Laserfiche WebLink
A.. <br /> _r An <br /> ��O I 'L a N J1 <br /> Aicific Giou dwater Consultants, Inc. <br /> PM 1, 58 HYDROGEOLOGISTS&GLOLOGISTS <br /> it <br /> October 18, 1995 �u <br /> Mr. Michael Infurna, Senior Registered Environmental HeAlth Specialist <br /> San Joaquin County Public Health Services <br /> Environmental Health Division, Unit 4 <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: Analytical Test Results from Ground-Water Sampling at i Geo.F. Schuler, Inc, 1705 North <br /> Broadway Avenue, Stockton, California; and Third-Quarter 1995, Quarterly Monitoring <br /> Report, Former PureGro/Brea Facility, 1905 North Broadway Avenue, Stockton, PureGro <br /> Site No. 771165, Unocal OrderlContract No. 3440.2, li;S' .�'ra-Pacific Project No. 94-055.04 <br /> Dear Mr. lnfurna: <br /> On September 18, 1995, Sierra-Pacific Groundwater Consultants, (Sierra-Pacific) collected a <br /> suite of ground-water samples from a solitary two-inch monitoring!well (MW-11) located at Geo. <br /> i: - 1� <br /> F. Schuler, Inc., 1705 North Broadway Avenue, Stockton, using a Grundfoss submersible pump in <br /> accordance with Sierra-Pacific (EPA) standard practicespp ell'dix A). Water samples were <br /> collected in 1000 ml amber-colored glass bottles,40-m1 VOAs::acidified with hydrochloric acid, 1000 <br /> in]plastic bottles acidified with sulfuric acid, and 500 ml non-preserved plastic bottles. No sampling <br /> difficulties were encountered. The water samples were placed in an iced cooler and immediately <br /> transported to Sequoia Analytical Laboratories, Inc. Samplps were tested for Total Extractable <br /> Petroleum Hydrocarbons (TEPH)by EPA Method 8015,Tota'I Purgeable Petroleum Hydrocarbons <br /> (TPPH) by EPA Method 8020, BTEX (benzene, toluene, ethyl-b8 ene, and xylene) compounds <br /> by EPA Method 8020, and Volatile Halogenated Hydrocar on Compounds (including 1,2-DCP) <br /> by EPA Method 601. Water samples were also tested for Total Kjeldahl Nitrogen (TKN) and <br /> nitrates. <br /> The ground-water samples from MW-11 contained 18 mg/l !!nitrat6s, which is believed to be the <br /> regional background concentration of nitrates in the uppermost saturated zone. No TKN <br /> compounds were detected. No petroleum or volatile halogenated hydrocarbon compounds (eg. 1,2- <br /> DCP) were detected (Appendix C). The ground water samp 11 0,s from MW-11 were relatively clear <br /> and odorless. No oily sheen was observed. <br /> MW-11 appears not to have been surveyed. Accordingly, we;: did not use the MW-11 water level <br /> to establish a ground water elevation point for our potentio6etric grid.' Other water level data <br /> indicate that ground water flows southwest under the Geo. F. Schuler, Inc. site (Figure 3). <br /> (9161933-1468 <br /> 4911 Windplay Drive,Suite 4 El Dorado Hills,California 95762 (916)933-3197 FAX <br />