Need to return call by / at/between and . Signature: ___________________________ 

Project No.: 0172.07.005.506 DISTRIBUTION 

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Project Name: 304(m) Annual Review 

TELEPHONE CALL RECORD 

 Outgoing Call 

Date: 8/27/2010 Time: 2:30 PM EST 

Company Name: Oxea Bay City Plant (TX0006017) 

Contact Name: Sylvia Martinez, Oxea Bay City Plant 

Phone No.: 979-241-4000 

Name: Lauren Wingo Eastern Research Group, Inc. 

GENERAL SUBJECT : Oxea Bay City Plant’s 2008 Chlorine and Flow Data in DMR 

 

TOPICS DISCUSSED AND ACTION TAKEN 

I called Oxea Bay City Plant on August 25, 2010 at 3:00 pm and left a message with Ms. Sylvia Martinez 

indicating that I was calling regarding the 2008 chlorine and flow DMR data for outfall 001. 

Ms. Martinez returned my call at 4:30 pm on August 25, 2010. Ms. Martinez indicated that the flow rate is 

measured at the final outfall for 001, but the chlorine is measured at a different location. She indicated that the 

flow rate where the chlorine was measured was different than the final flow rate. I reviewed the chlorine and 

flow data with Ms. Martinez (see Table 1 below). She verified all of the chlorine concentrations for outfall 001 

in the 2008 DMR. She also indicated that in 2008 the plant had problems with the analyzer that controls the 

chlorine feed, so higher concentrations may have been a result of the analyzer problems. Ms. Martinez believed 

the chlorine detection limit was 0.01 mg/L. Ms. Martinez said she would speak with other staff at the facility 

about any notes on the 2008 DMRs and would see if the plant measured flow at the location where chlorine is 

monitored. 

Ms. Martinez called at 5:20 pm on August 25, 2010 and left a message saying that she will be out of the office 

tomorrow but that I could contact Gladys and Joseph, also of Oxea Bay City Plant, to discuss the follow-up 

questions. 

I called Joseph from Oxea Bay City Plant on August 26, 2010 at 11:00 am while Ms. Martinez was out of the 

office. Joseph mentioned that there were problems with the Honeyhoe sewage treatment facility in 2008, 

although it was uncertain what those problems were. Joseph explained that the effluent from Honeyhoe feeds 

into effluent from other process wastewater sources and is sent to the cooling pond. Joseph indicated that outfall 

001 does feed into the river and is a commingled stream. 

I left a message for Ms. Martinez August 27, 2010 in the morning and she returned my call at 2:30 pm the same 

day. Ms. Martinez, along with Gladys, explained that Honeyhoe is the name of the domestic sewage treatment 

plant. Ms. Martinez indicated that effluent from Honeyhoe flows into two equalization tanks at a flow rate of 

approximately 28 gpm. She stated that other process wastewater is also sent to the equalization tanks at a flow 

of approximately 140 gpm. Ms. Martinez described that in the equalization tanks, much of the chlorine is eaten 

up by microbes. From there, flow travels into vessels 1214 and 1215, Ms. Martinez explained. She noted that all 

of the net flow is sent to the facility’s cooling pond and recirculated for use. 

Ms. Martinez then explained that Oxea Bay City Plant’s NPDES permit requires chlorine to be measured at the 

Honeyhoe plant, not at Outfall 001, and read part of the permit language, which states that chlorine be measured 

at the “outlet from the clarifier.” She explained that the chlorine measured at Honeyhoe is not discharged 
Need to return call by / at/between and . Signature: ___________________________ 

because it is re-circulated through the cooling pond, but that the permit allows for effluent from Honeyhoe to be 

rerouted and discharged from outfall 001, if necessary. Ms. Martinez also read the permit requirements for how 

frequently chlorine should be measured, but this information was not recorded. Ms. Martinez indicated that the 

State permitting authority may have not fully understood that the Oxea Bay City Plant re-circulates most of its 

wastewater through the cooling pond. 

Table 1 – Oxea Bay City Plant’s 2008 Chlorine and Flow Data in 

DMR 

Monitoring Period Date 

DMR 

Loadings Tool 

Chlorine 

Concentration 

(mg/L)

DMR Loadings 

Tool Flow 

(MGD) 

31-Jan-08 45 1.676 

29-Feb-08 37.5 1.77 

31-Mar-08 16.3 1.64 

30-Apr-08 5.9 1.488 

31-May-08 37.5 1.35 

30-Jun-08 1.6 0.989 

31-Jul-08 0.1 0.989 

31-Aug-08 85 1.102 

30-Sep-08 3 1.073 

31-Oct-08 0.1 1.416 

30-Nov-08 12 1.057 

31-Dec-08 15 1.018