If the AHJ has not confirmed the request or the applicable activity code, the date is conditional. For a different county or city, request its current official sequence; do not copy King County’s numbers into another jurisdiction.

### The “nothing hidden yet” rule

Before each concealment step, collect a compact record: the approved detail or sheet, the installer’s completion confirmation, the responsible inspection result, dated photographs with scale or location context, product and batch information if relevant, and any correction or approval. The record is most valuable before backfill, concrete, slab, protection board, or framing blocks visibility.

This does not mean taking hundreds of decorative photos. It means showing the full run, transitions, penetrations, corners, drains, sleeves, repairs, and interfaces that later become difficult to establish. The installer and inspector remain responsible for the work. The owner’s record preserves the decision context and supports the next handoff.

The next decision is whether the inspection path can survive the actual schedule. If the crew plans to excavate, form, pour, waterproof, and backfill in a sequence that leaves no inspection window, stop the schedule discussion and have the permit holder replan it.

## Verify foundation water, product limits, materials, and the backfill dependency

Excavation readiness includes the work that happens after the hole is open. A below-grade assembly depends on water management, drainage, concrete condition, product preparation, protection, and backfill. The exact product and design control the sequence, so the homeowner should ask for the selected system rather than accept “waterproofing” as a generic line item.

### Start with the assembly, not a coating name

For a common below-grade condition, Building Science Corporation describes an exterior waterproofing membrane, an exterior drainage layer, and a perimeter drain connected to a sump pit and pump. Its guidance also distinguishes approaches when groundwater is below or above the foundation and says drawdown and cutoff approaches require experienced civil-engineering judgment and design. [Building Science Corporation’s BSI-146 discussion](https://buildingscience.com/documents/building-science-insights-building-profiles-new-construction/bsi-146-below-grade-water) is conceptual guidance, not a project-specific design.

Ask the designer or contractor to identify the complete assembly:

- where water is expected to go at the wall, footing, slab, and penetrations;
- whether the plan uses dampproofing, waterproofing, drainage mat, protection board, free-draining backfill, perimeter drain, sump, pump, discharge, backup power, or a different approach;
- how service penetrations, joints, corners, transitions, sleeves, drains, and footing-to-wall interfaces are detailed;
- how groundwater or perched water changes the design;
- how the system will be protected from equipment, aggregate, and backfill; and
- which inspection or photo record must exist before the assembly is concealed.

Do not infer that a membrane alone is a drainage system. Do not infer that a sump is a solution to groundwater without a designed discharge and backup strategy. Do not infer that a dry excavation proves the long-term water condition. A professional must reconcile the site investigation, water observations, design, and product system.

### Product cure and weather windows are not interchangeable

The selected product manual belongs in the readiness packet. GCP’s BITUTHENE 4000 data sheet says concrete must be properly cured before application, with a minimum of seven days for normal-weight structural concrete and 14 days for lightweight structural concrete under the stated conditions, and it warns that wet weather or late form removal can require longer drying. It also states temperature and dry-weather conditions for the cited membrane and surface conditioner. [Review the current BITUTHENE 4000 data sheet](https://gcpat.com/en/solutions/products/bituthene-post-applied-waterproofing/bituthene-4000-membrane) before using those numbers.

Sika’s Sikalastic HLM 5000 GC page gives a different product example: it describes application timing after concrete placement or form removal and says appreciable properties develop within 24–48 hours at 75°F and 50% relative humidity. It also requires protection during curing and describes drainage or protection components before backfill. [Review the current Sikalastic HLM 5000 GC information](https://usa.sika.com/en/products/sikalastic-hlm-5000gc.html) before using that system. These two examples demonstrate why a generic “waterproofing cures overnight” statement is unsafe. One manufacturer’s timing cannot be transferred to another material.

Record the product name, current data-sheet date or revision, substrate condition, concrete type, expected temperature and humidity, weather exposure, installer’s preparation plan, cure confirmation, protection layer, and earliest planned backfill. If the forecast moves outside the stated range, the installer or manufacturer’s technical representative must decide whether the sequence changes. The homeowner should mark the gate conditional until that decision is recorded.

### Backfill is a separate decision

Backfill combines inspection, material, compaction, drainage, membrane protection, equipment clearance, and adjacent-load risk. GCP’s BITUTHENE 4000 information says membranes should be protected immediately after application, backfill should be placed as soon as possible with care to avoid damage, and the cited system uses 6- to 12-inch lifts for placement and compaction. Those values belong to that system and its stated guidance; they do not override the approved plans, geotechnical specification, or local inspection requirement.

