Laserfiche WebLink
VALT <br /> GROUND ZERO ANALYSIS, INC. <br /> 2291 W. March Lane, Suite 127D <br /> Stockton, California 95207 <br /> Telephone: (209) 952-3481 <br /> Facsimile: (209) 952-9892 <br /> July 18, 1996 <br /> Mr. Michael Infurna <br /> San Joaquin County PHS/EHD <br /> P.O. Box 0388 <br /> Stockton, CA 95201-0388 <br /> Subject: Second Quarter 1996 Monitoring and Sampling Report <br /> Former Steve's Rentals, 275 Grant Line Road, Tracy, California <br /> Dear Mr. Infurna: <br /> This letter report presents the results of the Second Quarter 1996 groundwater monitoring and <br /> sampling at the subject site (Figure 1). <br /> Groundwater monitoring was conducted on June 28,1996 on wells MW1, MW2, MW3. The <br /> groundwater elevations across the site increased an average of 0.12 feet since the last monitoring <br /> event in June 1995 (Table 1). Figure 2 depicts the groundwater flow direction and hydraulic <br /> gradient on June 28, 1996. Flow direction at the site was generally to the northeast at a gradient <br /> of approximately 0.003 ft/ft. Monitoring data are included in Attachment A. <br /> On June 28, 1996 after purging at least three casing volumes of groundwater and the <br /> stabilization of temperature, pH, and electrical conductivity, samples were collected from each <br /> well in accordance with the site Well Sampling Protocol. Samples were analyzed by Argon <br /> Laboratories (FLAP#1873)of Ceres, California for benzene, toluene, ethylbenzene and xylenes <br /> (BTEX) using EPA method 8020 and total petroleum hydrocarbons as gasoline (TPHg) using <br /> modified EPA method 8015. <br /> TPHg and BTEX were not present above laboratory method detection limits in samples collected <br /> from wells MWl, MW2, and MW3, which is consistent with historical results. Laboratory <br /> analytical data are summarized in Table 2. Laboratory data sheets and chain of custody <br /> documentation are included in Attachment B. <br /> *ft.,r <br /> g round zeXpest&=.03 512gm 1996 <br />