Item-17-Reso-78-Wreden-repair — Fairfax City Council, August 3, 2022

AGENDA ITEM #17

TOWN OF FAIRFAX

STAFF REPORT
August 3, 2022
TO: Mayor and Town Council
FROM: Heather Abrams, Town Manager
SUBJECT: Adopt Resolution Authorizing Notice Inviting Bids for 78 Wreden Avenue Storm Damage Repair, Town Project No. 51-826
_________________________________________________________________________________

RECOMMENDATION
Adopt the attached resolution authorizing notice inviting bids.

DISCUSSION
An existing concrete retaining wall which supports the downslope side of the roadway near 78 Wreden Avenue was damaged during a period of severe storms and heavy rainfall in February 2019. Erosion and instability within the swale below the wall resulted in undermining and loss of foundation support for the structure. The planned repair consists of constructing a new reinforced concrete retaining wall downslope of the existing wall. The new wall is approximately 35-feet-long, up to about eight feet in retained height and will be supported on drilled shaft foundations. The new wall will be constructed a few feet downslope of the existing wall and will provide additional lateral support for the structure. Details of the proposed retaining wall and related improvements are provided in the attached project plans.

As there is another similar repair project near 378 Scenic Avenue, staff will consider combining the two projects into a single bid solicitation in order to realize more competitive bids and streamline construction contract oversight.

FISCAL IMPACT
The engineer’s construction cost estimate for this project is $240,000. Actual project costs are unknown until the contractor bids are opened. Funding for this project was not appropriated in the current (FY2022-23) adopted CIP budget A budget appropriation will be requested when the Council considers contract award in September.

ATTACHMENTS
A. Resolution
B. Plans

ATTACHMENT A
RESOLUTION 22-__

A RESOLUTION OF THE TOWN COUNCIL OF THE TOWN OF FAIRFAX AUTHORIZING NOTICE INVITING BIDS FOR CONSTRUCTION OF 78 WREDEN AVENUE

STORM DAMAGE REPAIR PROJECT
WHEREAS, construction of 78 Wreden Avenue Storm Damage Repair (“the Project”), was identified in the current adopted budget; and
WHEREAS, delivery of the Project utilizing all of the appropriated funds requires that the Town invite formal bids as provided for in the Town Code and under the California Uniform Construction Cost Accounting Act of 1983; and
WHEREAS, the Project is categorically exempt from the application of the California Environmental Quality Act (“CEQA”) under Class 1 inasmuch as it involves the repair of an existing facility.

NOW, THERFORE, BE IT RESOLVED, that the Fairfax Town Council hereby authorizes issuance of notice inviting construction bids for the Project and authorizes the Town Manager to do everything necessary and proper to complete the bid package and notice the request for bids.

The foregoing Resolution was duly passed and adopted at a regular meeting of the Town Council of the Town of Fairfax, at a regular meeting held on the 3rd day of August 2022, by the following vote, to wit:

AYES:

NOES:

ABSENT:
_______________________________
Stephanie Hellman, Mayor
Attest: ___________________________
Michele Gardner, Town Clerk
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245 78 WREDEN AVE 102 WREDEN AVE 86 WREDEN AVE 18 MOUNTAIN VIEW RD 3 MANZANITA RD 70 WREDEN AVE LIMITS OF TOWN RIGHT-OF-WAY (E) DISTRESSED RETAINING WALL TO BE REPLACED BY (N) WALL DOWNSLOPE, SEE SHEET 3 Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

Suite 220
Novato, CA 94947
T 415 / 382-3444
F 415 / 382-3450
www.millerpac.com
A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED
Date Mark Description
Revisions
By
FILE: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg Date
Date
Date

