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T APR 3 0 1993 � <br /> t O <br /> j;jRN :rNt�CENTAL i IEALTH �J <br /> CONDOR EARTH TECHNOLOGIESyllb � <br /> 1125 No. Golden State Blvd. 21663 Brian Lane <br /> Suite H P.O. Box 3905 <br /> P.O. Box 3448 Sonora, CA 95370 <br /> Turlock, CA 95381 (209)532-0361 <br /> (209)668-9234 FAX(209)532-0773 <br /> April 28, 1993 FAX(209)668-9248 <br /> Wendy Wyels <br /> Ag Regulatory Unit <br /> CRWQCB-Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> RE: PureGro/Brea Soil and Groundwater Investigation <br /> 1905 N. Broadway, Stockton, San Joaquin County, CA <br /> Dear Ms. Wyels: <br /> Thank you for your letter of 26 April 1993 regarding the amendment to the Soil <br /> and Groundwater Investigation Work Plan for the PureGro/Brea facility in <br /> Stockton. Please make the following change to my letter of 19 April 1993. <br /> The first full paragraph (first bullet item) on page 3 should be replaced with <br /> the following: <br /> • AGREEMENT: Initial groundwater samples will be analyzed for 1,2- <br /> dichloropropane (1,2-DCP) by EPA Method 601, for nitrate+nitrite <br /> by EPA Method 300, for total Kjeldahl nitrogen (TKN) by EPA Method <br /> 351.3, for total petroleum hydrocarbons quantified as diesel (TPH- <br /> D) and for total petroleum hydrocarbons quantified as gasoline <br /> (TPH-G) by EPA Methods 3510 and 5030, respectively. <br /> The information regarding nitrate+nitrite and TKN was inadvertently omitted <br /> from the 19 April letter. I apologize for any confusion the omission may have <br /> caused. Thank you for bringing it to my attention. <br /> Work is scheduled to commence at the PureGro Brea site at 7:00 a.m. on <br /> Tuesday, May 4, 1993. <br /> Resp&I <br /> fully submitte , <br /> Gail L. Holmes <br /> Project Geologist <br /> cc: Nick Nickerson, UNOCAL <br /> Paul Cort, E&E <br /> James James, E&E <br /> Jan Wagner, UNOCAL/PureGro <br /> Bob Mercer, CPS <br /> Donald Bishop, CONDOR <br /> Michael infurna, San Joaquin County EHD <br /> PGR0:Dnoc1WP2.Adm <br /> ENVIRONMENTAL GEOLOGICAL ENGINEERING GEOTECHNICAL <br />