Before backfill, ask for:

- the passed or released foundation, waterproofing, damp-proofing, and backfill inspection;
- a visible-condition record of the membrane, corners, transitions, penetrations, repairs, drainage mat, protection board, and drain connection;
- the specified backfill material, source or delivery record, and any gradation or contamination requirements;
- the compaction method, lift thickness, testing responsibility, and limitations around the foundation;
- the plan for preventing damage to the membrane and drainage layer; and
- the temporary and permanent surface-drainage plan after the cut is closed.

If the specified backfill is not on site, the inspection cannot see the waterproofing, the protection board is missing, the forecast makes the product condition uncertain, or the inspector has not released concealment, stop backfill. Do not allow a truck to “get the material out of the way” by burying a condition that is still open.

The next decision is whether the foundation can move from visible verification to controlled concealment. If yes, hand the record to the backfill and drainage lead. If not, keep the excavation protected and let the permit holder coordinate the correction.

## Complete the Mobilization Readiness Gate worksheet

The worksheet below is the original Brictale contribution for this page. It is a reusable record-and-question tool, not an official inspection form. Complete one copy for each mobilization or major change in conditions. Keep the owner’s copy with the permit and plan record; the contractor keeps the official safety and inspection records required by its work and jurisdiction.

### Method, inputs, and limitations

**Method.** Each row converts a readiness dependency into five fields: input, responsible person, verification record, stop condition, and next handoff. “Verified” means the responsible party has supplied or confirmed the required record. “Conditional” means the missing piece is bounded, owned, and limited to a stated activity. “Stop” means the activity does not proceed until the qualified responsible person or AHJ closes the issue.

**Original contribution method.** Translate federal excavation-safety requirements, nationwide 811 guidance, Philadelphia and King County inspection steps, EPA stormwater responsibilities, and selected manufacturer sequencing into gates. Each gate records the input, responsible person, verification record, stop condition, and next handoff. Illustrative dependency timing is calculated from stated assumptions and tested against changed permit, rain, locate, and cure conditions.

**Inputs.** Use the project address and jurisdiction; permit numbers and approved plan revision; survey and setout records; 811 ticket and utility responses; private-utility check; erosion-control or stormwater documents; access and staging plan; named competent person; inspection request and lead time; foundation drainage and waterproofing system; product data sheet; concrete and material bookings; weather window; and named handoffs.

**Limitations.** The worksheet is not an engineering design, legal determination, official inspection, safety plan, inspection substitute, or remote authorization. It does not decide soil classification, shoring, underpinning, groundwater control, product compatibility, permit applicability, or whether a worker may enter an excavation. Those decisions belong to qualified professionals, the AHJ, and the current project documents.

**Original contribution limitations.** This is not an engineering design, legal determination, official inspection form, safety plan, inspection substitute, or remote authorization. The permit holder, competent person, designer, inspector, stormwater lead, and product manufacturer control site-specific decisions.

