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Diamond Pet Food Processors of Ripon California LLC January 31,2013
<br /> Combined Annual and Second-Half 2012 Groundwater Monitoring Report Page 1 of 6
<br /> INTRODUCTION
<br /> This report presents the combined annual summary report and the results of second-half 2012
<br /> groundwater monitoring performed by Lawrence &Associates (L&A)between July 9 and
<br /> October 2, 2012, at Diamond Pet Food Processors of Ripon California LLC (DP), 942 South
<br /> Stockton Avenue, Ripon, California(Figure 1). Groundwater monitoring consisted of
<br /> measuring the depth to groundwater in all monitoring wells on July 9, 2012 (3rd quarter), and
<br /> October 1, 2012 (4th quarter). On October 2, 2012, monitoring wells OB-1, OB-2, OB-4, OB-5,
<br /> OB-7, OB-8, OB-11, OB-17, OB-19, OB-21, OB-22, OB-24, OB-25, OB-26, OB-28, PW-6 and
<br /> PW-7 were sampled for pH, electrical conductivity(EC), total dissolved solids (TDS), nitrate as
<br /> nitrogen,boron, calcium, chloride, magnesium, manganese, nitrogen, potassium, sodium,
<br /> sulfate, total alkalinity (including alkalinity series), and hardness. Iron was inadvertently not
<br /> included in the analyte suite.
<br /> Table 1 (following text)presents well descriptions including well names, casing diameter,
<br /> reference point elevation, total depth, screened intervals, and aquifer unit (s).
<br /> On October 4, 2012, the California Regional Water Quality Control Board, Central Valley
<br /> Region(CVRWQCB ) adopted Waste Discharge Requirements (WDR) Order No. R5-2012-
<br /> 0105 for the DP site (Attachment A). The new WDR reflect the DP site's conversion to a pet
<br /> food manufacturing facility, and rescinds and replaces WDR No. 5-01-148, issued to Fox
<br /> Valley Corporation on June 14, 2001,when the site was a paper manufacturing facility.
<br /> COMPLIANCE RECORD
<br /> DP was in compliance with all the monitoring and reporting requirements and effluent discharge
<br /> limitations set forth in WDR Order No. 5-01-148 between January and September 2012.
<br /> With the following exceptions, DP was in compliance with WDR Order No. R5-2012-0105
<br /> between October and December 2012:
<br /> 1. The November 2012 effluent sample had a pH of 9.0, exceeding the allowable range of
<br /> 6.5 to 8.5 pH units for effluent pH (Table 6).
<br /> 2. Daily and monthly influent flow logs were incomplete during October and November
<br /> because flow meters had not yet been installed on the individual effluent and dilution
<br /> water lines flowing into the Clarifier. Influent monitoring reports are presented in
<br /> Attachment B.
<br /> 3. Effluent(discharge from ASB-2) samples were not analyzed for boron, calcium,
<br /> chloride, iron, magnesium, manganese, nitrogen, potassium, sodium, sulfate, total
<br /> alkalinity (including alkalinity series), and hardness. Effluent monitoring reports are
<br /> presented in Attachment C.
<br /> 4. Iron was not included in the annual analyte suite for groundwater samples (Table 3).
<br /> 10107.02 Task 8 Lawrence&Associates
<br /> W:ICLIENTYDiamond Pet FoodsW 10107.01-Groundwater Monitoring)Groundwater Monitoring12012WQ201214TH QUARTER Annual
<br /> 2012.docx
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