GEOTECHNICAL | ENVIRONMENTAL | MATERIALS
October 5, 2023
Project No. 3865-SD
Las Posas, LLC
c/o Avenue Secured Capital Group
2555 Locust Street
San Diego, CA 92106
Subject: Statement of Clarification Regarding Suspected UST A Portion of Assessor’s Parcel Number (APN) 219-16 2-57-00 225 North Las Posas Road
San Marcos, California
References: See Page 3
Dear Mr. Tate:
In accordance with your request, GeoTek, Inc. (GeoTek) has prepared this letter of clarification regarding the Underground Storage Tank (UST) previously suspected to exist within the subject project (see figure 1).
On December 14, 2022, Hal Hays Construction, Inc. w as contracted by others (property owner of 225 N. Las Posas Road), to evaluate the an omaly identified by Stantec’s Phase II investigation. A Professional Geologist and an Environmental Professional from GeoTek was on site during the field exploration. The excavation was performed with a conventional rubber- tired backhoe with a 24-inch wide, smooth edge, bucket. The excavation was approximately six feet long and three feet wide. Shallow refusal by granitic rock (Tonalite) was encountered at an approximate depth of two to three feet below grade. A weathered core stone was encountered at the approximate location of the anom aly identified in Stantec’s Phase II investigation. A second core stone was encountered approximately six feet north of the recorded anomaly. To further evaluate a potential UST, the excavation was lengthened to the north and south for a total linear excavation lengt h of approximately twelve feet. North and south of the excavation, core-stones extruded from the subsurface. The excavation encountered a thin layer of topsoil over weathered Tonalite and encountered non-rippable rock at a depth three feet, but became as shallow as one foot above the core-stones.
Las Posas, LLC Page 2
Environmental Statement of Clarification Project No. 3865-SD San Marcos, California October 5, 2023
Conclusion
Evidence is not present to conclude the 550-gallon UST is present on the site.
GeoTek
recommends no further environmental investigation is necessary.
LIMITATIONS
The comments are professional opinions that are lim ited to the extent of the available data.
These opinions have been derived in accordance with current City/County/State standards of practice and no warranty is expressed or implied. Standards of practice are subject to change with time.
Respectfully submitted,
GeoTek, Inc.
Christopher D. Livesey
CEG 2733, Exp. 05/31/23
Vice President
Attachments: Figure 1 – Site Location Map
Distribution: (1) Addressee via email
Las Posas, LLC Page 3
Environmental Statement of Clarification Project No. 3865-SD San Marcos, California October 5, 2023
REFERENCES
GeoTek, Inc., 2023, Due Diligence Environmental Review, A Portion of As sessor’s, Parcel Number (APN) 219-162-57-00 , 225 North Las Posas Road , San Marcos, California, Project No. 3865-SD, dated January 26, 2023.
Kennedy, M.P., Tan, S.S., Bovard, K.R., Alvarez, R. M., Watson, M.J. and Gutierrez, C.I., 2007, “Geologic Map of the Oceanside 30x60-Minute Quadran gle, California,” California Geological Survey, Regional Geological Map RGM-2, scale 1:100,000.
Stantec, 2021, “Phase II Environmental Site Assessm ent, 225 North Las Posas Road, San Marcos, California 92069,” Project No.: 185805035, dated March 23.
Terracon, 2019, “Phase I Environmental Site Assessm ent, AT&T: San Marcos, 225 North Las Posas Road, San Marcos, San Diego County, Californi a,” Terracon Project No. 60197159, dated May 10.
1384 Poinsettia Avenue, Suite A, Vista, CA 92081
(760) 599-0509 (phone) / (760) 599-0593 (FAX)
GEOTECHNICAL | ENVIRONMENTAL | MATERIALS
10/05/2023
FIGURE 1
SITE LOCATION
225 N LAS POSAS RD.
SAN MARCOS, CALIFORNIA
Project No.: Report Date: Drawn By:
3865-SD CDL
N
100 feet
Approximate Site
Location