Laserfiche WebLink
L °� ecyC <br /> 1617 North Calx iia Street <br /> = 9 February 16, 1994 <br /> r"'D(Y Page 3 I <br /> 4.0 feet, a PID reading of 78 parts per million or ppm was detected from the soil <br /> boring cuttings. A strong solvent odor was also noted from this depth. <br /> All soil cuttings were placed and properly secured into one (1) 55 gallon drum on- <br /> Site. The soil boring location map and soil boring'logs are included in the appendix <br /> of this report. <br /> Conclusions and Recommendations <br /> Based on the limited field observations completed by NWE in correlation with the <br /> geophysical survey completed by NORCAL, it appears that a UST is not present <br /> within close proximity of the geophysical anomalies delineated by NORCAL. It <br /> appears that these anomalies are indicative of a cast iron pipe line or remnants of a <br /> similar function. i <br /> Organic vapors were detected (78 ppm) at a depth of 4.0 feet in soil boring B-7, <br /> which is near the southern portion of the anomalies. These vapors appeared to have <br /> an odor similar to that of solvents. The vertical jiand lateral extent of the possible <br /> contamination could not be determined from this investigation, which is beyond the <br /> scope of services. The origin of these organic vapors could not be ascertained at <br /> the time of the on-Site investigation. NWEI therefore recommends further <br /> investigation on this matter. It should be noted that an additional investigation of <br /> such concern would require notification of the lead regulatory agency. <br /> LIMITATIONS <br /> Conclusions reached as the result of analysis done on suspect materials are not <br /> 100% accurate. Error can occur in two forms: 11sampling error and non-uniform <br /> distribution of contaminates, if present, in 'materials that otherwise appear <br /> homogeneous. Northwest Envirocon conclusions are based on limited field <br /> observations and other pertinent information previously acquired prior to this <br /> C, investigation. <br /> If you have any questions,.or if we can be of further assistance,please call <br /> us at (916) 649-3570. <br /> Sincerely, <br /> L <br /> V� <br /> Jan R. Rutenbergs, REA.#04553 <br /> Project Geologist <br /> encl. <br /> I <br />