Laserfiche WebLink
STATE OF CALIFORNIA - Environmental Prot Agency • PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION ENVIR"v F <br /> 3443 Routier Road, Smite A if i e <br /> Sacramento, CA 9582-3098 P <br /> PHONE: (916) 255-3000 ^`D <br /> n <br /> FAX: (916) 255-3015 Q 6 G <br /> 4 October 1996 <br /> Mr. Nick Nickerson <br /> Unocal <br /> 2000 Crow Canyon Place, Suite 400 <br /> San Ramon, CA 94583 <br /> QUARTERLY MONITORING REPORT.• 1905 N. BROADWAY, STOCKTON <br /> Thank you for submitting the quarterly monitoring report for the June 1996 sampling event at the former <br /> PureGro/Brea Ag facility at 1905 N. Broadway Avenue in Stockton. The report is nicely written, and the <br /> hydrograph figure helps to interpret the data. After reviewing the report, I have the following comments <br /> and/or questions: <br /> 1. Table 2 needs to be updated to include the results of the March 1996 sampling event. <br /> 2. The text states that 3.6 mg/1 NO3 N was detected in MW-7, while Table 2 shows that 16 mg/I was <br /> detected. Which is correct? <br /> 3. In Table 2, the entry for 1,2-DCP detected in MW-2 is "54 (+5.0)"? What's this mean? <br /> 4. The last paragraph on page 6 states that MW-8 appears to be influenced by local irrigation pumping. <br /> What is the basis for this statement? Are any of the other monitoring wells impacted? <br /> 5. Split samples were collected in June, and submitted to two different laboratories. The labs reported <br /> significantly different results for several of the chemicals. Additional split samples are necessary to <br /> determine why this difference exists. Unfortunately, since the monitoring report was not submitted in <br /> time, it was not possible to collect splits during the September sampling event. Therefore, splits will <br /> be required during December's groundwater sampling. <br /> 6. In the future, quarterly monitoring reports must be submitted to the Board no later than 15 days before <br /> the start of the next quarter (i.e., the September report is due by 15 November and the December <br /> report is due by 15 February). <br /> The answers to the above questions and the updated table can be included in the Third Quarter 1996 <br /> monitoring report. If you have any questions, I can be reached at (916) 255-3104. <br /> WENDY WYELS <br /> Ag Regulatory Unit <br /> Mr. John Rapp, Sierra Pacific Groundwater Consultants, El Dorado Hills <br /> Mr. Jan Wagoner, Unocal, West Sacramento <br /> Mr. Mike Infurna, San Joaquin County Environmental Health, Stockton <br />