# En 506.03 On-site Storage

**Citation:** N.H. Admin. R. En 506.03  
**Type / status:** regulation / current  
**Agency:** New Hampshire Department of Energy  
**Effective:** 2023-10-25  
**Published:** 2023-10-25

En 506.03 On-site Storage.

## Document text

En 506.03 On-site Storage.

(a) Unless separately addressed in a utility's integrated resource plan as defined in Puc 508.01(e), and approved by the commission, each utility shall determine its maximum projected design week demand based on the coldest historical consecutive 7-day period, otherwise known as the 7-day design demand, and determine the amount of firm gas supply to be furnished by natural gas pipeline deliveries and on-site storage inventory, if any, necessary to satisfy the 7-day design demand.

(b) In connection with the operation of its peak shaving facilities, each utility shall retain a minimum on-site storage inventory volume for peak-shaving between December 1 and February 14 of each year that is equivalent to the volume of on-site storage inventory deemed necessary to satisfy the 7-day design demand as determined in (a) above.

(c) Railway tank cars on the utility's rail sites shall be considered as on-site storage.

(d) A utility may count as on-site storage 70% of the guaranteed daily delivery capability over a 5-day period from a firm bulk fuel supply point or off-site storage facility for any situation in which the utility:

(1) Owns or leases tank trucks;

(2) Has a firm fuel supply purchase contract; or

(3) Has a dedicated supply and delivery service contract.

(e) As of February 15 of each year, the above minimum on-site storage inventory volume may be reduced to 75% of the December 1 requirement above.

(f) As of March 1 of each year, the above minimum on-site storage inventory volume may be reduced to 50% of the December 1 requirement above.

(g) Each utility shall notify the department's enforcement division each week during the period from December 1 through April 1 of its on-site storage inventory levels.

(h) The information required by (d) and (e) above shall be submitted by electronic mail or through the department's electronic report filing system (ERF) on each Tuesday, or the next day following a state holiday.

Source. #13796, eff 10-25-23

## Provenance

- Official: Yes
- Source: <https://gc.nh.gov/rules/state_agencies/en500.html>
- Source ID: `nh-general-court-en-500`
- SHA-256: `ad3683f655b6ba4e7e32f07d6a783c44fac1ac76cd58b1319168cd0f9398c27b`
- Retrieved: 2026-08-20T08:23:25.693Z
- Exported: 2026-08-23T06:15:52.260Z
- Document slug: `nh-admin-rules-en-506-03`

### Source metadata

```json
{
  "jurisdiction": "US-NH",
  "chapter": "En 500",
  "part": "506",
  "documentNumber": "#13796",
  "certificationScope": "intrastate-gas",
  "federalPartsReferenced": [
    191,
    192,
    193,
    198,
    199
  ],
  "fixedFederalBaseline": null,
  "laterFederalAmendmentsIncludedByText": true,
  "references": [
    {
      "citation": "En 506.03",
      "referenceType": "state_regulation",
      "url": "https://gc.nh.gov/rules/state_agencies/en500.html"
    }
  ],
  "caveats": {
    "exactScope": "Bounded current direct pipeline-safety corpus of 36 sections in New Hampshire Administrative Rules Chapter En 500, effective October 25, 2023. It includes governing scope, safety-defined terms, emergency and incident duties, pipeline standards, safety records and maps, accidents and leaks, directly associated forms, and enforcement for gas pipeline utilities.",
    "excludedScope": "This is not all New Hampshire gas or pipeline law. Seventy-nine current En 500 sections concerning service, gas quality, meters, general accounting, supply, federal filings, or specialized LPG and landfill-gas programs are inventoried but not searchable. En 511 and En 512 are adjacent because the official PHMSA evidence proves intrastate-gas certification generally but does not independently establish that every state-defined LPG or landfill operator falls within that certification. En 800 damage prevention, En 1400 pipeline-utility economic regulation, statutes, forms, orders, federal text, private standards, interstate gas, hazardous liquids, and underground storage are excluded.",
    "applicability": "Applicability depends on operator and utility status, commodity, facility, activity, intrastate or interstate status, PHMSA and FERC jurisdiction, master-meter and LPG thresholds, waivers, orders, and the text in force on the relevant date. PHMSA states that New Hampshire is certified for intrastate gas; PHMSA retains interstate gas and both intrastate and interstate hazardous-liquid inspection and enforcement. The connector does not infer hazardous-liquid or underground-storage certification.",
    "incorporation": "En 506.01 requires compliance with 49 CFR Parts 191, 192, 193, 198, and 199, including future amendments, and contains additional state requirements and incorporated private standards. The rule does not state a fixed federal edition. This connector links but does not reproduce federal or private standards and does not decide whether every later federal amendment is validly incorporated for every state-law purpose.",
    "publication": "The New Hampshire General Court administrative-rules publication is the controlling current text used here. Document #13796 adopted En 500 effective October 25, 2023. The official Puc 500 revision note confirms that former PUC safety provisions were deleted and transferred to En 500; Puc 500 is not treated as parallel current safety text. Retrieval time is publication observation, not a legal event.",
    "rights": "Official New Hampshire and federal government artifacts are retained with attribution and SHA-256 provenance. Public access does not resolve rights in site presentation, seals, agency marks, forms, linked works, or incorporated private standards; downstream redistribution requires separate review."
  },
  "region": "NH"
}
```