TITLE SHEET & NOTES
1 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA
SAS
90% DESIGN SUBMITTAL 3/22/2021 RCA SCALE
0 10 20 40 FEET SITE LOCATION MAP (NO SCALE) PROPERTY MAP (SCALE: 1" = 20'-0") ABBREVIATIONS & SYMBOLS APPROX APPROXIMATELY (N) NEW BW BOTTOM OF WALL ELEVATION STD CALTRANS STANDARD DETAIL (E) EXISTING TW TOP OF WALL ELEVATION FT FEET IN INCH LF LINEAR FEET APPROX BORING LOCATION BY MILLER PACIFIC UCS MARIN CO. UNIFORM CONSTRUCTION STANDARDS CONC CONCRETE INDEX OF SHEETS SHEET NO. SHEET TITLE 1 TITLE SHEET & NOTES
2 SITE PLAN - EXISTING CONDITIONS
3 RETAINING WALL PLAN, PROFILE & SECTION
4 DETAILS
5 BORING LOGS
6 EROSION & SEDIMENT CONTROL SITE GENERAL 1. ALL CONDITIONS AND DIMENSIONS SHOWN ON THE PLANS SHALL BE VERIFIED BY THE CONTRACTOR. ANY DISCREPANCIES THAT REQUIRE CLARIFICATION OR REVISIONS SHALL BE BROUGHT TO THE ATTENTION OF THE ENGINEER BEFORE STARTING WORK. 2. THE CONTRACTOR SHALL POSSES A CLASS "A" LICENSE. 3. THE CONTRACTOR SHALL SUPERVISE AND DIRECT THE WORK AND SHALL BE SOLELY RESPONSIBLE FOR ALL CONSTRUCTION MEANS, METHODS, PROCEDURES, TECHNIQUES, SAFETY, AND SEQUENCE. 4. CONTRACTOR SHALL NOTIFY UNDERGROUND SERVICE ALERT PRIOR TO START OF ANY CONSTRUCTION. CONTRACTOR SHALL NOTIFY ALL PUBLIC OR PRIVATE UTILITY COMPANIES A MINIMUM OF 48 HOURS PRIOR TO COMMENCEMENT OF WORK ADJACENT TO EXISTING UTILITY LINES. 5. CONTRACTOR SHALL BE RESPONSIBLE FOR THE VERIFICATION OF ALL EXISTING UTILITIES IN THE FIELD. ANY UTILITIES DAMAGED BY THE CONTRACTOR SHALL BE REPAIRED BY THE CONTRACTOR AT THE CONTRACTOR'S EXPENSE. 6. TOWN OF FAIRFAX ENCROACHMENT PERMIT IS REQUIRED FOR ALL WORK, INCLUDING STAGING OF MATERIALS AND EQUIPMENT IN THE PUBLIC RIGHT-OF-WAY. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING AN ENCROACHMENT PERMIT IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. 7. THE CONTRACTOR SHALL COORDINATE WITH ENGINEER TO ESTABLISH THE RETAINING WALL LAYOUT PRIOR TO BEGINNING WALL CONSTRUCTION. 8. THE CONTRACTOR SHALL HAUL AWAY ALL UNUSED/EXCESS EXCAVATED MATERIAL OFF SITE FOR LEGAL DISPOSAL. 9. NO CONSTRUCTION MATERIALS, EQUIPMENT, DEBRIS OR WASTE SHALL BE PLACED OR STORED WHERE IT MAY BE SUBJECT TO WIND OR RAIN EROSION AND DISPERSION. 10. WORKMANSHIP TO BE PERFORMED IN ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS ALONG WITH 2018 CALTRANS STANDARD SPECIFICATIONS, MARIN COUNTY AND CITY OF SAUSALITO STANDARDS AND GENERALLY ACCEPTED CONSTRUCTION PRACTICES. SURVEY NOTES 1. TOPOGRAPHY BASED ON A FIELD SURVEY PERFORMED BY WILLIS SURVEYING. CONTOURS ARE SHOWN EVERY ONE VERTICAL FOOT. 2. THIS IS NOT A BOUNDARY SURVEY. THE LINE WORK SHOWN WAS COMPILED FROM RECORD INFORMATION ONLY AND AS SUCH IT SHOULD NOT BE REPRESENTED OR CONSTRUED AS ACTUAL ENTITLEMENT. 3. VERTICAL DATUM: USE WP1 AS A TEMPORARY BENCHMARK (TBM). WP1, A MAG NAIL SET IN THE DRIVEWAY, ELEVATION IS 242.82 FEET NAVD88 BASED ON STATIC GPS OBSERVATION AND PROCESSED BY NGS OPUS SYSTEM. 4. HORIZONTAL DATUM: CCS ZONE 3, NAD 83 (2011) (EPOCH:2010.0000) BASED ON STATIC GPS OBSERVATION AND PROCESSED BY NGS OPUS SYSTEM. DRILLED PIERS 1. REFER TO TECHNICAL SPECIFICATION SECTION 2632 FOR DRILLED SHAFT REQUIREMENTS. 2. THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER TO ESTABLISH THE DRILLED SHAFT LAYOUT PRIOR TO BEGINNING DRILLING. 3. "HARD ROCK" DRILLING IS DEFINED AS A PENETRATION RATE SLOWER THAN 30 MINUTES OF CONTINUOUS DRILLING PER FOOT USING A ROCK CORE BAREL OR OTHER HARD ROCK DRILLING EQUIPMENT WITH AT LEAST 15,000 POUNDS OF ROTARY TORQUE. EXCAVATION AND DETERMINATION OF HARD ROCK SHALL BE CONFIRMED BY THE ENGINEER. THE CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY IF HARD ROCK EXCAVATION CONDITIONS ARE ENCOUNTERED. CONCRETE 1. REFER TO TECHNICAL SPECIFICATION SECTION 3315 FOR CAST-IN-PLACE CONCRETE REQUIREMENTS. 2. ALL WORK SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF ACI 301: SPECIFICATION FOR STRUCTURAL CONCRETE FOR BUILDINGS. ALL STRUCTURAL CONCRETE SHALL COMPLY WITH THE PROVISIONS OF ACI 318-14. 3. READY-MIX CONCRETE SHALL BE MIXED AND DELIVERED IN ACCORDANCE WITH ASTM C94. 4. SUBMIT AND OBTAIN APPROVAL OF ALL MIX DESIGNS PRIOR TO PLACING CONCRETE. 5. CONCRETE SHALL BE NORMAL WEIGHT AND READY-MIXED WITH A MAXIMUM WATER TO CEMENT RATIO 0.45 AND A MAXIMUM MEASURED SLUMP OF 8 INCHES FOR DRILLED SHAFTS AND 4 INCHES FOR THE GRADE BEAM AND WALL STEM. 6. CEMENT SHALL CONFORM TO ASTM C150, TYPE II. 7. ALL AGGREGATE SHALL CONFORM TO ASTM C33. 8. ALL WATER SHALL BE CLEAN, POTABLE AND NOT DETRIMENTAL TO THE CONCRETE QUALITY. 9. CONCRETE SHALL HAVE A MINIMUM COMPRESSIVE STRENGTH OF 4,000 PSI AT 28 DAYS. CONCRETE PIPE 1. CONCRETE PIPE FOR NEW CULVERT SHALL CONFORM TO ASTM C76, CLASS III . REINFORCING STEEL 1. REINFORCING STEEL SHALL CONFORM TO ASTM A615, GR 60. 2. CONCRETE COVER SHALL BE A MINIMUM OF 3 INCHES. 3. REINFORCING STEEL BENDS, HOOKS, DEVELOPMENT LENGTHS AND SPLICES SHALL BE IN ACCORDANCE WITH DETAIL 6/SHEET 4. ASPHALT PAVEMENT 1. PAVEMENT CONSTRUCTION SHALL CONFORM TO TECHNICAL SPECIFICATION SECTION 2578 & SECTION 39 OF THE CALTRANS STANDARD SPECIFICATIONS. 2. ASPHALT OVERLAY SHALL BE CONSTRUCTED USING TYPE A, 1/2-INCH GRADED AGGREGATE. EROSION & SEDIMENT CONTROL 1. EROSION AND SEDIMENT CONTROL MEASURES SHALL COMPLY WITH ALL REQUIREMENTS OUTLINED IN THE MARIN COUNTY STORMWATER POLLUTION PREVENTION PROGRAM (MCSTOPPP) MINIMUM CONTROL MEASURES FOR SMALL CONSTRUCTION PROJECTS AS OUTLINED IN THE MCSTOPPP CONSTRUCTION EROSION AND SEDIMENT CONTROL PLAN APPLICANT PACKAGE. 2. ANY AREAS IN WHICH GROUND SURFACE AND VEGETATIVE COVER HAS BEEN DISTURBED BY CONSTRUCTION ACTIVITIES SHALL BE COVERED WITH A PRE-APPROVED SEED MIX AND BIODEGRADABLE EROSION CONTROL MATS UPON COMPLETION OF CONSTRUCTION. 3. EROSION CONTROL MATS SHALL CONSIST OF NORTH AMERICAN GREEN SC150 OR APPROVED EQUAL. RIP RAP 1. RIP RAP SHALL CONFORM TO CLASS 2 ROCK SLOPE PROTECTION IN ACCORDANCE WITH SECTION 72 OF THE 2018 CALTRANS STANDARD SPECIFICATIONS. 2. ROCK SLOPE PROTECTION FABRIC SHALL CONSIST OF MIRAFI 500X OR APPROVED EQUAL. WALL DRAINAGE 1. PERMEABLE MATERIAL USED FOR WALL DRAINAGE AND BACKFILLING UNDERMINED PORTION OF EXISTING RETAINING WALL SHALL CONSIST OF CALTRANS TYPE A CLASS 1 PERMEABLE MATERIAL. 2. FILTER FABRIC SHALL CONSIST OF MIRAFI 140N OR APPROVED EQUAL. DRAINAGE PIPE FOR CULVERT EXTENSION 1. DRAINAGE PIPE AND FITTINGS FOR CULVERT EXTENSION SHALL CONSIST OF POLYVINYL CHLORIDE (PVC) WHICH CONFORMS TO ASTM D3034. 2. FLEXIBLE COUPLER WHICH CONNECTS EXISTING CONCRETE CULVERT AND NEW PVC CULVERT EXTENSION SHALL CONSIST OF COUPLING 12" CONCRETE X 12" PLASTIC (PART NO. 1006-1212) BY FERNCO INC. OR APPROVED EQUAL. SPECIAL INSPECTIONS 1. SPECIAL INSPECTION SHALL BE PERFORMED BY MILLER PACIFIC OR A QUALIFIED TESTING AND INSPECTION AGENCY DURING CONSTRUCTION, INCLUDING THE FOLLOWING: 1.1 DRILLED SHAFTS: INTERMITTENT OBSERVATION OF DRILLING. FINISHED DRILLED HOLE EXCAVATIONS SHALL BE OBSERVED PRIOR TO INSTALLING REINFORCING STEEL. 1.2 CONCRETE: INTERMITTENT OBSERVATION DURING PLACEMENT. CONCRETE SHALL BE SAMPLED AND CYLINDERS SHALL BE CAST FOR STRENGTH TESTING IN CONFORMANCE WITH ASTM C39. A MINIMUM OF 1 CYLINDER SHALL BE TESTED AT 7 DAYS AND A MINIMUM OF 3 CYLINDERS SHALL BE TESTED AT 28 DAYS. 1.3 REINFORCEMENT: REINFORCING STEEL SHALL BE OBSERVED PRIOR TO PLACEMENT INTO DRILLED HOLES FOR DRILLED SHAFTS AND PRIOR CONCRETE PLACEMENT FOR GRADE BEAM AND WALL STEM. 1.4 WALL DRAINAGE: FILTER FABRIC, CLASS 1 PERMEABLE MATERIAL AND WEEPHOLES SHALL BE OBSERVED PRIOR TO COVERING WITH BACKFILL. 1.5 WALL BACKFILL: WALL BACKFILL PLACEMENT SHALL BE OBSERVED AND FIELD DENSITY SHALL BE PERFORMED DURING BACKFILLING. TOWN OF FAIRFAX STORM DAMAGE REPAIR, 78 WREDEN AVE FEMA DR-4431-CA FAIRFAX, CALIFORNIA 100% DESIGN SUBMITTAL RCA 7/5/2022
BID SET RCA 7/18/2022