### The worksheet

| Gate | Input to verify | Responsible person | Verification record | Stop condition | Next handoff | Status |
| --- | --- | --- | --- | --- | --- | --- |
| Jurisdiction and permit | AHJ, permit type, permit number, separate grading/site/utility/stormwater approvals, conditions and expiration | Permit holder / owner’s representative | Current permit portal record and permit documents | Permit scope does not authorize planned disturbance or a required approval is unknown | Permit holder obtains AHJ clarification |  |
| Plan revision | Approved architectural, civil, foundation, structural, drainage and temporary-control revision | Permit holder and designer | Plan index, revision date, controlled PDF or printed set on site | Crew has a different or unapproved revision; field change lacks approval | Designer and permit holder reconcile |  |
| Survey and setout | Boundary, controls, corners, offsets, benchmark, elevations and setbacks | Surveyor / permit holder | Surveyor’s setout record and dated field confirmation | Staking conflicts with plan, boundary, easement, setback or elevation | Surveyor and designer resolve |  |
| 811 locate | Work polygon, ticket age, responses, marks and refresh rule | Locate requester / excavation contractor | Ticket, response status, mark-out photos, state-specific validity record | Utility did not respond, marks are missing or disturbed, area changed, private lines unresolved | Utility owner, private locator, or competent contractor |  |
| Site controls | Fence, pedestrian protection, stabilized entrance, perimeter controls, inlet protection, stockpile and runoff plan | Permit holder / stormwater lead | Installation checklist, photos, inspection or SWPPP record | Controls absent, bypassed, damaged, or not approved for this disturbance | Stormwater lead repairs or gets approval |  |
| Access and staging | Machine route, truck route, spoil, deliveries, emergency access, neighbor and right-of-way protection | General contractor / site supervisor | Site logistics plan and baseline-condition record | Route risks utility, edge, structure, pavement, public way or control | Contractor and engineer/AHJ coordinate |  |
| Safety owner | Competent person, authority, protective-system approach, water and weather triggers | Employer / general contractor | Named-person record and site safety plan | No competent person or no authority to stop and correct | Contractor assigns qualified person |  |
| Excavation condition | Soil, groundwater, voids, adjacent footings, edge loads, access/egress and atmospheric hazards | Competent person; engineer where needed | Pre-work and ongoing inspection records | Cave-in risk, water, hazardous atmosphere, movement or unknown condition | Competent person evacuates and escalates |  |
| Inspection path | Initial site, preconstruction conference, footing, wall, under-slab, damp-proofing, backfill, and local equivalents | Permit holder / AHJ | Request confirmation, lead time, passed result or correction notice | Required hold point is not scheduled or work would conceal it | Permit holder replans sequence |  |
| Foundation water | Drainage, waterproofing/dampproofing, sump, discharge, penetrations and protection | Designer / waterproofing installer / contractor | Approved detail, product system, installer record and photos | Assembly or groundwater response is undefined | Designer or qualified water-management professional |  |
| Product window | Product name, current data sheet, substrate, temperature, moisture, cure, protection and backfill timing | Waterproofing installer / manufacturer technical support | Current data sheet and written installation/cure confirmation | Product or conditions do not match stated limits | Installer changes timing or obtains manufacturer direction |  |
| Materials | Concrete, forms, reinforcement, drains, protection, specified backfill and testing | General contractor / suppliers | Delivery or booking records and approved substitutions | Material absent, substituted without approval, or cannot be inspected | Contractor and designer/AHJ approve |  |
| Authorization | Exact activity allowed, exclusions, conditions, decision date and named handoffs | Owner and permit holder | Signed or emailed mobilization note tied to revision | Authorization is vague or treats conditional as approved | Owner and permit holder rewrite boundary |  |

### How to fill the record without pretending to inspect

For each row, write a fact, not a feeling. “Looks complete” is weak. “Permit holder emailed approved plan revision C on September 7; printed set is posted in site trailer; footing detail 3/S-201 is included” is stronger. “811 done” is weak. “Ticket 12345 covers the excavation polygon, utility owners A/B/C responded, owner D marked no facilities, contractor has requested state-required refresh for the delayed start” is stronger. “Safety handled by the foreman” is weak. “General contractor named Jordan Lee as competent person and confirmed authority to stop work; record stored in the site safety file” is stronger.

Add a date, time, source, and person for every meaningful confirmation. If a person cannot answer, write “unverified” rather than filling the blank with an assumption. If the answer depends on another record, link or identify that record. If the record is verbal, send a short written recap and ask the responsible person to correct it if inaccurate.

Do not ask an inspector to pre-approve a complete future sequence by email if the local program does not offer that service. Ask which inspection is required, what must be visible, how to request it, and what the permit document says. Do not ask a manufacturer to guarantee the project schedule. Ask for the current product instructions and a site-specific response if the actual substrate or weather is outside the published example.

### Use a dependency calculation for the first mobilization date

The worksheet becomes more useful when it exposes the critical dependency instead of hiding it inside a calendar promise. Use this simple modeled calculation:

**Earliest permissible activity date = maximum of**

`plan freeze date`  
`+ locate completion and any required waiting or refresh time`  
`+ control installation or preconstruction-conference requirement`  
`+ inspection notice and approval requirement`  
`+ material availability`  
`+ weather or product cure window`.

The formula is not a local code rule and does not calculate a guaranteed start date. It is a way to show which unresolved input governs the date. Use actual dates or bounded durations supplied by the responsible parties.

