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MEMORANDUM CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION 3443 Routier Road, Suite A Sacramento, CA 95827-3098 Phone: (916) 361-5600 ATSS Phone: 8-495_56)0 70: Mr. Joe Da Silva FROM: Louis F. Pratt Land and Water Resource Specialist E + DATE: 2 April 1991 SIGNATURE: t ± - SUBJECT: COMMENTS ON REPORT DATED 21 MARCil 1991 In a report dated 21 March 1991, Bart Barringer submitted a written spill report of behalf of Joe Da Silva. This report is required by Monitoring and Reporting Order No. 90-301. Several statements in the report were not consistent with the information obtained during the compliance inspection (complaint investigation). The inconsistencies are discussed below: Page 1, Paragraph 3, states that the pond was checked and found intact" at 6:00 p.m. on Thursday, 7 March 1991. Mosquito Abatement District personnel informed me that the discharge was in progress on 7 March 1991 prior to 6:00 p.m. Page 1, Paragraph 4, states that there is not a great amount of 1 i qu i d waste in the small lagoon (pond). The pump in the main storagepond picks u wastewater, flushes it through freestalls, and returns it to the smll pondp The outlet from the small pond was apparently blocked and this resulted in the flush water overflowing the pond. Therefore, the volume discharged was a function of the amount of wastewater that entered the small and after was full, p it Page 2, Paragraph 1, states that most of the 1 iquid flowed in an easterly t direction. The slope of the area adjacent to the pond is east to west. The overflow from the pond was on the south end of the pond. The ditch into which the overflow discharged drains to the west, then turns south toward Fairbanks Lateral. Page 2, Paragraph 3, states that the ditch (assuming Fairbanks Lateral) to the west had been closed off to prevent flow of any liquid waste. No such blockage was observed during the 9 March 1991 inspection. In fact, wastewater was observed flowing from the dairy to Temple Creek via Fairbanks Lateral . Page 2, Paragraph 7, s to tes tha t a 11 o f the 1 i qu id was to which leaked into the ditch was completely removed. The Regional Board staff inspection revealed wastewater flowing in a continuous stream from the point of ' discharge to Temple Creek. Evidence also indicates that the wastewater had been flowing in Temple Creek at least to Van Allen Road. The discharge into Fairbanks Lateral had been underway between 7 March 1991 and 8 March 1991. before any measures were taken to abate it. f VIRC-9