ATTACHMENT A
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245 SSMH POWER POLE SSMH WATER LINE EDGE OF PAVEMENT APPROX LIMITS OF TOWN ROW/PROPERTY LINE FOR 78 WREDEN AVE MANZANITA ROAD WREDEN AVE EDGE OF PAVEMENT FIRE HYDRANT WATER VALVE 12 IN CONCRETE CULVERT OH LINES CONCRETE RETAINING WALL COUNTERFORTS BELOW WALL APPROX ALIGNMENT OF FENCLINE RETAINING WALLFOR STREET PARKING DRIVEWAY RETAINING WALL WALKWAY AT 78 WREDEN AVE HEAVY BRUSH AND OVERGROWTH 12 IN TREE 18 IN TREE B-1 B-3 B-2 GAS LINES OH LINES Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

SITE PLAN - EXISTING CONDITIONS
2 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA
SAS
90% DESIGN SUBMITTAL RCA SCALE
0 2.5
5 10 FEET SITE PLAN - EXISTING CONDITIONS (SCALE: 1" = 5'-0") 1 -
3/22/2021
100% DESIGN SUBMITTAL RCA 7/5/2022
1 BID SET RCA 7/18/2022 \ \ \ \ \
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245 STA 1+00.0 TW: 238.5 BW: 234.0 STA 1+18.0 TW: 238.5 BW: 231.0 STA 1+34.6 TW: 240.5 BW: 233.0 STA 1+41.0 TW: 240.5 BW: 237.0 A
3 DRILLED SHAFT, DETAIL 3/SHEET 4 (N) CONCRETE RETAINING WALL, DETAIL 1/SHEET 4 (E) CONCRETE RETAINING WALL, PROTECT IN PLACE RIP RAP DISSIPATOR, DETAIL 4/SHEET 4 EXTEND CULVERT THROUGH (N) WALL, DETAIL 4/SHEET 4 APPROX LIMITS OF FENCE WITH RIPRAP BELOW B-1 B-3 B-2 REMOVE & REPLACE (E) CULVERT WITH (N) 12 IN CONC CULVERT
4 FT TERMINATE WALL AT FENCLINE PROTECT (E) FENCE IN PLACE APPROX LIMITS OF 2 INCH ASPHALT OVERLAY 1+00 1+10 1+20 1+30 1+40 1+50 220 225 230 235 240 245 250 215 210 220 225 230 235 240 245 250 215 210 3 A DRILLED SHAFT DETAIL 3/SHEET 4 6 FT MAX
WALL
HEIGHT
(E) CONCRETE RETAINING WALL

TOP OF WALL, TW BOTTOM OF WALL, BW

MIN EMBEDMENT,
DETAIL 3/SHEET 4
(N) CONCRETE RETAINING
WALL, DETAIL 1/SHEET 4
(N) 12-IN-DIAM PVC OUTFALL, DETAIL 5/SHEET 4 (E) 12-IN CONCRETE CULVERT TO BE RELINED WITH CIPP TERMINATE WALL AT FENCLINE 220 225 230 235 240 245 250 215 210 220 225 230 235 240 245 250 215 210 APPROX LIMITS OF TOWN ROW/PROPERTY LINE FOR 78 WREDEN AVE EXTEND (E) CULVERT THROUGH (N) WALL, DETAIL 5/SHEET 4 (N) CONCRETE RETAINING WALL, DETAIL 1/SHEET 4 (N) RIP RAP DISSIPATOR BELOW CULVERT OUTLET, DETAIL 4/SHEET 4 (E) GRADE WREDEN AVE (N) 12-IN CONC CULVERT (E) CONCRETE WALL WITH UNDERMINED FOOTING BACKFILL WALL PER DETAIL 1/SHEET 4 DRILLED SHAFT, DETAIL 3/SHEET 4 WALL
HEIGHT DETAIL 3/SHEET 4
MIN EMBEDMENT, GRADE 3-FT-WIDE +/- LEVEL BENCH FOR DRILLED SHAFT & WALL CONSTRUCTION Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