#### Illustrative worked example

The following is illustrative, not a forecast and not a claim about any specific project. Assume a homeowner’s permit holder proposes the following sequence, with Day 0 as the date the document packet is reviewed:

| Dependency | Illustrative input | Earliest completion |
| --- | --- | --- |
| Approved plan freeze | Revision C is confirmed on Day 0 | Day 0 |
| State 811 locate | Ticket is submitted Day 0; all responses and mark verification are expected by Day 3 | Day 3 |
| Erosion controls | Installation and stormwater-lead check require 1 working day after layout | Day 2 |
| Local conference or initial inspection | AHJ requires 3 working days’ notice and a passed meeting before grading | Day 4 |
| Excavator and spoil logistics | Contractor confirms route and machine on Day 4 | Day 4 |
| First excavation | Begins only after the maximum prior dependency | Day 4 or later |

Here the maximum is Day 4, even though the machine might be available on Day 2. The owner’s decision is not “the excavator can come on Day 2.” It is “Day 4 is the earliest modeled start, subject to the AHJ’s actual release, competent-person inspection, field conditions, and the current locate.” If the jurisdiction is King County and the project is within the land-use program, its published three-working-day preconstruction-meeting lead time and one-working-day clearing/temporary-erosion-control lead time are inputs to verify; they are not a universal rule.

#### Sensitivity table

Use one change at a time to show how fragile the date is:

| Change in assumption | Illustrative effect | New modeled controlling date | Decision response |
| --- | --- | --- | --- |
| Approved plan changes on Day 2 | Reconcile plan, survey, permit and crew packet; assume 2 working days for the project team to close the record | Day 4 or later, depending on AHJ | Conditional until the new revision and setout are verified |
| Heavy rain reaches the site before Day 4 | Reinspect controls and excavation conditions; no fixed duration assumed | Unknown until competent person and stormwater lead release | Stop affected disturbance; document the reinspection |
| A utility owner does not respond | Locate is incomplete; no safe start date can be inferred | Unknown | Stop near the conflict and follow state/local locate escalation |
| Selected waterproofing product changes after concrete booking | Recheck substrate, cure, protection and backfill instructions | Potentially later than concrete or backfill plan | Designer, installer and manufacturer reconcile before ordering sequence |
| Inspector requires a correction | Correction duration is project-specific | Unknown | Do not pour or conceal the affected work; track correction to release |

The sensitivity result is intentionally asymmetric. A clean dependency can establish an earliest possible date, but a failed locate, rain event, plan revision, or failed inspection removes the date rather than adding a universal number of days. That is the right behavior for a high-safety decision: uncertainty becomes a handoff, not a fabricated schedule.

#### What to retain for the owner’s project record

Keep the final worksheet with the approved plan index, permit and inspection records, survey setout, 811 ticket, utility responses, erosion-control record, meeting notes, safety-owner identification, product instructions, material substitutions, weather-related decisions, inspection results, and photo index. Use a consistent file name with date, activity, and plan revision. For example: `2026-09-07_pre-mobilization_gate_plan-C.pdf` or `2026-09-07_foundation-footing-inspection_request.pdf`.

The record should make a later question answerable: “What did the project team know, what was visible, who owned the decision, and what plan revision governed the work on that day?” It should not imply that the homeowner inspected the excavation or that a photo proves compliance. It is a decision trail and handoff record.

### Follow failure branches and make the next handoff explicit

Readiness fails in recognizable ways. The best response is not to improvise a workaround but to identify the failed gate, stop only the affected activity if the professional says that is safe, and hand the question to the person with authority to resolve it.

#### Branch: the permit is issued, but the plan changed

**Observe:** The crew has a newer foundation or civil sheet than the permit packet, or the field setout does not match the approved revision.

**Interpretation:** The document baseline is not stable. A permitted project is not automatically authorized to use every later drawing.

**Stop condition:** Do not excavate based on an unverified footprint, depth, elevation, drainage detail, or temporary-support assumption.

**Next handoff:** Permit holder reconciles the revision with the designer and AHJ; surveyor confirms any changed setout; owner updates the worksheet and authorization boundary.

#### Branch: 811 is complete, but an expected private line is not addressed

**Observe:** The public ticket is closed, but the property has a private service, irrigation line, septic component, geothermal loop, old fuel line, site lighting feed, or undocumented drain in the planned disturbance area.

**Interpretation:** The public ticket may not answer the private-line question. The project needs a responsible method to investigate and protect it.

