Prequalification
The prequal metrics GCs vet on — with the source behind each.
Safety record, bonding capacity, insurance limits, and licensing for general-contractor prequalification. Each metric is backed by a current document — COI, EMR letter, surety letter, and license — issued directly to general contractors on request so every copy you receive is current and addressed to your project.
Gatekeeper metrics
Safety, bonding, insurance & licensing at a glance
The numbers a procurement team checks first. Each carries a source microline so it can be confirmed against the underlying certificate or letter.
Massachusetts Construction Supervisor License
VerifiedCS-122896 — Unrestricted
Source: Held by Jean W Prinsloo. Class: Unrestricted — buildings containing less than 35,000 cubic feet of enclosed space. Expires 03/02/2030. Licence card furnished with the prequal package.
Issued by Commonwealth of Massachusetts, Board of Building Regulations and Standards · · expires
General liability
Verified$1M occurrence / $2M aggregate
Source: Certificate of insurance dated 06/10/2026, policy term 06/06/2026–06/06/2027. $1,000,000 each occurrence; $2,000,000 general aggregate; $2,000,000 products & completed operations aggregate; $1,000,000 personal & advertising injury. Additional insured on ongoing AND completed operations, primary & non-contributory, with waiver of subrogation.
Issued by Next Insurance US Company (NAIC 16285) · · expires
Umbrella / excess liability
Verified$2M occurrence / $2M aggregate
Source: Occurrence form, same policy program and term as the general liability line.
Issued by Next Insurance US Company (NAIC 16285) · · expires
Contractors errors & omissions
Verified$25k occurrence / $50k aggregate
Source: Carried on the same policy program. Stated plainly because a GC's prequal form asks, and because the limit is modest — larger E&O is available on request where a project requires it.
Issued by Next Insurance US Company (NAIC 16285) · · expires
Workers' compensation & employer's liability
VerifiedStatutory · EL $2M / $2M / $2M
Source: Certificate of insurance dated 06/06/2026, policy term 06/06/2026–06/06/2027. Workers' compensation per statute; employer's liability $2,000,000 each accident / $2,000,000 disease each employee / $2,000,000 disease policy limit.
Issued by Berkshire Hathaway Direct Insurance Company (NAIC 10391) · · expires
OSHA recordable incident record
VerifiedZero recordables · 2023–2025
Source: Zero OSHA recordable injuries or illnesses in 2023, 2024 and 2025; no fatalities, hospitalisations, amputations or citations. As a firm of ten or fewer employees, ESC is partially exempt from routine OSHA 300/300A/301 recordkeeping under 29 CFR 1904.1(a)(1), and reports under 29 CFR 1904.39 and 1904.42. Certified by ESC in writing — this is a signed certification, not a third-party audit.
Issued by Earth Support Corp. signed certification ·
Stressing equipment calibration
Verified60-ton jack train · calibrated 06/2026
Source: Independent calibration of the 60-ton jack (#047990), ENERPAC pump and WIKA 316SS 10,000 psi gauge as a matched train, 0–9,000 psi in 1,000 psi steps. Calibrated 22 June 2026 by Thompson & Lichtner of Canton, MA. The report states no expiry; ESC recalibrates annually.
Issued by The Thompson & Lichtner Company, Inc. (Lab ID 11176) ·
Written safety & health program
VerifiedOSHA-aligned · Rev 1.0 + 12 JHAs
Source: Written Safety and Health Program (Rev 1.0), an Activity Hazard Analysis for drilled pier installation, and twelve task-level Job Hazard Analyses. Jean Prinsloo is the designated Competent Person for excavation, rigging, silica, fall protection and daily rig inspection, and holds stop-work authority. Aligned to OSHA construction standards; the programme is ESC's own, not a third-party certification.
Issued by Earth Support Corp. ·
Experience Modification Rate (EMR)
On requestOn request
Source: Provided to general contractors on request — current EMR letter, issued directly by our broker, Next First Insurance Agency.
Bonding capacity
On requestOn request
Source: Provided to general contractors on request — surety letter, single and aggregate.
ISNetworld / Avetta
On requestPrequal-ready
Source: The full prequalification packet — certificates, licence, safety programme and JHAs — is assembled and issued on request in whatever format your portal requires. ESC is not currently enrolled in ISNetworld or Avetta; we enrol on award where a GC requires it.
Each figure above is backed by a current certificate or letter we issue to general contractors on request, rather than a static number posted publicly — so the copy you receive is always current and addressed to your project. Request the package below and we’ll send the matching documents with the values filled in.
Prequal documents
Certificates & program summaries
The standard prequal package. These are issued to general contractors on request so every copy is current and addressed to your project.
Safety & OSHA compliance
A safety program built for high-consequence ground
Deep foundations are buried, irreversible work next to occupied structures. Our program is written to OSHA standards and kept prequal-ready.
OSHA-aligned program
Field operations follow an OSHA-compliant health & safety program, including required competent-person oversight for excavation, trenching, and rigging.
Prequal-ready documentation
Safety manual, certificate of insurance, and EMR letter are maintained for general-contractor prequalification and supplied on request.
Daily site discipline
Task-specific job hazard analysis, daily toolbox talks, and PPE enforcement keep crews and adjacent structures protected on every dig.
Industry standards
Aligned with the deep-foundation industry bodies
We hold our means, methods, and safety to the standards of practice published by the foundation-engineering and pile-driving associations. Follow any badge to its issuer.
- Deep Foundations InstituteDeep-foundation engineering standards
- ADSC: The International Association of Foundation DrillingDrilled shafts & anchored earth retention
- Pile Driving Contractors AssociationDriven-pile best practices & safety
- Associated General Contractors of AmericaGeneral-contracting standards & safety
- Associated Builders and ContractorsMerit-shop construction & STEP safety
Need our prequal package?
Tell us the GC, the project, and your prequal portal (ISNetworld, Avetta, or your own form) — we'll return current certificates and a quote within 3 days.