RETAINING WALL PLAN, PROFILE & SECTION
3 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA
SAS
90% DESIGN SUBMITTAL RCA SCALE
0 2.5
5 10 FEET RETAINING WALL PLAN (SCALE: 1" = 5'-0") 1
- RETAINING WALL PROFILE (SCALE: 1" = 5'-0")
2 - RETAINING WALL SECTION (SCALE: 1" = 5'-0")
A
-
3/22/2021
100% DESIGN SUBMITTAL RCA 7/5/2022 1
BID SET RCA 7/18/2022
NO. 5 VERTICAL BARS AT 12 IN CENTERED IN WALL STEM, TERMINATE INTO GRADE BEAM WITH STD HOOK 10 IN NO. 5 HORIZ BARS SPACED AT 12 IN

WALL HEIGHT,
8 FT MAX (6) NO. 6 LONGITUDINAL BARS NO. 4 STIRRUPS SPACED AT XX IN 3 IN WEEPHOLES SPACED AT 6 FT 24 IN 24 IN DRILLED SHAFT, DETAIL 3/SHEET 4 (DRILLED SHAFT REINFORCING NOT SHOWN FOR CLARITY) WREDEN AVE (E) CONCRETE WALL WITH UNDERMINED FOOTING BACKFILL VOID WITH CALTRANS CLASS 1 PERMEABLE MATERIAL FULLY ENCASED IN MIRAFI 140N OR APPROVED EQUAL. PLACE IN LIFTS OF 8 INCHES OR LESS AND COMPACT USING VIBRATORY COMPACTION EQUIPMENT RETAINING WALL LAYOUT LINE CAP UPPER 12 IN OF BACKFILL WITH CLAYEY SOIL COMPACTED TO 90% RELATIVE COMPACTION CAP PERMEABLE MATERIAL WITH 12 IN MIN. OF CLAYEY SOIL COMPACTED TO 90% REL. COMP. SLOPE BACKFILL BETWEEN WALLS AT 2:1 OR FLATTER 4FT RETAINING WALL LAYOUT LINE ℄DRILLED SHAFT
℄DRILLED SHAFT
℄ RETAINING WALL STEM DRILLED SHAFT BELOW GRADE BEAM NO (5) VERTICAL BAR AT 12 IN CENTERED IN WALL STEM NO (5) HORIZONTAL BAR AT 12 IN 10 IN
24 IN 3-IN WEEPHOLE AT 6 FT SPACING 6 FT MAX BACKFILL PER DETAIL 1/SHEET 4 RETAINING WALL STEM ℄DRILLED SHAFT RETAINING WALL LAYOUT LINE
3 IN
3 IN (6) NO. 8 BARS, TERMINATE INTO GRADE BEAM WITH STD HOOK (10) NO. 8 BARS, TERMINATE INTO GRADE BEAM WITH STD HOOK WALL HEIGHT LESS THAN 6 FEET WALL HEIGHT GREATER THAN 6 FEET (10) NO. 8 BARS, TERMINATE INTO GRADE BEAM WITH STD HOOK NO. 4 SPIRAL AT 6 IN PITCH WALL HEIGHT MIN. EMBEDMENT 4 FT OR LESS 10 FT 4 TO 6 FT 12 FT 6 TO 8 FT 15 FT DRILLED SHAFT EMBEDMENT 24 IN 24 IN 10 FT
5 FT
A
4 (N) CONC RETAINING WALL, DETAIL 1/SHEET 4 RIP RAP DISSIPATOR DRILLED SHAFT, DETAIL 3/SHEET 4 (E) CONC RETAINING WALL, PROTECT IN PLACE (N) 12 IN CONC CULVERT EXTEND CULVERT THROUGH (N) WALL, DETAIL 5/SHEET 4 4 FT RISER FOR CULVERT EXTENSION 5 FT 18 IN (E) GRADE 1.5 1 RIP RAP (N) CONCRETE RETAINING WALL, DETAIL 1/SHEET 4 LINE EXCAVATED AREA WITH MIRAFI 500X OR APPROVED EQUAL 12 IN CONCRETE/PVC COUPLING BY FERNCO INC.(PART NO. 1006-1212) OR APPROVED EQUAL 12 IN x 12 IN x 12 IN TEE FITTING 12 IN x 12 IN 90 DEG FITTING (N) CONCRETE RETAINING WALL, DETAIL 1/SHEET 4 RIP RAP DISSIPATOR, DETAIL 4/SHEET 4 12 IN PVC PIPE RISER EXTEND PVC OUTFALL THROUGH WALL AND CUT FLUSH WITH FACE OF WALL SEE DETAIL 7/SHEET 4 FOR REINFORCING AROUND PIPE (N) 12 IN CONCRETE CULVERT. ABUT END OF CULVERT TO BACK OF WALL AND HAND PACK GROUT AROUND PERIMETER OF (N) PIPE AS REQUIRED TO SEAL (E) CONCRETE WALL WITH UNDERMINED FOOTING WREDEN AVE Dmin 4db OR 2-1/2 IN MIN db 180° HOOK Dmin 12 db
db 90° HOOK BAR SIZE Dmin NO. 3 TO NO. 8 6 x db NO. 9 TO NO. 11 8 x db NO. 14 TO NO. 18 10 x db BAR SIZE Dmin NO. 3 1-1/2 IN NO. 4 2 IN NO. 5 2-1/2 IN PRINCIPAL REINFORCMENT HOOPS & STIRRUPS MINIMUM REBAR BEND DIAMETERS (Dmin) DEVELOPMENT LENGTH 28-DAY COMP STRENGTH LOCATION BAR SIZE NO.3 NO. 4 NO. 5 NO. 6 NO. 7 NO. 8 NO. 9 NO. 10 NO. 11 4,000 PSI TOP 12 IN 15 IN 23 IN 23 IN 37 IN 47 IN 58 IN 70 IN 84 IN BOTTOM 12 IN 12 IN 17 IN 18 IN 29 IN 36 IN 44 IN 54 IN 65 IN 5,000 PSI TOP 12 IN 14 IN 20 IN 20 IN 33 IN 42 IN 52 IN 63 IN 75 IN BOTTOM 12 IN 12 IN 16 IN 16 IN 26 IN 32 IN 40 IN 49 IN 58 IN HOOKED DEVELOPMENT LENGTH 28-DAY COMP STRENGTH LOCATION BAR SIZE NO.3 NO. 4 NO. 5 NO. 6 NO. 7 NO. 8 NO. 9 NO. 10 NO. 11 4,000 PSI N/A 8 IN 10 IN 12 IN 15 IN 17 IN 19 IN 22 IN 24 IN N/A 5,000 PSI N/A 7 IN 9 IN 11 IN 13 IN 15 IN 17 IN 20 IN 22 IN N/A LAP SPLICE LENGTH 28-DAY COMP STRENGTH LOCATION BAR SIZE NO.3 NO. 4 NO. 5 NO. 6 NO. 7 NO. 8 NO. 9 NO. 10 NO. 11 4,000 PSI TOP 12 IN 20 IN 29 IN 29 IN 48 IN 62 IN 75 IN 91 IN 109 IN BOTTOM 12 IN 15 IN 23 IN 23 IN 37 IN 47 IN 58 IN 70 IN 84 IN 5,000 PSI TOP 12 IN 18 IN 26 IN 26 IN 43 IN 54 IN 67 IN 82 IN 98 IN BOTTOM 12 IN 14 IN 20 IN 20 IN 33 IN 42 IN 52 IN 63 IN 75 IN 3 IN TOP OF GRADE BEAM TOP OF RETAINING WALL NO. 4 BARS AROUND CULVERT EXTENSION, SET BACK 3 IN FROM FACE OF WALL CULVERT EXTENSION 3 IN MIN VARIES, 12 IN MIN 6 IN
MIN INVERT ELEV TO MATCH (E) CONCRETE PIPE CLASS 2 AB, COMPACT TO 95% RELATIVE COMP IN UPPER 12 IN AND 90% RELATIVE COMP BELOW 3 IN MIN OF 1/2-IN TYPE A ASPHALT COMPACTED TO 95% RELATIVE COMP Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

