ReChill Systems · speculative install sketch · page 1 of 4
Del Mar Food Products
Watsonville, CA · Family-owned · 100,000 sq ft processing + freezing · packs for Green Giant
DOC. RC-SKETCH-003
2026-05-28
T. ELLSWORTH
JUST WONDERING
Del Mar's 2021 EPA settlement is in the public record. Hover the toggle — same dock, same docks, same packs going out for Green Giant. But the engine room — and everything that goes with anhydrous ammonia at 12,000 lb — disappears.
AS IS12,000 lb anhydrous ammonia central plant
TO BEReChill distributed CO₂ fleet, zero ammonia
What's there nowCentral NH₃ rack feeding IQF tunnels, processing zones, and frozen storage. Above the 10,000 lb federal PSM threshold. Above the 500 lb CalARP threshold. Documented EPA Clean Air Act settlement filed 2021 for inadequate NH₃ mitigation.
What ReChill would put there4 × C40 distributed across processing + storage + IQF feed. Variable-speed CO₂ throughout. Hot-swap battery cartridges. Zero ammonia on site. No PSM, no RMP, no CalARP.
Installed Load
~350 TR340 TR
12,000 lb NH₃ centralvariable, scaled
kW / TR
2.51.5
field rulepart-load matched
Annual Electric
$1.1M$515K
@ $0.14/kWh35% off-peak
NH₃ Column
$170-445KZERO
PSM+RMP+labor+ins.column deleted
The thing that made me sit down and run this
The electricity savings get the headline. The ammonia column is the bigger number nobody talks about.
Page 2 is the audit. Page 3 is where CO₂ is already running this morning. Page 4 is the parts list and the math.
ReChill Systems · the ammonia audit · page 2 of 4
What the ammonia actually costs.
Del Mar Foods · annual operating burden beyond the electricity bill
DOC. RC-SKETCH-003
2026-05-28
T. ELLSWORTH
JUST WONDERING
The electricity bill is one number. The ammonia column is a whole accounting category — compliance, labor, insurance, audits, enforcement risk, training, contractor coverage. Almost nobody runs it as a single line because it's spread across HR, ops, finance, and the COO's emergency reserve. Below is the typical mid-sized NH₃ facility burden as best I can construct it from public sources + IIAR practitioner literature. Del Mar's documented EPA enforcement history is in there because it's already on your record.
The cost stack · what a mid-sized NH₃ plant pays every year
Category
Low ($K/yr)
High ($K/yr)
PSM compliance program
14-element OSHA 1910.119 program · PHA every 5 yrs · MI inspections · MOC procedures · ops manuals · audits every 3 yrs
$30K
$60K
EPA RMP filing + audits
40 CFR 68 Risk Management Plan · 5-year refiling · public disclosure · independent audits
Hazwoper · fit testing · SCBA + gas detector replacement · NH₃ scrubber / dump tank maintenance
$10K
$20K
Enforcement reserve (probabilistic)
Del Mar 2021 settlement was $131K · industry avg NH₃ incident $250K-2M · expected value across all NH₃ operators
$20K
$100K
ANNUAL AMMONIA COLUMNbeyond the electricity bill · band reflects uncertainty, sized at your scale
$170K
$445K
The Del Mar specific overlay
2021 EPA Clean Air Act settlement · $131,420 penalty for inadequate NH₃ release prevention.
That's the floor on the "enforcement reserve" line above — it already happened. Add in the post-settlement
insurance renewal impact, the consent-decree mitigation work, and the ongoing supervised compliance status
and the real Del Mar burden runs at the higher end of the band — closer to $204-$445K/yr
than the midpoint. CO₂ has none of these line items because CO₂ doesn't have a PSM threshold,
doesn't have an RMP filing, doesn't have an EPA NH₃ release prevention program, and doesn't trigger
RETA certification requirements for operators.