**Stop condition:** Do not tell the operator to assume the line is shallow, abandoned, or outside the cut. Do not continue where the line’s location is material and unresolved.

**Next handoff:** Permit holder and qualified utility locator, utility owner, surveyor, or designer establish the safe investigation and protection approach under state and local requirements.

#### Branch: the lot is dry, but controls are not installed

**Observe:** No visible mud exists, but the stabilized entrance, perimeter control, inlet protection, diversion, stockpile cover, or discharge route is missing.

**Interpretation:** Weather at one moment does not replace a stormwater plan. The next disturbance may create sediment or runoff before controls can be installed.

**Stop condition:** Do not start the disturbance that depends on the control. A later installation plan is not the same as a verified control unless the approved sequence says so.

**Next handoff:** Stormwater lead or permit holder installs, inspects, documents, or obtains a jurisdiction-specific staged-work determination.

#### Branch: the excavator arrives, but the competent person is absent

**Observe:** The machine is on site, but no one is identified with authority to inspect and correct excavation hazards.

**Interpretation:** Equipment availability is not safety readiness.

**Stop condition:** Do not let the homeowner, surveyor, delivery driver, or an unassigned laborer substitute for the competent person. Do not enter the cut.

**Next handoff:** General contractor identifies the competent person, confirms the protective-system and inspection approach, and records the start-of-work inspection before worker exposure.

#### Branch: water enters the cut

**Observe:** Standing water, inflow, runoff, saturated soil, sloughing, pumping, or a rising water level appears.

**Interpretation:** The excavation and stormwater conditions changed. Water removal can create or hide hazards; pumping is not a homeowner approval.

**Stop condition:** Keep workers out until the competent person determines the required precautions and, where needed, the designer or engineer changes the approach.

**Next handoff:** Competent person, stormwater lead, geotechnical or civil professional, and AHJ as applicable. Record the event, response, and reinspection.

#### Branch: the inspector cannot come before the pour or backfill booking

**Observe:** Concrete or backfill is scheduled, but the required inspection request is unconfirmed or the inspector has not released the hold.

**Interpretation:** The schedule is trying to outrun the hold point.

**Stop condition:** Do not pour or conceal work that the AHJ requires to remain visible. Do not convert private photos into an inspection.

**Next handoff:** Permit holder contacts the AHJ through the permitted channel, records the instruction, and reschedules the trade if necessary.

#### Branch: waterproofing is installed, but the product window is uncertain

**Observe:** The product changed, concrete is younger or wetter than expected, the weather is outside the data sheet example, protection is delayed, or the installer cannot state when backfill may begin.

**Interpretation:** Product compatibility and cure are unresolved. GCP and Sika publish different product conditions, which is why the product-specific record matters.

**Stop condition:** Do not backfill or expose the membrane to traffic based on a generic cure claim.

**Next handoff:** Waterproofing installer checks the current product data sheet and obtains manufacturer or designer direction where conditions are outside the published limits; inspector confirms any local hold.

#### Branch: the owner receives only a verbal “all good”

**Observe:** No one can provide the plan revision, ticket, inspection request, safety owner, or product record, but the crew wants to proceed.

**Interpretation:** The decision is not auditable and the handoff is undefined.

**Stop condition:** Do not authorize the full mobilization based on a verbal summary.

**Next handoff:** Permit holder sends a bounded readiness statement with exceptions, responsible people, records, and next review time. The owner decides whether a narrowly defined preparation task is acceptable or whether the entire activity remains stopped.

## Make the authorization conversation short, specific, and repeatable

The final pre-mobilization meeting should end with a one-page decision, not an atmosphere of optimism. Read each open condition aloud. For every “conditional” item, name the exact activity that may continue and the activity that may not. For every “stop” item, name the person who must close it and the record that will prove closure.

Use this closeout sequence:

1. State the address, jurisdiction, permit numbers, approved plan revision, and planned first-day activity.
2. Read the status of every worksheet row.
3. Confirm the competent person and the safety stop authority.
4. Confirm the 811 and private-utility position for the actual disturbance area.
5. Confirm erosion controls, access, staging, public protection, and neighboring-structure precautions.
6. Confirm inspection or conference prerequisites and notice records.
7. Confirm the product, concrete, drainage, protection, and backfill sequence without transferring one manufacturer’s instructions to another product.
8. Write the authorization sentence and exclusions.
9. Name the next handoff and the event that reopens the gate: rain, changed plan, changed work area, utility conflict, failed inspection, unexpected soil or water, or product condition outside its instructions.