DETAILS
4 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA
SAS
90% DESIGN SUBMITTAL RCA RETAINING WALL DETAIL (NO SCALE) 1 - RETAINING WALL PLAN (NO SCALE)
2 - DRILLED SHAFT DETAIL (NO SCALE)
3 - RIP RAP DISSIPATOR SECTION RIP RAP DISSIPATOR DETAIL (NO SCALE) 4 - RIP RAP DISSIPATOR PLAN CULVERT EXTENSION (NO SCALE) 5 - REINFORCING DETAILS (NO SCALE)
6 -
3/22/2021 REINFORCING AT CULVERT EXTENSION (NO SCALE)
7 -
100% DESIGN SUBMITTAL RCA 7/5/2022 1 CONCRETE CULVERT (NO SCALE) 8 -
BID SET RCA 7/18/2022
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Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

BORING LOGS
5 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA

SAS MAJOR DIVISIONS SYMBOL DESCRIPTION

COARSE GRAINED SOILS
over 50% sand and gravelCLEAN GRAVEL GW Well-graded gravels or gravel-sand mixtures, little or no fines GRAVEL with fines CLEAN SAND SAND with fines GP GMGCSWSPSMSC Poorly-graded gravels or gravel-sand mixtures, little or no fines Silty gravels, gravel-sand-silt mixtures Clayey gravels, gravel-sand-clay mixtures Well-graded sands or gravelly sands, little or no fines Poorly-graded sands or gravelly sands, little or no fines Silty sands, sand-silt mixtures Clayey sands, sand-clay mixtures

FINE GRAINED SOILS
over 50% silt and clay SILT AND CLAY liquid limit <50% SILT AND CLAY liquid limit >50% ML CL OL MHCHOH HIGHLY ORGANIC SOILS PT ROCK Inorganic silts and very fine sands, rock flour, silty or clayey fine sands or clayey silts with slight plasticity Inorganic clays of low to medium plasticity, gravely clays, sandy clays, silty clays, lean clays Organic silts and organic silt-clays of low plasticity Inorganic silts, micaceous or diatomaceous fine sands or silts, elastic silts Inorganic clays of high plasticity, fat clays Organic clays of medium to high plasticity Peat, muck, and other highly organic soils Undifferentiated as to type or composition KEY TO BORING AND TEST PIT SYMBOLS CLASSIFICATION TESTS PI SAHYD P200 P4 PLASTICITY INDEX SIEVE ANALYSIS HYDROMETER ANALYSIS PERCENT PASSING NO. 200 SIEVE PERCENT PASSING NO. 4 SIEVE STRENGTH TESTS UCTXCU TXUU LABORATORY UNCONFINED COMPRESSION CONSOLIDATED UNDRAINED TRIAXIAL UNCONSOLIDATED UNDRAINED TRIAXIAL UC, CU, UU = 1/2 Deviator Stress SAMPLER TYPE MODIFIED CALIFORNIA STANDARD PENETRATION TEST THIN-WALLED / FIXED PISTON X DISTURBED OR HAND SAMPLER ROCK CORE SAMPLER DRIVING RESISTANCE BULK SAMPLE Modified California and Standard Penetration Test samplers are driven 18 inches with a 140-pound hammer falling 30 inches per blow. Blows for the initial 6-inch drive seat the sampler. Blows for the final 12-inch drive are recorded onto the logs. Sampler refusal is defined as 50 blows during a 6-inch drive. Examples of blow records are as follows: 25 sampler driven 12 inches with 25 blows after initial 6-inch drive 85/7" sampler driven 7 inches with 85 blows after initial 6-inch drive 50/3" sampler driven 3 inches with 50 blows during initial 6-inch drive or beginning of final 12-inch drive NOTE: Test boring and test pit logs are an interpretation of conditions encountered at the excavation location during the time of exploration. Subsurface rock, soil or water conditions may vary in different locations within the project site and with the passage of time. Boundaries between differing soil or rock descriptions are approximate and may indicate a gradual transition. LL LIQUID LIMIT FIGURE Drawn Checked Project No. Date: 7/18/2022 504 Redwood Blvd. Suite 220 Novato, CA 94947 T 415 / 382-3444 F 415 / 382-3450 FILENAME: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg www.millerpac.com A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED B-1 SOIL CLASSIFICATION CHART Fairfax - Wreden Avenue Retaining Wall Repair Fairfax, California 201.182 RCA DS (2.0) DRAINED DIRECT SHEAR (NORMAL PRESSURE, ksf) no affect on cementation coated with clay, oxides or carbonates Subsurface rock, soil and water conditions may differ in other locations and with the passage of time. NOTE: Test boring and test pit logs are an interpretation of conditions encountered at the location and time of exploration. Rock unaffected by weathering, no change with depth, rings under hammer impact A few stained fractures, slight discoloration, no mineral decomposition, Fracture surfaces coated with weathering minerals, moderate or localized discoloration Rock decomposition, thorough discoloration, all fractures are extensively Minerals decomposed to soil, but fabric and structure preserved Fresh Slight Moderate High Complete WEATHERING Withstands many heavy hammer blows, yields dust, small fragments Withstands few heavy hammer blows, yields large fragments Indentations <1/8 inch with moderate blow with pick end of rock hammer Crumbles under light hammer blows Crumbles by rubbing with fingers Very strong Strong Moderate Weak Friable STRENGTH Rock scratches metal Difficult to scratch, knife scratch leaves dust trace Easily scratched with a knife, friable Carved or gouged with a knife Very hard Hard Moderate Low HARDNESS Very thickly bedded Thickly bedded Medium bedded Thinly bedded Very thinly bedded Laminated greater than 6 feet 2 to 6 feet 8 to 24 inches 2-1/2 to 8 inches 3/4 to 2-1/2 inches less than 3/4 inch Very widely fractured Widely fractured Moderately fractured Closely fractured Intensely fractured Crushed Fracture Classification Spacing Bedding Classification FRACTURING AND BEDDING FIGURE Drawn Checked Project No. Date: 7/18/2022 504 Redwood Blvd. Suite 220 Novato, CA 94947 T 415 / 382-3444 F 415 / 382-3450 FILENAME: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg www.millerpac.com A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED B-2 ROCK CLASSIFICATION CHART Fairfax - Wreden Avenue Retaining Wall Repair Fairfax, California 201.182 RCA *REFERENCE: Topographic Survey by Randall T. Willis (undated) ELEVATION: 242 feet* DATE: 10/25/2019 EQUIPMENT: Portable Hydraulic Drill Rig with 4-inch Solid Flight Auger SAMPLE
SYMBOL (4)
DEPTH
meters
feet
BLOWS / FOOT (1)

