HomeMy WebLinkAboutPRR26585 Murugesan - WTP data
Otta, Kaitlin
Maheshwar Murugesan <mahesh@effluent.ai>
Sent:Monday, November 2,
To:CityClerk
Subject:Public records request: City of San Luis Obispo
Good morning,
I hope this note finds you well. I know records requests land on desks that are already full, so thank you
in advance.
My name is Mahesh Murugesan, and I work at a small company called Effluent. We build software that
helps wastewater treatment plants with day-to-day operations, energy use, and maintenance. To do that
well we need to learn from how real plants actually run.
Pursuant to the California Public Records Act (Gov. Code § 7920.000 et seq.), I would like to request
copies of the following records concerning City of San Luis Obispo. Items 1 through 4 cover July 1, 2023
through June 30, 2026. Items 5 and 6 cover only the most recent twelve months, July 1, 2025 through
June 30, 2026, to keep them small. If three years is too much to pull together, one year (July 1, 2025
through June 30, 2026) for every item works well for me too. If the agency operates more than one
treatment facility, please apply this request to the facility handling the largest volume of wastewater; I
am glad to confirm scope by return email if that is quicker for your office. And if the agency does not
operate a wastewater treatment facility at all, just let me know and I will withdraw the request with
apologies for the detour.
1. Electricity bills or usage statements for the treatment plant, showing monthly kWh and demand by
meter or account, plus any submetering reports for aeration blowers or major pumps.
2. Chemical usage records: daily or monthly chemical feed or dosing logs (for example chlorine,
hypochlorite, bisulfite, alum, ferric, polymer, caustic) and chemical delivery records.
3. Operator logs: daily or shift logs kept by plant operators, including any records of process changes or
setpoint adjustments.
4. Equipment run-hour logs and maintenance work-order history for plant process equipment (for
example blowers, pumps, clarifiers, and digesters), in the spreadsheet or database export the plant
already produces.
5. Alarm and event history: the routine alarm summary or event log exports operators already generate,
showing date, time, point description, and alarm text.
6. Process historian data exports at hourly resolution or finer, or the finest interval the plant already
exports, for recorded process values such as influent and effluent flow, dissolved oxygen, ammonia,
nitrate, pH, mixed liquor suspended solids, blower airflow, and sludge flows, together with the list of tag
or point names and their descriptions. This is the item most valuable to us.
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To be clear about scope, I am asking only for recorded operating results, usage, and logs. I am not
requesting control system configurations, network or architecture documentation, IP addresses, access
credentials, vulnerability information, or any record whose disclosure could bear on the security of plant
systems. If any part of this reads as touching those, please treat it as excluded and produce the
remainder.
Wherever these are already captured in a report or export your agency produces in the ordinary course,
that existing file is exactly what I am asking for. Please send it as-is rather than compiling anything new.
Rolling production is very welcome: releasing whatever is easy now and the rest later is better for me
than waiting for everything at once.
If the agency operates more than one treatment facility, please apply this request to the facility handling
the largest volume of wastewater; I am glad to confirm scope by return email if that is quicker for your
office. And if the agency does not operate a wastewater treatment facility at all, just let me know and I
will withdraw the request with apologies for the detour.
I would appreciate electronic copies in the format your agency already holds them (.xlsx, .csv, or
database export) rather than scans, to the extent applicable law permits. If any portion is exempt, please
produce the non-exempt portions and identify the exemption claimed. If the estimated cost would
exceed $100, please contact me first so I can decide how to proceed.
Thank you sincerely for the time this takes. If there is a simpler way for me to ask that would save you
effort, I am glad to adjust.
Warm regards,
Mahesh Murugesan
Effluent, Inc.
mahesh@effluent.ai
(919) 717-0390
131 Continental Dr, Ste 305, Newark, DE 19713
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