The answer to “is the site ready?” should then be precise: “Verified for [defined activity], conditional on [named item], stopped for [named item], with [person] responsible and [record] required before [next activity].” That is a better homeowner decision than an unsupported yes or no because it preserves the sequence and makes the next decision visible.

### Compact originality brief

**Current answers:** Official sources separately publish excavation-safety requirements, 811 notification guidance, local inspection triggers, stormwater controls, and product installation instructions. Generic homeowner checklists rarely connect those sources to one owner-facing go/no-go decision.

**Missing decision:** Whether a permit-issued single-family site is ready for the first excavation or foundation-mobilization day, or whether a missing permit, plan, locate, control, safety, inspection, material, or product record requires a stop.

**Original contribution:** The Mobilization Readiness Gate worksheet, with status categories, named owners, evidence records, stop conditions, handoffs, and an illustrative dependency calculation with sensitivity to changed plans, rain, failed locates, inspection corrections, and product cure windows.

**How to check it:** Compare each worksheet row to the cited primary source and the project’s actual AHJ, permit, approved plan revision, state 811 rules, competent-person record, stormwater documents, inspection record, and selected product manual. Review the method and limitations in this article with the permit holder and qualified professionals; do not treat the worksheet as an official approval.

The next decision after a verified mobilization gate is not “construction is now safe forever.” It is whether the next activity has its own verified inputs and hold point. Reopen the gate whenever the plan, weather, water, utility information, soil, access, adjacent conditions, inspection status, material, or product changes.