DRY UNIT
WEIGHT pcf (2)

MOISTURE
CONTENT (%)
SHEAR
STRENGTH psf (3)
OTHER TEST DATABORING 1
3 00
5 12 10345 1520 NOTES:6 (3) METRIC EQUIVALENT STRENGTH (kPa) = 0.0479 x STRENGTH (psf) (2) METRIC EQUIVALENT DRY UNIT WEIGHT kN/m = 0.1571 x DRY UNIT WEIGHT (pcf) (4) GRAPHIC SYMBOLS ARE ILLUSTRATIVE ONLY (1) UNCORRECTED FIELD BLOW COUNTS OTHER TEST DATA 10 111 15.3 1000 UC 12 Inches of Asphalt over 6 inches of Aggregate Base Water level encountered during drilling Water level measured after drilling 29 105 22.6 2600 UC Sandy CLAY with Gravel (CL) brown, moist, medium stiff to stiff, low plasticity, asphalt and concrete fragments noted in sample 12 107 16.9 800 UC CLAY (CL) brown, moist, soft to medium stiff, low plasticity, trace gravel Sandy SILT with Gravel (ML) mottled tan/orange/gray, moist, soft to medium stiff, low plasticity SANDSTONE orange and gray, low to moderate hardness, weak, highly weathered, includes thin clay seams 5 109 19.9 400 UC Bottom of boring at 15.3 feet No groundwater observed during drilling 50/3" 10.0 harder drilling LL 35 PL 26 PI 9 LL 32 PL 22 PI 10 FIGURE Drawn Checked Project No. Date: 7/18/2022 504 Redwood Blvd. Suite 220 Novato, CA 94947 T 415 / 382-3444 F 415 / 382-3450 FILENAME: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg www.millerpac.com A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED B-3 BORING LOG Fairfax - Wreden Avenue Retaining Wall Repair Fairfax, California 201.182 RCA *REFERENCE: Topographic Survey by Randall T. Willis (undated) ELEVATION: 242 feet* DATE: 10/25/2019 EQUIPMENT: Portable Hydraulic Drill Rig with 4-inch Solid Flight Auger SAMPLE
SYMBOL (4)
DEPTH
meters
feet
BLOWS / FOOT (1)

DRY UNIT
WEIGHT pcf (2)

MOISTURE
CONTENT (%)
SHEAR
STRENGTH psf (3)
DRILL RATE BORING 2
3 00
5 12 10345 1520 NOTES:
6 (3) METRIC EQUIVALENT STRENGTH (kPa) = 0.0479 x STRENGTH (psf) (2) METRIC EQUIVALENT DRY UNIT WEIGHT kN/m = 0.1571 x DRY UNIT WEIGHT (pcf) (4) GRAPHIC SYMBOLS ARE ILLUSTRATIVE ONLY (1) UNCORRECTED FIELD BLOW COUNTS OTHER TEST DATA 6 103 11.7 12 Inches of Asphalt over 6 inches of Aggregate Base Water level encountered during drilling Water level measured after drilling 45 122 13.0 5400 UC Sandy CLAY with Gravel (CL) orange-brown, moist, medium stiff to stiff, low to medium plasticity 10 103 11.7 500 UC CLAY (CL) brown, moist, stiff, low to medium plasticity Sandy SILT with Gravel (ML) brown, moist, stiff, low to medium plasticity SANDSTONE orange and gray, low to moderate hardness, weak, highly weathered, includes thin clay seams 15 108 17.0 2800 UC 50/2" 6.3 harder drilling Bottom of boring at 16.5 feet Minor groundwater seepage noted in bottom of hole prior to backfilling 10 MIN/FT 15 MIN/FT FIGURE Drawn Checked Project No. Date: 7/18/2022 504 Redwood Blvd. Suite 220 Novato, CA 94947 T 415 / 382-3444 F 415 / 382-3450 FILENAME: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg www.millerpac.com A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED B-4 BORING LOG Fairfax - Wreden Avenue Retaining Wall Repair Fairfax, California 201.182 RCA *REFERENCE: Topographic Survey by Randall T. Willis (undated) ELEVATION: 231 feet* DATE: 10/25/2019 EQUIPMENT: Portable Hydraulic Drill Rig with 4-inch Solid Flight Auger SAMPLE
SYMBOL (4)
DEPTH
meters
feet
BLOWS / FOOT (1)

DRY UNIT
WEIGHT pcf (2)

MOISTURE
CONTENT (%)
SHEAR
STRENGTH psf (3)
DRILL RATE BORING 3
3 00
5 12 10345 1520 NOTES:6 (3) METRIC EQUIVALENT STRENGTH (kPa) = 0.0479 x STRENGTH (psf) (2) METRIC EQUIVALENT DRY UNIT WEIGHT kN/m = 0.1571 x DRY UNIT WEIGHT (pcf) (4) GRAPHIC SYMBOLS ARE ILLUSTRATIVE ONLY (1) UNCORRECTED FIELD BLOW COUNTS

