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MECHANICAL CONTRACTORS <br /> SINCE 1947 <br /> . k <br /> OCT 0 2 1992 <br /> ENVIRONNIENTAL HEALTH September 30 , 1992 <br /> PERMIT/SERVICES <br /> Michael M. Coll ns <br /> San Joaquin Cou ty Public Health Services <br /> Environmental H alth Division <br /> P . O. Box 2009 <br /> Stockton , CA 9' 201 <br /> RE: 1607 Turnp ke Road , Stockton , CA . <br /> Dear Mr . Collin <br /> This lette is notify you of our decision to proceed <br /> with the follow ng work , to be performed by Resna Idustries . <br /> Resna Indu tries will verify groundwater quality beneath <br /> the site , and w -11 resample the site ' s monitoring wells . After <br /> measuring stati fluid levels , at least three casing volumes <br /> of water will b purged from each well to allow for the collection <br /> of a representa ive groundwater sample . Physical parameters <br /> (pH , conductivi y , temperature) will be monitored and allowed to <br /> stabilize prior to sample collection . Groundwater samples will <br /> be collected us ng a disposable bailer with a bottom emptying <br /> device , labeled placed on ice , and shipped under chain-of- <br /> custody to a State-certified analytical laboratory . Samples <br /> will be analyzei for benzene , toluene , ethylbenzene , xylenes <br /> (BTEX) and totaL petroleum hydrocarbons as gasoline (TPHG) <br /> using EPA metho s 8020 and modified 8015 , respectively . <br /> If you have any further questions regarding the above <br /> mentioned work , please feel free to contact our office . <br /> rely , <br /> AGreg ry A.incGau <br /> Owne <br /> GAG/lah <br /> 1607 TURNPIKE ROAD P.O. BOX 1254 STOCKTON, CALIFORNIA 95201 <br /> PHONE(209)4664601 LICENSE#085895 FAX(209)466-2639 <br />