The summary line
Add it up: somewhere between $170K and $445K a year at the typical mid-sized NH₃ facility, on top of the electricity bill. Most of it doesn't appear on the refrigeration line. It's spread across compliance, ops, HR, and insurance. When the ammonia goes to zero, this whole column goes to zero with it. Not partially — entirely. CO₂ doesn't have a PSM threshold, doesn't have an RMP filing, doesn't need RETA-certified operators, doesn't trigger CalARP, doesn't carry the pollution liability premium.
ReChill Systems · the CO₂ landscape · page 3 of 4
Where CO₂ is already winning.
Del Mar Foods · the case studies you can verify without taking my word
DOC. RC-SKETCH-003
2026-05-28
T. ELLSWORTH
JUST WONDERING
Transcritical CO₂ is not theoretical. It's not pilot-stage. It's been the default refrigerant in European supermarket retail for over a decade and is now scaling fast in North America. Here's where you'll find it running production today — the case studies you can verify without taking my word for any of it.
Supermarket retail · the biggest deployment
870+ industrial transcritical CO₂ sites in North America (2024) · +74% year-over-year · 4,900+ in Europe
Aldi US — national rollout, every new store transcritical
Lidl US — same, every store specs CO₂
Whole Foods (Amazon) — corporate ESG mandate for refrigerant transition
Sprouts Farmers Market — 60+ stores converted
Save-A-Lot, ShopRite, Wegmans, Heinen's — all running transcritical
Every Aldi or Whole Foods within 30 miles of Watsonville is a transcritical CO₂ plant running this morning. The technology is shipping, not hypothetical.
Cold storage 3PLs · closest comp to processing
Industrial cold storage CO₂ adoption accelerating; Hillphoenix containerized packs deployed PNW; SCM Frigo (Italy) and Absolutely Chilled (S. Africa) shipping packs to NA cold storage operators
Lineage Logistics — announced CO₂ pilot facilities (2024)
US Cold Storage — exploring NH₃-to-CO₂ for new builds
Same physics as your processing + storage. Same temperature ranges, same duty cycles. The cold-storage 3PLs running CO₂ are doing exactly the work you do.
Food + beverage processing
Major CPGs transitioning to natural refrigerants under corporate sustainability mandates
Mars · CO₂ transcritical at European confectionery plants
Nestlé · CO₂ for new plant construction
Coca-Cola · CO₂ in vending + bottler cold chain
Tyson Foods · CO₂ trial at chicken processing (2023)
JBS · CO₂ retrofit at beef facility
Bitzer + Mayekawa CO₂ industrial racks
If Green Giant moves to a refrigerant-transparency reporting requirement (it's coming), your Watsonville packs become more valuable when the plant behind them is CO₂.
Norwegian salmon · the gold standard
~80% of new Norwegian salmon processing plants spec CO₂ transcritical since 2020 (Refindustry / IIR)
Mowi, SalMar, Lerøy, Cermaq — across Norway
Industry-wide design lessons are documented and public
Operating data from cold-ambient Norway is the engineering reference for ReChill's cold-CA Watsonville case
GEA, Mayekawa CD-series, Bitzer
Seafood-adjacent processing at scale. Norwegian operators don't pilot — they spec at full plant scale. The case studies are tightly documented and translate directly.
Marine reefer containers · already global
Carrier Vector 7100 series runs full R-744 CO₂ · Maersk has converted significant fleet to CO₂ reefers
Carrier Vector 7100 · Carrier Vector eCool · all CO₂
Maersk · CO₂ reefer fleet conversion underway
Hapag-Lloyd · pilot deployments
Daikin Container Refrigeration · CO₂ portfolio
Carrier, Daikin, Thermo King
Every container of frozen product on the ocean today is going through industrial CO₂ refrigeration at some point. The marine industry already won this argument. Land is catching up.
And then the honest part: CO₂ transcritical hasn't replaced NH₃ everywhere — yet. The two real reasons:
High-ambient capacity loss. Above ~25°C (77°F) outdoor temp, transcritical CO₂ efficiency drops 15-30% vs ammonia. The Gulf Coast cares; coastal CA (Watsonville averages 65°F) cares much less. ReChill's variable-speed + parallel-compression + ejector design directly addresses this.