OTHER TEST DATA
4 86 30.5 Water level encountered during drilling Water level measured after drilling 75 126 11.1 Sandy CLAY with Gravel (CL) gray and brown, soft, wet, low to medium plasticity4 104 20.5 200 UC SANDSTONE tan and gray, moderate hardness, moderate strength, highly weathered 27 121 13.8 2000 UC 50/6" 7.9 harder drilling Bottom of boring at 15.5 feet Groundwater measured at 12.5 feet upon completion of drilling FIGURE Drawn Checked Project No. Date: 7/18/2022 504 Redwood Blvd. Suite 220 Novato, CA 94947 T 415 / 382-3444 F 415 / 382-3450 FILENAME: 201.182 Drawings, Rev 0, 100% Design Submittal.dwg www.millerpac.com A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED B-5 BORING LOG Fairfax - Wreden Avenue Retaining Wall Repair Fairfax, California 201.182 RCA sample includes shale interbedded within sandstone 400 UC 90% DESIGN SUBMITTAL RCA 3/22/2021
100% DESIGN SUBMITTAL RCA 7/5/2022 1
BID SET RCA 7/18/2022
~MIIUR PACIFIC --f------~~=~

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240
235
245 INSTALL SILT FENCING DOWNSLOPE OF PROJECT AREA PER CALTRANS STD T51 12 IN CULVERT (N) CONCRETE RETAINING WALL (E) CONCRETE WALL INSTALL DRAIN INLET PROTECTION PER CALTRANS STD T61 INSTALL EROSION CONTROL MATS ON ALL AREAS DISTURBED BY GRADING PER CALTRANS STD H52 AND HYDROSEED Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

EROSION & SEDIMENT CONTROL
6 Storm Damage Repair
78 Wreden Ave
Fairfax, California
201.182
RCA
RCA

SAS SCALE
0 2.5
5 10 FEET EROSION & SEDIMENT CONTROL PLAN (SCALE: 1" = 5'-0") 1 -
90% DESIGN SUBMITTAL RCA 3/22/2021
100% DESIGN SUBMITTAL RCA 7/5/2022 1
BID SET RCA 7/18/2022 )verhead Vire LP :lev. 251.3
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NS
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Marin County Stormwater Pollution Prevention Program
Minimum Control Measures
For Small Construction Projects
NOTE: REMEMBER THAT STORM DRAINS

AND RUNOFF FLOW DIRECTLY TO
CREEKS, RIVERS ANO a.a.vs UNTREATED
Erosion Controls Sediment Controls
Schedulini:i 6. Trackinq Controls
Preserve Veaetation & Creek Set Backs 7. Fiber Rolls
Good Housekeeninn

10. Concrete Washout

11. Stockoile Manaaement
2 Soil Cover 8. Silt Fence 12. Hazardous Material Manaaement 3 Soil Preparation/ Rouqheninq 9. Drain Inlet Protection 13. Sanitary Waste Manaqement 4 Erosion Control Blankets NS Trench Dewaterina 14. Eauioment and Vehicle Maintenance 5 Reveaetation 15. Litter and Waste Manaaement
NS=not shown on graphic
Note: Select an effective combination of control measures from each category, Erosion Control, Sediment Control, and Good Housekeeping. Control measures shall be continually implemented and maintained throughout the project until activities are complete, disturbed areas are stabilized with permanent erosion controls, and the local agency has signed off o n permits that may have been required for the project. Inspect and maintain the control measures before and after rain events. and as required by the local agency or state permit
More detailed information on the BMPs can be found in the related California Stormwater Quality Association (CASQA) and California Department of Transportation (Caltrans) BMP Factsheets. CASQA factsheets are available by subscription in the Ca!ifomia Best Management Practices Handbook Pottal.- Construction athttp://wwwcasqa.org. Caltrans factsheets are available in the Consfruction Sife BMP Manual March 2003 at http:l/www.dot.ca.gov/hq/construc/stormwater/manuals.htm Visit www.mcstoppp.org for more information on construction site management and Erosion and Sediment Control Plans.

If you require materials in alternative formats, please contact:
415-473-4381 voice/TTY or [email protected] Not,;,s

1. M"ls•blankcl:s ~hould be ir·st,il~..J
vc~ica[:, dcmT1S'opc
Slae)l€1 b1M ket6 Su'li~i<l,llly la
ensu:e lhal rna•.erial -,,,11
geotexti!e Fiter
tabrlc under
typlcel treatment
Wet Slope Lining
Not To S::1le
No:e: Actu.i l lJ~·out de:ermined in tl".efield.

Diversion rl~r:ie required
where grade e~ceeds 2½ ~ - c;,aa'-"'
===
SEC TION A - A liner
Str,,w W'1ttlos
;,Ion:; Mntni:r
Suppl~ 'l•ia1crto Wash
\'1/Mi!IS ifl','~OOSScli')'
3-4••
Cn,~herl
ruck
\___ Div€1rsion ;idg€1 aoo 1 2"" min~ str:l'I,' wat:.e depth 20n rnir1 for light trucks or ilS long ~s ~iln fit on ~it<:

Plan Notes
_j
1 The entrance shall be maintained to prevent sediment tracking or flowing cnto public right-of-ways Tnis may require top dressir,g. repair andlor cleanout or other measures that trap sediment. 2 When ~ces3ar1, wheels s;1all be cleaned prior to entering public rigi1t-0f-woy
3 Wi1€n washing is r€quirerl, it shall h€ done on r.n .~rf!r. s1c1hi li7.ffl w,th crushed stone th.:,t drains into an approved sediment trap or sediment basin. Rumble plales or Ure wash can be added
Site Entrance
Extr:i ~treng1h fi lter fabric: n,,e,;ed
witt-out ·;.,ire mesh suppoct
SLOPE
without wire support fence St..al or w:::iod l)JSt
N=s
Siltfunce a hal l 00 plaoJed level along
sbpe contours to maximize ponding
effk er.cy wi1h ,he en:'~ cvrved uphill tl'.l
improve abil ity t:o ret~ in water.
~- ln;poct and ropalr tonro atto r onch 81D rm
oJvent ,1nd remo-,•e soJ~ imentwl"Bn
accumulation reach1's 1 ,'3
barrier height

3. Remov"d sedirm,nt ~hall b" d"p:r,itt,.;J to
an area that wi I not contribute sedimect
cff-~ite a,id can be perruanentl:,, stabil;zed
Silt Fence

NOT TO SCALE
9erm\
A
36" 11 m) ~-lnx h,~lg:rl
P~n~ir:!B!e.!f!i2'
Trnnch Detail
4•~5•
(100-150rnrn)
TrEin th·,in~.
~omp:i,,..n:I
bac~rn
en tt-.r"" sides - Varies ---=----1
"
arleos}
I
A A A
V
,I
Pl~n
WBelow Grade""
No'.e: A~tu~l layoLit determined infield
/ Berm
Rough
hemloc<
fi·frame
Strn,,
Oale
Sand bag 0 0
Pinn Type ""Above Grade""
N~ttos~ale
Concrete Washout
Control Measure General Description
Erosion Control Best Management Practices
NIA Scheduling Plan the project and develop a schedule showing each phase of construction. Schedule construction activities to reduce erosion potential, such as scheduling ground disturbing activities during the summer and phasing projects to minimize the amount of area disturbed. For more info see the following factsheets. CASOA.- EC-1:
or Ca/tr.ms: SS-1
1 Preserve Preserve existing vegetation to the extent possible, especially along creek buffers. Show creek buffers on Existing maps and identify areas to be preserved in the field with temporary fencing. Check with the local Planning and Vegetation and Public Works Departments for specific creek set back requirements. For more info see the following Creek Setbacks factsheets· CASQA" EC-2; or Ca/trans.- SS-2 2 Soil Cover Cover exposed soil with straw mulch and tackifier (or equivalent). For more info see the following factsheets.

