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.9 r 0W. M—W <br /> _5 <br /> �N OEM <br /> 'T <br /> SNA NATER WORK CORP. <br /> FMINDUSTRIES <br /> NA <br /> WATER try GARP. <br /> a. January 21, 1991 jp <br /> 2 5 rye <br /> j, <br /> Ms. Diane Hinson <br /> San Joaquin county Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> FACSIMILE Stockton, CA 95201 <br /> Deliver facsimile to: <br /> ReQuarter Report-Tri valley Growers, 26200 <br /> ---------- : <br /> Company: < .IC <br /> C- Nowell Road, Thornton, CA. <br /> VAX Number: <br /> Phone Number: <br /> Dear Diane: <br /> Number Of P&90* (including cover): report updates the activities at Tri-Valley Grower's <br /> This letter Activities <br /> first quarter Of 1991- <br /> Sender; c-1, Thornton plant during the for dissolved <br /> during the quarter have included sampling <br /> t If all Sheets aze not transmitted clearly,, please hydrocarbons and monitoring of groundwater. <br /> call: in October, November and <br /> i Groundwater monitoring conducted foot <br /> (209) 838-3507 <br /> December showed the water table ascended approximately 1/2 <br /> groundwater contour maps <br /> Tn reply by Facsimile, please call; during the quarter (Table 1). The <br /> (Figures 1-4) show a consistent direction and magnitude of the <br /> This westerly direction <br /> (209) 836-2509 gradient (Table .1) during the quarter. <br /> I rs (Table 2). <br /> varies significantly compared to previous quarte <br /> t No discernible relationship between the gradient magnitude, <br /> gradient direction or water table elevation is apparent <br /> F groundwater system clearly responding to <br /> However, the shallow ,gfrom <br /> r <br /> influences other than natural seasonal recharge. Recharge <br /> irrigation or the effects of pumping in the area are probable <br /> factors. <br /> er samples were collected from the six <br /> wells on December <br /> Groundwat <br /> 20, 1990, for analysis of benzene, toluene, ethylbenzene, xylenes <br /> • hydrocarbons as gasoline (TPHG), by <br /> 01 and total petroleum <br /> (BTEX) Ig well, MW1 was <br /> EPA methods 8015/8020. in addition, monitoring <br /> C. & F. (Sampling <br /> e by EPA method 5520 <br /> d for oil and grease sample <br /> pumps in each well] . Applied Analytical <br /> was done using dedicated results <br /> r,PR 08 1991 <br /> (DOHS Cert. # 1211) performed the analyses. Laboratory <br /> of gasoline <br /> ue to show MW4 with moderate concentrations <br /> ­0NMENMAL HEAL7 continua were <br /> of <br /> ------------------hydrocarbons.----- -Low-...concen ---------- <br /> ------- trations...-- -gasoline hydrocarbons <br /> vM,7/SEr?Y10ES &j�d concent rations - <br /> 2, MW5, and MW6. oil and grease recorded in MW <br /> were below <br /> k . <br /> 1710 MAIN STREET <br /> ESCALON,CA 95320 (209)838-3507 <br /> a <br /> 2350-A WALSH AVENUE o SANTA CLARA,CA 95051 • (408)496-1249 <br /> 1714 MAIN SnMET • ESCA I-ON,CA 95320 • (209)933.3$V7 <br /> 2350LA WALSR AVENUE - SANTA CLAP A,CA 95051 (4(k?)49,5..1249 <br /> d�OD `i Otld3ltlPl 62-t1T 16, 60 ,8atj <br />