CITY OF POINT ARENA WASTEWATER
TREATMENT FACILITY
P.O. BOX 67
POINT ARENA, CA 95468 (707) 882-2700
DATE 01/24/2023
Mr. Ben Zabinsky
CRWQCB - North Coast Region
5550 Skylane Boulevard Suite A
Santa Rosa, CA 95403
Dear Mr. Zabinsky,
Here is Point Arena's 2022 annual report. The report includes summaries of monitoring data and system work. Also included is the annual flow meter certification.
The discharge limits for the plant are; B.O.D., Monthly Average of 90, Suspended Solids: Monthly Average 50, Daily Maximum 80: Settleable Solids: Monthly Average
0.1, Daily Maximum 0.2, Coliform Bacteria Monthly median Most probable number of 23, daily maximum 240. PH: Instantaneous Minimum 6.5 mg/L, Instantaneous Maximum
8.5 mg/L.
The Point Arena Treatment Plant was out of compliance in the following manner:
January 2022: The plant was in compliance of all discharge requirements.
February 2022: The plant was in compliance of all discharge requirements.
March 2022: The plant was in compliance of all discharge requirements. Except for on the 18th, we had a lab result come back at 1600 mg/L on our Coliform. I feel that the lab made a mistake on this test. We had nothing even close to this before and after April 2022: The plant was in compliance of all discharge requirements.
May 2022: The plant was in compliance of all discharge requirements.
June 2022: The plant was in compliance of all discharge requirements.
July 2022: The plant was in compliance of all discharge requirements.
August 2022: The plant was in compliance of all discharge requirements.
September 2022: The plant was in compliance of all discharge requirements.
October 2022: The plant was in compliance of all discharge requirements.
November 2022: The plant wasn't in compliance of all discharge requirements.
November gth, we had a 3500mg/L. TSS lab sample come back. I feel this was a lab error as all other samples was in compliance. All other samples was in compliance during this month.
December 2022: The plant was in compliance of all discharge requirements Except for on the 14" a TSS came back at 65mg/L a little over our daily limit. Our Monthly average was fine. All other samples was in compliance for the month 1, Joseph Wilson, am the current CPO at Point Arena WWTP.
Collections: We performed Collection System Cleaning; we jetted all the mainlines in the system. This is done two to three times yearly in order to reduce SSO's, also helps to assist in predicting when each section of the collection system needs to be serviced based on prior action and SSO history. We didn't have any SSO's in 2022. We replaced all old sewer laterals on Mill ST when Granite put in storm drain earlier in the year. The Laterals are ABS now. They were all the old two-foot sections of clay pipe.
Our I & I have reduced quite a bit since this was done. Our Engineer "SHN" did a complete study on our collection system. They had a camera crew camera all of what they could for this study. We plan to upgrade our mainlines in 2024 or 2025.
Treatment: Our treatment process has been working well. We were within all of our discharge requirements on all samples tested for the year but for one coliform test that exceeded our daily limit. We feel this was a Lab error, as all others were compliant.
We have not had any issues since. We also had two TSS samples come back over our daily limit, first one was November 9, 2022 TSS was 3500mg/L. This has to be an error as we don't have that in our influent TSS. The second one was on December 14, 2022, TSS was 65mg/L. this is correct. We put new Mixers in the Influent lagoon and pulled the surface aerators. Now we are only aerating the secondary. This way we can feed the microorganisms as they enter the system and then get aerated in the secondary as they die off before leaving to perc. Ponds. This should cut down on sludge accumulation and be a more effective process.
Discharge: The treatment plant's effluent is pumped to four percolation ponds south of the treatment plant. These ponds are maintained by yearly breaking up of the sand and gravel mixture in the bottom of the ponds with a single tooth harrow that breaks the bottom to a depth of 2'6". We performed this routine maintenance on the ponds in May, June and July of 2022
Soldani Spring box has no flow; if and when it starts to flow, we should resume I certify under penalty of law that this document and all attachments were prepared under my direction in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted, is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment for knowing violations.
Respectfully,
Joseph C. Wilson (CPO)
fight bett
freal
Paul Anderson
City Manager
City of Point Arena
ORDER No. R1-2022-0015
_TECHNOLOGIES
P.O. Box 845 • 15083 Canyon Seven Road Forestville, California 95436-0845 City of Point Arena
P.O. Box 67
Point Arena, CA 95468
January 23, 2023
Re: Treatment plant influent calibration
With the assistance of the plant operators, we zeroed the flowmeter by stopping flow, and used the false-target to insert into the throat of the flume to test 100% reading.
This letter is sent to document the fact that your Greyline Instruments SLT 5.0 ultrasonic flow transmitter was set up and programmed correctly for the measurement installation. In conjunction with the 3" Parshall flume the system will accurately measure 0 to 1.02 MGD.
The Honeywell DR 4300 chart recorder was found to be within +/- 1 %. The display section of the recorder indicated:
0.000 @ 3.99mA or 0%, 0.500 @ 12.00mA or 50% 0.999 @ 20.00mA or 100% Again well within the manufacturers specifications.
If you have any questions or concerns, please do not hesitate to email or call me.
Regards,
J.A. Falejczyk
CSS-Technologies.com
Voice: 866-869-3488 FAX:707-885-1078
http://CSS-Technologies.com