CASQA: EC-3, EC-5, EC-6, EC-7, EC-8, EC-14, EC-16; or Ca/trans: SS-2, SS-4, SS-5, SS-6, SS-7, SS-8. 3 Soil Preparation/ Soil preparation is essential to vegetation establishment and BMP installation. It includes soil testing and Roughening amendments to promote vegetation growth as well as roughening surface soils by mechanical methods {decompacting, scarifying, stair stepping, etc.). For more info see the following factsheets: CASQA: EC-15 4 Erosion Control Install erosion control blankets (or equivalent) on disturbed sites with 3:1 slopes or steeper. Use wildlifeBlankets friendly blankets made of biodegradable natural materials. Avoid using blankets made with plastic netting or fixed aperture netting. See: httQ://www.coastal.ca.gov/nQs!Wildlife-Friendl}". Products.Qdf. For more info see /he following factshee/s: CASQA: EC-7; or Caltran8: SS-7. 5 Revegetation Re-vegetate areas of disturbed soil or vegetation as soon as practical For more info see the following facrsheets.- CASQA: EC-4; or Ca/trans.- SS-4
Sediment Control Best Management Practices
6 Tracking Stabilize site entrance to prevent tracking soil otfsite Inspect streets daily and sweep street as needed Controls Require vehicles and workers to use stabilized entrance. Place crushed rock 12-inches deep over a geolexlile, using angular rock between 4 and 6-in. Make the entrance as long as can be accommodated on the site, ideally long enough for 2 revolutions of the maximum tire size (16-20 feet long for most light trucks).

Make the entrance wide enough to accommodate the largest vehide that will access the site, ideally 10 feet wide with sufficient radii for turning in and out of the site. Rumble pads or rumble racks can be used in lieu of or in conjunction with rock entrances. Wheel washes may be needed where space is limited or where the site entrance and sweeping is not effective. For more info see the following factsheets: CASQA: TC-1,- TC-3; or Ca/trans: TC-1: TC-3.
7 Fiber Rolls Use fiber rolls as a perimeter control measure, along contours of slopes, and around soil stockpiles. On slopes space rolls 10 to 20 feet apart (using closer spacing on steeper slopes). Install parallel to contour. If more than one roll is used in a raw overlap roll do not abut. J-hook end of roll upslope. Install rolls per e ither Type 1 (stake rolls into shallow trenches) or Type 2 (stake in front and behind roll and lash with rope). Use wildlife-friendly fiber rolls made of biodegradable natural materials. Avoid using fiber rolls made with plastic netting or fixed aperture netting. See: httg: //www.coastal.ca.gov/n gsfWildlife-Friendly: Products.gdf Manufactured linear sediment contml or compost socks can be used in lieu of fiber rolls For more info see the following factsheets: CASQA.- SE-5 (Type 1); SE-12, SE- 13: or Ca/trans: SC-5 (Type 1 and Type 2).
8 Silt Fence Use silt fence as a perimeter control measure, and around soil stockpiles. Install silt fence along contours.

Key silt fence into the soi l and stake. Do not use silt fence for concentrated water flows. Insta ll fence at least 3 feet back from the slope to allow for sediment storage. Wire backed fence can be used for extra strength Avoid installing silt fence on slopes because they are hard to maintain. Manufactured linear sediment control can be used in lieu of silt fences. For more info see the following factsheets.- CASQA.- SE-1: SE-12: or Ca/trans: SC-1.
9 Drain Inlet Use gravel bags, (or similar prcxluct) around drain inlets located both onsite and in gutter as a last line of Protection defense. Bags should be made of a woven fabric resistant to photo-degradation filled with 0.5-1-in washed crushed rock. Do not use sand bags or silt fence fabric for drain inlet protection. For more info see the following factsheets.- CASQA.- SE-10: or. Ca/trans.- SC-10.

NIA Trench Follow MCSTOPPP BMPs for trench dewatering. httg://1.vww.marincount~.orgJdegts/gw/divisions/mcsto[J;iQI Dewatering develogmenU-/media/Fi les!DeQf! rtmentsJPW /mcstoggg/develogrne11l/T renchi ngSW Rffi MCSTOP PP Fi nal6 0

9. Qdf. For more info see the following factsheets: CASQA: NS-2; or CR/trans: NS-2 Good Housekeeping Best Management Practices
10 Concrete Construct a lined concrete washout site away from storm drains, waterbodies, or other drainages. Ideally, Washout place adjacent to stabilized entrance. Clean as needed and remove at end of project. For more info see the following factsheets.- CASQA.- WM-8; or . Ca/trans: WM-8. 11 Stockpile Cover all stockpiles and landscape material and berm properly with fiber rolls or sand bags. Keep behind the Management site perimeter control and away from waterbodies. For more iofo see the following factsheels : CASQA: WM-3 or Ca/trans.- WM-3.
12 Hazardous Hazardous materials must be kept in closed containers that are covered and within secondary containment; Material do not place containers directly on soil. For more info see the following factsheets: CASQA. WM-6_: or Management Ca/trans: WM-6.
13 Sanitary Waste Place portable toilets near stabilized site entrance, behind the curb and away from gutters, storm drain inlets, Management and waterbodies. Tie or stake portable to ilets to prevent tipping and equip units with overflow pan/tray (most
vendors provide these). For more info see the following factsheets.- CASQA.- WM-9; or Caltrens.- WM-9. 14 Equipment and Prevent equ ipment fluid leaks onto ground by placing drip pans or plastic tarps under equipment. Immediately Vehicle clean up any spills or drips. For more info see /he following faclsheets: CASQA.- NS-8, NS-9, and NS-10; or Maintenance Ca/trans: NS-8, NS-9, and NS-10.
15 Litter and Waste Designate waste collection areas on site. Use watertight dumpsters and trash cans; inspect for leaks . Cover Management at the end of each work day and when it is raining or windy. Arrange for regular waste collection. Pick up site litter daily. For more info see the following facts/Jsets.- CASQA: WM-5; or Ca/trans.- WM-5.

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Fairfax City CouncilAugust 3, 2022

Fairfax City Council
August 3, 2022