## Evidence

- Before an excavation opens, the estimated location of underground utility installations must be determined; utility owners must be contacted within established or customary local response times, and the exact location must be determined by safe means as excavation approaches the estimate. [29 CFR 1926.651 Specific Excavation Requirements](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651). Scope: U.S. federal OSHA construction workplace requirements; applies to covered excavation work and does not replace state or local locate law.. Accessed: 2026-09-07.
- A competent person must inspect excavations, adjacent areas, and protective systems before work and as needed during the shift, including after rainstorms or other hazard-increasing events when employee exposure can reasonably be anticipated. [29 CFR 1926.651 Specific Excavation Requirements](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651). Scope: U.S. federal OSHA construction workplace requirement; worker protection boundary, not a homeowner inspection service.. Accessed: 2026-09-07.
- OSHA requires precautions for accumulated water, protection when excavation may endanger adjoining structures, and protection for material or equipment that could fall or roll into an excavation. [29 CFR 1926.651 Specific Excavation Requirements](https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.651). Scope: U.S. federal OSHA construction workplace requirements for water, adjacent structures, and edge hazards.. Accessed: 2026-09-07.
- 811 is a free national before-you-dig service; the requester should contact the state 811 center a few business days before digging, wait for utility responses, confirm all utilities have responded, and dig carefully around marks. [811 Before You Dig: How does 811 Work?](https://811beforeyoudig.com/). Scope: Nationwide public education from the Common Ground Alliance; timing, ticket validity, private utilities, tolerance zones, and enforcement remain state/local matters.. Accessed: 2026-09-07.
- For Philadelphia residential building permits, the initial site inspection reviews site conditions, scope, and schedule; it can be scheduled after required fencing and pedestrian protection are in place, and construction should not start until it passes. [City of Philadelphia L&I: Inspections by permit type](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/). Scope: City of Philadelphia, Pennsylvania residential building permit inspection guidance; not a national rule and not necessarily applicable to every permit type.. Accessed: 2026-09-07.
- For Philadelphia residential building permits, the foundation footing inspection follows full excavation and form placement, and concrete should not be poured until the inspection passes; the city lists location, dimensions, reinforcement, bedding, anchor bolts, and CMU-wall reinforcement among checks. [City of Philadelphia L&I: Residential Building Permits inspections](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/). Scope: City of Philadelphia, Pennsylvania; the described inspection code and sequence are permit-type and jurisdiction specific.. Accessed: 2026-09-07.
- For Philadelphia residential building permits, damp proofing and backfill inspection requires the damp proofing to remain visible and specified backfill to be accessible; backfilling should wait until the inspection passes, and the inspector may require first-floor framing. [City of Philadelphia L&I: Residential Building Permits inspections](https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections-by-permit-type/). Scope: City of Philadelphia, Pennsylvania; may differ for another AHJ, permit, foundation system, or inspection method.. Accessed: 2026-09-07.
- King County, Washington requires approved plans and permits to be posted on site and requires a pre-construction conference before land clearing or grading for projects requiring permit approval, including clearing and grading permits and some large residential projects. [King County, Washington: Land use inspections](https://kingcounty.gov/en/dept/local-services/buildings-property/inspections/land-use-inspections). Scope: King County, Washington land-use/site inspection program; applicability depends on project and permit type.. Accessed: 2026-09-07.
- King County lists lead times including 3 working days for a preconstruction meeting and 1 working day for clearing and temporary erosion control, utility and storm drainage installation, backfill and compaction, and subgrade completion. [King County, Washington: Required lead times for land use inspections](https://kingcounty.gov/en/dept/local-services/buildings-property/inspections/land-use-inspections). Scope: King County, Washington land-use inspections; these lead times are not a national scheduling promise.. Accessed: 2026-09-07.
- EPA says construction activity that disturbs one or more acres, or is part of a common plan that will disturb one or more acres, and discharges stormwater to waters of the United States generally needs NPDES construction stormwater permit coverage; state, tribal, and local requirements can also apply. [U.S. EPA: Construction General Permit Frequent Questions](https://www.epa.gov/npdes/construction-general-permit-cgp-frequent-questions). Scope: Federal NPDES construction-stormwater framework; EPA is not the permitting authority everywhere and site-specific jurisdiction must be checked.. Accessed: 2026-09-07.
- EPA describes construction stormwater controls as site-specific and includes erosion and sediment controls, soil stabilization, dewatering, pollution prevention, prohibited discharges, and surface outlets among relevant requirements; permitted sites use a SWPPP and inspections by qualified people. [U.S. EPA: Construction General Permit Frequent Questions](https://www.epa.gov/npdes/construction-general-permit-cgp-frequent-questions). Scope: Federal CGP guidance and questions; local programs may be more stringent or control the permit.. Accessed: 2026-09-07.
- GCP's BITUTHENE 4000 data says concrete must be properly cured before application, with a minimum of seven days for normal-weight structural concrete and 14 days for lightweight structural concrete under the stated product conditions, with longer drying potentially required. [GCP Applied Technologies: BITUTHENE 4000 System Data Sheet](https://gcpat.com/en/solutions/products/bituthene-post-applied-waterproofing/bituthene-4000-membrane). Scope: One named manufacturer/product system; not a universal waterproofing cure rule and subject to current data sheet, substrate, weather, and application conditions.. Accessed: 2026-09-07.
- GCP's BITUTHENE 4000 data says membranes should be protected immediately after application, backfill should follow as soon as possible with care, and backfill should be placed and compacted in 6- to 12-inch lifts under the cited system guidance. [GCP Applied Technologies: BITUTHENE 4000 System Data Sheet](https://gcpat.com/en/solutions/products/bituthene-post-applied-waterproofing/bituthene-4000-membrane). Scope: One named manufacturer/product system; the selected design, protection board, soil, compaction specification, and AHJ can change the required sequence.. Accessed: 2026-09-07.
- Sika's Sikalastic HLM 5000 GC page says its product can be applied at stated times after concrete placement or form removal and that appreciable properties develop within 24–48 hours at 75°F and 50% relative humidity; it also calls for protection during curing and protection or drainage components before backfill. [Sika: Sikalastic HLM 5000 GC](https://usa.sika.com/en/products/sikalastic-hlm-5000gc.html). Scope: One named manufacturer/product system and stated reference conditions; not interchangeable with GCP or another coating.. Accessed: 2026-09-07.
- Building Science Corporation describes below-grade water management as an assembly involving exterior waterproofing, a drainage layer, and a perimeter drain connected to a sump or pump in one common condition, and says groundwater drawdown and cutoff approaches require experienced civil-engineering judgment and design. [Building Science Corporation: BSI-146 Below Grade Water Management](https://buildingscience.com/documents/building-science-insights-building-profiles-new-construction/bsi-146-below-grade-water). Scope: Building-science guidance and conceptual assemblies; not a project-specific design or code determination.. Accessed: 2026-09-07.