Industry muscle memory. 40 years of refrigeration engineers grew up sizing NH₃. IIAR is the dominant standards body, RETA is the dominant cert. Switching is a workforce + culture investment, not just an equipment swap. The supermarket sector pushed through this faster because the chains have national procurement and corporate ESG mandates. Independent operators move when one operator goes first in their region — that's the opportunity here.
ReChill Systems · the math + the install · page 4 of 4
I keep checking the math.
Del Mar Foods · ~350 TR · variable-speed CO₂ swap · ammonia column deleted
DOC. RC-SKETCH-003
2026-05-28
T. ELLSWORTH
JUST WONDERING
What the parts list looks like
processing + storage zones + IQF feed
4 × ReChill C40
340 TR · $1.6M
combined continuous capacity
variable-speed, scales to actual load
340 TR installed
refrigerant
CO₂ transcritical · R-744
no NH₃ · no PSM
drive train
Tesla M3 IPMSynRM + Bitzer CO₂ head
96% η · VFD throughout
BACK-OF-NAPKIN TOTAL
$1.6M
The math · electric + ammonia column
installed thermal load (est.)350 TR
R-717 (NH₃) rack @ 2.5 kW/TR875 kW
24/7 operation7.7 GWh/yr
PG&E blended industrial$0.14/kWh
current electric bill (est.)$1.1M/yr
ReChill @ ~1.5 kW/TR variable speed525 kW
35% off-peak shift @ $0.06/kWh$515K/yr
ELECTRIC SAVINGS~$558K / yr
+ AMMONIA COLUMN ELIMINATED+$170-445K / yr
What it would actually look like to do
D 0
Engine room walk · nameplate inventory · 12 months of bills
D 30
Pad prep · existing engine room footprint reused
D 60
First 2 × C40 land · run in parallel with the NH₃ rack
D 90
C40 #3 + #4 land at IQF + processing · transition begins
D 110
NH₃ rack decommissioned one zone at a time · packs sold off-site
D 120
Del Mar on ReChill. NH₃ gone. PSM filing closed. RMP withdrawn.
Why nobody's noticed yet
Every refrigeration engineer who's spec'd a Watsonville plant in the last 40 years spec'd NH₃ because it was the right answer at the time. It isn't anymore. The math has been quietly inverting for a decade — PSM compliance got more expensive, RETA-certified labor got scarcer, insurance carriers got pickier, and meanwhile transcritical CO₂ packs went from European-only to mainstream. Nobody's rerun the math for an existing operator yet because the existing operators are busy running the plant.
How to read this · TR, kW/TR, and the math
TRTon of Refrigeration
12,000 BTU/hr of cooling capacity. The unit US industrial refrigeration thinks in.
Named for the rate one ton of ice absorbs heat as it melts.
1 TR ≈ 3.5 kW of heat removed.
A walk-in cooler is ~5 TR; a small blast tunnel is ~50 TR; a big NH₃ plant is hundreds of TR.
kW/TRelectrical efficiency
Electrical power IN per ton of cooling OUT. Lower is better (like fuel economy, but inverted).
Old NH₃ plant field rule: 2.5. ReChill variable-speed target: 1.5.
That ratio is the whole savings story in two numbers.
The line I keep saying out loud when I run the numbers
Drop the entire ammonia column from your operating budget. Not the bill — the column. No PSM. No RMP. No CalARP. No RAGAGEP audits. No RETA-certified hiring. No 2 a.m. leak calls. No more EPA settlements. Same throughput. Same family operation. Same brand.
Be brutal with my numbers · it's still wild
Sizing pulled from public facility footprint + the 2021 EPA settlement record. Numbers tighten once you give me your real installed kW and 12 months of bills. The NH₃-burden range below has a wide low/high band on purpose — the exact number is yours, we can land it together in an hour with your insurance broker and your PSM contractor on the line. · Decision-maker on file: P.J. Mecozzi · President (documented EPA settlement 2021 ($131K, inadequate NH₃ mitigation)).